Dinâmica populacional de Prochilodus nigricans capturada no Lago Manacapuru (Bacia Amazônica- Brasil)

Prochilodus nigricans , called curimata in the Amazon Basin, is the most exploited fish species by commercial fishing fleets of Amazonas state. Were studied its population dynamics using length and weight data from fish caught at Manacapuru Lake, a large ria lake located along the lower reach of the Solimoes River. Were sampled 1,178 P. nigricans individuals with lengths between 20 and 33 cm and weights between 195 and 875 g. The estimated length-weight relationship was W = 0.0636 L2.72, and the parameters of the von Bertalanffy growth curve were k = 0.44.year-1 and L∞ = 34.6 cm. The rate of fishing exploitation varied between 27.97% and 69.23% depending on the method employed to estimate the natural mortality.