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Journal of Ethology

, Volume 28, Issue 2, pp 405–407 | Cite as

Laboratory observation of siblicide with hatching asynchrony in an insect with parental provisioning

  • Kyoko EntoEmail author
  • Kunio Araya
  • Shin-ichi Kudo
Short Communication

Abstract

We report laboratory observation of siblicide with hatching asynchrony in the passalid beetle Cylindrocaulus patalis. Parents construct a breeding gallery in rotten logs and show complex care of offspring, including provisioning. Clutch sizes are extremely small, and only a single offspring is raised in a colony in each breeding season. We introduced field-collected colonies into an artificial gallery and recorded the behaviour of colony members. Eggs hatched at 2- to 10-day intervals in each colony. Fatal fighting invariably occurred among the larvae soon after hatching of the junior larva, and a single larva, usually the senior one, survived.

Keywords

Hatching asynchrony Sibling rivalry Siblicide Parental care Passalidae 

Notes

Acknowledgments

We thank Douglas Mock for his critical comments on earlier drafts of this paper. Constructive comments form an anonymous reviewer also improved the manuscript.

Supplementary material

Supplementary material 1 (WMV 4818 kb)

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Copyright information

© Japan Ethological Society and Springer 2010

Authors and Affiliations

  1. 1.Graduate School of Social and Cultural StudiesKyushu UniversityFukuokaJapan
  2. 2.Department of BiologyNaruto University of EducationNarutoJapan
  3. 3.Gifu World Freshwater AquariumKakamigaharaJapan

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