antiantianti
Well-Known Member
Predation by foxes, stoats, pine martens and some bird species can cause chick mortality and breeding failures. Reducing predation rates may lead to increases in black grouse productivity, though it is not always necessary: in some areas, increases in black grouse numbers have been achieved without controlling predation.
Any effort to remove predators must also consider potential relationships between predators: removing one predator, such as the fox, may increase the number of another, such as stoat, as they have increased access to food sources because of diminished competition. There are two options to reduce predation rates:
(a) to increase the opportunities for black grouse to avoid predators, through habitat management (such as providing increased vegetation cover);
(b) to remove the predators.
Controlling predation is most likely to be effective when undertaken over a wide area, so requiring the involvement of several landholdings.
Any effort to remove predators must also consider potential relationships between predators: removing one predator, such as the fox, may increase the number of another, such as stoat, as they have increased access to food sources because of diminished competition. There are two options to reduce predation rates:
(a) to increase the opportunities for black grouse to avoid predators, through habitat management (such as providing increased vegetation cover);
(b) to remove the predators.
Controlling predation is most likely to be effective when undertaken over a wide area, so requiring the involvement of several landholdings.