Abstract
MORE than two thousand years ago, Aristotle wrote that all the actions of animals are for breeding, for feeding and to avoid extremes 1. Clearly such motivations of migration satisfy those who ask why animals migrate; but have they been verified and are they verifiable? Are they still accepted as explanations of migration, the only problem being to discover how the animal can accomplish wonderful feats? Has such an attitude been successful in elucidating migration? The statements that for birds "this question has been extolled as a mystery of mysteries"2 and that for the salmon migration is accomplished by "an instinct which man cannot comprehend" 3 are not reassuring.
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HUNTSMAN, B. Salmon and Animal Migration. Nature 161, 300–302 (1948). https://doi.org/10.1038/161300a0
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DOI: https://doi.org/10.1038/161300a0