Oecologia

, Volume 96, Issue 1, pp 80–84

Inbreeding and outbreeding depression in Daphnia

  • Luc De Meester
Original Papers

Abstract

Egg-to-adult viability of sexual offspring in Daphnia magna is lower for selfed (average: 43.0%) than for outcrossed families (average: 74.7%). This suggests that intraclonal mating is not the rule in Daphnia populations. For a given family, hatching rate of eggs resulting from interpopulation crosses is lower than for intrapopulation crosses. This breakdown in hatching responses may result in the effective gene flow between Daphnia populations being severely reduced, offering an explanation for the apparent paradox of genetic differentiation of Daphnia populations in spite of efficient dispersal.

Key words

Daphnia Inbreeding depression Outbreeding depression Hatching Local differentiation 

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Copyright information

© Springer-Verlag 1993

Authors and Affiliations

  • Luc De Meester
    • 1
  1. 1.Laboratory of Animal EcologyUniversity of GhentGentBelgium

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