Distribuiçao especial da intensidade e captura da pesca de arrasto na Costa do distrito de Inhassoro

Abstract

This study was carried out in April and October 2007, to assess the spatial distribution of trawls along the coast of the district of Inhassoro. Sampling consisted of walking along the coastline and recording the geographical coordinates of nets, catches of fish, length of fishing gear used as well as the specific composition and fresh weight of individuals. The coast of Inhassoro was divided into 18 sectors of approximately one kilometre length for the calculation of fishing effort, net density, catches and hauled area. The highest sampling effort was recorded in three sectors (in Inhassoro-sede); and the lowest was in the first sectors (in North Inhassoro), but differences in fishing density between sectors were not significant. The average catch of fish off the coast of Inhassoro was 98.7kg. Differences in catches were significant between sectors of the coast. Catches had a positive and significant linear correlation with fishing gear length and area dragged, but was not significant with net density. 104 Fish species, 1 crab species, 2 squid species and 1 shrimp species were recorded in the specific composition samples. Gerres oyena and Siganus sutor species were common and abundant in both months in terms of percentage number of individuals and in weight percentages. The species Decapterus Russelli also had high fresh weight percentages. There were different distinct species that had higher abundance and fresh weight in April and October 2007.