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Viability selection by invertebrate predators in the polyphenic black scavenger fly Sepsis thoracica

Busso, Juan Pablo ; Blanckenhorn, Wolf U.

In: Behavioral Ecology, 2018, vol. 29, no. 4, p. 992-1000

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    Titre
    • Viability selection by invertebrate predators in the polyphenic black scavenger fly Sepsis thoracica
    Auteur
    • Busso, Juan Pablo. Department of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse, CH, Zürich
    • Blanckenhorn, Wolf U.. Department of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse, CH, Zürich
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Behavioral Ecology, 2018, vol. 29, no. 4, p. 992-1000. Oxford University Press
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:332365
    Summary
    Males of the black scavenger fly Sepsis thoracica, which breeds in livestock dung, are either small and black or large and amber. In trying to understand the evolution of this rare phenomenon, we confronted flies of different sizes and colors with invertebrate predators in different backgrounds. We found that generally larger individuals survived better and that their coloration played a secondary role. Predation cannot be the primary cause of the male dimorphism.