Length-weight relationships for 19 fish species from the Jacuí Delta, RS, Brazil

Abstract

Summary This study presents length‐weight relationships (LWR) for 19 species captured in the Jacuí Delta in southern Brazil. Most of the species had no previous LWR estimates.

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

“…From the 15 species herein analyzed, 11 presented b values above those mentioned in FishBase database, but still following the tendencies determined by Froese (). Species such as Astyanax lacustris and Cyphocharax voga showed b values similar to those found in the delta of the Jacuí River (Antonetti, Leal, & Schulz, ) and the Chasqueiro Stream basin (Corrêa et al., ), two tributaries of the Patos Lagoon. When comparing the estimated LWRs, the values generated by our data are within or very close to the confidence intervals shown in FishBase for most of the analyzed species.…”

Length-weight relationship of trahira Hoplias aff. malabaricus (Bloch, 1794) in a regulated stream of southern Brazil

“…Novaes and Carvalho (2011) studied the population structure of trahira in the Jurumirim Reservoir, Brazil, and found negative allometric growth for b (n = 426, b = 2.75) that indicated the species grows more slowly in terms of weight than length, which differs from the type of growth of trahiras in the BHAC. Antonetti et al (2014) described a similar value (n = 57, b = 3.09) compared to BHAC individuals, indicating positive allometric growth. Barbieri et al (1982) and Barbieri (1989) studied Hoplias aff.…”

“…Corrêa et al Studies of ish populations related to trophic ecology, reproduction, and estimates of growth parameters are very important because they generate information needed to understand ecological relationships and this contributes to the management of ish stocks. Estimates of the length-weight relationship of a species provide relevant information for fishery management and conservation, as well as estimate the growth pattern of a species (LE CREN, 1951;FROESE, 2006;CHU et al, 2012;ANTONETTI et al, 2014). According to Froese (2006), there are few published studies about lengthweight relationships and these are only for a limited number of species, especially marine species, which makes modeling aquatic ecosystems more complicated.…”

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

“…(), Nuñer and Zaniboni‐Filho (), Antonetti et al. () and FishBase (Froese and Pauly, ). All LWRs were significant (P < 0.05) and presented a high coefficient of determination.…”

“…(), Antonetti et al. () and FishBase (Froese and Pauly, ). These differences could be attributed to a wide variety of factors as such gonadal maturity, sex, health, differences in the number of examined specimens, length range of captured individuals, type of habitat, seasonality and geographic region (Tesch, ; Weatherley and Gill, ; Moutopoulos and Stergiou, ; Oliva‐Paterna et al., ).…”