Food habits of salt marsh fishes in Lake Hinuma, Ibaraki Prefecture, central Japan
Food habits of salt marsh fishes in Lake Hinuma, Ibaraki Prefecture, central Japan
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日本中部茨城县日沼湖盐沼鱼类的食性
DOI：
10.1007/s12562-016-0994-8
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发表时间：
2016
影响因子：
1.9
通讯作者：
Mitsuhiko Sano
中科院分区：
文献类型：
--
作者：
Seiya Kaneko;Kouki Kanou;Mitsuhiko Sano
为了确定盐沼鱼类的食性，对日本中部茨木县日沼湖盐沼中28种鱼类的内脏进行了调查。饮食的个体发育变化在六个物种中是明显的，包括几个具有商业重要性的物种（例如，许氏黄颡鱼和日本下锯鱼）。这些物种的较小的幼鱼主要以浮游桡足类为食，其他猎物，包括糠虾、伽马端足类和摇蚊幼虫，在较大个体的饮食中占较大比例。聚类分析的基础上的饮食重叠表明，盐沼鱼类组合包括7个饲养公会（小型底栖和附生甲壳动物，浮游动物，水生昆虫，多毛类，植物，陆生昆虫和碎屑饲养员）。其中，前两个公会的物种数量最多，表明小型底栖和附生甲壳类（例如，糠虾和伽马阶端足类）和浮游动物（例如，哲水蚤类和剑水蚤类桡足类）是研究区鱼类群落的重要食物资源。
To determine the food habits of salt marsh fishes, the gut contents of 28 species, caught from a salt marsh in Lake Hinuma, Ibaraki Prefecture, central Japan, were investigated. Ontogenetic changes in diet were apparent in six species, including several of commercial importance (e.g.,Acanthopagrus schlegeliiandHypomesus nipponensis). Smaller juveniles of such species fed mostly on planktonic copepods, with other prey items, including mysids, gammaridean amphipods and chironomid larvae, forming greater proportions in the diet of larger individuals. A cluster analysis based on dietary overlaps indicated that the salt marsh fish assemblage consisted of seven feeding guilds (small benthic and epiphytic crustacean, zooplankton, aquatic insect, polychaete, plant, terrestrial insect and detritus feeders). Among these, the first two guilds were the most abundantly represented in terms of species number, suggesting that small benthic and epiphytic crustaceans (e.g., mysids and gammaridean amphipods) and zooplankton (e.g., calanoid and cyclopoid copepods) were important food resources for the fish assemblage at the study site.