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Special NREL Seminar: Henrik Andrén Special NREL Seminar, Henrik Andrén, Swedish University of Ag Sciences------------------------------ Please join us for a NREL Special Seminar on Thursday, Nov. 12, frin 11 a.m. to noon in Room B215 of the Natural and Environmental Sciences Building. Our speaker is Henrik Andrén Grimsö, Wildlife Research Station, Department of Conservation Biology, Swedish University of Agricultural Sciences, Riddarhyttan, Sweden. Title: "The Interaction Between Eurasian lynx and Roe Deer - Damped Cycles?" ------------------------------ Abstract We have studied the predation rate on roe deer by Eurasian lynx, by intensive radio tracking of lynx to get kill rate and by roe deer survey in south-central Sweden (around Grimsö Wildlife Research Station). The overall kill rate was 4.2 roe deer / month and lynx. However, male kill rate (4.2 roe deer/month) was higher than lone females (2.4 roe deer/month). Lynx family groups (mother with one or two kittens) had the highest kill rate (4.7 roe deer/month), but kill rate per lynx was about the same as for lone females. We could not find any selected for specific roe deer categories, i.e. fawns, adult females and adult males, in the roe deer killed by lynx. The estimated predation rate on a local roe deer population (1200 km2) was about 10% and we have seen a decline in the roe deer population, from 5 roe deer per km2 in 1996 to 2 roe deer per km2 in 2005 (yearly decline by 11 % since lynx re-colonized the area in 1997). On a larger geographical scale we have followed the changes in both lynx and roe deer densities during 13-years in 7 regions (between 10 000 and 20 000 km2). The interaction seems to follow Lotka-Volterra predator-prey interaction with damped cycles towards low density of both the predator and the prey. ------------------------------ Event Contact: Laurie Richards can be reached at (970) 491-1991 Sponsored by the Natural Resource and Ecology Laboratory. |
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| Calendar Name: | All University Events Calendar |
| Event Category: | Speakers/Lectures/Symposiums |
| Start Time: | 11:00 AM |
| End Time: | 11:00 PM |
| Event Begins On: | Thursday, November 12, 2009 |
| Event Ends On: | Thursday, November 12, 2009 |
| Submitter's Name: | Laurie Richards |
| Submitter's Email: | laurie@nrel.colostate.edu |
| Submitter's Phone: | (970) 491-1991 |