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首页> 外文期刊>Estuarine Coastal and Shelf Science >Trophic organisation and predator-prey interactions among commercially exploited demersal finfishes in the coastal waters of the southeastern Arabian Sea
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Trophic organisation and predator-prey interactions among commercially exploited demersal finfishes in the coastal waters of the southeastern Arabian Sea

机译：阿拉伯海东南沿海水域商业开发的深海有鳍鱼类之间的营养组织和食肉动物与猎物的相互作用

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摘要

Trophic interactions in commercially exploited demersal finfishes in the southeastern Arabian Sea of India were studied to understand trophic organization with emphasis on ontogenic diet shifts within the marine food web. In total, the contents of 4716 stomachs were examined from which 78 prey items were identified. Crustaceans and fishes were the major prey groups to most of the fishes. Based on cluster analysis of predator feeding similarities and ontogenic diet shift within each predator, four major trophic guilds and many sub-guilds were identified. The first guild 'detritus feeders' included all size groups of Cynoglossus macrostomus, Pampus argenteus, Leiognathus bindus and Priacanthus hamrur. Guild two, named 'Shrimp feeders', was the largest guild identified and included all size groups of Rhynchobatus djiddensis and Nemipterus mesoprion, medium and large Nemipterus japonicus, P. hamrur and Grammo-plites suppositus, small and medium Ototithes cuvieri and small Lactarius lactarius. Guild three, named 'crab and squilla feeders', consisted of few predators. The fourth trophic guild, 'piscivores', was mainly made up of larger size groups of all predators and all size groups of Pseudorhombus arsius and Carch-arhinus limbatus. The mean diet breadth and mean trophic level showed strong correlation with ontogenic diet shift. The mean trophic level varied from 2.2 ± 0.1 in large L. bindus to 4.6 ± 0.2 in large Epinephelus diacanthus and the diet breadth from 1.4 ± 0.3 in medium P. argenteus to 8.3 ± 0.2 in medium N. japonicus. Overall, the present study showed that predators in the ecosystem have a strong feeding preference for the sergestid shrimp Acetes indicus, penaeid shrimps, epibenthic crabs and detritus.
机译：研究了印度东南部阿拉伯海的商业开发的有鳍鱼类的营养相互作用，以了解营养组织，重点是海洋食物网中的个体饮食变化。总共检查了4716个胃的内容，从中识别出78个猎物。甲壳类和鱼类是大多数鱼类的主要猎物。基于捕食者相似性和每个捕食者内个体饮食变化的聚类分析，确定了四个主要的营养行会和许多子行会。最早的公会“碎屑饲养者”包括所有大小的食蟹舌，天竺葵，白纹夜蛾和白头翁。第二个被称为“虾类饲养者”的协会是最大的协会，包括所有大小的Rhynchobatus djiddensis和Nemipterus mesoprion，中型和大型Nemipterus japonicus，P。hamrur和Grammo-plites栓剂，中小型Ototithes cuvieri和小型Lactarius。 。公会三，被称为“蟹和squilla饲养者”，由很少的捕食者组成。第四个有营养的行会，“食肉动物”，主要由较大规模的所有天敌组成，包括所有的捕食者以及所有大小的伪狂犬和角鲨。平均饮食宽度和平均营养水平与个体饮食结构变化密切相关。平均营养水平从大型链球菌的2.2±0.1到大型石斑鱼的4.6±0.2，日粮的宽度从中等假单胞菌的1.4±0.3到中等日本猪笼草的8.3±0.2。总体而言，目前的研究表明，生态系统中的天敌对the虾，印度虾，对虾，表皮蟹和碎屑有强烈的食性。

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