Naturwissenschaften

, Volume 97, Issue 10, pp 945–950 | Cite as

First direct evidence of hibernation in an eastern dwarf lemur species (Cheirogaleus crossleyi) from the high-altitude forest of Tsinjoarivo, central-eastern Madagascar

Short Communication

Abstract

The nocturnal dwarf lemurs of Madagascar (genus Cheirogaleus) are the only primates known to be obligate hibernators. Although the physiology of hibernation has been studied widely in the western, small-bodied species, Cheirogaleus medius, no direct evidence of hibernation, i.e., body temperature recordings, has been reported for any of the three recognized eastern dwarf lemur species. We present skin temperature data collected by external collar transmitters from two eastern dwarf lemur individuals (Cheirogaleus crossleyi) captured in the high-altitude forest of Tsinjoarivo, central-eastern Madagascar. Our study species is larger in body size than western dwarf lemurs and inhabits much colder environments. We present the first evidence of hibernation in an eastern dwarf lemur species, and we compare the results with data available for the western species. Although the hibernation period is shorter in dwarf lemurs from Tsinjoarivo, minimum body temperatures are lower than those reported for C. medius. Both individuals at Tsinjoarivo showed limited passive and extended deep hibernation during which they did not track ambient temperature as observed in most western dwarf lemurs. Because ambient temperatures at Tsinjoarivo never exceed 30°C, dwarf lemurs have to experience arousals to maintain homeostasis during periods of hibernation. We show that large dwarf lemurs (>400 g) are capable of undergoing deep hibernation and suggest that cold, high-altitude forests may render hibernation highly advantageous during periods of food scarcity. This study has implications for understanding the physiology of hibernation in small-bodied lemurs.

Keywords

Hibernation Cheirogaleus Dwarf lemurs Tsinjoarivo Madagascar 

Notes

Acknowledgements

We are particularly thankful to Noel Rakotoniaina for assisting in all aspects of this research. Additional thanks to Jean-Luc Raharison and Mitchell Irwin for providing ambient temperature data and to Edmond and Nirina Razanadrakoto for assistance in the field. We are indebted to Laurie R. Godfrey for her help in editing this paper. This research was supported by funds from the Rufford Foundation, MMBF/Conservation International Primate Action Fund, and Primate Conservation Inc. to MBB. Research in Madagascar was facilitated by the Institute for the Conservation of Tropical Environments (ICTE, Patricia C. Wright) and the Madagascar Institute pour la Conservation des Ecosystèmes Tropicaux (MICET), especially Benjamin Andriamihaja. This research was conducted under permission of institutional and governmental agencies that regulate animal research in Madagascar.

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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  1. 1.Department of AnthropologyUniversity of MassachusettsAmherstUSA
  2. 2.Département de Paléontologie et d’Anthropologie BiologiqueUniversité d’AntananarivoMadagascarAfrica

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