台湾海峡北部海域凹管鞭虾生物学特性及资源量

利用2008年5月、8月、11月和2009年2月开展台湾海峡北部虾蟹类资源调查的资料,分析了凹管鞭虾的数量分布、生物学特性,并应用资源密度法评估了其资源量。结果表明:在调查海域凹管鞭虾的平均密度指数为415.1g/h,5月、8月、11月、2月平均密度指数分为801.0g/h、491.3g/h、299.1g/h和69.0g/h,主要栖息在水深60~120m的海域,以水深80~100m海域数量为多;其体长分布范围为36~113mm,优势体长组45~75mm,雌虾个体大于雄虾个体,体重分布范围为0.6~16.3g,优势体重组2.0~6.0g;雌雄性比为1∶0.79,繁殖期在6~11月;摄食强度以1、2级为主;现存资源量为0.1059×104t,其中5月为0.2044×104t,8月为0.1254×104t,11月为0.0763×104t,2月为0.0176×104t。

The biological characteristics and resource of Solenocera koelbeli in northern Taiwan Strait

Based on the data of shrimp and crab resource surveyed in May,August,November 2008 and February 2009 in the northern Taiwan Striat,this paper analyzed the quantitative distribution and biological characteristics of Solenocera koelbeli,and assessed its resources by using the density-area method.The results showed that the average resource density was 415.1g/h,and the average resource density in May,August,November and February were 801.0g/h,491.3g/h,299.1g/h and 69.0g/h,respectively.The main water layers of habitat were found in depth of 60～120m in outer-sea,the dominant layers of distribution were in depth of 80～100m.The body length was between 36 and 113mm,the dominant range was between 45 and 75mm.The body weight was between 0.6 and 16.3g,the dominant range was between 2.0 and 6.0g.The quantity of female was obviously more than that of male,and with a sex ratio of 1∶0.79.The breeding periods were between June and November.Its food taking grade in the mass was 1-2.The resources assessment was 0.1059×104t,and it was 0.2044×104 t in May,0.1254×104t in August,0.0763×104t in November and 0.0176×104t in February.