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Olfactory gene expression in migrating adult sockeye salmon Oncorhynchus nerka
Author(s) -
Bett N. N.,
Hinch S. G.,
Kaukinen K. H.,
Li S.,
Miller K. M.
Publication year - 2018
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/jfb.13633
Subject(s) - oncorhynchus , biology , homing (biology) , olfaction , zoology , gene , olfactory cues , fish <actinopterygii> , ecology , fishery , genetics
Expression of 12 olfactory genes was analysed in adult sockeye salmon Oncorhynchus nerka nearing spawning grounds and O. nerka that had strayed from their natal migration route. Variation was found in six of these genes, all of which were olfc olfactory receptors and had lower expression levels in salmon nearing spawning grounds. The results may reflect decreased sensitivity to natal water olfactory cues as these fish are no longer seeking the correct migratory route. The expression of olfactory genes during the olfactory‐mediated spawning migration of Pacific salmon Oncorhynchus spp. is largely unexplored and these findings demonstrate a link between migratory behaviours and olfactory plasticity that provides a basis for future molecular research on salmon homing.