Population and biological parameters of selected fish species from the middle Xingu River, Amazon Basin

Brazilian Journal of Biology

M. Camargo¹  T. Giarrizzo¹  Vj. Isaac¹ 

关键词: amazon fishes;    population dynamics;    life history strategies;    Belo Monte dam;    peixes amazônicos;    dinâmica populacional;    estratégias de vida;    hidrelétrica de Belo Monte;   

DOI  :  10.1590/1519-6984.01914BM

来源: SciELO

【 摘 要 】

Abstract This study estimates the main biological parameters, including growth rates, asymptotic length, mortality, consumption by biomass, biological yield, and biomass, for the most abundant fish species found on the middle Xingu River, prior to the construction of the Belo Monte Dam. The specimens collected in experimental catches were analysed with empirical equations and length-based FISAT methods. For the 63 fish species studied, high growth rates (K) and high natural mortality (M) were related to early sexual maturation and low longevity. The predominance of species with short life cycles and a reduced number of age classes, determines high rates of stock turnover, which indicates high productivity for fisheries, and a low risk of overfishing.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License