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首页> 外文期刊>Aquatic Living Resources >Effects of a targeted shrimp (Penaeus notialis) exploitation on fish catches in the Gambia estuary
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Effects of a targeted shrimp (Penaeus notialis) exploitation on fish catches in the Gambia estuary

机译：有针对性的对虾（对虾）开发对冈比亚河口渔获量的影响

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Results of an annual survey of fishing activities and catches in the Gambia estuary (200 km long), carried out from June 2001 to May 2002, indicated that fishing effort targets mainly (66% of fishing trips) shrimps. As a result of the globalisation of fish markets, the fishery has become a quasi mono-exploitation of shrimp for exporting. At the opposite, fishing activities focusing on fish were low and carried out with large and medium mesh drift nets, gill nets and surrounding nets (17% of fishing trips), handlines and longlines (15%). The annual catch, estimated at 2350 tonnes for the estuarine part of the River Gambia, consisted of 1800 t of fish and 550 t of shrimp. Stownets were the most efficient gear accounting for 50% of the total production (550 t of shrimp and 600 t of fish) while other significant techniques were mainly drift nets (21%), longlines (11%) and gillnets (5%). Fish catches were composed with 55 fish species among which 16 species accounted for 90% of the annual catch. The average catch length of these first sixteen species was 295 mm, clearly demonstrating that fishing for fish was targeting large fish. The effects of the targeted shrimp exploitation resulted in a low fishing effort for fish leading to low fish landings and consequently to an under exploitation of fish resource in the Gambia estuary.
机译：2001年6月至2002年5月对冈比亚河口（长200公里）进行的年度捕捞活动和捕获量的年度调查结果表明，捕捞努力主要针对（占捕捞行程的66％）虾。鱼类市场全球化的结果是，渔业已成为对虾的准单一开发，用于出口。相反，针对鱼类的捕捞活动较少，并使用大中型网状漂网，刺网和周围的网（占捕鱼行程的17％），手钓和延绳钓（15％）进行。冈比亚河口部分的年度产量估计为2350吨，其中包括1800吨鱼和550吨虾。 Stownets是最高效的渔具，占总产量的50％（虾550吨，鱼类600吨），而其他重要技术主要是流网（21％），延绳钓（11％）和刺网（5％）。渔获物由55种鱼类组成，其中16种占年度渔获量的90％。这头16个物种的平均捕捞长度为295毫米，这清楚地表明，捕鱼是针对大型鱼类的。有针对性的虾类开采的影响导致对鱼类的捕捞努力减少，导致鱼类上岸量减少，从而导致冈比亚河口鱼类资源的开发不足。

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