| host-parasite interactions and population dynamics of rock ptarmigan. | populations of rock ptarmigan (lagopus muta) in iceland fluctuate in multiannual cycles with peak numbers c. every 10 years. we studied the ptarmigan-parasite community and how parasites relate to ptarmigan age, body condition, and population density. we collected 632 ptarmigan in northeast iceland in early october from 2006 to 2012; 630 (99.7%) were infected with at least one parasite species, 616 (98%) with ectoparasites, and 536 (85%) with endoparasites. we analysed indices for the combined p ... | 2016 | 27870855 |