Jamil Musel - Academia.edu (original) (raw)
Papers by Jamil Musel
Animals, 2023
The data provided in this article are partial fragments of the Cytochrome c oxidase subunit 1 mit... more The data provided in this article are partial fragments of the Cytochrome c oxidase subunit
1 mitochondrial gene (CO1) sequences of 175 tissues sampled from sharks and batoids collected from
Malaysian waters, from June 2015 to June 2022. The barcoding was done randomly for six specimens
from each species, so as to authenticate the code. We generated barcodes for 67 different species in
20 families and 11 orders. DNA was extracted from the tissue samples following the Chelex protocols
and amplified by polymerase chain reaction (PCR) using the barcoding universal primers FishF2
and FishR2. A total of 654 base pairs (bp) of barcode CO1 gene from 175 samples were sequenced
and analysed. The genetic sequences were blasted into the NCBI GenBank and Barcode of Life Data
System (BOLD). A review of the blast search confirmed that there were 68 valid species of sharks
and batoids that occurred in Malaysian waters. We provided the data of the COI gene mid-point
rooting phylogenetic relation trees and analysed the genetic distances among infra-class and order,
intra-species, inter-specific, inter-genus, inter-familiar, and inter-order. We confirmed the addition
of Squalus edmundsi, Carcharhinus amboinensis, Alopias superciliosus, and Myliobatis hamlyni as new
records for Malaysia. The establishment of a comprehensive CO1 database for sharks and batoids will
help facilitate the rapid monitoring and assessment of elasmobranch fisheries using environmental
DNA methods.
Tropical Biomedicine, 2022
Renocila richardsonae Williams & Bunkley-Williams, 1992 is recorded for the first time from Saraw... more Renocila richardsonae Williams & Bunkley-Williams, 1992 is recorded for the first time from Sarawak coastal waters. During a survey of marine fishes at depth of 200 metres in South China Sea, off the coast of Sarawak from 3° to 5°N and 110° to 111°E, five specimens of Renocila richardsonae were collected from Japanese goatfish, Upeneus japonicus (Houttuyn, 1782) (Mullidae) with average prevalence of 17% and mean intensity of one isopod per fish from examination of 64 fish. The isopod was observed to cause tissue damage on the site of attachment to the host.
Keywords: Fish isopod; Cymothoidae; Renocila; South China Sea; Upeneus japonicus.
Proceedings of the Aquatic Science Colloquium 2016: Experiences Sharing in Aquatic Science Research IV: Malaysia Exclusive Economic Zone (EEZ) Cruise and other Aquatic Science Research, 2016
Cephalopods are the third largest molluscan class after gastropods and bivalves. There are more t... more Cephalopods are the third largest molluscan class after gastropods and bivalves.
There are more than 800 species distributed in the World Ocean. Cuttlefish, squid
and octopus were major groups of cephalopods. Diversity of this group
presumably more are still unexplored and recorded, despite Malaysian known as
part of the high biodiversity region in South East Asia. Samples of cephalopods
were collected from selected stations in Sarawak Exclusive Economic Zone (EEZ)
using otter trawl net with stretch mesh size of 38 mm at the cod end. All samples
used in this study were by-catch of trawling activities during National Demersal
Fish Resource Survey in Sarawak (16 August until 6 October 2015). Trawling
operations were conducted beyond 12 nautical miles from the coast, and the area
were divided into three depth strata, I) 20-50 m, II) 50-100 m and III) 100-200 m.
In total 16 species of cephalopods inhabit Sarawak waters, representing five
families and eight genera. The present study found that high number of species
recorded in depth strata I (14 species) compared to strata II (12 species) and III
(11 species). Six species of the cephalopod in this study were first record in
Malaysian water, namely A. marginatus, A. rex, O. bartramii, S. brevimana, S.
vietnamica and S. prashadi. Hence, information on cephalopods diversity and
distribution in different depth strata could be useful in updating database on
Malaysian marine species diversity.
Proceedings of the Aquatic Science Colloquium 2016: Experiences Sharing in Aquatic Science Research IV: Malaysia Exclusive Economic Zone (EEZ) Cruise and other Aquatic Science Research, 2016
Sarawak and Sabah waters are hosts to a high diversity of elasmobranchs, with current known recor... more Sarawak and Sabah waters are hosts to a high diversity of elasmobranchs, with
current known records of 52 species of sharks and 58 species of rays. Our
study provides preliminary data on the diet and feeding ecology of select
elasmobranch taxa. Samples were obtained from the Department of Fisheries
Malaysia research cruises using demersal trawl at selected stations around Sabah
and Sarawak EEZ waters. Depth of the stations ranges from 52 to 151 meters. A
total of 101 stomachs belonging to 16 families (22 species) were examined.
Dietary differences were analysed according to three categories: sharks,
guitarfishes and rays. Fish (Superclass: Osteichthyes), shrimp (Family: Penaeidae,
Caridae, and unknown shrimp), lobster (Family: Nephropidae) and squid are
found to be the most important contributors to the general diet of elasmobranchs.
Prey preference varies between elasmobranch categories, with decrease in
consumption of Osteichthyes (from 46.93 % to 35.11 % and to 19.22 %) and
increase in consumption of crustacean (16.04 % to 43.39 % and to 79.51 %)
from sharks to guitarfishes and to rays. Our findings suggests a relationship
between prey choice and elasmobranch body form; the latter likely affects hunting
capabilities of the three different categories. Low to moderate degree of overlap
in food resource utilization indicates that the different elasmobranch categories
occupy unique ecological roles. Further species-specific biological studies are
needed to better understand and to tailor appropriate conservation actions and
management plans for these animals.
Proceedings of the Aquatic Science Colloquium 2016: Experiences Sharing in Aquatic Science Research IV: Malaysia Exclusive Economic Zone (EEZ) Cruise and other Aquatic Science Research, 2016
Ichthyoplankton refers to fish eggs and larvae which usually can be found near the surface of wat... more Ichthyoplankton refers to fish eggs and larvae which usually can be found near the
surface of water. A survey was carried out in Malaysia EEZ of South China Sea
from 19th August until 10th September 2015 in order to determine the composition
of ichthyoplankton at three different depth stratums (20-50m, 51-100m and 101-
200m). At each of the 20 stations covered, a double oblique plankton tow with
mesh-size of 330 μm and 500 μm was performed for about 20 minutes at a towing
speed of 2 to 3 knots. In this study, a total of 2,329 fish eggs and 3,006 fish larvae
ascribed to 16 orders with 52 families were obtained. Gobiidae, Engraulidae and
Scombridae were the top three dominant among 26 families of fish larvae found.
These 26 families (20 were commercial fish families) showed a wide larval
dispersal because they were collected at all depth. Unidentified larvae comprise
38.7 % of whole specimens collected in this study. The highest mean density (38.37
± 24.07 larvae/100 m3) of fish larvae was recorded at depth 20-50m, followed by
34.91 ± 16.97 larvae/100 m3at depth 51-100m and 29.25 ± 14.12 larvae/100 m3at
depth 101-200m. This paper provides some baseline data of fish larvae at some
parts of Malaysia EEZ off Sarawak and thus can help in providing latest
information about ichthyoplankton diversity in Sarawak waters.
