印度洋西北海域鸢乌贼9-10月栖息地适宜指数研究Analysis on Habitat Suitability Index of Sthenoteuthis oualaniensis in Northwestern Indian Ocean from September to October
余为,陈新军
摘要(Abstract):
印度洋西北部海域的鸢乌贼(Sthenoteuthis oualaniensis)具有一定的开发潜力,可作为商业性捕捞的对象,准确预报中心渔场可为指导生产提供依据。根据2003、2004年9~10月份期间我国鱿钓船在2°~24°N、57°~69°E海域的探捕数据,结合表温、盐度、海表面高度和叶绿素a,以CPUE作为适应性指数,利用算术平均法(AM)和几何平均法(GM)分别建立基于环境因子的综合栖息地指数模型。结果表明,9月份在栖息地指数(HSI)大于0.8的中心渔场作业次数比例超过24%,平均日产量在5.48 t/d左右;10月份在HSI大于0.8的中心渔场作业次数比例在43%以上,平均日产量在5.2 t/d以上。基于表温、盐度、海表面高度和叶绿素a的HSI模型能较好预测印度洋鸢乌贼中心渔场,且AM模型优于GM模型。
关键词(KeyWords): 鸢乌贼;栖息地模型;环境因子;渔场;印度洋
基金项目(Foundation): 国家863计划(2012AA092303);; 国家发改委产业化专项(2159999);; 上海市科技创新行动计划(12231203900)资助
作者(Author): 余为,陈新军
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