AVALIAÇÃO DO ESTOQUE PESQUEIRO DA CURIMATÃ Prochilodus nigricans (Prochilodontidae) NA REGIÃO DO BAIXO SOLIMÕES POR MEIO DE DOIS MÉTODOS QUE UTILIZAM BASES DISTINTAS DE INFORMAÇÃO

Abstract

This study aimed to evaluate the conservation status of the fishing stock of Prochilodus nigricans in the Solimões region through two models that use different databases. To apply the Beverton & Holt analytical model, 12,246 length measurements were recorded between January 2012 and December 2013 in the municipalities of Iranduba and Manacapuru. To apply the PARFISH model, based on the empirical knowledge of fishermen, 48 interviews were carried out. The average length of the fish was 23.5 ±2.3 cm. The estimated parameters were: asymptotic length (L∞ = 35.7 2012 and 35.6 2013 cm), growth coefficient (k = 0.62 year-1 2012, 0.57 year-12013), average longevity (A0.95 = 4.89 years), natural mortality (M = 0.65-1 2012 and 0.56-1 2013), fishing mortality (F = 1.79-1 2012 and 1.94-1 2013), total mortality (Z = 2 .45-1 2012 and 2.51-1 2013) and exploitation rate (0.73-1 2012 and 0.77-1 2013). The Beverton & Holt model showed that current fishing effort (F) has already exceeded the Maximum Sustainable Yield (RMS), suggesting that the stock is overfished. The PARFISH model also indicated a state of overfishing, but the RMS result was associated with great uncertainty. We conclude that there is a need to implement management strategies aimed at recovering the stock in this region and that PARFISH can be an alternative tool in the management of fishing resources in the Amazon basin.