Proceedings of the Aquatic Science Colloquium 2016: Experiences Sharing in Aquatic Science Research IV: Malaysia Exclusive Economic Zone (EEZ) Cruise and other Aquatic Science Research, 2016
Physicochemical characteristics of seawater play crucial role for productive marine ecosystem an... more Physicochemical characteristics of seawater play crucial role for productive
marine ecosystem and fisheries activities. However, the information of
physicochemical parameters in Sarawak Exclusive Economic Zone (EEZ) waters
was limited. Hence, the objective for this study was to determine the
physicochemical parameters in vertical profiles of Sarawak waters. Seawater
samples from 15 stations were collected for physicochemical analysis from the
Sarawak EEZ waters between 2 – 6 °N and 100 – 113 °E. The general range found
was for temperature: 18.80 – 30.13 °C; dissolved oxygen (DO): 4.80 – 7.80 mg/L;
salinity: 34.60 – 35.50 ‰; turbidity: 0.01 – 0.96 NTU; pH: 7.50 – 8.00;
chlorophyll-a: 0.01 – 3.81 μg/L;nitrogen (N): 0.01 – 0.09 mg/L; phosphate (P):
0.10 – 5.70 mg/L . In this study, the phytoplankton production (e.g. biomass) were
not P limited as the N/P ratios were lower than Redfield ratios and the nearsurface
waters received nutrients supply from deep waters during the water
mixing process. High P concentrations in the water column may indicated that the
dust deposition into the study area were interacted with anthropogenic derived
pollutants such as biomass burning that also caused haze.
Proceedings of the Aquatic Science Colloquium 2016: Experiences Sharing in Aquatic Science Research IV: Malaysia Exclusive Economic Zone (EEZ) Cruise and other Aquatic Science Research, 2016
This study was carried out on the qualitative and quantitative characteristics of phytoplankton ... more This study was carried out on the qualitative and quantitative characteristics of
phytoplankton and zooplankton species and the selected water quality parameters (i.e.
temperature, dissolved oxygen, salinity, turbidity and chlorophyll-a) that affects its
distribution in Malaysian Economic Exclusive Zone (EEZ) of Sarawak waters. The
water samples were collected during M.V. SEAFDEC 2 cruise from the 15 sampling
stations at 0 to 20 m depth range. During the study period, a total of 33 genera of
phytoplankton and zooplankton were determined. Seventeen of genera of
phytoplankton were identified that comprised of diatoms (6), dinoflagellates (9) and
cyanobacteria (2). Abundances of phytoplankton found to be different at sampling
stations as cyanobacteria was found higher at station nearer to coastal with shallow
water depth (55-70% of total density), whereas, diatoms was dominated at deeper
water depth (60-80% total density). Rhizosolenia sp., Thalassionema sp.,
Coscinodiscus sp. Ceratium sp., Ornithocercus sp., Protoperidinium sp. and
Oscillatoria sp. were most observed phytoplankton during this study. For zooplankton,
copepods were the most found with 81% of total zooplankton recorded from study sites
and 19% comprised of nauplii. A total of fifteen copepods species were identified and
Oithona sp., Paracalanus sp. and Corycaeus sp. were determined at most sampling
stations. In general, water quality parameters were recorded within the standard
values as temperature was ranged between 27.0 to 29.0 °C, dissolved oxygen between
4.3 to 6.7 mg/L, the salinity between 35.1 to 36.8 PSU and the turbidity between 0 to
0.9 NTU, respectively. Meanwhile, concentration of chlorophyll-a was detected higher
at shallow depth with 0.70-4.52μg/L as cyanobacteria and diatoms found to be high in
densities.
Proceedings of the Aquatic Science Colloquium 2016: Experiences Sharing in Aquatic Science Research IV: Malaysia Exclusive Economic Zone (EEZ) Cruise and other Aquatic Science Research, 2016
Marine fish is one of important sources for human diets due to it beneficial effects in reducing... more Marine fish is one of important sources for human diets due to it beneficial effects
in reducing the coronary heart disease. The fatty acids composition of liver oil from
three species of Lutjanus, such as Lutjanus lutjanus, L. madras and L. vitta were
examined. Fish liver oil was extracted by Bligh and Dyer method, followed by
derivatization of fatty acids to their respective fatty acid methyl esters (FAMEs)
and finally analyzed on gas chromatography-flame ionization detector (GC-FID).
The lipid content of liver tissue from three species of Lutjanus ranged from 1.10%
to 3.60% with the L. lutjanus showed the highest value of lipid. The gas
chromatograms of derivatized fatty acids have showed the most dominant fatty acid
in liver oil was palmitic acid ranged 41.45% to 58.03%. All three species of
Lutjanus studied contain high fraction of unsaturated fatty acid, where
polyunsaturated fatty acids (PUFAs) fraction were >40% of total fatty acids. It can
be concluded that Lutjanus fish can be considered as potential resources for
omega-3, omega-6 and omega-9.
Proceedings of the Aquatic Science Colloquium 2016: Experiences Sharing in Aquatic Science Research IV: Malaysia Exclusive Economic Zone (EEZ) Cruise and other Aquatic Science Research, 2016
The Exclusive Economic Zone (EEZ) along a coastline of Sabah and Sarawak occupying a strategic p... more The Exclusive Economic Zone (EEZ) along a coastline of Sabah and Sarawak
occupying a strategic position in the South China Sea. Fish have been widely used
as bioindicator for heavy metals pollution in marine ecosystem. The pollution
sources are come from agricultural practices, construction, dumping the
untreated sewage and also the oil spilling from the tanker. This situation are
leading to the increasing heavy metals concentration and which then will be intake
by marine organism especially fish. The concentration of the eight heavy metals
(As, Zn, Pb, Cd, Cr, Cu, Ni, Mg) in the four parts of fish namely muscle, gills and
intestine and liver from three species of sharks (Chiliscyllium griseum, C.
plagiosum and C. punctatum) were analyzed using Inductively Couple Plasma
Optical Emission Spectrophotometry (ICP-OES). Fish samples were collected from
the Sarawak EEZ region during the cruises of the SEAFDEC Research Vessel
between 20 August to 3rd October 2015. The concentration (μg/g) of three heavy
toxic metals (As, Pb and Cd) in the muscle of C. plagiosum, C. griseum and C.
punctatum, respectively, were As (0.25, 0.98, 0.23), Pb (not detected (n.d) in all
species) and Cd (0.14, n.d, n.d). While the concentration (μg/g) of three toxic
heavy metals in the liver of C. plagiosum, C. griseum and C.
punctatum,respectively, were As (5.17, 2.39, 2.30), Cd (2.33, 5.98, 15.97) and Pb
(n.d in all species). None of the concentration of toxic heavy metals in the muscles
and livers exceeded the standard guideline values and hence would not pose any
health hazard to consumers. Distrubution of other metals (Zn, Cr, Cu, Ni and Mg)
muscle and liver parts, as well as distribution of all metals analysed in unedible
parts (gills and intestine) were also reported. The heavy metal concentration is
varied significantly between different parts of the same fish species.
Proceedings of the Aquatic Science Colloquium 2016: Experiences Sharing in Aquatic Science Research IV: Malaysia Exclusive Economic Zone (EEZ) Cruise and other Aquatic Science Research, 2016
Groupers are keystone species, generally targeted by small scale artisanal fisheries, sports fis... more Groupers are keystone species, generally targeted by small scale artisanal fisheries, sports
fishing groups and aquaculturists. Reduction in population size may happen over time
leading to inbreeding which affect the overall health of the population. Despite the
importance of groupers as one of the commercial landings in Sarawak, genetic baseline
data on grouper populations inhabiting Sarawak waters is still unavailable. Therefore, this
study aims to carry out genetic analysis on six banded grouper collected during fisheries
resource survey in 2014, along coastal areas of Tanjung Sirik to Tanjung Kidurong, Bintulu
Sarawak, using standard molecular biology techniques. A total of 517 bp of Cytochrome
Oxidase I (COI) gene had been sequenced and matched E. sexfasciatus with accession
number KJ594989 in GenBank. Out of 15 individuals, eleven haplotypes were recorded,
with relatively high haplotype diversity (0.93). Genetic divergence values among samples
ranged between 0 to 0.97%, confirming all samples from one species. Both Neighbour
Joining and Maximum Parsimony phylogenetic trees shown the same tree topology,
concluding the monophyly of E. sexfasciatus from Sarawak waters with strong support of
100 % bootstrap value. These genetic baseline data suggest that the grouper populations in
the areas are healthy and hopefully this resource could be used in a sustainable and
responsible manner in future.
