|
Demographic and life-Hhstory response of moose to predator reduction| old_uid | 6244 |
|---|
| title | Demographic and life-Hhstory response of moose to predator reduction |
|---|
| start_date | 2009/02/11 |
|---|
| schedule | 11h |
|---|
| online | no |
|---|
| summary | We monitored the response of moose (2001-2007) to predator reduction, which was part of an intensive
management program for moose around McGrath, Alaska (USA). Numbers of bears (brown and black) and
wolves were reduced with the goal of increasing survival of moose. We estimated effects of predator removal on moose survival after controlling for potential effects of other
covariates (e.g., mass, weather, density).
Reduced predation resulted in increased survival of moose calves, yearlings, and adults. We also observed rapid changes in the life-history of moose. Notably, the relationship between mass of calves and survival and optimal reproductive strategies changed following predator
reduction (2003-2007). Life-history strategies for moose differ depending on the level of predation they experience and moose may experience rapid transitions from top-down
to bottom-up control. Thus, predator removal may have trophic-level consequences in this ecosystem.
Sedinger, J.S, N.D. Chelgren, D.H. Ward, and M.S. Lindberg. 2008. Fidelity and breeding probability related to population
density and individual quality in black brent geese (Branta bernicla nigricans). Journal of Animal Ecology 77:702-712.
Citta, J.J., and M.S. Lindberg. 2007. Nest-site selection of passerines: effects of geographic scale and public and personal information. Ecology 88:2034-2046.
Lindberg, M.S., D.H. Ward, T.L. Tibbitts, and J. Roser. 2007. Winter movement dynamics of black brant. Journal of Wildlife Management 71:534-540. |
|---|
| responsibles | Lebreton |
|---|
| |
|