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Brittany H. Gale, Jerald B. Johnson, G. Bruce Schaalje and Mark C. Belk Effects of predation environment and food availability on somatic growth in the Livebearing Fish Brachyrhaphis rhabdophora (Pisces: Poeciliidae) Ecology and Evolution 3

Version of Record online: 7 JAN 2013 | DOI: 10.1002/ece3.459

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Theoretical predictions suggest that mean somatic growth rates and the shape of the reaction norm for growth can be influenced by variation in predator-induced mortality rates. Few studies have focused on variation in reaction norms for growth in response to resource availability between high-predation and low-predation environments. We used juvenile Brachyrhaphis rhabdophora from high-predation and low-predation environments to test for variation in mean growth rates and for variation in reaction norms for growth at two levels of food availability in a common-environment experiment, and to test for variation in growth rates in the field, we compared somatic growth rates in juveniles in high-predation and low-predation environments.

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