Proceedings of the Aquatic Science Colloquium 2016: Experiences Sharing in Aquatic Science Research IV: Malaysia Exclusive Economic Zone (EEZ) Cruise and other Aquatic Science Research, 2016
Current studies on marine mollusc distribution and diversity were only focused on the intertidal... more Current studies on marine mollusc distribution and diversity were only focused on
the intertidal area rather than subtidal area. Therefore, the objective of this study
is to study the community structure of the gastropod and bivalves at the Malaysia
Exclusive Economic Zone (EEZ) of Sarawak waters. The gastropod and bivalves
samples were collected using a grab sampler (Smith-McIntyre grab). The samples
were identified to the species level with the aid of stereo microscope. The total
species number found in this study was 95. The total species number of gastropods
and bivalves was 61 and 34, respectively. Species diversity of gastropod and
bivalve was between 1.223 to 2.959 bits/individual. For species evenness, the
highest value was recorded at station 8 and the lowest was at station 13 with
0.938 and 0.650, respectively. Meanwhile, the highest value of species richness
was recorded at station 26 (6.995) and the lowest was recorded at station 16
(1.248). The findings of the gastropod and bivalve study at Malaysia EEZ of
Sarawak waters contribute to the future management of the area.
Proceedings of the Aquatic Science Colloquium 2016: Experiences Sharing in Aquatic Science Research IV: Malaysia Exclusive Economic Zone (EEZ) Cruise and other Aquatic Science Research, 2016
Information on ichthyoplankton (fish eggs and larvae) is crucial to determine the fish recruitme... more Information on ichthyoplankton (fish eggs and larvae) is crucial to determine the
fish recruitment and breeding area in the natural habitats. To date,
ichthyoplankton baseline data within 5 to 12 nautical mile zone in Sarawak are
still lacking and nothing can be inferred about the importance of this zone for the
fish early life stage. Hence, this study was conducted to obtain the composition of
fish larvae community from Tanjung Sirik to Tanjung Datu, Sarawak waters. In
2014, three separate samplings covering 26 stations (5 – 7 July, 8 – 10 October
and 11 – 12 November) were performed. Plankton net (0.5 mm mesh size)
attached with a flowmeter was towed obliquely by a trawler boat to collect
ichthyoplankton during second and third samplings but pump method was used in
the first sampling. In this survey, a total of 568 fish larvae and 2,299 fish eggs
were obtained. The fish larvae samples comprise seven orders and consist of 16
families, namely Bothidae, Carangidae, Clupeidae, Cynoglossidae, Engraulidae,
Ephippidae, Gobiidae, Hemiramphidae, Leiognathidae, Mugilidae, Mullidae,
Ophichtidae, Pristigasteridae, Sciaenidae, Scombridae and Syngnathidae. Among
these families, the top three dominant families were Clupeidae, Gobiidae and
Engraulidae. The mean density of fish larvae and fish eggs at Muara Sadong to
Tanjung Datu area were 6.9 ± 6.4 FL/100 m3 and 27.6 ± 52.9 FL/100 m3,
respectively. However, these densities cannot be determined for Tanjung Sirik to
Muara Sadong area due to sampling approach limitation. These baseline data are
hoped to be useful for future fish stock management in Sarawak waters.
AACL Bioflux, 2022
The study explained the morphometric (length, L-weight, W) relationship (W=aL b) and the spawning... more The study explained the morphometric (length, L-weight, W) relationship (W=aL b) and the spawning season of anchovy and sardine sampled from the coastal waters of Lawas, Sarawak in 2017 until 2018. In the study, the dominant species of anchovy and sardine in Lawas waters were initially determined, which were Encrasicholina devisi and Sardinella fimbriata. The length-weight relationship was estimated via the FiSAT program, while the spawning season was discovered through ovary examination. The total length (TL) ranged from 4.2 cm-8.9 cm and 10.07 cm-14.60 cm for E. devisi and S. fimbriata respectively. The length-weight relationships were given by W = 0.005846L 3.0134 , r 2 = 0.8 for E. devisi while W = 0.07663L 2.1028 , r 2 = 0.71 for S. fimbriata. The asymptotic length (L∞) was estimated at 7.61 cm, growth coefficient (K) was 1.10 yr-1 , total mortality (Z) was 4.48 yr-1 , natural mortality (M) was calculated as 2.88 yr-1 and fishing mortality (F) was 1.60 yr-1 for E. devisi. On the other hand, S. fimbriata recorded the asymptotic length (L∞) at 15.61 cm, growth coefficient (K) was 0.97 yr-1 , total mortality (Z) was 3.23 yr-1 , natural mortality (M) was calculated as 2.17 yr-1 and fishing mortality (F) was 1.06 yr-1. The females reached the first sexual maturity at a size of 6.0 cm and 13.50 cm total length for E. devisi and S. fimbriata. The major spawning months were estimated to occur in June and November for E. devisi while March and July for S. fimbriata. The information obtained was important as a guideline for the management to establish a fishing regulation for a sustainable fishery in the waters of Lawas.
Borneo Journal of Resource Science and Technology, 2017
Physicochemical characteristics of seawater play crucial role for productive marine ecosystem and... more Physicochemical characteristics of seawater play crucial role for productive marine ecosystem and fisheries activities. The limited information of Sarawak surface seawaters provide objective to determine the physicochemical characteristics in Malaysia Exclusive Economic Zone off the Coast of Sarawak. A total of 38 samples were collected using Van Dorn Waals Sampler and the physicochemical characteristics were measured using physicochemical parameter probes. Ranges for dissolved oxygen (DO) was 3.73-6.83 mg/l, temperature was 27.03-30.13ºC, pH was 7.63-7.82, salinity was 33.77-36.77 ppt, turbidity was 0.01-1.01 NTU, chlorophylla concentration was 0.01-4.52 mg/l, nitrate was 0.01–0.08 mg/l, nitrite was 0.001–0.012 mg/l and phosphate was 0.01–5.95 mg/l. There was positive correlation between chlorophyll-a and nutrients that indicated the biological uptake by biota (e.g. phytoplankton). In conclusion, the present study shows that the Malaysia Exclusive Economic Zone off the Coast of Sar...
The Scientific World Journal, 2017
Sediment distributions in deep sea influence the benthic community structure and thus play an imp... more Sediment distributions in deep sea influence the benthic community structure and thus play an important role in shaping the marine ecosystem. Several studies on sediment characteristics had been conducted in South China Sea (SCS), but only limited to coastal areas of regions within SCS territories. Therefore, this study was carried out to analyze the benthic sediment profile in an area beyond 12 nautical miles off the coast of Sarawak, southern SCS. Sediment samples were collected from 31 stations, comprising three depth ranges: (I) 20–50 m, (II) 50–100 m, and (III) 100–200 m. The total organic matter (TOM) contents were determined and subjected to dry and wet sieving methods for particle size analysis. TOM contents in the deep area (>50 m) were significantly higher (p=0.05) and positively correlated (r=0.73) with silt-clay fraction. About 55% and 82% of stations in strata II and III, respectively, were dominated by silt-clay fractions (<63 μm mean diameter), coherent with TOM...
