LIFE-HISTORY CHARACTERISTICS OF DAPHNIA-MAGNA CLONES DIFFERING IN PHOTOTACTIC BEHAVIOR

被引:18
作者
DEMEESTER, L
机构
[1] Laboratory of Animal Ecology, University of Ghent, Gent, B-9000
关键词
CLONE; DAPHNIA; LIFE HISTORY; OFFSPRING SIZE; PHOTOTAXIS; VERTICAL MIGRATION;
D O I
10.1007/BF00032009
中图分类号
Q17 [水生生物学];
学科分类号
071004 ;
摘要
In an analysis of a life table experiment involving positively, intermediately and negatively phototactic Daphnia magna clones, life history traits such as the average duration of the adult instar, neonate and adult body size were found to be correlated with phototactic behaviour. The size of the eggs and neonates was positively correlated with adult body size, and with egg development time. Adult body size was positively correlated with the size of the second and subsequent clutches. I argue that the intrinsic positive correlation between offspring size and egg development time is a key factor structuring the differences in life history patterns observed between the positively and intermediately phototactic Daphnia genotypes, and that the two life history patterns are to be considered alternatives suited for different environmental conditions (e.g. habitats with and without strong predation pressure on adults).
引用
收藏
页码:167 / 175
页数:9
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