The food, growth and abundance of five co-existing cyprinids in lake basins of different morphometry and water quality

被引：37

作者：

Vinni M. ^{[1
]}

Horppila J. ^{[1
]}

Olin M. ^{[2
]}

Ruuhijärvi J. ^{[2
]}

Nyberg K. ^{[1
]}

机构：

[1] Department of Limnology and Environmental Protection, Viikki (E-building), FIN-00014 University of Helsinki

[2] Finnish Game and Fisheries Research Institute, Evo Fisheries Research Station, FIN-16970 Evo

来源：

Aquatic Ecology | 2000年 / 34卷 / 4期

关键词：

Cyprinid fish; Diets; Growth rate; Water depth; Water quality;

D O I：

10.1023/A:1011404721775

中图分类号：

学科分类号：

摘要：

The food, growth and abundance of five co-existing cyprinid fish species in the eutrophic Lake Hiidenvesi were studied. The diet overlaps within the cyprinid community in shallow lake basins were compared with those in a deep basin, where littoral resources are less available. Roach, bleak and white bream inhabited both the shallow and the deep parts of the lake. Their growth rate was slow, probably due to the low availability of animal food, indicated by the increasing proportion of detritus and plant material in the diets towards the end of the summer. In the deep basin, roach and bleak, contrary to white bream, did not forage on the very abundant invertebrate Chaoborus flavicans, explained by the migration behaviour of C. flavicans. Blue bream, unlike other cyprinids, utilized copepods and had a relatively fast growth rate, but was mostly restricted to the shallow areas. The condition of the bream stock was weak both in terms of growth and abundance. The availability of zoobenthos was low and bream was not able to compete for zooplankton with the more specialized planktivores.

引用

页码：421 / 431

页数：10

共 48 条

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