Population cycles and kin selection in Red Grouse Lagopus lagopus scoticus

摘要: Populations of Red Grouse Lagopus lagopus scoticus often show cyclic fluctuations in numbers. There is good evidence from previous work that, each year, densities are limited by the territorial behaviour cocks. Therefore, changes and associated territory size might cause density one year to next. Demographic measurements a population experiment were consistent with model which explained cycles as consequence resulting kin selection: differential between non-kin. The demographic presented here covered 16 years two cyclic-type fluctuations, lasted 10 years. Long-term studies essential if lengthy processes be understood reliably.