Document Detail

Geomagnetic imprinting predicts spatio-temporal variation in homing migration of pink and sockeye salmon.
MedLine Citation:
PMID:  25056214     Owner:  NLM     Status:  In-Data-Review    
Animals navigate using a variety of sensory cues, but how each is weighted during different phases of movement (e.g. dispersal, foraging, homing) is controversial. Here, we examine the geomagnetic and olfactory imprinting hypotheses of natal homing with datasets that recorded variation in the migratory routes of sockeye (Oncorhynchus nerka) and pink (Oncorhynchus gorbuscha) salmon returning from the Pacific Ocean to the Fraser River, British Columbia. Drift of the magnetic field (i.e. geomagnetic imprinting) uniquely accounted for 23.2% and 44.0% of the variation in migration routes for sockeye and pink salmon, respectively. Ocean circulation (i.e. olfactory imprinting) predicted 6.1% and 0.1% of the variation in sockeye and pink migration routes, respectively. Sea surface temperature (a variable influencing salmon distribution but not navigation, directly) accounted for 13.0% of the variation in sockeye migration but was unrelated to pink migration. These findings suggest that geomagnetic navigation plays an important role in long-distance homing in salmon and that consideration of navigation mechanisms can aid in the management of migratory fishes by better predicting movement patterns. Finally, given the diversity of animals that use the Earth's magnetic field for navigation, geomagnetic drift may provide a unifying explanation for spatio-temporal variation in the movement patterns of many species.
Nathan F Putman; Erica S Jenkins; Catherine G J Michielsens; David L G Noakes
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of the Royal Society, Interface / the Royal Society     Volume:  11     ISSN:  1742-5662     ISO Abbreviation:  J R Soc Interface     Publication Date:  2014 Oct 
Date Detail:
Created Date:  2014-07-24     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101217269     Medline TA:  J R Soc Interface     Country:  England    
Other Details:
Languages:  eng     Pagination:  -     Citation Subset:  IM    
Copyright Information:
© 2014 The Author(s) Published by the Royal Society. All rights reserved.
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