Predator-induced phenotypic variation in the pattern of growth and reproduction 
in Daphnia hyalina (Crustacea: Cladocera)

Stibor, H.; Lüning, J.

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Predator-induced phenotypic variation in the pattern of growth and reproduction in Daphnia hyalina (Crustacea: Cladocera)

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Stibor, H.
Department Ecophysiology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society;

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https://doi.org/10.2307/2390117
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Stibor, H., & Lüning, J. (1994). Predator-induced phenotypic variation in the pattern of growth and reproduction in Daphnia hyalina (Crustacea: Cladocera). Functional Ecology, 8(1), 97-101.

Cite as: https://hdl.handle.net/11858/00-001M-0000-000F-E39D-9

Abstract

1. The life-history patterns of the cladoceran Daphnia hyalina, widely distributed throughout northern temperate lakes, were observed to vary in the presence of different size-selective predators. 2. These changes were apparently initiated by waterborne cues released by predators. 3. In the presence of a cue released by predators preferring large adult D. hyalina, the daphnids reproduced at a smaller size and used a higher percentage of resources for reproduction than in the absence of this cue. The opposite was observed when daphnids were exposed to a cue originating from a predator preferring small juvenile D. hyalina. 4. The chemically induced responses in life-history traits took place within one generation of a single clone. 5. These results are in agreement with demographic theories concerning direct effects of size-selective predation on prey and are interpreted as adaptive responses to seasonal predators.