Length–weight relationships for 15 fish species from the Three Gorges Reservoir

The length–weight relationships (LWRs) for 15 fish species from the Three Gorges Reservoir (TGR) were described in this paper. Specimens were collected using gill nets (mesh size: 6, 8, 10, 12 cm), cage net (mesh size: 1 cm), benthic fyke net (mesh size: 1 cm), hook longlines (80 m long, 3 barbless hooks per meter line) and electrofishing (power: 1,500 w; distance of electrodes: 1–2 m; water depth: 0.2–1.0 m; water area: 1–2 m²; catch by dip net [mesh size: 0.4 cm]) at four sections of the TGR, monthly in June–August and October–November in 2017 and 2018. The first LWR reference for Zacco acutipinnis (Bleeker, 1871), Discogobio brachyphysallidos Huang, 1989, Squalidus nitens (Günther, 1873), Leptobotia pellegrini Fang, 1936, Sinibotia reevesae (Chang, 1944), Pseudobagrus tenuifurcatus (Nichols, 1931), Pseudobagrus medianalis (Regan, 1904), Liobagrus marginatoides (Wu, 1930), Glyptothorax fokiensis (Rendahl, 1925), and Ctenogobius szechuanensis (Liu, 1940) and new maximum total length for 12 species are provided.     

Length–weight relationships of 55 fish species from the Three Gorges Reservoir in the Yangtze River,China

The paper reports the length–weight relationships of 55 species from the Three Gorges Reservoir (TGR) of the Yangtze River, China, and the largest reservoir in the world. A total of 24,176 specimens were collected from July 2012 to January 2015. Length–weight relationships for 33 fish species not recorded previously in FishBase, and the maximum total lengths computed for eight species are presented. The a values varied between 0.00054 and 0.01923, and the b values ranged from 2.729 to 3.583. The results will be useful for the application of sustainable management and conservation of these fishes in the TGR of the Yangtze River.     

Length‐weight relationships of nine fish species from the Tetulia River,southern Bangladesh

The present study describes the length‐weight relationships (LWRs) for nine fish species from the Tetulia River, southern Bangladesh, namely Anabas testudineus, Coilia dussumieri, Otolithoides biauritus, Otolithoides pama, Pethia conchonius, Polynemus paradiseus, Puntius lateristriga, Setipinna taty and Sillaginopsis panijus. A total of 1380 specimens were caught using traditional fishing gear from March 2012 to February 2013. Individual total length (TL) and body weight (BW) were measured by digital slide calipers and digital balance, respectively. The LWR was calculated as W= a L^b, where the W is the BW in g and L the TL in cm, a and b are regression parameters. This study presents the very first references on LWRs for seven of the species. The results are valuable for the application of sustainable management and conservation of these fishes in the Tetulia River and surrounding ecosystems.     

Length–weight relationships for nine fish species in Lake Dianshan,China

Presented are the relationships between fork length (FL) and weight (W) for nine fish species sampled from 2010 to 2012 in Lake Dianshan, Shanghai, China. Values of the parameters a ranged from 0.005 to 0.017 and b values ranged from 2.590 to 3.511; all r² for the relationships were higher than 0.950. A new maximum length for Plagiognathops microlepis is also reported.     

Length‐weight relationships for nine fish species from shallow lakes of the Pampa plain,Argentina

This study presents length‐weight relationships for nine neotropical fish species collected from four shallow lakes from the southeastern Pampean region, representing the first record for these species. Also, new sizes for six species are also provided.     

Length‐weight relationships of 19 fish species from the Saemangeum Reservoir in South Korea

The length‐weight relationships were analysed for 19 species classified into nine families from the Saemangeum reservoir, South Korea. The sample size ranged from 12 individuals for Silurus asotus and Micropterus salmoides to 548 for Liza haematocheila. Six species have no length‐weight information in FishBase.     

