Abstract
Este estudo objetiva estabelecer chaves para conversão das categorias comerciais de peso do camarão-rosa, Farfantepenaeus subtilis , para classes de frequência em comprimento e peso na costa amazônica do Brasil. Os dados de comprimento do camarão foram obtidos por amostragem nas indústrias de pesca de Belém, norte do Brasil, de maio a agosto de 2008, e de novembro de 2011 a junho de 2012. Os dados de peso se referem a um período de 20 meses entre 2010 e 2012. Com o uso das chaves de conversão pode-se obter a distribuição da frequência total do comprimento e do peso das capturas para o período considerado e, através de uma simples extrapolação, a distribuição para o total das capturas. A distribuição de frequências de comprimento é a base para a Análise de População Virtual e avaliações do estoque pesqueiro.
Highlights
The southern brown shrimp, Farfantepenaeus subtilis is the main species of the Penaeidae family found off the Brazilian Amazon Coast
In northern Brazil, shrimp fishing at an industrial scale began in 1969 when fishing companies based at Belém, State of Pará, started operating a small national fleet of 6 vessels which had reached 50 units by 1978 (IBAMA, 1997)
The amount of data on the southern brown shrimp caught off northern Brazil has increased significantly in recent years
Summary
The southern brown shrimp, Farfantepenaeus subtilis is the main species of the Penaeidae family found off the Brazilian Amazon Coast. The commercial fishing for shrimp species belonging to this family is a common activity in the tropical and subtropical regions of the world, and it is highly profitable in countries where industrial fishing has expanded since the 1950s (Isaac et al, 1992). Fish sampling during unloading is a classic problem for fishery statistics, since the main goal of sampling a landing is to estimate shrimp composition by size which is amenable to be converted into an age structure. In addition to data on shrimp production and fishing effort, fisheries can provide valuable data on monthly catches, and on how they were processed and converted into weight-derived commercial groups
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