CAJ | 학술논문

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10.6×104 t, MSY约为22.2×104 t,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。
근거2008년춘(5월)、하(8월)、추(11월)、동(2009년2월)사계동해구항간타하망조사자료,응용자원밀도법수차고산료조사해역주요경제하류화총체적현존자원량화최대지속산량(MSY)。결과표명：조사해역하류계도평균자원밀도위203.5 kg/km2。근거계절분포,이하계최고,동계최저；근거구역분포,남부해역최고,중부최저。조사해역하류적현존자원량약위10.6×104 t, MSY약위22.2×104 t,여2008년조사해역하류어획량비교,표명해해역하류자원총체이용략현불족,상유일정잠력。재주요경제하류적현존자원량여MSY중,이가장봉의대하Parapenaeus fissuroides최고；여역사자료상비,모사경제개치교고적충류,여합씨방대하Parapenaeopsis hardwickii、일본대하Penaeus japonicus등적자원량명현감소,이장각적하Metapenaeopsis longirostris 등경제하류교저적충류자원량유소상승,저설명동해대륙가해역하류자원조성정황이경발생료흔대개변。
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 10.6×104 t and MSY approximately was 22.2×104 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.