PLANT STEM DENSITY AS A CUE IN PATCH CHOICE BY FORAGING JUVENILE BLUEGILL SUNFISH

被引：15

作者：

GOTCEITAS, V ^{[1
]}

机构：

[1] QUEENS UNIV,DEPT BIOL,KINGSTON K7L 3N6,ONTARIO,CANADA

来源：

ENVIRONMENTAL BIOLOGY OF FISHES | 1990年 / 29卷 / 03期

关键词：

Feeding; Habitat structure; Lepomis macrochira; Patch selection;

D O I：

10.1007/BF00002222

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

Juvenile bluegill sunfish, Lepomis macrochira, are restricted to vegetated habitats by predators. Variation in plant stem density has a significant effect on bluegill foraging success. Given the mosaic nature of this habitat, plant stem density may provide a cue for selecting among patches in which to forage. In this study, juvenile bluegills were offered patches of artificial vegetation differing only in plant stem density as potential foraging sites. Three densities, 100, 250, and 500 stems m-2 were tested. Fish were presented with a choice between patches (100:250, 250:500, or 100:500). Bluegill foraging rate in, and the number of fish choosing each patch was recorded. Juvenile bluegills showed a preference for those patches which maximized their foraging rate. © 1990 Kluwer Academic Publishers.

引用

页码：227 / 232

页数：6

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