Yusli Wardiatno | Bogor Agricultural University, Indonesia (original) (raw)

Papers by Yusli Wardiatno

Ammonia concentration of catfish culture wastewater underwent reduction up to 90.73% under vetive... more Ammonia concentration of catfish culture wastewater underwent reduction up to 90.73% under vetiver treatment. Length and weight range of catfish under vetiver treatment was higher than that of without vetiver. Similarly, survival rate of catfish at vetiver treatment was higher compared with that at the control. Vetiver was able to remove ammonia and grow under recirculating system of catfish culture by utilizing nutrient resulted from organic substance decomposition of uneaten fish food, feces, and urine. Nitrate and total phosphate concentration remained high at the end of experiment (third week) denoting that decomposition process has still been taking place.

Increasing fish cultivation activity triggers negative impact on the environment. An effort likel... more Increasing fish cultivation activity triggers negative impact on the environment. An effort likely applied to cope with this problem is phytoremediation with aquaponics system. Aims of this study were to process organic waste from the cultivation of gouramy, and then the processed waste is utilized as a medium for growing romaine lettuce in recirculation systems and to compare the effectiveness of hydroponics-aquaponics recirculation system on romaine lettuce growth. Organic waste such as feed residuals and feces from the cultivation of gouramy could be processed with phytoremediation by romaine lettuce. The organic material after the process of decomposition could be utilized for romaine lettuce growth. Final weight of romaine lettuce was 90.16 ± 13.3 g for P4 (hydroponics), 89.4 ± 7.4 g for P2 (aquaponics with 10 romaine lettuce), and 85 ± 11.5 g for P3 (aquaponics with 20 romain lettuce). The highest daily growth (DGR) and relative growth (RGR) were P4 (hydroponics) of 0.056 ± 0.001 cm/day and 0.007 ± 0.002 g/day, respectively. Organic waste from the cultivation of gouramy can be processed with phytoremediation by romaine lettuce. Organic materials such as feed residuals and feces after the process of decomposition can be utilized for romaine lettuce growth. Meanwhile the highest daily growth (GR), specific growth (SGR) and survival rate (SR) of gouramy were P2 (aquaponics with 10 romaine lettuce) at 7.43 ± 1.77g/fish/day, 1.26 ± 0.12%/day, 100%, respectively. However, the best feed conversion ratio (FCR) was P3 (aquaponics with 20 romaine lettuce) of 0.59 ± 0.28.

Policy management of turtle conservation in the region of Venu Island Wildlife Sanctuary, Kaimana... more Policy management of turtle conservation in the region of Venu Island Wildlife Sanctuary, Kaimana, West Papua is indispensable. Therefore, this study aimed at examining the turtle conservation policy and it's implementation, both the consistency and coherence. The analytical method used is content analysis and simple mathematic statistics. The consistency of turtle conservation management policies is found inconsistent in implementation. Similarly, coherence between the policy on turtle conservation management with government policy is found incoherent, as it is more oriented to "economic growth" compared to turtle conservation management. This is due to weak management, among others: communication, resources, attitudes and behavior, and bureaucratic structures. "Management Authority Multi-stakeholder" was found as a form of the collaborative approach in carrying out the turtle conservation among institutional managers with other key stakeholders. Consolidation of these institutions need to be carried out by non-governmental organizations, i.e. Conservation International (Indonesia) Corridor Kaimana and local government, i.e. the Department of Marine and Fisheries, Department of tourism and culture along with Indigenous Peoples. So policy integration among sectors as well as the consistency and coherence should be coherent in the approach to building synergy with policies of sustainable management of turtle conservation in the region of Venu Island Wildlife Sanctuary, Kaimana, West Papua.

