Ecomorphological correlates in ten species of subtropical seagrass fishes: diet and microhabitat utilization
Ecomorphological correlates in ten species of subtropical seagrass fishes: diet and microhabitat utilization
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十种亚热带海草鱼类的生态形态相关性：饮食和微生境利用
DOI：
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发表时间：
1995
影响因子：
1.4
通讯作者：
Bradley T. Eggold
中科院分区：
文献类型：
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作者：
P. Motta;Kari B. Clifton;P. Hernández;Bradley T. Eggold
概要 在十种远亲亚热带海草鱼中寻找生态形态相关性。通过主成分分析、聚类分析和膳食数据的典型对应分析，比较与喂养和微生境利用相关的形态测量数据。除了一组中层水浮游滤食性动物外，形态学通常不能很好地预测饮食。物种沿形态轴的分离似乎与微生境利用更多相关，从而产生了三个主要类群：（1）一群专门用于巡航和寻找逃避猎物的浮游营养型中水鱼类，其特征是压缩的梭形身体、分叉的尾鳍、长且间隔紧密的鳃耙，短到中等！胸鳍长，胸鳍尖，侧眼大，头短，有末端或近末端的嘴； (2) 游动缓慢、机动性较差的表栖鱼类，它们会从基质上拾取或吸食猎物。它们由更圆的尾鳍和胸鳍以及短的鳃耙或没有鳃耙结合在一起。 (3)一群移动性更强、操作性更强的表层觅食者，其特征是身体更压缩、呈半球形、长而尖的胸鳍、分叉的尾鳍、大的侧眼、近末端的嘴和更大的下颌突出性。在某些群体中，营养和微生境利用特征趋同的情况很明显。
SynopsisEcomorphological correlates were sought among ten species of distantly related subtropical seagrass fishes. Morphometric data associated with feeding and microhabitat utilization were compared by principal components analysis, cluster analysis, and canonical correspondence analysis to dietary data. Morphology was generally a poor predictor of diet except for a group of mid-water planktotrophic filter feeders. Separation of the species along morphological axes appears to be related more to microhabitat utilization resulting in three major groups: (1) a group of planktotrophic, mid-water fishes specialized for cruising and seeking out evasive prey characterized by a compressed fusiform body, forked caudal fin, long, closely spaced gill rakers, short to intermediate! length pectoral fin, pointed pectoral fin, large lateral eye, short head, and a terminal or subterminal mouth; (2) slow swimming, less maneuverable epibenthic fishes that pick or suck their prey off the substrate. They are united by more rounded caudal and pectoral fins, and short or no gill rakers; and (3) a group of more mobile and maneuverable epibenthic foragers characterized by a more compressed, sub-gibbose body, long, pointed pectoral fins, forked caudal fins, large lateral eyes, subterminal mouth, and greater jaw protrusibility. Cases of convergence in trophic and microhabitat utilization characters were apparent in some of the groups.