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Journal of avian biology v.48 no.1, 2017년, pp.6 - 18   SCI SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Magnetic compass orientation research with migratory songbirds at Stensoffa Ecological Field Station in southern Sweden: why is it so difficult to obtain seasonally appropriate orientation?

Muheim, Rachel (Dept of Biology, Center for Animal Movement Ecology (CAnMove), Lund Univ., Sweden ) ; Åkesson, Susanne (Dept of Biology, Center for Animal Movement Ecology (CAnMove), Lund Univ., Sweden ) ; Bäckman, Johan (Dept of Biology, Center for Animal Movement Ecology (CAnMove), Lund Univ., Sweden ) ; Sjöberg, Sissel (Dept of Biology, Center for Animal Movement Ecology (CAnMove), Lund Univ., Sweden ) ;
  • 초록  

    More than three decades ago, Thomas Alerstam initiated the study of orientation and navigation of migratory songbirds in southern Sweden. Stensoffa Ecological Field Station, located approx. 20 km east of Lund, has since been a primary location for orientation experiments. However, it has often been difficult to record well‐oriented behaviour in the seasonal appropriate migratory directions, in particular in magnetic orientation experiments under simulated overcast or indoors. Here, we summarise all available experiments testing magnetic compass orientation in migratory songbirds in southern Sweden, and review possible explanations for the poor magnetic compass orientation found in many studies. Most of the factors proposed can be essentially excluded, such as difficulties to extract magnetic compass information at high latitudes, methodological or experimenter biases, holding duration and repeated testing of individual birds, effects of magnetic anomalies and temporal variations of the ambient magnetic field, as well as anthropogenic electromagnetic disturbances. Possibly, the geographic location of southern Sweden where many birds captured and/or tested at coastal sites are confronted with the sea, might explain some of the variation that we see in the orientation behaviour of birds. Still, further investigations are needed to conclusively identify the factors responsible for why birds are not better oriented in the seasonal appropriate migratory direction at Stensoffa.


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