Cendrawasih Bay is famous as a habitat of whale shark. One of the main foods of the whale shark i... more Cendrawasih Bay is famous as a habitat of whale shark. One of the main foods of the whale shark in the bay is the blue-pigmented calanoid copepods. The presence of the blue-pigmented copepod has never been reported in Indonesia. This study was aimed to report the occurrence of a blue-pigmented calanoid copepod (Acrocalanus sp.) from Cendrawasih Bay, Papua as new record. The specimens were collected by means of bongo net, and preserved with 5% sea-buffered formaldeyide. Sample collection was conducted from October to December 2016. Morphological characters of the species are illustrated and described. This finding enhances marine biodiversity list of micro-crustacean in Indonesia, and add more distribution information of the species in the world.

ABSTRAK Status perikanan rajungan di Teluk Lasongko saat ini telah overfishing dan kritis, sehing... more ABSTRAK Status perikanan rajungan di Teluk Lasongko saat ini telah overfishing dan kritis, sehingga perlu dikelola dengan baik. Makalah ini bertujuan untuk menentukan potensi dan permasalahan keberlanjutan pemanfaatan rajungan serta menyusun strategi pengelolaan rajungan di Teluk Lasongko berdasarkan pada aspek bioekologi. Data ekobiologi dikumpulkan sejak tahun 2006, dan 2013 sampai 2014 di Teluk Lasongko. Hasil penelitian menunjukkan potensi dan keberlanjutan pemanfaatan perikanan rajungan di Teluk Lasongko tergolong tinggi. Permasalahan yang timbul yang mengancam keberlanjutan rajungan adalah overfishing, penangkapan rajungan berukuran kecil dan rajungan betina ovigerous, daerah penangkapan rajungan yang tidak merata, dan kegiatan perikanan yang tidak ramah lingkungan. Beberapa strategi pengelolaan harus dilakukan untuk mendukung dan memastikan pengelolaan berkelanjutan rajungan di Teluk Lasongko, yaitu penetapan ukuran terkecil yang boleh ditangkap (untuk jantan >109,8 mm-CW dan betina >115,7 mm-CW), pelarangan penangkapan rajungan betina ovigerous, dan mengurangi upaya penangkapan dengan bubu sampai 50%. Selain itu, restocking dan pembentukan suaka rajungan juga harus dilakukan. Kata Kunci: Crustacea; pemanfaatan berkelanjutan; pengelolaan pesisir; perikanan rajungan; Portunidae ABSTRACT The status of blue swimming crab (Portunus pelagicus) fishery in Lasongko Bay is detected overfishing and critical, so it needs to be managed properly. This paper was aimed to determine the potential and problems of sustainability use of the crab and establish strategic management based on bioecology aspects. Bioecological data on the crab were collected in 2006, and from 2013 to 2014 in Lasongko Bay. Research result of indicated high potential and sustainable of use of crab fishery in the bay. Arising problems to threat the sustainability were over-fishing, small size crab and ovigerous female catch, localized fishing ground, and unfriendly environmentally fishing activities. Some management strategies must be done to support and ensure the sustainability management of the crab in Lasongko Bay, i.e. the minimum legal size (for males >109.8 mm-CW and females >115.7 mm-CW), not catching ovigerous female crabs, and reducing use of traps up to 50%. Restocking and establishing crab sanctuary could be also important to enhance the aforesaid management strategies.

The purpose of this study was to determine the typology, seagrass ecosystem function and services... more The purpose of this study was to determine the typology, seagrass ecosystem function and services that are useful for human well-being. This research was conducted by using literatures survey of some scientific documents and analyzed qualitatively and described to obtain a comprehensive overview in accordance with purposes of this research. The results of this study shows that seagrass ecosystem provides the benefits of ecosystem services are valuable and needed humans to meet their needs and well-being, both ecologically, socially, and economically. Those ecosystem services include the following: (i) provisioning services that one of them shown by the production of a protein source necessary for mandkind, (ii) regulating services, one of which is shown by role of seagrass in maintaining the stability of white sand beaches from abrasion, (iii) cultural services, one one which is shown by the role of seagrass in making the surrounding area as a place for recreation, especially recreational fishing, and (iv) supporting services, one of which is shown by the role of seagrass in the process of supplying oxygen and nutrient cycling in the waters of the needs of fish and biota surrounding. All the ecosystem services provided to be a source of life and livelihood are needed to meet the people’s welfare.

