根据2009年5月单船底层拖网和定置三重刺网作业调查资料,分析研究了诏安湾口海域春季游泳动物的种类组成、生物密度指数分布及种类多样性等.结果表明:调查海域游泳动物有48种,其中鱼类为26种,占54.2％；甲壳类为16种,占33.3％；头足类为6种,占12.5％.相对重要性指数(IRI)大于500的有4种,分别为多鳞鱚(Sillago sihama)、白姑鱼(Argyrosomus argentatus)、日本蟳(Charybdis japonica)、哈氏仿对虾(Parapenaeopsis hardwickii)；种类丰富度指数范围为1.412～3.419,平均值为2.291；Shannon-wiener多样度指数范围为0.800～2.264,平均值为1.568；种类均匀度指数范围为0.411～0.836,平均值为0.659.总体来看,诏安湾口海域生物量处于较低水平,需要开展增殖放流,通过海洋牧场与人工鱼礁建设,以逐步恢复渔业资源.%Based on data from fisheries resources investigation by otter bottom trawl and fixed trammel gillnets in waters near Zhaoan Bay mouth in May 2009, the species composition of nekton catch, stock density distribution and community diversity were analyzed. The results indicated that there were 48 species collected from the survey by otter bottom trawl and fixed trammel gillnets, including 26 fish (54. 2% ) ,16 crustacean ( 33. 3% )and 6 cephalopod (12.5% ) species. The species with index of relative importance (IRI) higher than 500 is defined as dominant species. Thus, 4 species, Sillago sihama, Argyrosomus argentatus, Charybdis japonica and Parapenaeopsis hardwickii is identified as the dominant. The catches has richness index(D)2. 29 in range of 1.412 ~ 3.419, Shannon-wienerindex(H') 1.568 in range of 0. 800 ~ 2. 264, and evenness index( J')0. 659 in range of 0.411 ~0. 836. Overall,rnfisheries resources in waters near Zhaoan Bay mouth is of low level and it needs to be enhanced and recovered withrnmean of sea ranching and artificial reef.
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