Length-weight relationship of marine fishes from Palawan, Philippines (original) (raw)
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Journal of Applied Ichthyology, 2018
Summary Selected fish were measured on markets along the Davao Gulf, Philippines between 2009 and 2016, augmenting the number of Length-Weight relationships (LWR) published earlier for the same area. LWRs were calculated for 28 fishes including those of 12 firstly reported, rare species. SL-TL and SL-FL relationships were determined for 28 and 25 species (also including 8 and 12 newly reported relationships, respectively). Minimum size at which individuals start developing forked tails are provided for Cheilinus fasciatus (SL = 15.0 cm), Plectorhinchus polytaenia (SL = 27.0 cm), Pseudobalistes flavimarginatus (SL = 18.0 cm) and Thalassoma hardwicke (SL = 11.5 cm). The flatfish Psettodes erumei had a right-left eyed ratio of 0.55.
Species Composition and Length-Weight Relationship of Fishes in Tigum River, Iloilo, Philippines
The Philippine journal of science, 2020
The present study determined the fish species composition and described the length-weight relationship (LWR) of fishes in Tigum River, Iloilo, Philippines from April 2015 to March 2016. Ten (10) fish species from eight families were identified-with Poecilia sphenops as the most numerous (47.0%), followed by Oreochromis niloticus (38.2%). Linear regression analyses of the LWR showed a significant relationship between length and weight of fish-with r 2 greater than 0.9 for the seven of the 10 fish species sampled-indicating that fish weight may be predicted from the length, at least within the range of the fish lengths recorded.
International Journal of Fisheries and Aquatic Studies , 2019
At present, no study had been conducted on the species composition, relative abundance, Catch Per Unit Effort and Length-Weight Relationship of the most common caught by handline in Puerto Princesa Bay as confirmed by the paucity of published literature. Hence this study was realized. About 16 species were identified in this study and Scolopsis taeniopterus was the most common species. This species has an isometric growth. The catch per unit effort varies daily, depending on the condition of the weather. It is recommended to conduct the same study on the other part of the bay using different fishing gears to collect more species from the bay. Also, a year round sample collection to provide a comprehensive data for the size structure of S. taeniopterus. On the other, hand gonadosomatic index, hepatosomatic index and fecundity of this species in Puerto Princesa Bay.
International Journal for Fisheries and Aquatic Studies, 2019
The growth pattern and size of oilfish, Ruvettus pretiosus landed in the Southwestern Coast, Surigao del Norte, Philippines were studied from February to April 2019. A total of 157 samples were recorded with a mean total length and weight of 77.79±0.93 cm and 5344±2296 g, respectively. The total length of the samples ranged from 53.3 to 107.3 cm. The class interval of 70-74.9 cm obtained the highest frequency of 28 individuals. The relationship between length and weight of the oilfish resulted to a negative allometric growth (b = 2.8162; r 2 = 0.9674) with an established equation of Log W = Log 0.0239 + 2.8162 Log L. This study concludes that there was a decrease in size composition of the oilfish species in the study area.
Annals of Tropical Research
There is paucity of studies relating to fish corral fishery and its management particularly those operated on reef flats. This study was conducted to evaluate the fish catch composition of fish corrals situated in the reef flat of Palompon, Leyte from July 2009 to January 2010. During the monitoring, two sets of data were utilized: the semimonthly field intercept samplings and the daily fish landing data. Field intercept samplings enabled the researchers to approach fishers as they were gathering their fish catch that was eventually identified, sorted, measured, and weighed. Fish landing data recorded by local enumerators included the fish’s local name and corresponding weight. From 27 fish corrals, the intercept samplings yielded a total catch of 23.9 kg, which was composed of 81 identified species under 47 genera from 31 families. The most abundant family was Siganidae comprising 44% of the total catch, followed by Apogonidae (18%) and Pomacentridae (9%). This composition was corr...
Marine science and technology bulletin, 2021
Frigate tuna Auxis thazard (Lacepède, 1800) is the most dominant species caught by the multiple handline in the coastal and offshore fishing grounds of Tawi-Tawi, southern Philippines. In this study, we investigated the size distribution, length-weight relationship, and catch per unit effort of frigate tuna (A. thazard) in Tawi-Tawi waters, southern Philippines, caught using multiple handline. A total of 383 frigate tuna fish were sampled with a size distribution (total length) ranging from 16.5 to 34 cm. The length-weight relationship of frigate tuna was = 8 × 10 −3 × 3.139 , where the b value of 3.139 indicates a positive allometric growth pattern. The catch per unit effort of the used gear was 2.49±0.52 kg/hr.
Asian Journal of Fisheries and Aquatic Research
Zamboanga is one of the significant fishing grounds in the Mindanao Region, but little is known about the conservation status of reef fishes, particularly in Dumanquillas Bay, Zamboanga. Thus, this study assessed the abundance, species diversity, and conservation status of reef fishes in the bay. The assessment was conducted within eight sampling stations from May 6 to May 16, 2014. Reef fishes were censused using a line-intercept method. Fourteen thousand fifty individuals and 140 fish species belonging to 30 families were recorded―dominated by the family Pomacentridae. The number of fish individuals was significantly more abundant in Triton Island Station than in other sampling stations, while Muyong Island has the most diverse reef fishes. Almost all species are classified as the least concern category, except for Plectropomus areolatus of Cabog Island, which is under the vulnerable (VU) category. The number of less-valued species was higher than the commercially high-valued spec...
