U. Ottosson

Detecting shifts of transmission areas in avian blood parasites - a phylogenetic approach (2007)

Hellgren, O, Waldenström, J, Perez-Tris, J, Ösi, ES, Hasselquist, D, Krizanauskiene, A, ...

We investigated the degree of geographical shifts of transmission areas of vector-borne avian blood parasites (Plasmodium, Haemoproteus and Leucocytozoon) over ecological and evolutionary timescales....

Dramatic orientation shift of white-crowned sparrows displaced across longitudes in the high arctic (2005)

Åkesson, S, Morin, J, Muheim, R, Ottosson, U

Advanced spatial-learning adaptations have been shown for migratory songbirds (1], but it is not well known how the simple genetic program encoding migratory distance and direction in young birds...

Garden Warbler Sylvia borin migration in sub-Saharan West Africa: phenology and body mass changes (2005)

Ottosson, U, Waldenstrom, J, Hjort, C, McGregor, R

The Garden Warbler is a classic subject for the study of Palaearctic-African bird migration strategies. Most studies have considered the situation close to the breeding areas, while the African and...

Differentiation and phylogeny of the olivaceous warbler Hippolais pallida species complex (2005)

Ottosson, U, Bensch, S, Svensson, L, Waldenström, J

The pattern of phenotypic and molecular variation within the polytypic olivaceous warbler H. pallida was examined. This species is distributed in the southern parts of the western Palaearctic,...

Using stable isotopes to investigate migratory connectivity of the globally threatened aquatic warbler Acrocephalus paludicola (2004)

Pain, D. J., Green, R. E., Giessing, B., Kozulin, A., Poluda, A., Ottosson, U., ...

Cross-species infection of blood parasites between resident and migratory songbirds in Africa (2002)

Waldenström, J., Bensch, S., Kiboi, S., Hasselquist, D., Ottosson, U.

We studied the phylogeny of avian haemosporidian parasites, Haemoproteus and Plasmodium, in a number of African resident and European migratory songbird species sampled during spring and autumn in...

Avian orientation: effects of cue-conflict experiments with young migratory songbirds in the high Arctic (2002)

Åkesson, S, Morin, J, Muheim, R, Ottosson, U

The migratory orientation of juvenile white-crowned sparrows, Zonotrichia leucophrys gambelli, was investigated by orientation cage experiments in manipulated magnetic fields performed during the...

Nest-attenders in the pied flycatcher (Ficedula hypoleuca) during nestling rearing: A possible case of prospective resource exploration (2001)

Ottosson, U, Bäckman, J, Smith, HG

Visits to nest holes by birds other than their owners is a familiar phenomenon for students of breeding biology. In this study, we evaluate that behavior using a transponder reading system....

Avian orientation at steep angles of inclination: experiments with migratory white-crowned sparrows at the magnetic North Pole.

Akesson, S, Morin, J, Muheim, R, Ottosson, U

The Earth's magnetic field and celestial cues provide animals with compass information during migration. Inherited magnetic compass courses are selected based on the angle of inclination, making it...