Oecologia

, Volume 92, Issue 2, pp 162–165 | Cite as

Predator induced life-history shifts in a freshwater cladoceran

  • Herwig Stibor
Original Papers

Summary

Life-history theory predicts that maturity and resource allocation patterns are highly sensitive to selective predation. Under reduced adult survival, selection will favour genotypes capable of reproducing earlier, at a smaller size and with a higher reproductive effort. When exposed to water that previously held fish, (size selective predators which prefer larger Daphnia), individuals of Daphnia hyalina reproduced earlier, at a smaller size and had a higher reproductive investment. Hence the prey was able to switch its life history pattern in order to become less susceptible to predation by a specific predator. The cue that evokes the prey response is a chemical released by the predator.

Key words

Daphnia Predator induction Life-history strategy Resource allocation Phenotypic plasticity 

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Copyright information

© Springer-Verlag 1992

Authors and Affiliations

  • Herwig Stibor
    • 1
  1. 1.Max-Planck-Institut für LimnologieAbteilung ÖkophysiologiePlönFederal Republic of Germany

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