Length–weight relationship for seven freshwater fish species from Brazil

The present study reports length‐weight relationships for seven native freshwater fish species (Triportheus angulatus, Psectrogaster rhomboides, Prochilodus brevis, Leporinus piau, Cichlasoma orientale, Crenicichla menezesi, and Pimelodella gracilis) captured in a semiarid Brazilian reservoir located in the state of Rio Grande do Norte.     

Length–weight relationship of seven freshwater fish species from Turkish Thrace

The length‐weight relationships (LWRs) of Alburnus istanbulensis Battalgil, 1941, Barbus tauricus Kessler, 1877, Cobitis pontica Vasil'eva & Vasil'ev, 2006, Cobitis strumicae Karaman, 1955, Gobio bulgaricus Drensky, 1926, Phoxinus strandjae Drensky, 1926 and Squalius orpheus Kottelat & Economidis, 2006 were analysed. Fish samples were collected by electroshocker (SAMUS 725 G and SAMUS 725 M portable electroshockers; frequency 50–55 Hz; 30–70 cm fishing depth) in some water bodies in Turkish Thrace from March 2012 to August 2017. The values of parameter b in the LWR equations varied from 2.916 (B. tauricus) to 3.336 (P. strandjae). This study also provides a new maximum length data for A. istanbulensis, G. bulgaricus, P. strandjae and S. orpheus.     

Length–weight relationship for nine freshwater fish species from Wujiang River in China

Length–weight (LWR) relationships were estimated for nine fish species collected in the Wujiang River located near the city of Chongqing, China. The value of the exponent ‘b’ in the LWR was between 2.594 and 3.528, which shows that the species exhibit an allometric growth pattern. All relationships between total length (TL) and body weight (BW) were linear (in all cases: r² > 0.913).     

Length–weight relationships of four freshwater ornamental fish species from the Brazilian Negro River basin

The present work reports the length–weight relationships (LWR) for four ornamental fish species from the middle Negro River basin, Amazonas, Brazil. The r² value ranged from 0.810 to 0.941 and values of b varied from 2.346 to 3.442. These results represent the first reference on LWR for all four species, based on FishBase.     

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 for freshwater fish species from humid forest enclaves at the Brazilian semiarid

We report the length‐weight relationships (LWR) for 11 fish species inhabiting headwater streams in the Araripe and Ibiapaba plateaus, Brazilian semiarid. Values of r², a and b ranged respectively from .953 to .998, 0.010 to 0.043 and 2.81 to 3.69. Our reports on LWR are pioneer in humid forest enclaves at the Caatinga biome. Such enclaves of forest can be a checkpoint to climate change, but are under strong human pressure and remain under low investigation.     

Length–weight relationships of eight freshwater (Cypriniformes) fish species from Turkey

The length–weight relationships for eight freshwater fish species collected from Bey?ehir Lake, E?irdir Lake, Aksu River, Alara River, Göksu River and Menzelet Reservoir, were analysed. This paper represents the first LWR references for four of these species and also four of these species are endemic to Turkey.     

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 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 six freshwater fish species from the semiarid region of Brazil

Evaluated were the length–weight relationships of six freshwater fish species caught in the Santa Cruz Reservoir in the semiarid region of Brazil: one Characidae, one Prochilodontidae, one Anostomidae, two Loricariidae and one Cichlidae, providing the first references of length–weight relationships and new maximum lengths for these species.     

Length–weight relationship of five commercially important freshwater fish species in the Kashmir Valley,India

Length–weight relationships were analysed for five commercially important freshwater fishes, namely, Bangana diplostoma (Heckel, 1838), Schizopyge niger (Heckel, 1838), Schizothorax curvifrons (Heckel, 1838), Schizothorax plagiostomus (Heckel, 1838) and Glyptosternon reticulatum (McClelland, 1842) from different water bodies in the Kashmir Valley, India. A total of 610 samples were collected between October 2013 and May 2015 using various indigenous cast nets. Of these five species, Schizopyge niger has a new maximum length record for the FishBase LWR database.     

Length–weight relationships for freshwater fish species from the Pantanal of the Negro River,Brazil

The present study describes the length‐weight relationships (LWRs) of 28 species captured in Santa Virgínia Bay, in the Pantanal of the Negro River, Mato Grosso do Sul State, Brazil, over 3 years (1999 to 2001). The study provides the first references on LWRs for thirteen of these species.     

Length–weight relationship of three fish species from the Qiantang River,China

Length–weight relationships (LWRs) of the three fish species, Pseudobagrus albomarginatus(Rendahl, 1928), Pseudobagrus crassilabris (Günther, 1864), and Rhinogobius davidi(Sauvage & Dabry de Thiersant, 1874), were determined respectively. Samples were collected from Qiantang River, China during March 2016–December 2017. The bvalues ranged from 2.525 to 2.917, the coefficient of determination (r²) ranged from 0.96 to 0.97. Prior to this study, the length–weight relationship for P. albomarginatus and R. davidi were unknown to FishBase and the new maximum total lengths for three species were not recorded in FishBase. These results are useful for the fishery research and management in Qiantang River.     

Length–weight and length–length relationships of 16 fish species from Amapá, Brazilian Amazon

The present study provides length‐weight (LWR) and total length‐standard length (LLR) relationships for 16 freshwater fish species collected in coastal rivers of the northern Brazilian, state of Amapá in 2015. Fishes were caught in heterogenic environments like ponds, stream and river channel with sieve and trawl. As result, we present novel information of LWR and LLR for 11 and 15 species, respectively. Maximum values (first values or new maximum values) of TL, SL and WT are presented for 14, 12 and 15 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 relationship of 62 fish species from the Central Aegean Sea,Turkey

Length–weight relationships were estimated for 11 elasmobranch and 51 teleost fish species caught in Izmir Bay, Turkey. Sampling was carried out from June 2005 to May 2006 at monthly intervals using a bottom trawl net. The mean b‐value was calculated as 3.10 (SE = ±0.03) and only three species were out of range between 2.5 and 3.5.     

Length‐weight relationship of ten indigenous freshwater fish species from Gandak River,Bihar, India

Ten indigenous freshwater fish species belonging to nine genera and seven families were collected from Gandak River, Bihar, India during December, 2014 to September, 2016. Fishes were caught using Cast nets, Gill nets, Drag nets with mesh size of 15–20 mm, 25–30 mm and 5–10 mm respectively along with Traps. Sampling was done during dry and wet seasons and a total of 682 fish were collected for analysis of their Length–Weight Relationships (LWRs). Analyses included seven species for which no previous LWRs information were available in FishBase, and new maximum lengths were recorded for three 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.