闽东外海细点圆趾蟹数量分布及生物学特性  

The Biomass Distribution and Biological Characteristic of Ovalipes Punctatus in The Eastern Fujian Outer-sea

作　　者：叶泉土[1] 张壮丽[1] 叶孙忠[1] 

机构地区：[1]福建省水产研究所,福建厦门361012

出　　处：《福建水产》2004年第4期47-51,共5页Journal of Fujian Fisheries

基　　金：福建省海洋与渔业局资助 [闽水科 972 1号 ]

摘　　要：本文根据 1998年 5月～ 1999年 2月闽东北外海虾蟹类资源探捕调查资料 ,报道了闽东北外海细点圆趾蟹的数量分布和生物学特性。结果表明 :细点圆趾蟹的时空分布差异很大。从时间上看 ,夏季资源密度指数最高 ,达 10 .17kg/h ,秋季资源密度指数为最低 ,仅 0 .0 5kg/h ;从分布海域看 ,主要分布在 2 6°0 0′～2 7°0 0′N ,12 2°0 0′～ 12 3°0 0′E ,水深 10 0～ 12 0m一带海域。研究结果还表明 ,细点圆趾蟹甲宽范围为 2 5～12 5mm ,平均甲宽为 84 .6mm ,雌性个体平均甲宽 75 .2mm ,雄性为 90 .1mm ,雄性个体明显大于雌性个体。雌性初次性成熟个体最小甲宽为 6 3mm ,体重为 76g ,大量性成熟甲宽范围为 75～ 90mm ,体重范围为 95～115g。目前该海区细点圆趾蟹资源状况尚好 ,可供进一步开发利用。Based on the resource survey data for shrimps and crabs in East China Sea during May 1998 to February 1999, this paper reported the biomass distribution and the biological characteristic of Ovalopes punctatus in the eastern Fujian outer-sea. The results showed that the biomass distribution in time and space were obviously different.The highest density of resource occurred in summer, and its value was 10.17kg/h.The lowest density of resource occurred in autumn, and its value was 0.05kg/h,the density in summer was 203 times as high as in autumn. From the point of view of their area distribution,they mainly distributed in the waters from 26°00′to 27°00′N and 122°00′to 123°00′E with water depth from 100 to 120m.The results also indicated that the carapace width of Ovalopes punctatus varied between 25 and 125 mm, and the average was 84.6mm. The average carapace width was 75.2mm for female and 90.1mm for male, and the male individual was obviously larger than the female. The carapace width of mature individuals of female for the first time is 63mm and 76g in body weight, and most of them were between 75 to 90mm in carapace width and between 95 to 115g in body weight. The resource status of Ovalopes punctatus in the region was good at present and can be further utilized.

关 键 词：资源密度 生物学特性 性成熟 闽东北外海 数量分布 海区 秋季 雌性 雄性 蟹类 

分 类 号：S932.4[农业科学—渔业资源] Q959[农业科学—水产科学]