Tropical Life Sciences Research, 2017
Kajian ini menyediakan senarai gastropod marin yang pertama dari perairan Zon Ekonomi Eksklusif (... more Kajian ini menyediakan senarai gastropod marin yang pertama dari perairan Zon Ekonomi Eksklusif (ZEE) Sarawak. Sampel gastropod dikumpul dari stesen yang terpilih di ZEE Sarawak. Operasi menunda menggunakan pukat tunda dengan saiz regangan 38 mm pada penghujung pukat. Operasi menunda dijalankan di kawasan melebihi 12 batu nautika dari pesisir pantai dan kawasan stesen dibahagi kepada tiga strata kedalaman iaitu, I) 20-50 m, II) 50-100 m dan III) 100-200 m. Sebanyak 23 spesies gastropod telah dikenalpasti sepanjang dua bulan kajian yang bermula dari 16 Ogos hingga 6 Oktober 2015 di mana ia terdiri daripada 8 superfamili, 15 famili dan 20 genus. Superfamili Tonnidae diwakili 7 spesies, diikuti Muricoidea (5 spesies), Cypraeoidea (4 spesies), Buccinoidea dan Conoidea (2 spesies). Manakala lain-lain superfamili hanya diwakili satu spesies sahaja. Didapati hanya 3 spesies berada di 2 strata kedalaman iaitu Melo melo, Murex aduncospinosus dan Tonna galea. Selain daripada itu, didapati 9, 13 dan 4 spesies gastropod dijumpai masing-masing pada strata I, II dan III. Maklumat berkenaan taburan gastropod dengan perbezaan strata kedalaman di ZEE Sarawak sangat berguna dalam pengemaskinian pangkalan data diversiti spesies di Malaysia.
Aacl Bioflux, 2019
The present study describes the morphometric (length, L-weight, W) relationship (W = aL) and dete... more The present study describes the morphometric (length, L-weight, W) relationship (W = aL) and determined the spawning season of Acetes intermedius sampled from the coastal waters of Miri, Sarawak from March 2016 until February 2017. Morphometric measurements for individual shrimp (total length, TL and body weight, BW) were recorded and length-weight relationships were estimated using FiSAT program. The TL range from 15.97 to 40.45 mm and 12.95 to 42.05 mm for males and females Acetes respectively. The average male to female shrimp sex ratio was 1:4.13. The length-weight relationships were given by W = 0.0001869L or Log TW = 1.9232 Log TL – 3.7285, r = 0.75 for both sexes, W = 0.0001685L or Log TW = 1.9578 Log TL – 3.7733, r = 0.76 for female and W = 0.01314L or Log TW = 0.6224 Log TL – 1.8813, r = 0.75 for male. The asymptotic length (L∞) was estimated at 43.20 mm, while the growth co-efficient (K) was 1.20 yr. Total mortality (Z) was estimated at 3.39 yr, the natural mortality (M) w...
Malaysian Fisheries Journal, 2021
Conscious of the importance of the latest fishing technology, the innovation of fishing gears is ... more Conscious of the importance of the latest fishing technology, the innovation of fishing gears is a continuous effort in the fisheries study. As well as the deep-sea trap, a study was conducted in the waters of Miri to determine the construction cost between the conventional and improve deep-sea trap. The study was also done to examine the efficiency of 1-funnel (1F) and innovative (2F) deep-sea trap. The 1F trap is characterised by a 1-funnel entrance, while 2F trap is a 2-funnel entrance trap. A total of 40-unit traps were deployed in this study. Each station was positioned with 2 types of traps and were soaked for 7 days before harvested. The findings suggested that the 2F trap had caught 199 individuals, while 1F trap only caught 140 individuals. Overall, 23 species from 11 families were caught in the 2F trap, however the 1F trap only managed to caught 16 species from 7 families. Moreover, the 2F traps significantly have higher catch effort (CPUE) of 2.61 kg/unit than the 1F trap with CPUE 2.49 kg/unit. The results had revealed that the 2F trap is more efficient than the 1F trap for the development of reef and rock areas fishing and better fishing experience for the local fishermen in the future.
The studies were carried out between 9th July and 3rd August 1996 (3rd cruise) and 30th April and... more The studies were carried out between 9th July and 3rd August 1996 (3rd cruise) and 30th April and 30th May, 1997 (4th cruise) in the Exclusive Economic Zone of Sarawak and the western part of Sabah. The species distribution, abundance, composition and length-weight relationships of some commercially important fish were investigated and compared for both cruises. The results indicates that the overall catch rate ranged from 3.5 to 194 kg/hr and averaged at 55.9 kg/hr during the 3rd cruise. For the 4 cruise, it ranged from 10.9 to 90.5 kg/hr and averaged at 50.2 kg/hr. During the 3 cruise, 46.9% of the catch were dominated by demersal fish followed by 41.6% trash fish, 7.8% pelagic fish and 3.1% cephalopod. Priacanthidae was the most dominant family, which made up of 14.1% of the catch followed by Nemipteridae (10.8%), Carangidae (5.0%), Lutjanidae (3.7%) and Mullidae (2.1%). The ten most dominant species found during the 3rd cruise were 1. Priacanthus macracanthus (13.2%), 2. Nemipte...
Animals, 2023
The data provided in this article are partial fragments of the Cytochrome c oxidase subunit 1 mit... more The data provided in this article are partial fragments of the Cytochrome c oxidase subunit
1 mitochondrial gene (CO1) sequences of 175 tissues sampled from sharks and batoids collected from
Malaysian waters, from June 2015 to June 2022. The barcoding was done randomly for six specimens
from each species, so as to authenticate the code. We generated barcodes for 67 different species in
20 families and 11 orders. DNA was extracted from the tissue samples following the Chelex protocols
and amplified by polymerase chain reaction (PCR) using the barcoding universal primers FishF2
and FishR2. A total of 654 base pairs (bp) of barcode CO1 gene from 175 samples were sequenced
and analysed. The genetic sequences were blasted into the NCBI GenBank and Barcode of Life Data
System (BOLD). A review of the blast search confirmed that there were 68 valid species of sharks
and batoids that occurred in Malaysian waters. We provided the data of the COI gene mid-point
rooting phylogenetic relation trees and analysed the genetic distances among infra-class and order,
intra-species, inter-specific, inter-genus, inter-familiar, and inter-order. We confirmed the addition
of Squalus edmundsi, Carcharhinus amboinensis, Alopias superciliosus, and Myliobatis hamlyni as new
records for Malaysia. The establishment of a comprehensive CO1 database for sharks and batoids will
help facilitate the rapid monitoring and assessment of elasmobranch fisheries using environmental
DNA methods.
Tropical Biomedicine, 2022
Renocila richardsonae Williams & Bunkley-Williams, 1992 is recorded for the first time from Saraw... more Renocila richardsonae Williams & Bunkley-Williams, 1992 is recorded for the first time from Sarawak coastal waters. During a survey of marine fishes at depth of 200 metres in South China Sea, off the coast of Sarawak from 3° to 5°N and 110° to 111°E, five specimens of Renocila richardsonae were collected from Japanese goatfish, Upeneus japonicus (Houttuyn, 1782) (Mullidae) with average prevalence of 17% and mean intensity of one isopod per fish from examination of 64 fish. The isopod was observed to cause tissue damage on the site of attachment to the host.
Keywords: Fish isopod; Cymothoidae; Renocila; South China Sea; Upeneus japonicus.
Proceedings of the Aquatic Science Colloquium 2016: Experiences Sharing in Aquatic Science Research IV: Malaysia Exclusive Economic Zone (EEZ) Cruise and other Aquatic Science Research, 2016
Cephalopods are the third largest molluscan class after gastropods and bivalves. There are more t... more Cephalopods are the third largest molluscan class after gastropods and bivalves.
