Abstract
High-mountain endemics with very restricted ranges are likely to have a high risk of extinction under the various scenarios of global warming. Endemic to the high mountains of the St Katherine Protectorate in South Sinai (Egypt), the Sinai Hairstreak Satyrium jebelia is just such a species. For the first time, its population size was estimated and its distribution and that of its larval food plant (Rhamnus dispermus) were mapped. The total world population in 2012 was estimated to be 1,010 individuals, perhaps divided into six smaller sub-populations of varying size. Its moderate dispersal ability and the relatively close proximity of the sub-populations may indicate metapopulation structure, but more data are needed. Aspects of host-plant and habitat quality were significant predictors of the presence of Sinai Hairstreaks on individual trees. No immediate threats are evident except global warming: if current climate-change predictions for Egypt are correct, the quality of habitat and plant diversity will decrease in the St Katherine Protectorate, with obvious long-term conservation implications.
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Acknowledgments
We thank the Egyptian Environmental Affairs Agency and Mr. Mohamed Qotb, manager of the St Katherine Protectorate, for permission to do the work. Dr. Sabrine Rashed of the St Katherine Protectorate generously shared her knowledge of the butterfly and host-plant, as did our expert local Bedouin guides Nasr Mansour and Suleiman Abusada. We are grateful to Brian Power, Peter Cutler and Féaron Cassidy for help with the fieldwork, and Dubi Benyamini for advice on finding the butterflies. We thank Luke McLeod, Olivia Norfolk, Stine Simensen and Katy Thompson for field support and companionship, and Farag Mahmoud and everyone at Fox Camp for logistical help. We thank two anonymous referees for their comments which greatly improved the manuscript.
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Power, A., Zalat, S. & Gilbert, F. Nowhere left to go: the Sinai Hairstreak Satyrium jebelia . J Insect Conserv 18, 1017–1025 (2014). https://doi.org/10.1007/s10841-014-9707-8
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DOI: https://doi.org/10.1007/s10841-014-9707-8