期刊
IBIS
卷 156, 期 4, 页码 864-869出版社
WILEY
DOI: 10.1111/ibi.12172
关键词
average planetary magnetic index; Finland; sex differences; sex ratio
类别
资金
- Academy of Finland [128039]
- Waldemar von Frenkells Stiftelse
- Swedish Cultural Foundation
- US NSF [DEB-0717021, OISE-0730180, DBI-0963969, IDR-1014891]
- Vogelbescherming-Nederland/BirdLife-Netherlands through the Global Flyway Network
- Division Of Integrative Organismal Systems
- Direct For Biological Sciences [1349515] Funding Source: National Science Foundation
In many species, naive first-time migrants undertake migration without adults, supposedly on the basis of a simple' vector programme that combines an innate directional preference with a temporal programme that specifies distance. In strongly dimorphic species in which the sexes show distinct ecological requirements, the innate mechanisms of navigation may be expected to diverge between males and females with respect to their specific destinations. Based on captures of juvenile Ruff Philomachus pugnax at a migratory stopover over 21years, a correlation was found between the year-specific sex ratio and the global magnetic field disturbance during the 2weeks prior to the peak of captures in that year. This suggests that males and females respond differently to geomagnetic disturbance with changes in either the direction of migration or the level of migratory activity, and implies sex-specificity in the use of their geomagnetic navigational toolbox'.
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