Serengeti: arrest of poachers has an effect

Serengeti National Park: Ray Hilborn et al report that the number of poachers arrested has been recorded since 1957. It is possible to correlate buffalo, black rhino and elephant population recovery with "effective enforcement in a conservation area".

Science (24th November 2006) 314 (5803) Page 1266

DOI: 10.1126/science.1132780
http://www.sciencemag.org/cgi/content/abstract/314/5803/1266

Supporting online material:
www.sciencemag.org/cgi/content/full/314/5803/1266/DC1 in PDF format (9 pages)
http://www.sciencemag.org/cgi/data/314/5803/1266/DC1/1