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首页> 外文期刊>Marine biology >Temporal and sexual effects in the feeding ecology of the marbled sand skate Psammobatis bergi Marini, 1932
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Temporal and sexual effects in the feeding ecology of the marbled sand skate Psammobatis bergi Marini, 1932

机译：大理石滑冰鞋Psammobatis bergi Marini在摄食生态系统中的时间和性影响，1932年

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摘要

Temporal and sexual effects in feeding ecology were examined in the marbled sand skate (Psammobatis bergi). Of 137 stomachs analysed, 130 (95%) contained food. Among these, >50% contained between 2 and 4 items, with a maximum of 18 prey items found. Thirty taxonomic levels of prey items were identified: 18 crustaceans, 5 polychaetes, 3 molluscs, 3 teleosts, and 1 chondrichthyan. Coenophthal-mus tridentatus and unidentified Brachyura were the dominant prey items by number, frequency of occurrence and index of relative importance (IRI). Libinia spinosa was the dominant item by mass and third most important by %IRI. Psammobatis bergi consumed mostly brachyurans and showed little variability in overall mean prey importance, hence, only a small number of stomachs was needed for a precise description of its dietary composition. There was no interaction between season and sex in the diet composition of P. bergi and there were no differences between the diets of males and females during winter and spring. However, a seasonal pattern was found. The most important prey in spring was C. tridentatus by number and L. spinosa by mass whereas in winter the most important prey was Peltarion spinosulum. The temporal pattern indicates that P. bergi probably modifies its diet in response to prey abundance.
机译：在大理石花纹的滑冰鞋（Psammobatis bergi）中检查了喂养生态中的时间和性影响。在分析的137个胃中，有130个（95％）包含食物。其中，> 50％的物品包含2至4件物品，最多发现18件猎物。鉴定了三十个分类等级的猎物：18个甲壳动物，5个多毛类，3个软体动物，3个硬骨鱼和1个软骨鱼类。从数量，发生频率和相对重要性指数（IRI）的角度来看，鼠齿鼠和三趾虎是最主要的猎物。按质量计，刺槐是占主导地位的项目，而％IRI是最重要的。伯氏沙门氏菌主要消耗短毛动物，总体平均猎物重要性几乎没有变化，因此，仅需少量的胃就可以精确描述其饮食组成。伯氏疟原虫的饮食组成在季节和性别之间没有相互作用，并且在冬季和春季，男性和女性的饮食之间没有差异。但是，发现了季节性模式。春季最重要的猎物是数量上的梭状芽胞杆菌（C. tridentatus），质量上是刺状多孢菌（L. spinosa），而在冬季，最重要的猎物是棘形棘皮毛虫。时间格局表明，伯氏疟原虫可能会因猎物丰富而改变其饮食结构。

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