Length‐weight relationships for nine fish species in the Three Gorges Reservoir

Length‐weight relationships (LWRs) were determined for nine fish species occurring in the Three Gorges Reservoir(28°56′–31°44′N, 106°14′–111°28′E). Fish were collected using gill nets, including two of 1.0 m depth, 100 m long, and mesh size of 0.5 cm; two of 1.0 m deepth, 150 m long, and mesh size of 2.0 cm; and one of 1.5 m deepth, 100 m long, and mesh size of 6.0 cm. Gill nets were set over night including different habitats (riffles and pools, vegetated and non vegetated zones) from seven sites seasonally from January 2014 to January 2018. The first LWR reference for Jinshaia abbreviata (Günther, 1892), and Triplophysa tanggulaensis (Zhu, 1982) and new maximum lengths for other seven species are provided when comparing with records given in the international electronic databank FishBase (Froese & Pauly, FishBase. World Wide Web electronic publication, 2018).     

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 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 15 fish species from the Lower Uruguay freshwater ecoregion

This work is the first report on length–weight relationships for 15 fish species from the Lower Uruguay freshwater ecoregion. Fishes were collected between 2008 and 2010 in eight streams (Cañada del Sauce, San Luis, Don Esteban Chico and Grande, de la Palmita, Lencina, del Sauce and del Totoral), all tributaries to the Negro River (Uruguay). A standardized fishing effort (50 electric pulses along 100 m) with an electrofishing device (Type IG600T, Hans Grassl GmbH, Schönau am Königssee, Germany) was conducted in each wadeable stream reach. New maximal standard lengths and total weight are given for five and 13 fish species, respectively.     

Length–weight relationships of 23 fish species from Southeastern Brazil

Length–weight relationships of 23 fish species from the Guaratiba mangrove area in southeastern Brazil were estimated. The value of the parameter b ranged from 2.63 to 3.39 (median = 2.97). This study presents the first estimation of LWR for two species (Ctenogobius stomatus and Ctenogobius boleosoma). New maximum length records were obtained for two species (Poecilla vivipara and Ctenogobius stomatus).     

Length–weight relationships of 33 fish species from New Zealand

Length–weight relationships are presented for 33 fish species from New Zealand. The parameters a and b of the equation W = aL^b were estimated. Parameter b ranged from 2.51 (Pseudocaranx dentex) to 3.51 (Alepocephalus antipodianus) with a mean of 3.12 ± 0.24. Most of these estimates (90.9%) were between 2.8 and 3.4. Maximum lengths and depths of catch are updated for nine species.     

Length–weight relationships of 15 fish species from Tembeling River,Pahang, Malaysia

This study reports the length–weight relationships (LWR) of 15 fish species from Tembeling River, Pahang, Malaysia. The river flows adjacent to the National Park, Pahang, and supplies fishes for local consumption. In addition, this river also functions as a main water body for protection and breeding of commercial fish species. A total of eight LWRs were unknown to FishBase, and five new maximum lengths were identified from the study.     

Length–weight relationships for three fish species from Yalong River in China

This study provides the first report of length–weight relationships (LWRs) for three fish species collected from the Yalong River, one of the tributaries to the upper reaches of the Yangtze River, China. The LWRs of these fish species were BW = 0.0070TL^3.0539 (r² = 0.9662) for Schizothorax wangchiachii, BW=0.0134TL^2.8523 (r² = 0.9676) for Schizopygopsis malacanthus, and BW=0.0143TL^2.9253 (r² = 0.8538) for Euchiloglanis kishinouyei, respectively. Also investigated were the spawning season, absolute fecundity and main food items of the three fish species in the natural environment. In addition, new maximum sizes for the three species are provided.     

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 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 22 fish species from the East China Sea

Estimated length–weight relationships are presented for 22 commercially important marine fish species representing nine families, found in the East China Sea. A total of 2776 specimens were caught by otter trawl on the continental shelf in the East China Sea between 2009 and 2013. Information pertaining to length–weight relationships should lead to a better understanding of fish communities in the East China Sea.     