Length‐weight and length‐length relationships of five fish species from the Zigui section of the lower Three Gorges Reservoir,Hubei Province,China

This paper provides the length‐weight and length–length relationships for five fish species in the Zigui section of the lower Three Gorges Reservoir of the Yangtze River. Specimens were collected from December 2014 to January 2017, using various types of fishing gear and electroshock fishing techniques. Length‐weight relationships (LWRs) for one fish species and Length–length relationships (LLRs) for five fish species are unknown to FishBase. New maximum total lengths for four species were also recorded for FishBase. Moreover, standard‐length to total‐length equations for converting size measurements for these five species are presented.     

Length‐weight relationships of three estuarine fish species from Bangladesh

The length‐weight relationships (LWRs) of three fish species; Toxotes chatareus (Hamilton, 1822), Datnioides polota (Hamilton, 1822), and Chela cachius (Hamilton, 1822) collected between September 2016 and August 2017 from Tentulia estuary of Bangladesh were analyzed. Fish were caught seasonally using set bag net and cast net with mesh size of 0.5 cm and < 0.5 cm, respectively. LWRs of Toxotes chatareus, Datnioides polota and Chela cachius were calculated as W = 0.0154L^2.926 (r² = .962), W = 0.0149L^3.106 (r² = .992) and W = 0.0109L^2.968 (r² = .981), respectively. The study provides a new maximum total length for Chela cachius.     

Length‐weight relationships of nine fish species from the Qingjiang River,Yangtze River basin,China

This study presents the first report of length‐weight relationships (LWRs) for five fish species (Parabotia fasciata, Megalobrama mantschuricus, Plagiognathops microlepis, Rhodeus sinensis, Rhodeus fangi) and maximum total lengths for four species from the Qingjiang River, Yangtze River basin, China. Specimens were sampled in six sections along the Qingjiang River over a period of 1 year between April 2016 and March 2017 with gill nets (150 × 10 m; mesh size: 1–14 cm), benthic fyke nets (mouth opening: 12 × 12 cm; 10 m; mesh size: 1 cm) and stationary lift nets (10 × 10 m; mesh size: 0.8 cm).     

Length‐weight relationships of 58 fish species in French Guiana streams

Length‐weight relationship parameters of the form W = aL^b are presented for 58 fish species representing 36 genus and 19 families captured in streams of French Guiana. LWRs for 53 of the species are estimated for the first time.     

Length–weight relationships for 85 fish species from Guam

Length–weight relationships (LWRs) were developed for 85 reef and bottom‐fish species from Guam. These are the first published LWRs for Guam, and include new LWRs for nine species lacking these relationships in FishBase.     

Length‐weight relationships of three cyprinid fish species from southwestern China

Length–weight relationships (LWRs) were determined for three cyprinid fish species [Acrossocheilus yunnanensis (Regan, 1904), Onychostoma simum (Sauvage & Dabry de Thiersant, 1874) and Spinibarbus sinensis (Bleeker, 1871)] from southwestern China. Samples were obtained with various fishing gear (set nets, drift gill nets, fish cages, hook and electrofishing). Prior to this study, the LWRs for these three species (A. yunnanensis, O. simum and S. sinensis) were unknown.     

Length‐weight relationships for six freshwater fish species from the Seyhan Reservoir (south‐eastern Anatolia,Turkey)

Length–weight relationships (LWRs) were evaluated for six freshwater species from the Seyhan Reservoir (south‐eastern Anatolia, Turkey): Alburnus orontis, Capoeta angorae, Capoeta erhani, Garra rufa, Luciobarbus pectoralis and Salaria fluviatilis. A total of 525 specimens were captured from five locations using gill nets, scoop nets, and trammel nets of various mesh sizes in November 2012, March 2013 and September 2013. Regressions of all species were found to be significant. These are the first LWR reports for these species from the Seyhan River basin, and the first LWR reports for three of these species (Alburnus orontis, Garra rufa, Luciobarbus pectoralis) from inland waters of Turkey.     

