007431 Chowfin S M (NO, C/o The Gadoli and Manda Khal Wildlife Conservation Trust, PO Bo. 27, Pauri, District Pauri Garhwal, Uttarakhand-246 001, Email: schowfin@yahoo.com) : Gharial estimation and habitat assessment survey 2008, Corbett Tiger Reserve, Uttarakhand, India: field survey report. Cheetal 2011, 49(3), 96-104.
The gharial, Gavialis gangeticus, is a charismatic, endemic crocodilian of the North Indian Subcontinent. Amongst the rarest members of its order, the species was recently upgraded from "Endangered" to "Critically Endangered", (IUCN 2007) and the strength of wild breeding population has been recently estimated as not exceeding 200 individuals. (Whitaker and Members of GMTF, 2007). A study was undertaken to assess the gharial, Gavialis gangeticus population and its reproductive status in the Corbett Tiger Reserve (CTR) in 2008 in association with the Uttarakhand Forest Department. Within CTR, a total of 101 individuals were observed during 2008 with a size class distribution of 10 adult males, 32 adults, 10 juveniles and 2 yearlings. Mugger crocodiles and freshwater turtles were also observed during the course of the survey co-occurring in many areas with gharial. Evidence of recent successful reproduction is indicated by the presence of young individuals and / or recent nesting with direct confirmation of reproductive activity in 2008 evidenced by observations of recent nesting activity, nests, and/or predated nests. In CTR, nesting success appears to be adversely affected by water level fluctuations in the reservoir, limiting available nesting sites and producing horizontal and / or vertical separation of the nests from the proximity of the water due to receding water levels within the main reservoir. In addition, cattle disturbance and or nest predation may further limit nest success.
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