Distribution and migration of the common squidTodarodes pacificus in the Yellow Sea

Study of the distribution and migration of the common squid,Todarodes pacificus Steenstrup,basedon the index of important fishing ground(P) and fisheries statistics on the Yellow Sea and northern EastChina Sea during 1980—1991 showed that:1.Its catch in the fishing period(June to November) is 91.77% of the annual yield.The fishingground distributes over the northem and middle Yel1ow Sea and adjacent area of the Changjiang Estuary.2. It over-winters in the northem East China Sea and waters adjacent to Goto Island from De-cember to February and spawns in waters near Haijiao Is1and and west of Kyushu. The main stock mi-grates along 123°30′E to the ChangJiang Estuary, Haizhou Bay. offsea from Shidao to Qingdao,mideastern Yellow Sea, and offsea Weihai and Haiyang Island succesively for feeding after April. The sur-plus stock migrates again to the wintering ground in December.3.The favorable feeding temperature is 6-23℃(optimum of l3-20℃ in the Changjiang Estua-ry and 7-13℃ in the northern and middle Yel     

山东省海洋渔业资源增殖放流及其渔业效益

以统计调查数据及研究文献为依据,对山东省海洋渔业资源增殖放流现状及其渔业效益进行了分析,指出山东省海洋渔业资源增殖放流成效显著,但亟需加强基础研究,特别是探寻放流量和产量在外界条件下波动的耦合关系,以及加强放流前期的基础调查、放流过程的规范化研究和放流效果的定量评估等,以进一步提高增殖放流效益,增强放流管理科学性。     

山东省海洋牧场现状与发展思路

海洋牧场是一种新型海洋渔业生产方式,以生态系统构建为核心,科学开发利用海洋资源。山东省是海洋牧场建设较早省份之一,在海洋牧场创新发展方面做了大量有益探索,取得较好成效,走出了一条经济发展与环境改善双赢之路,为全国现代化海洋牧场建设做出示范引领。文章阐述了山东省海洋牧场建设历程和现状,总结了经验做法,分析了面临的机遇与挑战,并提出下一步发展思路,以期为我国海洋牧场建设与决策提供参考。