Survival and causes of death among released brown hares Lepus europaeus Pallas, 1778 in Central PolandReport as inadecuate




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Acta Theriologica

, Volume 57, Issue 4, pp 305–312

First Online: 02 May 2012Received: 22 November 2011Accepted: 18 April 2012

Abstract

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

KeywordsBrown hare Lepus europaeus Radiotelemetry Survival Mortality Communicated by: Emerson Vieira

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Author: Magdalena Misiorowska - Michał Wasilewski

Source: https://link.springer.com/







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