Density-Dependent Phase Polyphenism in Nonmodel Locusts: A Minireview

Author:

Song Hojun1

Affiliation:

1. Department of Biology, University of Central Florida, 4000 Central Florida Boulevard, Orlando, FL 32816-2368, USA

Abstract

Although the specific mechanisms of locust phase transformation are wellunderstood for model locust species such as the desert locustSchistocerca gregariaand the migratory locustLocusta migratoria, the expressions of density-dependent phase polyphenism in other nonmodel locust species are not wellknown. The present paper is an attempt to review and synthesize what we know about these nonmodel locusts. Based on all available data, I find that locust phase polyphenism is expressed in many different ways in different locust species and identify a pattern that locust species often belong to large taxonomic groups which contain mostly nonswarming grasshopper species. Although locust phase polyphenism has evolved multiple times within Acrididae, I argue that its evolution should be studied from a phylogenetic perspective because I find similar density-dependent phenotypic plasticity among closely related species. Finally, I emphasize the importance of comparative analyses in understanding the evolution of locust phase and propose a phylogeny-based research framework.

Funder

National Science Foundation

Publisher

Hindawi Limited

Subject

Insect Science,Ecology, Evolution, Behavior and Systematics

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