Survival and causes of death among released brown hares (Lepus europaeus Pallas, 1778) in Central Poland.

摘要: We describe the results of our research on population dynamics among brown hares reared in enclosures and then released into suitable natural habitat. Radio-tracking was used to follow fate 60 over a 4-year period, extending between November 2005 2009. The survival rate these animals after 12 months estimated be 37 %, with 22 tagged individuals surviving beyond 1 year post-release. highest (40 %) level mortality characterised first month release, while second period enhanced coincided breeding season (altogether accounting for 20 % rate). There no significant relationship body mass following release. A cause death predation by mammals, which accounted some 31 % all losses. Remaining causes were poaching (13 %), hits vehicles (7 %) unidentified (9 %). However, at least 40 % cases, it not possible determine date when animal died, say nothing death.