Journal of Ethology

, Volume 36, Issue 3, pp 221–228 | Cite as

Comparison of personality between juveniles and adults in clonal gecko species

  • Osamu Sakai


The developmental perspectives of animal personality enhance our understanding of how personality structure changes in relation to life stage. Clonal animals are ideal models for developmental studies because personality differences can be solely attributed to environmental factors. Here, I investigated the presence of personality within a species of clonal gecko, Lepidodactylus lugubris, at different developmental stages. For juveniles and adult geckos, I measured exploration (reaction to a novel situation) and boldness (risk-prone tendency) and evaluated repeatability and correlation of these behavioural traits. Each gecko exhibited different exploration and boldness with significant repeatability through time but no correlation between these behavioural traits. Small juveniles were composed of only bold and low explorative individuals but large juveniles and adults were composed of various personality type individuals. These results demonstrate that subject geckos have a similar personality structure across life stages and that exploration and boldness are independent personality without forming behavioural syndrome structure. Biased composition of personality type between life stages suggests that appearance of different personality type individuals during an early ontogenetic stage generates personality variation within the clonal population. This study provides developmental insight about personality structure and its composition in clonal animals living in the wild.


Animal personality Developmental stage Clonal animal Parthenogenetic gecko Lepidodactylus lugubris 



I am grateful to A. Mori for meaningful comments and discussion of my work, reviewing the manuscript, and providing accommodation near the field site. I would like to thank C. Barnett for useful comments on this manuscript. I also appreciate the support and encouragement of the members of the Laboratory of Ethology, Kyoto University. The present study was carried out in compliance with the guidelines of the Animal Care and Use Committee of Kyoto University. The field survey was conducted with permission from the Department of Agriculture, Forestry and Fisheries of Okinawa Prefecture. I declare that I have no conflicts of interest.


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Copyright information

© Japan Ethological Society and Springer Japan KK, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Zoology, Graduate School of ScienceKyoto UniversitySakyoJapan

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