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Postovipositional maternal care in the burrower bug, Adomerus rotundus (Hemiptera: Cydnidae)

Published online by Cambridge University Press:  27 February 2014

Kouichi Inadomi
Affiliation:
Department of Applied Biological Sciences, Faculty of Agriculture, Saga University, Saga 840-8502, Japan
Maiko Wakiyama
Affiliation:
Department of Applied Biological Sciences, Faculty of Agriculture, Saga University, Saga 840-8502, Japan
Mantaro Hironaka
Affiliation:
Department of Biology, Faculty of Medicine, Hamamatsu University School of Medicine, Handayama 1-20-1, Higashi-ku, Hamamatsu, Shizuoka 431-3192, Japan
Hiromi Mukai
Affiliation:
Department of Applied Biological Sciences, Faculty of Agriculture, Saga University, Saga 840-8502, Japan
Lisa Filippi
Affiliation:
Department of Biology, Hofstra University, Hempstead, New York 11549, United States of America
Shintaro Nomakuchi*
Affiliation:
Department of Applied Biological Sciences, Faculty of Agriculture, Saga University, Saga 840-8502, Japan
*
1Corresponding author (e-mail: nomakuch@cc.saga-u.ac.jp).

Abstract

Complex subsociality involving guarding, progressive provisioning, and trophic egg production behaviours in herbivorous Hemiptera is known in only a few genera in the Cydnidae subfamily Sehirinae and in Parastrachiidae. Because progressive provisioning and trophic egg production are apparently specific to these closely related species, phylogenetically it seems likely that the behaviours emerged once in the common ancestor of this clade. However, the scarcity of information on species in the clade precludes any reliable exploration of this hypothesis. To ameliorate this situation, it is necessary to accumulate additional information for as many related species as possible. To this end, we first targeted Japanese representatives of the genus Adomerus Mulsant and Rey (Hemiptera: Cydnidae), three species of which are distributed in Japan. Complex subsocial behaviours in two of these species, Adomerus triguttulus (Motschulsky) and Adomerus variegatus (Signoret), have been well characterised and analysed. The third Japanese species, Adomerus rotundus (Hsiao), was identified to display complex maternal care, but, with the exception of egg hatch synchronisation, parental behaviours have not been characterised. In this study, we examined the parental behaviours of A. rotundus. Additional investigations on subsocial behaviours, in addition to morphological and molecular analyses, should gradually clarify whether the complex subsociality represents a homologous or convergent adaptation.

Résumé

La subsocialité complexe, qui implique des comportements de gardiennage, d'approvisionnement progressif et de production d’œufs trophiques, chez les hémiptères herbivores n'a été signalée que chez un petit nombre de genres de Cydnidae de la sous-famille des Sehirinae et de Parastrachiidae. Puisque l'approvisionnement progressif et la production d’œufs trophiques semblent être spécifiques à ces espèces phylogénétiquement proches parentes, il paraît vraisemblable que ces comportements soient apparus à une seule reprise chez l'ancêtre commun de ce clade. Cependant, le peu d'informations disponibles sur ce clade empêche toute exploration sérieuse de cette hypothèse. Afin de remédier à la situation, il est nécessaire d'accumuler des renseignements supplémentaires sur le plus grand nombre possible d'espèces apparentées. À cette fin, nous avons d'abord ciblé les représentants japonais du genre Adomerus Mulsant et Rey (Hemiptera: Cydnidae) dont trois espèces se retrouvent au Japon. Les comportements complexes de subsocialité ont été bien décrits et analysés chez deux de ces espèces, A. triguttulus (Motschulsky) et Adomerus variegatus (Signoret). On sait que la troisième espèce japonaise, Adomerus rotundus (Hsiao), exhibe un comportement maternel complexe, mais ces comportements parentaux n'ont jamais été décrits à l'exception de l’éclosion synchrone des œufs. Notre étude examine les comportements parentaux d’Adomerus rotundus. Des recherches additionnelles sur les comportements subsociaux, en plus des analyses morphologiques et moléculaires, devraient graduellement permettre d’élucider si la subsocialité complexe est une adaptation homologue ou convergente.

Type
Behaviour & Ecology
Copyright
Copyright © Entomological Society of Canada 2014 

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Footnotes

Subject editor: Véronique Martel

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