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首页> 外文期刊>Estuarine Coastal and Shelf Science >Feeding habits of the deep-snouted pipefish Syngnathus typhle in a temperate coastal lagoon
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Feeding habits of the deep-snouted pipefish Syngnathus typhle in a temperate coastal lagoon

机译：温带沿海泻湖中深食pipe鱼Synnathus触角的摄食习性

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摘要

Feeding habits of Syngnathus typhle were determined based on monthly sampling during experimental fishing in a coastal lagoon (Ria Formosa, South Portugal) from April 2001 to May 2002. The gut contents of 856 individuals were analysed and quantified with numerical and gravimetric methods, as well as with some complementary indices and measures (vacuity, fullness and relative importance). In this study, this species fed mainly on Copepoda, Mysidacea, small caridean grass shrimps (Hippolytidae and Palaemonidae) and small fishes (Gobiidae) and to a lesser degree on other small invertebrates. No significant differences were found between the diets of males and females. However, significant differences in the fullness indexes of both sexes were observed during the reproductive period. Significant differences in the diet among seasons were also verified but no seasonal trends were discovered. Snout length showed a linear increase with growth while mouth area and total length displayed an allometric relation. Mouth shape varied between an ellipse and an almost perfect circle. The increase in mouth area and snout length as 5. typhle grows contributed to the observed ontogenic diet shift with specimens smaller than IQlbrn feeding almost exclusively on Copepoda, medium sized specimens feeding mainly on Hippolytidae and Mysidacea, while larger specimeAkpreyed on Hippolytidae, Palaemonidae and Gobiidae. Prey size generally increased with size of S. typhle.
机译：根据2001年4月至2002年5月在沿海泻湖（Ria Formosa，南葡萄牙）进行的实验性捕鱼期间的每月采样，确定了Syngnathus触角的摄食习惯。还使用数值和重量分析法对856头肠道动物的肠内容物进行了分析和定量分析。以及一些补充性的指标和措施（空缺，丰满度和相对重要性）。在这项研究中，该物种主要以Co足目，Mysidacea，小型Caridean草虾（Hippolytidae和Palaemonidae）和小型鱼类（Gobiidae）为食，其次以其他小型无脊椎动物为食。男性和女性饮食之间没有发现显着差异。但是，在生育期，男女的饱满指数存在显着差异。还证实了季节之间饮食的显着差异，但未发现季节趋势。口鼻部的长度随生长呈线性增加，而口部面积和总长度则呈异形关系。嘴形在椭圆形和几乎完美的圆形之间变化。口齿面积和口鼻部长度的增加为5。口虱的生长有助于观察到的个体饮食变化，小于IQlbrn的标本几乎只以Co足类为食，中型标本主要以H科和Mysidacea为食，而较大的标本以Hippolytidae，Palaemonidae和Gobiidae为食。猎物的大小通常随S.Typhle的大小而增加。

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