This work presents the diversity of lobsters collected from a survey in Palabuhanratu Bay, South ... more This work presents the diversity of lobsters collected from a survey in Palabuhanratu Bay, South of Java, Indonesia during July 2015 – December 2016. The survey was conducted monthly in a fish harbour. Information on the occurrence of previous survey was also included. A total of thirty one lobster specimens were collected from fishermen. Twelve species of three families were recorded from the survey, i.e. family Palinuridae [Panulirus ornatus (, and family Nephropidae [Metanephrops andamanicus (Wood-Mason, 1891)]. The habitus photographs are presented and biological information of the lobsters are described. Among the twelve species, the occurrence of Panulirus ornatus, P. polyphagus, and Parribacus antarcticus, is reported as new distribution record in south of Java, Indonesia. Brief notes on the fishery point of view and the importance of diversity research for sustainable life are discussed.

Wahyudin RA, Wardiatno Y, Boer M, Farajallah A, Hakim AA. 2017. Short Communication: A new distri... more Wahyudin RA, Wardiatno Y, Boer M, Farajallah A, Hakim AA. 2017. Short Communication: A new distribution record of the mud-spiny lobster, Panulirus polyphagus (Herbst, 1793) (Crustacea, Achelata, Palinuridae) in Mayalibit Bay, West Papua, Indonesia. Biodiversitas 18: 780-783. Panulirus polyphagus (Herbst 1793) (Crustacea, Decapoda, Achelata, Palinuridae) from Waigeo Island is illustrated and described in detail of morphological characters. This species is reported as new distribution record from Mayalibit Bay, Raja Ampat District, Province West Papua, Indonesia. One specimen was collected by local fisherman from muddy substrate waters at a depth of 10-40 m. The collection was made in June 2016. The present study adds more distribution of species in the world and enhances the marine diversity of Indonesian crustacean lists. Some brief biological information on the species is presented.

The main problem of coastal waters in Indonesia is generally caused by anthropogenic activities t... more The main problem of coastal waters in Indonesia is generally caused by anthropogenic activities that promoting the accumulation of organic matters in sediments. It was well-known that organic matters in sediment might influence the macrozoobenthic communities. AMBI and M-AMBI are two recent developed indices which could be used to evaluate the health of soft bottom macrozoobenthic community and their ecological quality status. This present study was aimed to compare and evaluate the ecological status of macrozoobenthic communities in Tangerang coast (northern part of Java) and Palabuhanratu Bay (southern part of Java) based on AMBI and M-AMBI indices. This study was conducted in April-May 2013 in Tangerang coastal area, and in May 2016 in Palabuhanratu Bay. There are 18 sampling sites in the Tangerang coast, and 30 sampling sites in Palabuhanratu Bay. The results showed that the disturbance level of macrozoobenthos community in Palabuhanratu Bay based on AMBI analysis ranged from undisturbed to slightly disturbed, while in Tangerang coastal waters ranged from undisturbed to moderate disturbed. Ecological quality status based on the M-AMBI ranged from poor to high for both locations. The AMBI and M-AMBI indices showed that benthic environment in Palabuhanratu Bay was ecologically better than that inTangerang coastal waters.

The spiny lobster, Panulirus femoristriga Von Martens, 1872 (Crustacea Achelata Palinuridae), is ... more The spiny lobster, Panulirus femoristriga Von Martens, 1872 (Crustacea Achelata Palinuridae), is reported for the first time from Celebes and
Seram Islands, Indonesia. Three specimens were captured by hand by
local fishermen on coral reefs in June 2016. Its morphological characters, habitat and distribution are reported.

