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Free-swimming coho salmon fry Oncorhynchus kisutch of some families showed preference (relative to the behaviour of nave sibs) for the odours of similarly aged non-sibs to whom they had been exposed during the post-hatch (alevin) stage and the early free-swimming (fry) stage, but not the embryo (egg) stage, indicating that odour-learning had occurred during the later developmental periods. Recognition...
Juvenile coho salmonOncorhynchus kisutchfrom the Quinsam, Big Qualicum and Puntledge Rivers, British Columbia, Canada, discriminated between the chemical emanations of similarly aged salmon from their own and another population. However, common rearing during the embryonic, larval and early free-swimming stages rendered families more attractive to each other than they were otherwise. Preference among...
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