东海大陆架虾类资源量评估  

ASSESSMENT OF SHRIMP STOCK BIOMASS IN CONTINENTAL SHELF WATERS OF THE EAST CHINA SEA

作　　者：卢占晖[1] 薛利建[1] 张龙[1] 徐开达[1] 张亚洲[1] 

机构地区：[1]浙江省海洋水产研究所,浙江省海洋渔业资源可持续利用技术研究重点实验室,农业部重点渔场渔业资源科学观测实验站,舟山316004

出　　处：《水生生物学报》2013年第5期855-862,共8页Acta Hydrobiologica Sinica

基　　金：国家科技支撑计划(2007BAD43B01);浙江省科技厅创新团队与人才培养项目(2011F20031);浙江省省属科研院所专项计划项目(2012F30015)资助

摘　　要：根据2008年春(5月)、夏(8月)、秋(11月)、冬(2009年2月)四季东海区桁杆拖虾网调查资料,应用资源密度法首次估算了调查海域主要经济虾类和总体的现存资源量和最大持续产量(MSY)。结果表明:调查海域虾类季度平均资源密度为203.5 kg/km2。根据季节分布,以夏季最高,冬季最低;根据区域分布,南部海域最高,中部最低。调查海域虾类的现存资源量约为10.6×104t,MSY约为22.2×104t,与2008年调查海域虾类渔获量比较,表明该海域虾类资源总体利用略显不足,尚有一定潜力。在主要经济虾类的现存资源量与MSY中,以假长缝拟对虾Parapenaeus fissuroides最高;与历史资料相比,某些经济价值较高的种类,如哈氏仿对虾Parapenaeopsis hardwickii、日本对虾Penaeus japonicus等的资源量明显减少,而长角赤虾Metapenaeopsis longirostris等经济虾类较低的种类资源量有所上升,这说明东海大陆架海域虾类资源组成情况已经发生了很大改变。On the basis of data from beam shrimp trawl net surveys in four seasons of 2008 and 2009 in the East China Sea Region, the existing shrimp stock in the surveyed areas and MSY were assessed by using stock density method for the first time. The result showed that the seasonal average stock density was 203.5 kg/km2. The density was the highest in summer and the lowest in winter, and it was the highest in southern area and the lowest in middle area. The current shrimp stock was approximately 10.6×10^4t and MSY approximately was 22.2×10^4 t. The MSY was higher than the catches in 2008, which demonstrated that the shrimp resources were not fully exploited and were worthy to be further exploited. The current shrimp stock and MSY of Parapenaeus fissuroides was the highest among the main economic shrimps. The resources of the species that had more economic value such as Parapenaeopsis hardwickii and Penaeus japonicus decreased obviously, but resources of low economic species raised gradually, which indicated that the com- ponent of shrimp resources had been significantly changed in the continental shelf waters of the East China Sea.

关 键 词：虾类 资源量 扫海面积法 最大可持续产量 东海大陆架 

分 类 号：S932.5[农业科学—渔业资源]