There are more than 800 species distributed in the World Ocean. Cuttlefish, squid
and octopus were major groups of cephalopods. Diversity of this group
presumably more are still unexplored and recorded, despite Malaysian known as
part of the high biodiversity region in South East Asia. Samples of cephalopods
were collected from selected stations in Sarawak Exclusive Economic Zone (EEZ)
using otter trawl net with stretch mesh size of 38 mm at the cod end. All samples
used in this study were by-catch of trawling activities during National Demersal
Fish Resource Survey in Sarawak (16 August until 6 October 2015). Trawling
operations were conducted beyond 12 nautical miles from the coast, and the area
were divided into three depth strata, I) 20-50 m, II) 50-100 m and III) 100-200 m.
In total 16 species of cephalopods inhabit Sarawak waters, representing five
families and eight genera. The present study found that high number of species
recorded in depth strata I (14 species) compared to strata II (12 species) and III
(11 species). Six species of the cephalopod in this study were first record in
Malaysian water, namely A. marginatus, A. rex, O. bartramii, S. brevimana, S.
vietnamica and S. prashadi. Hence, information on cephalopods diversity and
distribution in different depth strata could be useful in updating database on
Malaysian marine species diversity.
Proceedings of the Aquatic Science Colloquium 2016: Experiences Sharing in Aquatic Science Research IV: Malaysia Exclusive Economic Zone (EEZ) Cruise and other Aquatic Science Research, 2016
Sarawak and Sabah waters are hosts to a high diversity of elasmobranchs, with current known recor... more Sarawak and Sabah waters are hosts to a high diversity of elasmobranchs, with
current known records of 52 species of sharks and 58 species of rays. Our
study provides preliminary data on the diet and feeding ecology of select
elasmobranch taxa. Samples were obtained from the Department of Fisheries
Malaysia research cruises using demersal trawl at selected stations around Sabah
and Sarawak EEZ waters. Depth of the stations ranges from 52 to 151 meters. A
total of 101 stomachs belonging to 16 families (22 species) were examined.
Dietary differences were analysed according to three categories: sharks,
guitarfishes and rays. Fish (Superclass: Osteichthyes), shrimp (Family: Penaeidae,
Caridae, and unknown shrimp), lobster (Family: Nephropidae) and squid are
found to be the most important contributors to the general diet of elasmobranchs.
Prey preference varies between elasmobranch categories, with decrease in
consumption of Osteichthyes (from 46.93 % to 35.11 % and to 19.22 %) and
increase in consumption of crustacean (16.04 % to 43.39 % and to 79.51 %)
from sharks to guitarfishes and to rays. Our findings suggests a relationship
between prey choice and elasmobranch body form; the latter likely affects hunting
capabilities of the three different categories. Low to moderate degree of overlap
in food resource utilization indicates that the different elasmobranch categories
occupy unique ecological roles. Further species-specific biological studies are
needed to better understand and to tailor appropriate conservation actions and
management plans for these animals.
Proceedings of the Aquatic Science Colloquium 2016: Experiences Sharing in Aquatic Science Research IV: Malaysia Exclusive Economic Zone (EEZ) Cruise and other Aquatic Science Research, 2016
Ichthyoplankton refers to fish eggs and larvae which usually can be found near the surface of wat... more Ichthyoplankton refers to fish eggs and larvae which usually can be found near the
surface of water. A survey was carried out in Malaysia EEZ of South China Sea
from 19th August until 10th September 2015 in order to determine the composition
of ichthyoplankton at three different depth stratums (20-50m, 51-100m and 101-
200m). At each of the 20 stations covered, a double oblique plankton tow with
mesh-size of 330 μm and 500 μm was performed for about 20 minutes at a towing
speed of 2 to 3 knots. In this study, a total of 2,329 fish eggs and 3,006 fish larvae
ascribed to 16 orders with 52 families were obtained. Gobiidae, Engraulidae and
Scombridae were the top three dominant among 26 families of fish larvae found.
These 26 families (20 were commercial fish families) showed a wide larval
dispersal because they were collected at all depth. Unidentified larvae comprise
38.7 % of whole specimens collected in this study. The highest mean density (38.37
± 24.07 larvae/100 m3) of fish larvae was recorded at depth 20-50m, followed by
34.91 ± 16.97 larvae/100 m3at depth 51-100m and 29.25 ± 14.12 larvae/100 m3at
depth 101-200m. This paper provides some baseline data of fish larvae at some
parts of Malaysia EEZ off Sarawak and thus can help in providing latest
information about ichthyoplankton diversity in Sarawak waters.
Proceedings of the Aquatic Science Colloquium 2016: Experiences Sharing in Aquatic Science Research IV: Malaysia Exclusive Economic Zone (EEZ) Cruise and other Aquatic Science Research, 2016
Physicochemical characteristics of seawater play crucial role for productive marine ecosystem an... more Physicochemical characteristics of seawater play crucial role for productive
marine ecosystem and fisheries activities. However, the information of
physicochemical parameters in Sarawak Exclusive Economic Zone (EEZ) waters
was limited. Hence, the objective for this study was to determine the
physicochemical parameters in vertical profiles of Sarawak waters. Seawater
samples from 15 stations were collected for physicochemical analysis from the
Sarawak EEZ waters between 2 – 6 °N and 100 – 113 °E. The general range found
was for temperature: 18.80 – 30.13 °C; dissolved oxygen (DO): 4.80 – 7.80 mg/L;
salinity: 34.60 – 35.50 ‰; turbidity: 0.01 – 0.96 NTU; pH: 7.50 – 8.00;
chlorophyll-a: 0.01 – 3.81 μg/L;nitrogen (N): 0.01 – 0.09 mg/L; phosphate (P):
0.10 – 5.70 mg/L . In this study, the phytoplankton production (e.g. biomass) were
not P limited as the N/P ratios were lower than Redfield ratios and the nearsurface
waters received nutrients supply from deep waters during the water
mixing process. High P concentrations in the water column may indicated that the
dust deposition into the study area were interacted with anthropogenic derived
pollutants such as biomass burning that also caused haze.
Proceedings of the Aquatic Science Colloquium 2016: Experiences Sharing in Aquatic Science Research IV: Malaysia Exclusive Economic Zone (EEZ) Cruise and other Aquatic Science Research, 2016
This study was carried out on the qualitative and quantitative characteristics of phytoplankton ... more This study was carried out on the qualitative and quantitative characteristics of
phytoplankton and zooplankton species and the selected water quality parameters (i.e.
temperature, dissolved oxygen, salinity, turbidity and chlorophyll-a) that affects its
distribution in Malaysian Economic Exclusive Zone (EEZ) of Sarawak waters. The
water samples were collected during M.V. SEAFDEC 2 cruise from the 15 sampling
stations at 0 to 20 m depth range. During the study period, a total of 33 genera of
phytoplankton and zooplankton were determined. Seventeen of genera of
phytoplankton were identified that comprised of diatoms (6), dinoflagellates (9) and
cyanobacteria (2). Abundances of phytoplankton found to be different at sampling
stations as cyanobacteria was found higher at station nearer to coastal with shallow
water depth (55-70% of total density), whereas, diatoms was dominated at deeper
water depth (60-80% total density). Rhizosolenia sp., Thalassionema sp.,
Coscinodiscus sp. Ceratium sp., Ornithocercus sp., Protoperidinium sp. and
Oscillatoria sp. were most observed phytoplankton during this study. For zooplankton,
copepods were the most found with 81% of total zooplankton recorded from study sites
and 19% comprised of nauplii. A total of fifteen copepods species were identified and
Oithona sp., Paracalanus sp. and Corycaeus sp. were determined at most sampling
stations. In general, water quality parameters were recorded within the standard
values as temperature was ranged between 27.0 to 29.0 °C, dissolved oxygen between
4.3 to 6.7 mg/L, the salinity between 35.1 to 36.8 PSU and the turbidity between 0 to
0.9 NTU, respectively. Meanwhile, concentration of chlorophyll-a was detected higher
at shallow depth with 0.70-4.52μg/L as cyanobacteria and diatoms found to be high in
densities.
