期刊
JOURNAL OF EXPERIMENTAL BIOLOGY
卷 225, 期 18, 页码 -出版社
COMPANY BIOLOGISTS LTD
DOI: 10.1242/jeb.244607
关键词
KEY WORDS; Atlantic herring; Migration; Sun compass orientation; Orientation behaviour
类别
资金
- Deutsche Forschungsgemeinschaft [RTG 1885, SFB1372]
- HIFMB
- Ministry of Science and Culture of Lower Saxony (MWK)
- Volkswagen Foundation [ZN3285]
Research shows that juvenile Atlantic herring may use a time-compensated sun compass for orientation during their migration. Their swimming direction is still affected even when the sky is cloudy.
Atlantic herring (Clupea harengus), an ecologically and economically important species in the northern hemisphere, shows pronounced seasonal migratory behaviour. To follow distinctive migration patterns over hundreds of kilometers between feeding, overwintering and spawning grounds, they are probably guided by orientation mechanisms. We tested whether juvenile spring-spawning Atlantic herring, caught in the western Baltic, use a sun compass for orientation just before they start leaving their hatching area. Fish were randomly divided into two groups, one of them clock-shifted 6 h backwards, to investigate whether they shift their orientation direction accordingly. Individual fish were placed in a circular bowl and their orientation was tested multiple times with the sun as a sole visual orientational cue. Our results show for the first time that juvenile Atlantic herring use a time-compensated sun compass during their migration. Their swimming direction was impaired, but still present, even when the sky was very cloudy, indicating additional orientation
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