IUCN / SSC Cat Specialist Group - Digital Cat Library
   

 

View printer friendly
Barlow, A.C.D.; Ahmed, M.I.U.; Rahman, M.M.; Howlader, A.D.; Smith, A.C.; Smith, J.L.D.
Linking monitoring and intervention for improved management of tigers in the Sundarbans of Bangladesh
2008  Biological Conservation (141): 2032-2040

Baseline data on distribution and abundance of tigers in the Sundarbans is required to identify problem areas and evaluate management strategies. This paper outlines a khal (creek) bank survey of track set frequency throughout the Bangladesh Sundarbans to aid formulation of a management-driven monitoring program. Three teams of two observers surveyed a total of 1 201 km of waterways throughout the Sundarbans, recording 1 338 tiger track sets. These sets became unrecognizable as tiger sign after a mean 10 days (range 6- 14). Proportion of detectable sign recorded was 0.91. Mean (ñstandard error) sample unit track frequency was 1.12 ñ 0.86 track sets/km of khal. The mean coefficient of variance in sample unit track rate, estimated by multiple counts of six sample units, was 0.21 (range 0.06-0.34). Track frequency generally increased from northeast to southwest. Four sample units (6%) had signs of reproduction, with a mean litter size of 1.75 ñ 0.5. Monte Carlo simulation suggests a monitoring program of one complete survey every two years will have power of 0.8 (a = 0.2), to detect track frequency declines of P19% and increases of P17%. We recommend this monitoring scheme be implemented on the Indian side of the Sundarbans to provide a standard assessment of the tiger population and to form the basis for setting management objectives and evaluating transboundary conservation initiatives.

PDF files are only accessible to Friends of the Cat Group. Joining Friends of the Cat Group gives you unlimited access and downloads in the Cat SG Library for one year, and allows you to receive our newsletter Cat News (2 regular issues per year plus special issues). More information how to join here

 

(c) IUCN/SSC Cat Specialist Group ( IUCN - The World Conservation Union)