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Length‐weight relationship of fish species from Central Amazon floodplain
Author(s) -
Zuchi Nágila,
Röpke Cristhiana,
Shibuya Akemi,
Farago Thatyla,
Carmona Marina,
Zua Jansen,
Amadio Sidineia
Publication year - 2020
Publication title -
journal of applied ichthyology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.392
H-Index - 62
eISSN - 1439-0426
pISSN - 0175-8659
DOI - 10.1111/jai.14082
Subject(s) - amazon rainforest , amazonian , biology , floodplain , fish <actinopterygii> , range (aeronautics) , linear regression , freshwater fish , ecology , hydrology (agriculture) , fishery , statistics , mathematics , materials science , geotechnical engineering , composite material , engineering
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 × SL b . 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.