Length-weight relationships of marine fishes caught by Danish seine in Lingayen gulf
International Journal of Fisheries and Aquatic Studies, 2020
The length-weight relationship were analysed for each marine fishes caught by Danish Seine, using specimens collected from the Magsaysay Market, Dagupan City, Pangasinan. Two Sampling sites were selected, namely, Sector I (western Coast) and Sector III (eastern Coast). Two commercial fishing vessels were utilized in the study; one each in Sector I and Sector III. Sampling was done every 15 days for a period of two months. The length-weight relationship, determined by the regression analysis were evaluated for each major fishes. In Sector I, the length and weight relationship for Decapterus macrosoma, Sphyraena barracuda, Rastrelliger kanagurta, Decapterus kurroides and Nemipterus bathybius was growing in a negative allometric way except of the Rastrelliger kanagurta that grows in positive allometric way. In Sector III species of Saurida tumbil, Rastrelliger brachysoma, Trichiurus lepturus, Nemipterus bathybius and Sphyraena barracuda) Sector III grows in negative allometric way. In addition, most of the species shows a strong positive correlation this indicates that as the length increases, weight also increases. Introduction The size-weight relationship has been used in fishery analyses for several purposes: to convert one variable to another, to estimate the expected weight for a certain size of fishes [1]. Fish can attain either isometric growth, negative allometric growth or positive allometric growth. Isometric growth is associated with no change of body shape as an organism grows. Negative allometric growth implies the fish becomes more slender as it increase in weight while positive allometric growth implies relatively stouter or deeper-bodied as it increases in length [2]. The LWR of fishes is useful in assessing the relative well-being of the fish population. It is important in estimating the standing stock biomass, and comparing the ontogeny of fish population from different regions [3]. Length-weight relationship parameters are often used as an indicator of fatness and general well-being or of gonad development of fish and are useful for between region comparisons of life histories of a specific species [4, 5]. Lingayen Gulf is one of the major fishing grounds of the Philippines located in the northwestern part of Luzon. It lies within 16 o 00' N and 16 o 40' N latitudes and 119 o 55' E and 120 o 25' E longitudes. It is bounded on the west and south of Pangasinan province and northeast by La Union province. The gulf covers a total area of 2,085 km 2 with a 160 km coastline from Cape Bolinao to Poro Point and generally shallow with depths of less than 90 m. [6]. The gulf is one of the primary sources of livelihood of the people particularly those living in the coastal areas. Despite the usefulness of length-weight relationship in fisheries science and the importance of the Lingayen Gulf to the livelihood of the people, information about the length-weight relationships and condition factors of major fish species in Sector I and III are non-existent. The paucity of these information propelled this study, which to also provide useful information for better management of the gulf.
Croatian Journal of Fisheries, 2017
The objective of the present study was to examine the length-weight relationships and condition factors of snapper Lutjanus russellii, ponyfish Aurigequula fasciata and white-spotted spinefoot Siganus canaliculatus harvested from Ulelhee Bay, Banda Aceh City, Indonesia. These species are the predominant fishes caught by traditional beach trawl in Ulelhee Bay, Banda Aceh City, Indonesia. The sampling was conducted for three months from April to June 2015 at one-week interval. A total of 900 fish samples (300 individuals for each species) were measured for the total length and body weight. The length-weight relationships were calculated using Linear Allometric Model (LAM), while the relative weights (Wr) and Fulton's condition (K) factors were calculated to assess the condition of the fish samples. The results showed that the b value of 3.04 in snapper indicates isometric growth pattern, while ponyfish and white-spotted spinefoot fish had the b values of 1.41 and 1.75, respectively, and these species display an allometric growth pattern. The average Fulton's condition factor (K) of snapper was 3.01 for male and 2.49 for female; female ponyfish has the K value of 2.92 and 2.92 for male. In addition, the average K value of white-spotted spinefoot was 2.61 and 2.59 for female and male, respectively. The relative weight condition factor ranges from 58.73 to 166.09 for snapper, from 70.55 to 129.65 for ponyfish, and from 71.63 to 133.53 for white-spotted spinefoot. In general, the relative weight condition factors tendedto be 100. It is concluded that snapper has isometric growth pattern, while ponyfish and white-spotted spinefoot display the negative allometric growth pattern. The condition factors are in excellent condition and indicate a balance of prey and predator.
The objective of the present study was to examine the length-weight relationships and condition factors of snapper Lutjanus russellii, ponyfish Aurigequula fasciata and white-spotted spinefoot Siganus canaliculatus harvested from Ulelhee Bay, Banda Aceh City, Indonesia. These species are the predominant fishes caught by traditional beach trawl in Ulelhee Bay, Banda Aceh City, Indonesia. The sampling was conducted for three months from April to June 2015 at one-week interval. A total of 900 fish samples (300 individuals for each species) were measured for the total length and body weight. The length-weight relationships were calculated using Linear Allometric Model (LAM), while the relative weights (Wr) and Fulton's condition (K) factors were calculated to assess the condition of the fish samples. The results showed that the b value of 3.04 in snapper indicates isometric growth pattern, while ponyfish and white-spotted spinefoot fish had the b values of 1.41 and 1.75, respectively, and these species display an allometric growth pattern. The average Fulton's condition factor (K) of snapper was 3.01 for male and 2.49 for female; female ponyfish has the K value of 2.92 and 2.92 for male. In addition, the average K value of white-spotted spinefoot was 2.61 and 2.59 for female and male, respectively. The relative weight condition factor ranges from 58.73 to 166.09 for snapper, from 70.55 to 129.65 for ponyfish, and from 71.63 to 133.53 for white-spotted spinefoot. In general, the relative weight condition factors tendedto be 100. It is concluded that snapper has isometric growth pattern, while ponyfish and white-spotted spinefoot display the negative allometric growth pattern. The condition factors are in excellent condition and indicate a balance of prey and predator.