【摘要】 根据2006—2008年逐月在胶州湾进行的底拖网调查,对底拖网渔获物中的头足类种类组成进行了分析,利用扫海面积法评估胶州湾海域金乌贼的资源量,并调查分析了其分布特点与季节变化,对不同年份的渔获物中头足类的种类组成、资源量及生物多样性等参数的季节性变化进行了分析比较.结果表明,胶州湾金乌贼资源量有明显的季节变化,夏、秋二季的资源量明显高于其他季节,2007年秋季达到最高22.0 t,最低为2007年春季6.1 t,夏、秋二季的重量比明显高于其他季节,最高分别达到27.8%(2007)、37.7%(2006).胶州湾头足类丰富度指数在各年相同季节中较为接近,同一年份中只有冬季略低.更多还原

【Abstract】 In this study,the composition of cephalopod species in the bottom trawl catch are analyzed based on the bottom trawl surveys in Jiaozhou Bay from 2006 to 2008.The Sepia esculenta resources are assessed using sweep area method,and its distribution and seasonal variation are investigated too.The seasonal variation of cephalopod species composition,abundance and biodiversity in different years are analyzed and compared.The results show that there are obvious seasonal variations for Sepia esculenta resources in Jiaozhou Bay.The resources in summer and autumn are significantly higher than those in other seasons,with the biomass up to 22.0 t in autumn and low to 6.1 t in spring of 2007.The weight ratios in summer and autumn are significantly higher than those in other seasons,and the maxima reach 27.8%(2007) and 37.7%(2006) respectively.The richness indices of cephalopod species have little variation in the same season of different years,and in a same year the index in winter is a bit lower than those in other seasons.更多还原