Length‐weight relationships of three fish species from Beibu Gulf in China

The length–weight relationships (LWRs) were analyzed for three fish species collected from Beibu Gulf between October 2012 and March 2013. The study used bottom trawl with 40 mm mesh size. The values of parameter b varied from 2.8495 to 3.0277.     

Length‐weight relationships of five fish species in Tibet,southwest China

Length‐weight relationships (LWR) were evaluated for five species: Schizothorax integrilabiatus (Wu et al., 1992); Shizopygopsis stoliczkai Steindachner, 1866; Gymnocypris chui Tchang, Yueh & Hwang, 1964; Gymnocypris scleracanthus Tsao, Wu, Chen & Zhu, 1992; and Triplophysa tibetana (Regan, 1905). A total of 567 specimens were collected whereby S. integrilabiatus was caught with 12‐volt electric fishing gear (water depth, 1 m) in Buqun Lake in May 2015. Both G. chui and G. scleracantus were caught with 12‐volt electric fishing gear (water depth,1 m) and set gillnets (mesh size 3 cm) in Lange Lake in July 2015, S. stoliczkhai was caught with 3 cm mesh size set gillnets in Shiquan River in August 2015, T. tibetana was caught with 12 V electric fishing gear in the Zhongba reach of the Yarlung Zangbo River in August 2015. This study provides the first published length–weight references on LWR for the five species. New maximum total lengths were recorded for three species, including Shizopygopsis stoliczkai, Gymnocypris chui, and Gymnocypris scleracanthus.     

Length‐weight relationships for nine fish species of Laohegou River,a tributary of upper Yangtze River,China

This paper provides length‐weight relationships for nine fish species from the Laohegou River, a tributary of the upper Yangtze River. Length‐weight relationships for six of these species are recorded for the first time. New maximum lengths for two species are also reported.     

Length–weight relationships for ten endemic fish species of Anatolia

This study presents the first references available for length–weight relationships (LWRs) of ten endemic fish species: Oxynoemacheilus eregliensis (Banarescu & Nalbant, 1978), Seminemacheilus lendlii (Hankó, 1925), Cobitis turcica Hankó, 1925, Capoeta antalyensis (Battalgil, 1943), Capoeta caelestis Schöter, Özulug & Freyhof, 2009, Capoeta pestai (Pietschmann, 1933), Gobio gymnostethus Ladiges 1960, Gobio hettitorum Ladiges, 1960, Pseudophoxinus antalyae Bogutskaya, 1992 and Scardinius elmaliensis Bogutskaya, 1997 from the inland water systems of Turkey.     

Length‐weight relationships for five fishes in the Pengxi River,a main tributary of the Three Gorges Reservoir,China

The length‐weight relationships and new total length are described for five fish species in the Pengxi River basin of the Three Gorges Reservoir. Fish were occasionally sampled from five sites between 2009 and 2014, using various gill nets (mesh size range 2–12 cm) and electrofishing. For four of the five species studied a new maximum total length not yet recorded in previous length‐weight estimates have been found. These data will help to convert length data from field studies in the Three Gorges Reservoir into weight and biomass.     

Length–weight relationships for 37 freshwater fish species of Iran

Length–weight parameters were estimated for 37 freshwater fish species of Iran belonging to seven families. Significant length–weight relationships with high correlation coefficients were found for all species.     

Length–weight relationships of nine freshwater fish species from the Liujiang River,Guangxi, China

Studied were the length–weight relationships (LWRs) of 599 fish specimens covering four families, nine genera and nine species (Sinibrama macrops, Acrossocheilus parallens, Microphysogobio fukiensis, Squalidus wolterstorffi, Pseudohemiculter dispar, Tachysurus fulvidraco, Hemibagrus macropterus, Pseudobagrus crassilabris and Siniperca kneri) collected in the Liujiang River, a tributary of the Pearl River, in March 2014, September 2014 and March 2015. The b value varied between 2.385 (P. crassilabris) and 3.178 (P. dispar), with the mean b = 2.85 at P < 0.001 for all nine species.