Length-weight relationship of fish species from Central Amazon floodplain |
| |
| Authors: | Nágila Zuchi Cristhiana Röpke Akemi Shibuya Thatyla Farago Marina Carmona Jansen Zuanon Sidineia Amadio |
| |
| Institution: | 1. Programa de Pós-graduação em Biologia de Água Doce e Pesca Interior, Instituto Nacional de Pesquisas da Amazônia – INPA, Manaus, Brazil;2. Coordenação em Biodiversidade, INPA, Manaus, Brazil |
| |
| Abstract: | Length-weight relationship (LWR) for 39 freshwater fish species captured in the Catalão Lake, a floodplain area at the confluence of the Amazonas and Negro rivers is presented. LWRs were calculated based on fish sampled over 18 years (1999–2017) using a set of ten gill nets with different mesh sizes, monthly immersed in water for 24-hr with 6-hr interval catches. Measurements were done for standard length (SL – 0.1 cm precision) and total weight (TW – 0.01 g precision). The LWRs were calculated by the linear regression of natural log-transformed SL and TW data: TW = a × SLb. All statistical analyses were performed with R software. From all species considered, 32 are new LWR records for the international literature as well as for the Amazonian ichythyofauna; additional records expand the known size range for seven species. |
| |
| Keywords: | Amazon floodplain LWR |
|
|
