Distribuição longitudinal e sazonal da população do camarão explorado pela pesca artesanal no estuário de Macuse, Moçambique.

Abstract

This study analyzes theseasonal and longitudinal distribution of population shrimp operated by artisanal in the estuary of Macuse, Mozambique. Shrimp samples were obtained in four following fishing centers: fishing center Mualela, Muxungue, Sopinho and Macumbine the spring tide of the month and the hours of daylight during October 2017 to September 2018. We found seven species belonging two families: Palaemonidae and Penaiedae to the longitudinal particular composition, seasonal and only the species population structure Penaeidae (Fenneropenaeus indicus Parapenaeopsis sculptilis, Metapenaeus monoceros and Penaeus monodon) were analysed. The F.indicus, M. monoceros and P. sculptilis species were observed during all periods (winter and summer); more expressiveness in the winter time than in the summer and the same species were sampled in all registrars fishing centers, P. sculptilis species was also more frequent in the winter period but differed in their occurrence appearing in Macumbine fishing center. P. monodon species had a record low throughout the study and was not registered in Muxungue fishing center for both periods. Adult individuals dominated the structure of the species F. indicus population with CC measuring 30.7 ± 8,45mm for both sexes, females were more numerous than males and most females were immature. For the species M. Monoceros sub-adult individuals were dominant medium Cc23.8±9,53mm, for both sexes and numbers of females was higher than males, immature females were dominant. In the species P. sculptilis adults were most abundant medium Cc with 35, 02 ±14,17mm for both sexes, there was a greater presence of females than males, the majority of the females were observed in mature stage, and The adults dominated the species P. monodon, CC medium with 56.57 ± 18.22 and 60.2 ± 10.91 for females and males respectively, and the most mature females were observed. The Macuse estuary plays an important role for these species besides serving as a nursery can be assumed that this serves estuary habitat due to the greater amount of adults who remain in this estuary waters to adult sizes.