...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Indian Journal of Fisheries >Feeding ecology and consumption rates of yellowfin tuna Thunnus albacares (Bonnaterre, 1788) in the eastern Arabian Sea
【24h】

Feeding ecology and consumption rates of yellowfin tuna Thunnus albacares (Bonnaterre, 1788) in the eastern Arabian Sea

机译：阿拉伯海东部金枪鱼Thunnus albacares（Bonnaterre，1788）的摄食生态学和消费率

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Diet composition, predator-prey relationships and consumption rates of yellowfin tuna Thunnus albacares in the western Indian Exclusive Economic Zone (eastern Arabian Sea) were studied by stomach content analysis. Stomachs of 406 specimens in the fork length range of 48 to 165.5 cm caught during exploratory longlining conducted in the eastern Arabian Sea during 2006 to 2009 were examined, of which, 15.52% were empty. Purple back flying squid (Sthenoteuthis oualaniensis) was the dominant prey species, followed by the swimming crab (Charybdis smithii), bigeye cigarfish (Cubiceps pauciradiatus) and flyingfishes (family Exocoetidae). Diet breadth index and the modified Costello diagram showed dominance of few prey species which are available in high densities in the Arabian Sea, indicating opportunistic feeding nature of this apex predator. Diet did not significantly differ between sexes and size groups. Higher food intake during premonsoon and winter monsoon indicated a seasonal variation in diet. A steady increase in the abundance of C. smithii and a decrease in the proportion of S. oualaniensis in the diet were observed from premonsoon to winter monsoon seasons. Yellowfin tuna in the Arabian Sea consume an average of 545.65 g of food in a day and require daily ration of 1.95% body weight per day.
机译：通过胃含量分析，研究了印度西部专属经济区（阿拉伯海东部）的黄鳍金枪鱼金枪鱼白鳍金枪鱼的饮食组成，食肉动物与猎物的关系以及消费率。在2006年至2009年期间，对在阿拉伯海东部进行的探索性延绳钓过程中捕获的406个标本的叉子长度在48至165.5厘米之间的胃进行了检查，其中有15.52％是空的。紫色背乌贼（Sthenoteuthis oualaniensis）是主要的猎物，其次是游泳蟹（Charybdis smithii），大眼雪茄鱼（Cubiceps pauciradiatus）和飞鱼（Exocoetidae科）。饮食宽度指数和改良的Costello图显示了在阿拉伯海中高密度可利用的少数猎物种类的优势，表明该先头天敌的投食性。性别和大小组之间的饮食差异不明显。季风和冬季风期间较高的食物摄入量表明饮食存在季节性变化。从季风季节到冬季季风季节，在饮食中观察到了史密斯梭菌的丰度稳步增加，而沙门氏菌的比例下降。阿拉伯海的黄鳍金枪鱼每天平均消费545.65克食物，每天需要的日定量为1.95％体重。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号