Impacto da pesca artesanal de arrasto na comunidade de ervas marinhas e sua relação com pescaria de peixe no distrito de Inhassoro Província de Inhambane

Abstract

The study on the impact of artisanal trawl fishing on seagrass community, was carried out over twenty days in the month of November. This study covered four fishing centres of the Inhassoro district coastline, two from the southern zone Mahoche and Mucocoene and two from the northern zone namely Fequete and Petane. In each fishing centre, 3 trawls were monitored for a total of 12 trawls. All plant material removed by the trawls was weighed, then dumped in the sampling site and two replicates of a 2kg sample were randomly taken; after washing, the collected sample was grouped in dead material, algae and seagrass, the seagrass was properly identified and weighed by species. A 10kg fish sample was also extracted from each trawl for specific composition. In the trawls in Inhassoro District, 06 species of seagrass were identified and removed during the trawl fisheries. seagrass species removed during fishing: ^ciliatum A Çí rotundata, hemprichii, H. uninervis and S. isoetifolium. Qjciliatum and C. serrulata were the species most removed by trawls in the two zones studied in Inhassoro district, for T. ciliatum in the southern zone (14.47g/trawl; dp= 12.36) and in the northern zone (4.72g/trawl; dp= 1.33). The presence of the species Thalassodendron ciliatum and Cymodocea serrulata in 4 sampled fishing centres was accompanied by the capture of fish of the species Siganus sutor and Pelates quadrilineatus. There were no significant differences between the diversity indices of the 4 fishing centres studied: Mahoche, Mucocene, Fequete and Petane.(TRADUÇAO NOSSA)