POPULATION-DYNAMICS AND FOOD OF BLEAK (ALBURNUS-ALBURNUS L) IN THE LITTORAL-ZONE OF LAKE BALATON, HUNGARY

被引:15
作者
BIRO, P
MUSKO, IB
机构
[1] Balaton Limnological Research Institute, Hungarian Academy of Sciences, Many
关键词
POPULATION STRUCTURE; DYNAMICS; GUT-CONTENTS; LITTORAL FOOD-WEBS;
D O I
10.1007/BF00015532
中图分类号
Q17 [水生生物学];
学科分类号
071004 ;
摘要
Intra- and interspecific effects together with changing environmental conditions regulate the dynamics of the fragile bleak populations in Lake Balaton. Size- and age-structures, length-weight relationships and mortality were studied on 1493 individuals and growth history were determined using scales from 703 specimens. The population growth rate was slow and the basic population parameters showed area variations along the longitudinal axis of the lake. Gut contents were analyzed in 224 individuals. The bleak stocks are trophically strongly related to the littoral zooplankton and benthos; and they play a significant energy-mediating role in the food-webs between the periphytic communities and fish assemblages in the littoral zone of Lake Balaton.
引用
收藏
页码:139 / 149
页数:11
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