Proceedings of the Aquatic Science Colloquium 2016: Experiences Sharing in Aquatic Science Research IV: Malaysia Exclusive Economic Zone (EEZ) Cruise and other Aquatic Science Research, 2016
Marine fish is one of important sources for human diets due to it beneficial effects in reducing... more Marine fish is one of important sources for human diets due to it beneficial effects
in reducing the coronary heart disease. The fatty acids composition of liver oil from
three species of Lutjanus, such as Lutjanus lutjanus, L. madras and L. vitta were
examined. Fish liver oil was extracted by Bligh and Dyer method, followed by
derivatization of fatty acids to their respective fatty acid methyl esters (FAMEs)
and finally analyzed on gas chromatography-flame ionization detector (GC-FID).
The lipid content of liver tissue from three species of Lutjanus ranged from 1.10%
to 3.60% with the L. lutjanus showed the highest value of lipid. The gas
chromatograms of derivatized fatty acids have showed the most dominant fatty acid
in liver oil was palmitic acid ranged 41.45% to 58.03%. All three species of
Lutjanus studied contain high fraction of unsaturated fatty acid, where
polyunsaturated fatty acids (PUFAs) fraction were >40% of total fatty acids. It can
be concluded that Lutjanus fish can be considered as potential resources for
omega-3, omega-6 and omega-9.
Proceedings of the Aquatic Science Colloquium 2016: Experiences Sharing in Aquatic Science Research IV: Malaysia Exclusive Economic Zone (EEZ) Cruise and other Aquatic Science Research, 2016
The Exclusive Economic Zone (EEZ) along a coastline of Sabah and Sarawak occupying a strategic p... more The Exclusive Economic Zone (EEZ) along a coastline of Sabah and Sarawak
occupying a strategic position in the South China Sea. Fish have been widely used
as bioindicator for heavy metals pollution in marine ecosystem. The pollution
sources are come from agricultural practices, construction, dumping the
untreated sewage and also the oil spilling from the tanker. This situation are
leading to the increasing heavy metals concentration and which then will be intake
by marine organism especially fish. The concentration of the eight heavy metals
(As, Zn, Pb, Cd, Cr, Cu, Ni, Mg) in the four parts of fish namely muscle, gills and
intestine and liver from three species of sharks (Chiliscyllium griseum, C.
plagiosum and C. punctatum) were analyzed using Inductively Couple Plasma
Optical Emission Spectrophotometry (ICP-OES). Fish samples were collected from
the Sarawak EEZ region during the cruises of the SEAFDEC Research Vessel
between 20 August to 3rd October 2015. The concentration (μg/g) of three heavy
toxic metals (As, Pb and Cd) in the muscle of C. plagiosum, C. griseum and C.
punctatum, respectively, were As (0.25, 0.98, 0.23), Pb (not detected (n.d) in all
species) and Cd (0.14, n.d, n.d). While the concentration (μg/g) of three toxic
heavy metals in the liver of C. plagiosum, C. griseum and C.
punctatum,respectively, were As (5.17, 2.39, 2.30), Cd (2.33, 5.98, 15.97) and Pb
(n.d in all species). None of the concentration of toxic heavy metals in the muscles
and livers exceeded the standard guideline values and hence would not pose any
health hazard to consumers. Distrubution of other metals (Zn, Cr, Cu, Ni and Mg)
muscle and liver parts, as well as distribution of all metals analysed in unedible
parts (gills and intestine) were also reported. The heavy metal concentration is
varied significantly between different parts of the same fish species.
Proceedings of the Aquatic Science Colloquium 2016: Experiences Sharing in Aquatic Science Research IV: Malaysia Exclusive Economic Zone (EEZ) Cruise and other Aquatic Science Research, 2016
Groupers are keystone species, generally targeted by small scale artisanal fisheries, sports fis... more Groupers are keystone species, generally targeted by small scale artisanal fisheries, sports
fishing groups and aquaculturists. Reduction in population size may happen over time
leading to inbreeding which affect the overall health of the population. Despite the
importance of groupers as one of the commercial landings in Sarawak, genetic baseline
data on grouper populations inhabiting Sarawak waters is still unavailable. Therefore, this
study aims to carry out genetic analysis on six banded grouper collected during fisheries
resource survey in 2014, along coastal areas of Tanjung Sirik to Tanjung Kidurong, Bintulu
Sarawak, using standard molecular biology techniques. A total of 517 bp of Cytochrome
Oxidase I (COI) gene had been sequenced and matched E. sexfasciatus with accession
number KJ594989 in GenBank. Out of 15 individuals, eleven haplotypes were recorded,
with relatively high haplotype diversity (0.93). Genetic divergence values among samples
ranged between 0 to 0.97%, confirming all samples from one species. Both Neighbour
Joining and Maximum Parsimony phylogenetic trees shown the same tree topology,
concluding the monophyly of E. sexfasciatus from Sarawak waters with strong support of
100 % bootstrap value. These genetic baseline data suggest that the grouper populations in
the areas are healthy and hopefully this resource could be used in a sustainable and
responsible manner in future.
Proceedings of the Aquatic Science Colloquium 2016: Experiences Sharing in Aquatic Science Research IV: Malaysia Exclusive Economic Zone (EEZ) Cruise and other Aquatic Science Research, 2016
Current studies on marine mollusc distribution and diversity were only focused on the intertidal... more Current studies on marine mollusc distribution and diversity were only focused on
the intertidal area rather than subtidal area. Therefore, the objective of this study
is to study the community structure of the gastropod and bivalves at the Malaysia
Exclusive Economic Zone (EEZ) of Sarawak waters. The gastropod and bivalves
samples were collected using a grab sampler (Smith-McIntyre grab). The samples
were identified to the species level with the aid of stereo microscope. The total
species number found in this study was 95. The total species number of gastropods
and bivalves was 61 and 34, respectively. Species diversity of gastropod and
bivalve was between 1.223 to 2.959 bits/individual. For species evenness, the
highest value was recorded at station 8 and the lowest was at station 13 with
0.938 and 0.650, respectively. Meanwhile, the highest value of species richness
was recorded at station 26 (6.995) and the lowest was recorded at station 16
(1.248). The findings of the gastropod and bivalve study at Malaysia EEZ of
Sarawak waters contribute to the future management of the area.
