Length–weight relationships of fish species from Lower Paranapanema River Basin,Upper Paraná River Basin,Brazil

Length–weight relationships were estimated for six fish species occurring in direct tributaries of the Lower Paranapanema River Basin. Data is described for the first time for five species and new measurements are provided for one species in the FishBase database. Studies of fish diversity are critical for species management and conservation, especially in this basin, which has suffered from many anthropical impacts.     

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 and length–length relationships for 135 fish species from the Xingu River (Amazon Basin,Brazil)

Length–weight (LWR) and length–length relationships (LLR) are presented for 135 freshwater fish species sampled by several types of fishing gear between April 2012 and July 2014 in the middle and lower Xingu River Basin, northern Brazil. The report represents the first references on LWRs and LLRs for 114 and 119 species, respectively, and also provides a new maximum size for 96 species.     

Length–weight relationship of 10 freshwater fish species in Amazonian streams,Trombetas River basin (Brazil)

Length–weight relationships (LWR) were analyzed for 10 fish species from 26 Amazonian streams located in four micro‐basins in the Trombetas River basin, Pará State, Brazil. LWRs were calculated based on 1831 individuals sampled between 2010 and 2012 using a manual trawl. The coefficients of proportionality and allometry were within the ranges estimated for most fishes. No previous LWR information was available for these species in the literature.     

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 relationship of six freshwater fish species in upper‐middle Tocantins River basin (Brazil)

Length–weight relationships (LWRs) were analyzed for six abundant fish species in the upper‐middle Tocantins River, northeastern Brazil. Analyses included data from 486 specimens sampled in five expeditions between August 2013 and May 2015 by gillnets. New maximum values of total lengths for the literature and FishBase were presented for six species, as well as first time estimates of LWR for Galeocharax gulo, Curimata acutirostris and Aphanotorulus emarginatus.     

Length‐weight relationship (LWR) of fish species in the Morato River,Paraná, Brazil

The length‐weight relationship (LWR) was evaluated in six fish species occurring in the Rio Morato, which is located in the east state of Paraná, Brazil, in well‐preserved areas of Atlantic Forest. The fishes were collected every 2 months from November/2016 to October/2017 and the fishing equipment used was consisted of dragnets, mesh sieves and gillnets. The specimens were weighed and measured in the laboratory. The mean growth coefficients obtained ranged from 2.5 to 3.2, confirming the range describe in the literature.     

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 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 five fish species of headwater streams from upper Paraná River Basin,Southeastern Brazil

The length‐weight relationships (LWRs) of five fish species are reported. The fishes were sampled between September and December 2016 with seine net (4 mm mesh size) in 15 headwater streams from the upper Paraná River basin, Southeastern Brazil.     

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 relationship of 21 fish species from Rio Doce River basin,Minas Gerais,Brazil

The present study provides the length‐weight relationship (LWR) for 21 fish species from eight rivers from Rio Doce River basin, Minas Gerais States, Brazil. Fishes were collected between August 1991 and September 2017, with gillnets, hand nets, cast nets and trawl nets. Standard length and total weight were measured for the LWR, which allometric coefficients b varied from 2.621 to 3.146.     

Length–weight relationships of six fish species from Tapajós River,Eastern Amazon,Brazil

The present study reports the length–weight relationships of six fish species from the Tapajós River: Curimata inornata, Geophagus altifrons, G. neambi, Pachyurus junki, Pseudoloricaria laeviuscula and Pristobrycon striolatus. No previous LWR information was available for these species in the FishBase database. Coefficients for the parameter b varied from 2.83 to 3.56.     

Length–weight relationships of four fish species from the upper Paraná River basin,Southeastern Brazil

Here the length–weight relationships (LWR, hereafter) of Pareiorhina pelicicei, Trichomycterus candidus, T. pirabitira, and T. piratymbara are provided. Samples of each species were collected between April and July 2017 with a hand net (1.5 mm mesh) in three sites from the upper Paraná River basin, Southeastern Brazil. These results increase knowledge about the LWR of Neotropical freshwater fish.     

Length–weight relationship for freshwater fish species from Brazilian Cerrado

Presented are length–weight relationship (LWR) estimates for 15 native fish species captured between 2010 and 2011, in the Munim River, Brazilian Cerrado basin. Samples were collected using gillnets of four different mesh sizes (3.0, 4.0, 5.0 and 6.0 cm), hand nets and a covo‐fish trap. Additionally provided are the first LWRs for eight species, specially the recently described species Charax awa Guimarães, Brito, Ferreira & Ottoni, 2018.     

Length–weight relationships of three fish species from Wujiang River,China

Length–weight relationships were determined for three fish species (Pseudogyrinocheilus prochilus Sauvage & Dabry de Thiersant, 1874; Folifer brevifilis Peters, 1881; and Garra imberba Garman, 1912). Samples were collected from the Wujiang River in China, from May to July in 2009–2011 using gillnets (25 × 12 m, mesh size 0.5 cm) and fish cages (0.5 × 0.5 × 10 m, mesh size 0.5 cm mesh). Length–weight relationships for these three fish species were determined for the first time.     

Length–weight relationships of three fish species from Moyangjiang River,China

Length‐weight relationships were determined for three fish species [Tachysurus argentivittatus (Regan, 1905); Rhodeus spinalis Oshima, 1926; Liniparhomaloptera disparis (Lin, 1934)]. All fish sample were collected using gillnets (15 × 5 m, mesh‐size 5 mm) from Moyangjiang River, China. Samples were collected quarterly from July 2006 to August 2007. The parameter b of length‐weight relationship varied from 2.52 for Rhodeus spinalis to 3.27 forLiniparhomaloptera disparis.     

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.