Friederike Woog

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Adaptive radiation is the rapid diversification of a single lineage into many species that inhabit a variety of environments or use a variety of resources and differ in traits required to exploit these. Why some lineages undergo adaptive radiation is not well-understood, but filling unoccupied ecological space appears to be a common feature. We construct a(More)
Changes in morphology have been postulated as one of the responses of animals to global warming, with increasing ambient temperatures leading to decreasing body size. However, the results of previous studies are inconsistent. Problems related to the analyses of trends in body size may be related to the short-term nature of data sets, to the selection of(More)
Stonechats (genus Saxicola) are passerine birds with an extraordinarily large breeding distribution. Recent studies provide strong evidence that the taxon shows far greater geographic differentiation than originally suspected, with African, Siberian and European stonechats forming distinct, monophyletic groups that have been suggested to be species in their(More)
Avian malaria occurs almost worldwide and is caused by Haemosporida parasites (Plasmodium, Haemoproteus and Leucocytozoon). Vectors such as mosquitoes, hippoboscid flies or biting midges are required for the transmission of these parasites. There are few studies about avian malaria parasites on Madagascar but none about suitable vectors. To identify vectors(More)
The effect of age and size, and partner age and size combinations on reproductive success in Hawaiian Geese (Branta sandvicensis) were examined. Clutch size and the number of eggs hatched increased initially with age in males and females, then levelled off and declined in older birds. Some older females, however, had large clutches and hatched a high(More)
Although many parrot species are decreasing in their native range, introduced parrot populations can be found in urban areas around the globe. We thus need to understand how they adapt to this novel environment and to assess the possibility of a range expansion that might threaten native species. We studied population growth, nest site requirements, as well(More)
Peck rates (pecks/min) were used to compare the relative frequencies of food intake of Greylag Geese (Anser anser) of different gosling ages and of different social statuses. As the goslings grew up, their peck rates increased, and by the time of fledging they had reached the level of nonbreeders. Parent birds pecked the fastest. This may be due to the fact(More)
Avian malaria parasites (Plasmodium spp.) and other Haemosporida (Haemoproteus and Leucocytozoon spp.) form a diverse group of vector-transmitted blood parasites that are abundant in many bird families. Recent studies have suggested that corvids may be an important host for Plasmodium spp. and Leucocytozoon spp. To investigate the diversity of Haemosporida(More)
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