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Fletta eftir höfundi "Nielsen, Ólafur K."

Fletta eftir höfundi "Nielsen, Ólafur K."

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    Feather holes of rock ptarmigan are associated with amblyceran chewing lice 
    Stenkewitz, Ute; Nielsen, Ólafur K.; Skirnisson, Karl; Stefansson, Gunnar (Bio One, 2017-06)
    Feather holes have traditionally been suggested to be feeding traces of chewing lice (mallophagans). There is controversy whether mallophagans are the real source of feather holes. We studied mallophagan infestations and holes in tail feathers of 528 ...
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    Host-Parasite Interactions and Population Dynamics of Rock Ptarmigan 
    Stenkewitz, Ute; Nielsen, Ólafur K.; Skirnisson, Karl; Stefánsson, Gunnar (Public Library of Science (PLoS), 2016-11-21)
    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. ...