Apr 16, 2020

Egg cannibalism by passion vine specialist Disonycha Chevrolat beetles (Coleoptera: Chrysomelidae: Galerucinae: Alticini)

BioRxiv : the Preprint Server for Biology
Zong Hong ZhangQiongyi Zhao

Abstract

Cannibalistic behavior is now recognized to be an important component of nutritional ecology in both carnivorous and herbivorous species, including many beetle families (Englert and Thomas 1970; Beaver 1974; Dickinson 1992; Bartlett 1987; Alabi et al. 2008). This habit was historically viewed by as an incidental outcome of unnaturally crowded laboratory situations with little or no ecological importance (Fox 1975), but it is increasingly acknowledged that cannibalism represents a potentially advantageous behavior (Richardson et al. 2010). Here we report on multiple cases of egg cannibalism, or conspecific oophagy, by adults of two species of passion vine (Passiflora Linnaeus: Passifloraceae) specialist flea beetles in the genus Disonycha Chevrolat (Coleoptera: Chrysomelidae: Galerucinae: Alticini). This is the first report of egg cannibalism from the Galerucinae, and to our knowledge, only the fourth report of egg cannibalism by adults in the Chrysomelidae; the other three reports are on adult Chrysomelinae species eating conspecific eggs. We conclude this note with several questions that this observation raises, followed by observations and hypotheses that may contribute to explaining the reasons that this behavior happens.

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Mentioned in this Paper

Computer Software
Study
Microarray Analysis
Genes
DEGS1 wt Allele
Nucleic Acid Sequencing
Reverse Transcriptase Polymerase Chain Reaction
Sequencing
Massively-Parallel Sequencing
Analysis

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