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Dispersal dynamics: Distribution of lady beetles (Coleoptera: Coccinellidae)

Key words. Balanced dispersal, Coccinella septempunctata, habitat choice, ideal free distribution, matching principle

Abstract. This article studies coccinellid dispersal in heterogeneous environments using some hypotheses on dispersal rates that correspond to empirical observations. It is assumed that emigration rates increase with decreasing patch payoff that is measured either as the number of aphids per a lady beetle, or as the number of aphids only. Three scenarios for immigration are considered: individuals choose patches unconditionally, immigration is proportional to patch quality, and immigration is proportional to patch payoff. Coccinellid spatial distributions corresponding to ...

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