Proceedings of the Aquatic Science Colloquium 2016: Experiences Sharing in Aquatic Science Research IV: Malaysia Exclusive Economic Zone (EEZ) Cruise and other Aquatic Science Research, 2016
Information on ichthyoplankton (fish eggs and larvae) is crucial to determine the fish recruitme... more Information on ichthyoplankton (fish eggs and larvae) is crucial to determine the
fish recruitment and breeding area in the natural habitats. To date,
ichthyoplankton baseline data within 5 to 12 nautical mile zone in Sarawak are
still lacking and nothing can be inferred about the importance of this zone for the
fish early life stage. Hence, this study was conducted to obtain the composition of
fish larvae community from Tanjung Sirik to Tanjung Datu, Sarawak waters. In
2014, three separate samplings covering 26 stations (5 – 7 July, 8 – 10 October
and 11 – 12 November) were performed. Plankton net (0.5 mm mesh size)
attached with a flowmeter was towed obliquely by a trawler boat to collect
ichthyoplankton during second and third samplings but pump method was used in
the first sampling. In this survey, a total of 568 fish larvae and 2,299 fish eggs
were obtained. The fish larvae samples comprise seven orders and consist of 16
families, namely Bothidae, Carangidae, Clupeidae, Cynoglossidae, Engraulidae,
Ephippidae, Gobiidae, Hemiramphidae, Leiognathidae, Mugilidae, Mullidae,
Ophichtidae, Pristigasteridae, Sciaenidae, Scombridae and Syngnathidae. Among
these families, the top three dominant families were Clupeidae, Gobiidae and
Engraulidae. The mean density of fish larvae and fish eggs at Muara Sadong to
Tanjung Datu area were 6.9 ± 6.4 FL/100 m3 and 27.6 ± 52.9 FL/100 m3,
respectively. However, these densities cannot be determined for Tanjung Sirik to
Muara Sadong area due to sampling approach limitation. These baseline data are
hoped to be useful for future fish stock management in Sarawak waters.
AACL Bioflux, 2022
The study explained the morphometric (length, L-weight, W) relationship (W=aL b) and the spawning... more The study explained the morphometric (length, L-weight, W) relationship (W=aL b) and the spawning season of anchovy and sardine sampled from the coastal waters of Lawas, Sarawak in 2017 until 2018. In the study, the dominant species of anchovy and sardine in Lawas waters were initially determined, which were Encrasicholina devisi and Sardinella fimbriata. The length-weight relationship was estimated via the FiSAT program, while the spawning season was discovered through ovary examination. The total length (TL) ranged from 4.2 cm-8.9 cm and 10.07 cm-14.60 cm for E. devisi and S. fimbriata respectively. The length-weight relationships were given by W = 0.005846L 3.0134 , r 2 = 0.8 for E. devisi while W = 0.07663L 2.1028 , r 2 = 0.71 for S. fimbriata. The asymptotic length (L∞) was estimated at 7.61 cm, growth coefficient (K) was 1.10 yr-1 , total mortality (Z) was 4.48 yr-1 , natural mortality (M) was calculated as 2.88 yr-1 and fishing mortality (F) was 1.60 yr-1 for E. devisi. On the other hand, S. fimbriata recorded the asymptotic length (L∞) at 15.61 cm, growth coefficient (K) was 0.97 yr-1 , total mortality (Z) was 3.23 yr-1 , natural mortality (M) was calculated as 2.17 yr-1 and fishing mortality (F) was 1.06 yr-1. The females reached the first sexual maturity at a size of 6.0 cm and 13.50 cm total length for E. devisi and S. fimbriata. The major spawning months were estimated to occur in June and November for E. devisi while March and July for S. fimbriata. The information obtained was important as a guideline for the management to establish a fishing regulation for a sustainable fishery in the waters of Lawas.
Borneo Journal of Resource Science and Technology, 2017
Physicochemical characteristics of seawater play crucial role for productive marine ecosystem and... more Physicochemical characteristics of seawater play crucial role for productive marine ecosystem and fisheries activities. The limited information of Sarawak surface seawaters provide objective to determine the physicochemical characteristics in Malaysia Exclusive Economic Zone off the Coast of Sarawak. A total of 38 samples were collected using Van Dorn Waals Sampler and the physicochemical characteristics were measured using physicochemical parameter probes. Ranges for dissolved oxygen (DO) was 3.73-6.83 mg/l, temperature was 27.03-30.13ºC, pH was 7.63-7.82, salinity was 33.77-36.77 ppt, turbidity was 0.01-1.01 NTU, chlorophylla concentration was 0.01-4.52 mg/l, nitrate was 0.01–0.08 mg/l, nitrite was 0.001–0.012 mg/l and phosphate was 0.01–5.95 mg/l. There was positive correlation between chlorophyll-a and nutrients that indicated the biological uptake by biota (e.g. phytoplankton). In conclusion, the present study shows that the Malaysia Exclusive Economic Zone off the Coast of Sar...
The Scientific World Journal, 2017
Sediment distributions in deep sea influence the benthic community structure and thus play an imp... more Sediment distributions in deep sea influence the benthic community structure and thus play an important role in shaping the marine ecosystem. Several studies on sediment characteristics had been conducted in South China Sea (SCS), but only limited to coastal areas of regions within SCS territories. Therefore, this study was carried out to analyze the benthic sediment profile in an area beyond 12 nautical miles off the coast of Sarawak, southern SCS. Sediment samples were collected from 31 stations, comprising three depth ranges: (I) 20–50 m, (II) 50–100 m, and (III) 100–200 m. The total organic matter (TOM) contents were determined and subjected to dry and wet sieving methods for particle size analysis. TOM contents in the deep area (>50 m) were significantly higher (p=0.05) and positively correlated (r=0.73) with silt-clay fraction. About 55% and 82% of stations in strata II and III, respectively, were dominated by silt-clay fractions (<63 μm mean diameter), coherent with TOM...
Tropical Life Sciences Research, 2017
Kajian ini menyediakan senarai gastropod marin yang pertama dari perairan Zon Ekonomi Eksklusif (... more Kajian ini menyediakan senarai gastropod marin yang pertama dari perairan Zon Ekonomi Eksklusif (ZEE) Sarawak. Sampel gastropod dikumpul dari stesen yang terpilih di ZEE Sarawak. Operasi menunda menggunakan pukat tunda dengan saiz regangan 38 mm pada penghujung pukat. Operasi menunda dijalankan di kawasan melebihi 12 batu nautika dari pesisir pantai dan kawasan stesen dibahagi kepada tiga strata kedalaman iaitu, I) 20-50 m, II) 50-100 m dan III) 100-200 m. Sebanyak 23 spesies gastropod telah dikenalpasti sepanjang dua bulan kajian yang bermula dari 16 Ogos hingga 6 Oktober 2015 di mana ia terdiri daripada 8 superfamili, 15 famili dan 20 genus. Superfamili Tonnidae diwakili 7 spesies, diikuti Muricoidea (5 spesies), Cypraeoidea (4 spesies), Buccinoidea dan Conoidea (2 spesies). Manakala lain-lain superfamili hanya diwakili satu spesies sahaja. Didapati hanya 3 spesies berada di 2 strata kedalaman iaitu Melo melo, Murex aduncospinosus dan Tonna galea. Selain daripada itu, didapati 9, 13 dan 4 spesies gastropod dijumpai masing-masing pada strata I, II dan III. Maklumat berkenaan taburan gastropod dengan perbezaan strata kedalaman di ZEE Sarawak sangat berguna dalam pengemaskinian pangkalan data diversiti spesies di Malaysia.
Aacl Bioflux, 2019
The present study describes the morphometric (length, L-weight, W) relationship (W = aL) and dete... more The present study describes the morphometric (length, L-weight, W) relationship (W = aL) and determined the spawning season of Acetes intermedius sampled from the coastal waters of Miri, Sarawak from March 2016 until February 2017. Morphometric measurements for individual shrimp (total length, TL and body weight, BW) were recorded and length-weight relationships were estimated using FiSAT program. The TL range from 15.97 to 40.45 mm and 12.95 to 42.05 mm for males and females Acetes respectively. The average male to female shrimp sex ratio was 1:4.13. The length-weight relationships were given by W = 0.0001869L or Log TW = 1.9232 Log TL – 3.7285, r = 0.75 for both sexes, W = 0.0001685L or Log TW = 1.9578 Log TL – 3.7733, r = 0.76 for female and W = 0.01314L or Log TW = 0.6224 Log TL – 1.8813, r = 0.75 for male. The asymptotic length (L∞) was estimated at 43.20 mm, while the growth co-efficient (K) was 1.20 yr. Total mortality (Z) was estimated at 3.39 yr, the natural mortality (M) w...
