库克群岛海域海洋环境因子对大眼金枪鱼渔获率的影响  

Effects of environmental variables on catch rates of Thunnus obesus in waters near Cook Islands

作　　者：宋利明[1,2,3,4] 赵海龙[1] 谢凯[1] 李冬静[1] 

机构地区：[1]上海海洋大学海洋科学学院,上海201306 [2]国家远洋渔业工程技术研究中心,上海海洋大学,上海201306 [3]大洋渔业资源可持续开发省部共建教育部重点实验室,上海海洋大学,上海201306 [4]远洋渔业协同创新中心,上海海洋大学,上海201306

出　　处：《水产学报》2015年第8期1230-1241,共12页Journal of Fisheries of China

基　　金：国家“八六三”高技术研究发展计划(2012AA092302);农业部远洋渔业探捕项目(D8006128005,D8006138016);上海市教育委员会科研创新项目(12ZZ168);高等学校博士学科点专项科研基金联合(20113104110004)

摘　　要：为了掌握库克群岛海域海洋环境因子对延绳钓渔业中大眼金枪鱼渔获率的影响,实验利用2013年9月8日—12月31日在库克群岛海域作业的延绳钓渔业调查数据,所获数据包括：钓钩深度数据,温度、叶绿素a浓度、三维海流的垂直剖面数据,作业参数,渔获统计数据,采用逐步回归的方法建立钓钩预测深度计算模型,利用统计和聚类分析的方法分析大眼金枪鱼渔获率与海洋环境因子的关系。结果发现,在库克群岛附近海域,大眼金枪鱼渔获率较高的水层、温度、叶绿素a浓度、东西海流、南北海流、水平海流和垂直海流分别为120.0~199.9 m、13.0~14.9℃、0.200~0.239μg/L、0.1~0.2 m/s、-0.2~0 m/s、0.1~0.4 m/s和0.04~0.05 m/s。在该海域作业、以大眼金枪鱼为目标鱼种时,建议在大眼金枪鱼渔获率较高的水层、温度、叶绿素a浓度、水平海流和垂直海流范围内增加钓钩投放数量。For a better understanding the effects of environmental variables on catch rates of bigeye tuna（ Thunnus obesus）,the catch rates of bigeye tuna and environmental variables were collected in longlining surveys in waters near Cook Islands from Sept. 8,2013 to Dec. 31,2013. Data included： hook depth data,temperature and chlorophyll-a concentration,three-dimensional sea current vertical profile data,operating parameters and catch data. Stepwise regression was used to develop the hook depth calculation model.Statistics and clustering analysis were used to analyze the effects of environmental variables on bigeye tuna catch rate. Results showed that the depth,temperature,chlorophyll-a concentration,east- west current,south- north current,horizontal current and vertical current range with the high catch rate for bigeye tuna were120. 0 ~ 199. 9 m,13. 0 ~ 14. 9 ℃,0. 200 ~ 0. 239 μg / L,0. 1 ~ 0. 2 m / s,- 0. 2 ~ 0 m / s,0. 1 ~ 0. 4 m / s,and0. 04 ~ 0. 05 m / s,respectively. Results suggested that more hooks should be deployed in the environmental variables＇ range with the high bigeye tuna catch rate when fishing in the waters near Cook Islands and targeting bigeye tuna.

关 键 词：大眼金枪鱼 渔获率 环境因子 库克群岛 

分 类 号：S931.3[农业科学—渔业资源]