Estudo de duas espécies comerciais de camarão - penaeus indicus H. Milne Edwards , 1833 e metapenaeus monoceros fabricius 1798- capturadas nas pescarias artesanal e semi-industrial da baía de Maputo

Abstract

During 1989, a study was carried out on two commercial shrimp species, respectively Penaeus indicus and Metapenaeus monoceros, caught in Maputo bay by semi-industrial artisanal fishermen using the trawl net. The total shrimp catch was estimated at around 131 tons for artisanal fishing and 123 tons for semi-industrial. These values ​​correspond to a catch/day/boat of 10.1 kg and 49.2. Kg for artisanal and semi-industrial fisheries respectively and represent about half of 1985 estimates. Growth, mortality and logging pattern were estimated based on the ELEFAN software package, using carapace length frequencies. The growth parameters provided the following annual values: L00=49.00 mm; -K=1.430 and L00=57.00 mm; K=1.169 respectively for males and females of the species penaeus indicus and L00=41.18 mm; K=1.76 and L00=53.30; K=1.265 for males and females of the species Metapenaeus monoceros. The results obtained for the remaining parameters indicate that the stock is not overexploited. The reduction in catches seems to be related to the decrease in fishing effort, however: more information is needed for a more accurate estimate. (TRADUÇÃO NOSSA)