Individual study: Ecotypic variation in recruitment of reintroduced bighorn sheep: Implications for translocation
Wiedmann B.P. & Sargeant G.A. (2014) Ecotypic variation in recruitment of reintroduced bighorn sheep: Implications for translocation. The Journal of Wildlife Management, 78, 394-401
This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.
Translocate animals from source populations subject to similar climatic conditions
A study in 2006–2011 of scrubland across a large area in North Dakota, USA (Wiedmann & Sargeant 2014) found that bighorn sheep Ovis canadensis translocated from populations subject to a similar climate to the recipient site reared more offspring, compared to those translocated from areas with a milder climate. Sheep from an area with a climate similar to the recipient site had a higher average annual recruitment (0.6 juveniles/adult female) than did sheep originating from a milder climate area (0.2 juveniles/adult female). Thirty-nine bighorn sheep originating from Montana, where climate was similar to the recipient site, were release in North Dakota in 2006–2007. Their annual recruitment was compared with that of sheep released between 1956 and 2004, which originated from stock from British Columbia, Canada. Recruitment was assessed by direct observations of radio-tracked sheep, annually, in late summer and the following March of 2006–2011.
(Summarised by Nick Littlewood)