Análise bio-econômica dos defesos do camarão rosa (Penaeus subtilis) na costa norte do Brasil.

Abstract

Shrimp constitutes an important fishery resource. Although they can be found at sea world-wide, tropical an subtropical regions show a great number of especies of high commercial value. On the north coast Brazil, the fisheries of penaeidae species (mainly Penaeus subtilis) represents 95 % of the catch in this geographic region, which has a large contribution to the exportation USA and Japan. From a data analysis of production, which was initially divided into categories, such as size (small, medium, big) and year (1982 to 1994), and groups comprising the period prior to defense (1982 to 1986), after the first defense period (1991 to 1994), it was conclued that the fishing effort was constant in almost all studied periods, and during the period of defense there is no protection to the recruitment of juveniles, which can cause an overfishing of small shrimps. Erom the three analyzed periods the late defense time, when fisheries were probibited on february, showed a total icome 18,5 % superior to the periods with no defense, and 23 % superior to the period between 1991 to 1994, which leads to the necessity of modification of the defense time to the months of January to March. During this time the incidence of matured individuals is much representative and consequently this would lead to an increased profitability.