Title: Environmental stress and local adaptation in Daphnia magna
Authors: Boersma, M ×
De Meester, Luc
Spaak, P #
Issue Date: Mar-1999
Publisher: Amer soc limnology oceanography
Series Title: Limnology and oceanography vol:44 issue:2 pages:393-402
Abstract: The effects of fish kairomones, crowding chemicals, and day length on the life-history traits of a set of 16 Daphnia magna clones, derived from four populations that differ in fish-predation pressure, were studied. Significant among-population differences were observed, the differences being in concordance with the hypothesis of local adaptation. The among-population genetic differences were not mediated through a change in response to fish kairomones, but through an overall smaller body size, smaller eggs, and a higher number of eggs in clones derived from habitats in which fish are present. Using a model, we show that the observed changes in life-history characteristics may lead to differences in fitness under different predation regimes, such that populations from habitats with fish have highest fitness under fish-predation regimes and populations without a fish background have higher fitness values under invertebrate predation regimes.
ISSN: 0024-3590
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Ecology, Evolution and Biodiversity Conservation Section
× corresponding author
# (joint) last author

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