南沙群岛西南陆架区多齿蛇鲻的资源变动  

STOCK VARIATION OF SAURIDA TUMBIL IN SOUTHWESTERN CONTINENTAL OF NANSHA ISLANDS

作　　者：黄梓荣[1] 陈作志[1] 

机构地区：[1]南海水产研究所渔业资源与捕捞技术研究室,广州510300

出　　处：《海洋湖沼通报》2005年第3期50-56,共7页Transactions of Oceanology and Limnology

基　　金：农业部南海区渔政渔港监督管理局项目(200301)资助

摘　　要：根据2003年南沙西南陆架区春秋两次调查的最新资料,结合1990～1993年的调查资料,分析南沙群岛西南陆架区多齿蛇鲻的资源变动状况.结果表明,其渔获率、资源密度、资源量从1990～1993年的25.01kg/h、277.69kg/km2、24 031.19t变为2003年的7.13kg/h、93.14kg/km2、6 226.05t,渔获率有明显的季节变动,都是春季高于秋季,其密集分布水深,1990～1993年,春季为111～120m,秋季为101～110m,2003年,春季为131～140m,秋季为111～120m.渔获群体组成无论渔获体长范围和体长优势范围,都是1990～1993年比2003年大,目前渔获中Ⅰ龄鱼占多数,其现存资源量仅为原始资源量的25.21%,表明该鱼种资源已严重衰退.文中一并讨论合理利用资源的措施.Based on the survey data of Saurida tumbil collected in southwestern continental of NanSha Islands during spring and autumn in 2003, and the survey data from 1990 to 1993 also referred, the resources status and variation were analyzed. The results showed that the catch rates, the resource density and biomass changes from 25.01kg/h, 277.69 kg/km2 and 24 031.19t in 1990- 1993 to 7. 13 kg/h, 93. 14 kg/km2 and 6 226.0St in 2003. The catch rate had seasonal variation, and spring was higher than autumn. The catch rates was mainly distributed in depth of 111-120m in spring and 101-1l0m in autumn during 1990-1993, and 131-140m in spring and 111-120m in autumn in 2003. The range of catch body-length and predominant body-length in 1990-1993 was higher in 2003. The catch of age Ⅰ was predominated on currently, and the present resource quantity was only 33.24% of the original resource quantity ,it indicate this species had markedly decayed,. The utilizing measures of this species stock were also discussed in the paper.

关 键 词：多齿蛇鳎 资源变动 南沙群岛西南陆榘区 

分 类 号：Q959.467[生物学—动物学]