Pearl oyster is one of marine organisms which has high of economic value. One of Indonesia region... more Pearl oyster is one of marine organisms which has high of economic value. One of Indonesia region that potential for pearl oyster farming activity is Semau Strait-East Nusa Tenggara. The purpose of this study is mapping and characterize spatial distribution based on biophysics chemistry condition of pearl oyster farming. Mapping using Geographic Information System (GIS) tools, while grouping and characterize using hierarchical clustering and Mann-Whitney method. Grouping based on character similarity of biophysics chemistry divided the stations distribution into three groups: Group I is excellent group, Group II is good group and Group III is bad group for pearl oyster farming. Group I is excellent area because it has the highest values of dissolved oxygen, chlorophyll-a, and phytoplankton abundance. Group III is bad area because it temperature is high relatively.

Horseshoe crab is an important component of macro-benthos communities in the fine sand or mud sub... more Horseshoe crab is an important component of macro-benthos communities in the fine sand or mud substrate in coastal waters, both in the tropical and temperate region. This primitive animal consists of four species in the world, and three species can be found di Asian region, including Indonesia, namely Tachypleus tridentatus, T. gigas, and Carcinoscorpius rotundicauda. Scientific information about species distribution of three Asian horseshoe crab in Indonesia is limited, also about morphometric characters. This study aims to determine the morphometric characters and species distribution of three Asian horseshoe crab in north coast of Java and south coast of Madura Island. This study was conducted on July-August 2016. The total number of three Asian horseshoe crab obtained in this study was 260 individuals, distributed along north coast of Java and south coast of Madura Island, respectively 176 individuals of C. rotundicauda, 35 individuals of T. tridentatus, and 49 individuals of T. gigas. Tachypleus gigas has the largest size and widest class interval among three Asian horseshoe crab species. Morphometric characters is differences among three Asian horseshoe crab species. Carapace width and telson length were not significantly different among sampling locations only in T. tridentatus.

Benthic macroinvertebrates are commonly used in river health biomonitoring. In monitoring program... more Benthic macroinvertebrates are commonly used in river health biomonitoring. In monitoring program biotic indices are now widely established in water quality monitoring around the world, including in the tropical countries. The aim of this study was to reveal the ecological status of Cisadane River’s headwaters in inside and outside of Mount Halimun-Salak National Park by using benthic macroinvertebrates. The research was conducted in the headwaters of Cisadane River located in Mount Halimun-Salak National Park. Macroinvertebrates were collected from four sites, i.e. inside the park (station 1, 2, 3, and 4) and from two sites outside the park (station 5 and 6). Collections were made twice a month, starting from April to June 2015 by means of Surber sampler (frame area 30x30 cm). A total of 65 genera from 38 families and 11 orders were found in the river. The results showed that based on
diversity index, Lincoln Quality Index (LQI), Family Biotic Index (FBI), and Stream Invertebrate Grade Number Average Level 2 (SIGNAL 2), stations located within national park were ecologically better than those outside national park. Rivers with well-preserved riverside vegetation, as in the national park area have greater ecological status.

The surface sediments were identified from west part of Java Sea to evaluate spatial distributio... more The surface sediments were identified from west part of Java Sea to evaluate spatial distribution and ecological risk potential of heavy metals (Hg, As, Cd, Cr, Cu, Pb, Zn and Ni). The samples were taken from surface sediment (<0.5 m) in 26 m up to 80 m water depth with Eikman grab. The average material composition on sediment samples were clay (9.86%), sand (8.57%) and mud sand (81.57%). The analysis showed that Pb (11.2%), Cd (49.7%), and Ni (59.5%) exceeded of Probably Effect Level (PEL). Base on ecological risk analysis, Cd (:300.64) and Cr (:0.02) were categorized to high risk and low risk criteria. The ecological risk potential sequences of this study were Cd>Hg>Pb>Ni>Cu>As>Zn>Cr. Furthermore, the result of multivariate statistical analysis shows that correlation among heavy metals (As/Ni, Cd/Ni, and Cu/Zn) and heavy metals with Risk Index (Cd/Ri and Ni/Ri) had positive correlation in significance level p<0.05. Total variance of analysis factor was 80.04% and developed into 3 factors (eigenvalues >1). On the cluster analysis, Cd, Ni, Pb were identified as fairly high contaminations level (cluster 1), Hg as moderate contamination level (cluster 2) and Cu, Zn, Cr with lower contamination level (cluster 3).

