Length-weight relationships of dominant fish species from Caxiuanã National Forest, Eastern Amazon, Brazil

Abstract

Summary The present work presents parameters of the length–weight relationships (LWR) for 12 species of freshwater fish from rivers within the Caxiuanã National Forest, Eastern Amazon. Data coverage include the main taxonomic groups in the sampling area: Characiformes: Acestrorhynchidae, Anostomidae, Curimaridae, Erythrinidae, Hemiodontidae; Siluriformes: Auchenipteridae; Perciformes: Sciaenidae. LWR parameters are estimated for the first time for five species: Leporinus affinis, Bryconops melanurus, Pygopristis denticulata, Serrasalmus gouldingi and Triportheus albus. Relative growth patterns were evenly distributed among species, one‐third showing negative allometry (b < 3; n = 4), isometry (b = 3; n = 4) or positive allometry (b > 3; n = 4).

Length-weight relationship in ten fish species from the Nhamundá River, the Amazon Basin, Brazil

“…The alometric growth factor (b) obtained for A. microlepis, B. maculata, A. halecinus, T. albus, A. longimanus, A. nuchalis and I. amazonica ranged the same value range that already described by literature (Giarrizzo et al 2011, Freitas et al 2014. For H. immaculatus we recorded an isometric growth, while Giarrizzo et al (2011) verified a positive alometry for the specie.…”

“…Additionally, the knowledge from LWR is essential to assess fish stocks, fisheries, and environmental monitoring programs (Froese et al 2011;Giarrizzo et al 2015). According to Freitas et al (2014), the LWR studies become relevant due the need to comprehend the fish lifecycle, principally regions where fisheries represent one of the most important economic activities and fish stocks are the main food source for many traditional communities.…”

“…The Amazon Basin has the largest fish diversity on Earth (Albert and Reis 2011), but there are few studies concerning the fish LWR in this region (Freitas et al 2014;Schmid et al 2015). Due the high environmental heterogeneity of the Amazon Basin (Junk and Furch 1993), the wide-ranged species have to improve different life strategies, which may reflect variances in the biological parameters, such as those obtained from LWR studies.…”

Length–weight relationships of eight fish species from Guyana coastal drainages, Amapá, Brazil

“…These data can be useful for fisheries research and stock management, and also fill in gaps about the understanding of the local ichthyofauna. However, despite the recent increase of published LWR studied for Amazonian fishes (e.g., Freitas et al, ; Cella‐Ribeiro, Hauser, Nogueira, Doria, & Torrente‐Vilara, ; Giarrizzo et al, ), including studies in the same aquatic biogeographic region (Nobile et al, ; Sá‐Oliveira, Angelini, & Isaac‐Nahum, ), there is still much work to be done considering that the Amazon basin comprises the most diverse freshwater fish fauna in the world (Reis et al, ). It is especially true for low commercial interest species (Freire, Rocha, & Souza, ), such as those reported herein.…”

“…The length–weight relationships (LWR) provides information about the life cycle of fishes, including aspects like growth patterns, condition factor and biomass (Freitas, Prudente, Fontoura, & Montag, ; Froese, Tsikliras, & Stergiou, ; Giarrizzo et al, ). Moreover, LWR allows us to estimate the weight of individuals from species length measurements (or vice versa), when there are difficulties in field sampling (Carlander, ; Froese, ).…”