Malaysian Fisheries Journal, 2021
Conscious of the importance of the latest fishing technology, the innovation of fishing gears is ... more Conscious of the importance of the latest fishing technology, the innovation of fishing gears is a continuous effort in the fisheries study. As well as the deep-sea trap, a study was conducted in the waters of Miri to determine the construction cost between the conventional and improve deep-sea trap. The study was also done to examine the efficiency of 1-funnel (1F) and innovative (2F) deep-sea trap. The 1F trap is characterised by a 1-funnel entrance, while 2F trap is a 2-funnel entrance trap. A total of 40-unit traps were deployed in this study. Each station was positioned with 2 types of traps and were soaked for 7 days before harvested. The findings suggested that the 2F trap had caught 199 individuals, while 1F trap only caught 140 individuals. Overall, 23 species from 11 families were caught in the 2F trap, however the 1F trap only managed to caught 16 species from 7 families. Moreover, the 2F traps significantly have higher catch effort (CPUE) of 2.61 kg/unit than the 1F trap with CPUE 2.49 kg/unit. The results had revealed that the 2F trap is more efficient than the 1F trap for the development of reef and rock areas fishing and better fishing experience for the local fishermen in the future.
The studies were carried out between 9th July and 3rd August 1996 (3rd cruise) and 30th April and... more The studies were carried out between 9th July and 3rd August 1996 (3rd cruise) and 30th April and 30th May, 1997 (4th cruise) in the Exclusive Economic Zone of Sarawak and the western part of Sabah. The species distribution, abundance, composition and length-weight relationships of some commercially important fish were investigated and compared for both cruises. The results indicates that the overall catch rate ranged from 3.5 to 194 kg/hr and averaged at 55.9 kg/hr during the 3rd cruise. For the 4 cruise, it ranged from 10.9 to 90.5 kg/hr and averaged at 50.2 kg/hr. During the 3 cruise, 46.9% of the catch were dominated by demersal fish followed by 41.6% trash fish, 7.8% pelagic fish and 3.1% cephalopod. Priacanthidae was the most dominant family, which made up of 14.1% of the catch followed by Nemipteridae (10.8%), Carangidae (5.0%), Lutjanidae (3.7%) and Mullidae (2.1%). The ten most dominant species found during the 3rd cruise were 1. Priacanthus macracanthus (13.2%), 2. Nemipte...
Hak Cipta Terpelihara. Tidak dibenarkan mengeluar ulang manamana bahagian artikel, ilustrasi dan ... more Hak Cipta Terpelihara. Tidak dibenarkan mengeluar ulang manamana bahagian artikel, ilustrasi dan isi kandungan buku ini dalam apa juga bentuk dan dengan apa jua sama ada secara elektronik, fotokopi, mekanik, rakaman atau cara lain sebelum mendapat izin daripada Institut Penyelidikan Perikanan (FRI) Bintawa. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means without prior consent in writing of Fisheries Research Institute Bintawa (FRIB).
This book will explain the design characteristics, operation, catch and recommendation of each fi... more This book will explain the design characteristics, operation, catch and recommendation of each fishing gear of Acetes in Sarawak.
This Standard Operating Procedure (SOP) will provide a standard guideline on artificial reefs ope... more This Standard Operating Procedure (SOP) will provide a standard guideline on artificial reefs operations including data collections and analysis.
This SOP was published for the data collection and analysis of oceanic tuna as a guideline and re... more This SOP was published for the data collection and analysis of oceanic tuna as a guideline and reference to the researchers in the field.
This SOP is the first part for conducting Capture Fisheries Bio-socioeconomic study. It includes ... more This SOP is the first part for conducting Capture Fisheries Bio-socioeconomic study. It includes guidelines and reference of data collection and analysis methods to determine the current socioeconomic status as well as to study the profile parameters and income of fishermen operating in Zone A to Zone C2 along the waters of Sarawak.
Prosedur Operasi Standard (SOP) ini akan memberikan garis panduan untuk melaksanakan kajian terut... more Prosedur Operasi Standard (SOP) ini akan memberikan garis panduan untuk melaksanakan kajian terutamanya dari segi pengumpulan dan analisa data di tukun tiruan.
Prosedur Operasi Standard (SOP) ini diterbitkan sebagai panduan dan rujukan kepada penyelidik di ... more Prosedur Operasi Standard (SOP) ini diterbitkan sebagai panduan dan rujukan kepada penyelidik di lapangan untuk pengumpulan dan analisis data bagi tuna oseanik.
Prosedur Operasi Standard (SOP) ini merupakan bahagian pertama dalam menjalankan kajian Bio-sosio... more Prosedur Operasi Standard (SOP) ini merupakan bahagian pertama dalam menjalankan kajian Bio-sosioekonomi Perikanan Tangkapan. Ia merangkumi panduan dan rujukan kaedah pengumpulan dan analisis data untuk menentukan status sosio-ekonomi semasa serta mengkaji parameter profil dan pendapatan nelayan yang beroperasi di Zon A hingga Zon C2 di sepanjang perairan negeri Sarawak.
Pamphlet, 2022
Pukat Hanyut merupakan sejenis peralatan penangkapan ikan, udang dan ketam dengan menggunakan isi... more Pukat Hanyut merupakan sejenis peralatan penangkapan ikan, udang dan ketam dengan menggunakan isi jaring yang diikat pada dua tali, atas dan bawah.
Pamphlet, 2022
Payao (dalam Bahasa Filipina) juga dikenali sebagai unjam merupakan sebuah struktur binaan yang d... more Payao (dalam Bahasa Filipina) juga dikenali sebagai unjam merupakan sebuah struktur binaan yang dilabuhkan di dalam air bertujuan menarik perhatian ikan tuna untuk berkumpul di sesuatu lokasi. Payao juga diistilah sebagai Peranti Pengumpul Ikan atau Fish Aggregating Device (FAD). Tujuan utama payao dilabuhkan adalah untuk mengumpul kawanan dan populasi ikan ke sesuatu kawasan. Kewujudan struktur payao di dalam air menjadi tempat tinggal semulajadi (habitat) untuk ikan kecil dan ikan pemangsa (tuna). Payao laut dalam umumnya dilabuhkan untuk mengumpul ikan-ikan pelagik seperti Ikan Tuna
Poster, 2022
Rajah 1. Peta kawasan kajian tukun tiruan di perairan Mukah, Sarawak Jadual 1. Hasil pemantauan s... more Rajah 1. Peta kawasan kajian tukun tiruan di perairan Mukah, Sarawak Jadual 1. Hasil pemantauan sumber perikanan di tukun tiruan di perairan Mukah tahun 2021 dan 2022
Poster, 2022
Pada 17 Julai 2022, sebanyak dua (2) unit payao laut dalam telah dilabuhkan di perairan Miri, Sar... more Pada 17 Julai 2022, sebanyak dua (2) unit payao laut dalam telah dilabuhkan di perairan Miri, Sarawak oleh pihak Cawangan Sumber Marin, FRI Bintawa dengan kerjasama daripada pihak Jabatan Perikanan Laut Sarawak (JPLS).
Pamphlet, 2022
Kaedah memancing dijalankan selama 1 jam sebelum aktiviti selaman skuba bagi mengurangkan ganggua... more Kaedah memancing dijalankan selama 1 jam sebelum aktiviti selaman skuba bagi mengurangkan gangguan terhadap ikan.