Length–weight relationships of three fish species from the South China Sea

The length–weight relationships were determined for three fish species: Histiopterus typus (Temminck & Schlegel, 1844), Branchiostegus argentatus (Cuvier, 1830), and Ilisha elongata (Anonymous [Bennett], 1830). Samples were collected from the South China Sea with commercial trawls in June 2016 using trawl nets. Prior to this study the length–weight relationships for these three species were unknown.     

Length–weight relationships for 15 fish species of the Xun Jiang River in Guangxi,China

Length–weight relationships (LWRs) were estimated for 15 species belonging to four orders and five families from the Xunjiang River, China. Exponent b varied from 2.364 to 3.634, and r² values varied from .914 to .991. This is the first LWR report in the area for these species, seven species of which are published for the first time.     

Length–weight relationships for eight fish species from the Pearl River Delta,China

Length–weight relationships (LWRs) were estimated for eight native fish species collected in the lower reaches of the Pearl River, Guangdong Province, South China. Fish were sampled in March and September 2014 and January 2015, using gillnets with various mesh sizes (5–8 cm) and trawl nets with a 3 cm mesh size. A total of 568 specimens of the eight species were analyzed. The r² values for these species ranged from 0.951 to 0.991. The b values ranged from 3.00 for Takifugu ocellatus and Moolgarda cunnesius, to 3.57 for Clupanodon thrissa. New maximum total lengths are recorded for Takifugu ocellatus (17.6 cm) and Liza carinata (24.4 cm). For five species (Clupanodon thrissa, Megalobrama terminalis, Collichthys lucidus, Coilia grayii, Takifugu ocellatus), the LWRs are presented to fishbase for the first time.     

Length–weight relationships of 15 fish species in wetland areas of coastal southern Brazil

Herein are the length–weight relationships of 15 fish species from wetland areas of the coastal region in southern Brazil. In 2010, fishes were sampled seasonally in four wetlands utilizing beach seine nets.     

Length–weight relationships for four endemic fish species from the Yalu River,China

Length–weight relationships (LWRs) are presented for four endemic fish species caught in the upper Yalu River during the yearly surveys (2017) by either electrofishing or fish cage net (5 mm mesh size) as soon as the ice melted. The parameter b ranged between 2.244 in Gobio macrocephalus and 3.428 in Ladislavia taczanowskii. Additionally, the parameter a ranged between 0.004 in Misgurnus bipartitus and 0.059 in Gobio macrocephalus. All length‐weight relationships were highly significant (r² ≥ 0.8754) on a log scale.     

Length–weight relationships for three fish species from the Yalong River,southwestern China

Length–weight relationships were determined for three fish species: Gymnodiptychus pachycheilus (Herzenstein, 1892), Discogobio yunnanensis (Regan, 1907), and Triplophysa pseudostenura (He, Zhang & Song, 2012). Samples were collected from the Yalong River, southwestern China using fishing gear (gillnets, 30 × 15 m, mesh‐size 5 mm) and electroshock fishing (CWB‐2000 P, 12 V, 250 HZ) in June 2007. Prior to this study, length–weight relationships for these three species were unknown. For two of the species [Discogobio yunnanensis (Regan, 1907) and Triplophysa pseudostenura (He, Zhang & Song, 2012)], new maximum standard lengths not yet reported in the scientific literature were noted.     

Length–weight relationships of three fish species from Trasimeno Lake,Italy

Length–weight relationships for Alburnus arborella, Esox cisalpinus and Scardinius hesperidicus from Trasimeno Lake are provided. A total of 4,205 specimens were collected for examination from 2008 to 2014 throughout the lake by means of electrofishing and nets. For all species the value of b ranged from 2.887 for Esox cisalpinus males to 3.115 for Scardinius hesperidicus. The study provides the first reference of length–weight relationships for the three species. A new maximum total length is also reported for E. cisalpinus.