Variation in morphometric characters in four sand crab (Albunea symmysta) populations from four i... more Variation in morphometric characters in four sand crab (Albunea symmysta) populations from four intertidal areas in Sumatra (Aceh and Bengkulu) and Java (Cilacap and Yogyakarta) were studied. Crabs collected from the four sites were measured to obtain 10 morphometric characters, i.e., carapace length (CL), carapace width (CW), ocular peduncle length and width (LOP and WOP), telson length and width (LT and WT), merus length (ML), carpus length (CaL), propodus length (PL), and dactylus length (DL). Allometric relationships were established among three morphometric characters (CW, PL, and DL) for each site, in which CL was fixed on the abscissa as a reference variable. The analysis of covariance showed that population from Yogyakarta had a greater carapace width and the Aceh population had a longer dactylus length. In terms of propodus length, the Aceh population had a longer dactylus length than the Bengkulu population. Two group populations were detected by cluster analysis with 10 morphometric characters, i.e., the Sumatra population and the Java population.

Research on the stock status and exploitation of the blue swimming crab Portunus pelagicus (Linna... more Research on the stock status and exploitation of the blue swimming crab Portunus pelagicus (Linnaeus 1758) in Lasongko Bay was conducted from April 2013 to March 2014. Blue swimming crabs were sampled monthly using gillnets and traps. Data on the number of
fishermen and crab fishing gear were obtained via census and from secondary data and were analysed descriptively for every sampling period. Total catches of crabs were analysed using one-way ANOVA and t-test at p= 0.05. The status of crab stock was analysed using a Beverton–Holt model. The results showed that the number of fishing gear increased rapidly from 2006 to 2014, but was not proportional to the increases in crab catches, while the number of fishermen
declined. The number of fishing gear and catch in 2006 and 2014 were 2,670 and 15,355 units and 44,194.56 kg and 66,926.6 kg, respectively. Daily crab catch were significantly different between the months. Crab stocks have been overfished and are currently considered critical, and
thus the implementation of effective management is necessary.

– Cherax quadricarinatus (von Martens) (Decapoda: Astacidea: Parastacidae) is commercially exploi... more – Cherax quadricarinatus (von Martens) (Decapoda: Astacidea: Parastacidae) is commercially exploited and has been intentionally introduced to various tropical and subtropical countries. Once established in the wild, it frequently becomes invasive. In Indonesia, this crayfish is native only to the southern part of the Papua Province. Cherax quadricarinatus is produced in semi-intensive farms for food as well as for ornamental purposes on most of Indonesian territory. We present here the first record of this species from Java, where this crayfish has formed at least two established feral populations. In total, eight subadult and adult crayfish of both sexes were captured in two natural lakes in the city of Bogor, West Java Province. Based on climate match, we suggest that C. quadricarinatus has high potential to become established within most of Indonesian territory. As a rapidly growing species with broad tolerance to varying environmental conditions, its spread is expected and it should be viewed as a possible threat to native decapod crustaceans. Detailed monitoring is therefore needed. Keywords: crayfish / biological invasion / redclaw / climate match / Parastacidae Résumé – Cherax quadricarinatus (von Martens) a envahi le territoire indonésien à l'ouest de la ligne de Wallace : preuves à Java. Cherax quadricarinatus (von Martens) (Décapode : Astacidé : Parastacidé) est exploitée commercialement et a été introduite intentionnellement dans divers pays tropicaux et subtropicaux. Une fois établie dans la nature, elle devient souvent invasive. En Indonésie, cette écrevisse est originaire seulement de la partie sud de la province de Papouasie. Cherax quadricarinatus est produite dans des exploitations semi-intensives pour la consommation, ainsi que pour des fins ornementales sur la plupart des territoires indonésiens. Nous présentons ici le premier signalement de cette espèce à Java, où cette écrevisse a formé au moins deux populations sauvages établies. Au total, huit subadultes et adultes d'écrevisses des deux sexes ont été capturés dans deux lacs naturels dans la ville de Bogor, province de Java Ouest. Basés sur les conditions climatiques, nous suggérons que C. quadricarinatus a un fort potentiel pour s'établir dans la plupart des territoires indonésiens. Comme c'est une espèce à croissance rapide avec une large tolérance aux conditions environnementales variables, sa propagation est attendue et elle doit être considérée comme une menace possible pour les crustacés décapodes indigènes. Une surveillance étroite est donc nécessaire. Mots clés : écrevisse / invasion biologique / écrevisse bleue / climat / Parastacidés

