The British Herpetological Society

The Herpetological Journal is the Society's prestigious quarterly scientific journal. Articles are listed in Biological Abstracts, Current Awareness in Biological Sciences,Current Contents, Science Citation Index, and Zoological Record.

The 2017/18  impact factor of the Herpetological Journal is 1.268

pdf 09. Short term monitoring reveals the rapid decline of southern Madagascar's Critically Endangered tortoise species


Open Access

pp. 193-196
Authors: Walker, Ryan; Rafeliarisoa, Tsilavo; Currylow, Andrea; Rakotoniaina, Jean Claude & Louis Jr., Edward

Abstract: Southern Madagascar supports two of the world's most threatened chelonians, Pyxis arachnoides and Astrochelys radiata, both thought to be rapidly declining as a result of habitat loss and poaching; however, to date quantitative data on this decline is lacking. We applied a conventional distance sampling procedure, monitoring populations twice over a 24-month period across the species' respective distributions. Population density for P. arachnoides dropped from 2.4 tortoises/ha (95% CI; 1.6–3.4) to 1.5/ha (95% CI; 0.8–2.8). Astrochelys radiata dropped from 2.1 tortoises/ha (95% CI 1.2–3.5) to 1.5/h. (95% CI 0.7–3.3). Local community-based conservation initiatives need to be expanded to combat this decline.


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