Vol. 10 No. 1 (2015)
Articles

Where to “Rock”? Choice of retreat sites by a gecko in a semi-arid habitat

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  • Andreia Penado,
  • Ricardo Rocha,
  • Marta Sampaio,
  • Vanessa Gil,
  • Bruno Carreira,
  • Rui Rebelo
Andreia Penado
1. School of Life Sciences, University of Sussex, Falmer, Brighton, East Sussex, BN1 9RH, United Kingdom 2. CIBIO/UP, Jardim Botânico Tropical/IICT, tv. Conde da Ribeira, 9, 1300-142 Lisboa, Portugal
Ricardo Rocha
1. Centre for Ecology, Evolution and Environmental Changes, Faculdade de Ciências da Universidade de Lisboa. 1749-016 Lisboa, Portugal. 2. Metapopulation Research Group, Faculty of Biosciences, University of Helsinki, PO Box 65 (Viikinkaari 1), FI-00014 Helsinki, Finland
Marta Sampaio
Centre for Ecology, Evolution and Environmental Changes, Faculdade de Ciências da Universidade de Lisboa. 1749-016 Lisboa, Portugal.
Vanessa Gil
Centre for Ecology, Evolution and Environmental Changes, Faculdade de Ciências da Universidade de Lisboa. 1749-016 Lisboa, Portugal.
Bruno Carreira
Centre for Ecology, Evolution and Environmental Changes, Faculdade de Ciências da Universidade de Lisboa. 1749-016 Lisboa, Portugal.
Rui Rebelo
Centre for Ecology, Evolution and Environmental Changes, Faculdade de Ciências da Universidade de Lisboa. 1749-016 Lisboa, Portugal.
DOI: https://doi.org/10.13128/Acta_Herpetol-15304

Published 2015-06-30

How to Cite

Penado, A., Rocha, R., Sampaio, M., Gil, V., Carreira, B., & Rebelo, R. (2015). Where to “Rock”? Choice of retreat sites by a gecko in a semi-arid habitat. Acta Herpetologica, 10(1), 47–54. https://doi.org/10.13128/Acta_Herpetol-15304
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Abstract

The Selvagens gecko (Tarentola boettgeri bischoffi Joger, 1984) is a medium sized gecko endemic to the Selvagens archipelago, Madeira, Portugal. The biology of this gecko is poorly known and in this study we present the first evidence regarding its habitat use. In 2010 (spring and autumn) and 2011 (spring), we collected data on the characteristics of the habitat surrounding 168 rocks used by these geckos as retreat sites, as well as on 75 randomly selected rocks. We also recorded body measurements of the individuals caught under each rock. In both seasons retreat site occupancy was found to be related to rock area, with geckos being found mainly under large rocks. Interestingly, we found that in spring heavier males, in better body condition, occupied the largest rocks and larger geckos occupied rocks closer to creek beds. Our results shed some light upon the behavioural ecology of this nocturnally active ectotherm, that spends the day under a retreat site: i) intraspecific competition may be an ecological factor prevalent in this species, since larger individuals occupy larger rocks, located in a presumably high quality micro-habitat; ii) the possibility of spring territoriality in males, that compete for good quality shelters.

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