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Research Article

Phenology and reproductive cycles in Mexican aphodiine dung beetles (Coleoptera: Scarabaeidae: Aphodiinae: Aphodiini)

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Pages 173-185 | Accepted 13 Apr 2022, Published online: 16 May 2022
 

Summary

The phenology and reproductive cycles of seven Mexican Aphodiini dung beetles are studied. The highest abundances of individuals occurred during the wet and warm season of the year, coinciding with the long summer. Their abundance is reduced or beetles are in diapause, depending on the species, during the dry and cold months that mainly corresponded to winter. Five species are univoltine, and females and males emerge mature after the first rains arrive, reproduce and then they enter diapause until the following year. One species is bivoltine and is found from the beginning of the wet season until the onset of winter. The other species is multivoltine and found almost all year round, although the highest abundances are found during the summer when generations overlap. The abundances of three of the species occurring at different localities are compared.

Résumé. Phénologie et cycles de reproduction chez plusieurs aphodiens du Mexique (Coleoptera : Scarabaeidae : Aphodiinae : Aphodiini)

La phénologie et les cycles de reproduction de sept espèces d'Aphodiens du Mexique ont été etudiés. Les plus grandes abondances s’observent pendant la saison humide qui coïncide avec l'été qui est long et chaud. Pendant les mois secs et froids qui correspondent principalement à l'hiver, l’abondance est réduite ou elles sont en diapause. Cinq espèces sont univoltines ; dès les premières pluies les femelles et les mâles émergent en étant matures, et se reproduisent, puis ces espèces entrent en diapause jusqu'à l'année suivante. L’une des espèces est bivoltine, elle est active du début de la saison humide jusqu'au début de l'hiver. La dernière espèce étudiée est multivoltine, elle est active pendant presque toute l'année, bien que les plus grandes abondances aient été observées pendant l'été et que les générations se chevauchent. Les phénologies des trois espèces les plus abondantes sont comparées entre plusieurs localités.

Acknowledgements

Thank the Instituto de Ecología, A. C. for its financial support. Mayvi Alvarado O., Tania Pensado C., Concepción Ramírez S. and Ricardo Madrigal Ch. for their help in the field and in the laboratory. The authors are indebted to Sara Lariza Rivera G. for preparing the figures and tables and to David Edmonds for editing the English manuscript. We thank also the anonymous referees whose insightful suggestions improved this article.

Disclosure statement

No potential conflict of interest was reported by the author(s).

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