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中文摘要：
根据2014年2月至2015年5月对江苏省连云港以东海州湾南部海域共24个站点进行的4个航次的拖网渔业资源调查,对渔获物中的鱼类进行分类鉴定,分析了该海域的鱼类种类组成和资源密度时空分布情况。分析结果认为,海州湾南部连云港海域的渔获共有2纲15目47科77属98种,主要为鲈形目、鲉形目、鲽形目和鲱形目的种类,鲈形目的种类在不同季节中除了冬季外,均超过了总数的50%,不同站点的鱼类种类分布也呈现出不同的规律,但是在统计上不存在差异（ANOVA,P〈0.01）;每个季节的优势种均不超过4种,春季和冬季以中上层的小型鱼类为主,夏季和秋季以经济性鱼类为主,春季的重量资源密度最高,夏秋季其次,最低为冬季;而冬季的数量资源密度最高,其次为春夏季,秋季最低,相对资源密度在离岸站点和沿岸站点有所不同,但不同季节和不同站点均不存在差异。春季渔获物多样性指数最高,其次为夏秋季,冬季最低,不同站点的多样性指数不存在差异,但是不同季节对不同站点的影响存在显著差异。目前海州湾海域的渔业资源量稳定,但是捕捞过度和人为因素的影响仍在持续,今后应该继续执行休渔制度,限定最小网目,同时合理适度地开发新兴鱼种渔业,更好地保护和利用海洋生物资源。
英文摘要：
According to the four cruises of fisheries survey conducted in south Haizhou bay, eastward of Lianyungang in Jiangsu Province, all the catch fish species from bottom trawl of 24 stations were identified to species level, and the spatial and temporal distributions of species composition were analyzed.The results showed that 98 species were collected from the south Haizhou bay, involving 2 class, 15 orders, 47 families and 77 genera.Most of the fish species belong to Perciforme, Scorpaeniforme, Pleuronectiformes and Clupeiforme.More than 50% of the total species belong to Perciforme in different seasons except for winter, different stations also showed different patterns in species composition, although difference was not tested in statistical analysis;the dominant species were less than four species in every season, pelagic species dominated in spring and winter, and commercial species were commonly dominated in summer and autumn.The highest weight density occurred in spring, then summer and autumn, winter is the lowest;however, the highest individual density occurred in winter, followed by spring and summer, and autumn was the lowest.The density differences between near-shore and off-shore were also revealed in this study without any statistical difference.Margalef diversity index was analyzed with highest value in spring, followed by summer and autumn, winter had a relatively low species composition.The value of indices showed different patterns in different stations without significant difference.The protection of fisheries resources in Haizhou bay has been kept at a stable level.Closed fishing system should be maintained and the minimum net size should also limited.Sustainably developing some novel fisheries should be considered to better utilize the marine resources.
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