Information about reproductive biology is significantly needed in management of blue swimming cra... more Information about reproductive biology is significantly needed in management of blue swimming crab (Portunus pelagicus) fishery. This research informs spatial and temporal sex ratio, gonadal development, gonado somatic index (GSI) and first size sexual maturity of male and female crab, as well as crab spawning season in Lasongko Bay, Southeast Sulawesi. Crab collection were conducted with gillnet in five different types of habitat. Gonadal development of crab was examined by their color and morphological characters. Sex ratio was analyzed of χ 2 test, and gonadal development proportion of male and female crabs were described. Gonado somatic index (GSI) among stations were analyzed by one-way ANOVA and followed by Tukey's test. Sex ratio of crabs spatially and temporally of generally did not differ significantly from 1:1. Gonad developments of male and female crab were varied spatially and temporally. GSI at every gonad development stage of male and female crabs generally was not significantly different among stations. GSI of male crab was smaller than the female crab. The first sexual maturity size of male and female crabs were 109.8 mm carapace width (CW) and 115.7 mm CW, respectively. The crab spawned in Lasongko Bay the whole year, and three peaks of spawning season were detected.

The distribution, body size, and egg diameter and volume of ovigerous blue swimming crabs, Portun... more The distribution, body size, and egg diameter and volume of ovigerous blue swimming crabs, Portunus pelagicus, were examined according to habitat type and egg color in Lasongko Bay, Central Buton, Indonesia between April 2013 and March 2014. Ovigerous female crabs were sampled using gillnets and traps at seven stations. Based on the results, the ovigerous female crabs with yellow to dark gray eggs were found over a range of depths from 0.35 to 31.0 m, on sandy to muddy substrate, and in sea bottom covered by seagrass and in bare areas. The carapace widths of the ovigerous female crabs varied significantly between the types of habitat, egg color, and season. Wet weight, diameter, and volume of eggs increased by 36.35%, 25.16%, and 91.76%, respectively, with embryonic development, while the dry weight of eggs decreased by 1.86%. Ovigerous blue swimming crabs with different levels of embryonic development showed a wide habitat distribution from shallow to deeper waters.

Ciambulawung River is used for micro-hydro power plant (capacity 10.000 Watt). The purpose of thi... more Ciambulawung River is used for micro-hydro power plant (capacity 10.000 Watt). The purpose of this study was to determine the water quality status of Ciambulawung River by applying Water Pollution Index and NSF-WQI. The pollution index ranged 0.56 – 0.78 and NSF WQI ranged 87 – 88. Hence the river water quality was considered good. Based on pollution index and NSF WQI index it is concluded that communities living along river bank and micro-hydro power plant do not negatively affect the water quality of Ciambulawung River.