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          Institute: MPI für Evolutionsbiologie     Collection: Ecophysiology     Display Documents

ID: 208292.0, MPI für Evolutionsbiologie / Ecophysiology
Alternative antipredator defences and genetic polymorphism in a pelagic predator-prey system
Authors:De Meester, Luc; Weider, Lawrence J.; Tollrian, Ralph
Date of Publication (YYYY-MM-DD):1995-11-30
Title of Journal:Nature
Issue / Number:6556
Start Page:483
End Page:485
Review Status:not specified
Audience:Not Specified
Abstract / Description:DIEL vertical migration (DVM) of zooplankton is generally considered to be a predator-avoidance strategy: zooplankton migrate to greater depths during the day to reduce their chance of being detected by visual predators (fish)(1). Both phenotypic plasticity and interpopulational genetic variability in DVM patterns exist in zooplankton(2,3). We used large indoor mesocosms ('plankton towers'(4)) to study intrapopulational genetic variation for day depth in a Daphnia hyalina x galeata hybrid population. Clones differing in body size also differed in vertical distribution, with the largest clone residing at the greatest depth during the day. A selection experiment in the presence of fish indicates that alternative antipredator strategies, which involve a complex association between habitat-selection traits and life-history strategies, might be an important factor underlying intrapopulational genetic polymorphism in zooplankton, through a balancing of fitness effects in the presence of visual predators
External Publication Status:published
Document Type:Article
Affiliations:MPI für Evolutionsbiologie/Abt. Planktonökologie
External Affiliations:STATE UNIV GHENT, ANIM ECOL LAB, GHENT, B-9000 BELGIUM; Laboratory of Ecology and Aquaculture, Catholic University of Leuven, Naamsestraat 59, 3000 Leuven, Belgium; Zoological Institute, Ludwig-Maximilian-Universität, Karlstrasse 25, 80333 München, Germany
Identifiers:ISSN:0028-0836 [ID-No:1]
LOCALID:1542/S 36960 [Listen-Nummer/S-Nummer]
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