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The behavioural homing response of adult chum salmon Oncorhynchus keta to amino‐acid profiles |
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| Authors: | J B K Leonard H Ueda |
| Institution: | 1. Biology Department, Northern Michigan University, Marquette, MI, U.S.A.;2. Division of Biosphere Science, Graduate School of Environmental Science, Hokkaido University, Sapporo, Japan;3. Laboratory of Aquatic Bioresources and Ecosystems, Field Science Center for the Northern Biosphere, Hokkaido University, Sapporo, Japan |
| Abstract: | Adult chum salmon Oncorhynchus keta homing behaviour in a two‐choice test tank (Y‐maze) was monitored using a passive integrated transponder (PIT)‐tag system in response to river‐specific dissolved free amino‐acid (DFAA) profiles and revealed that the majority of O. keta showed a preference for artificial natal‐stream water and tended to stay in this maze arm for a longer period; natal‐stream water was chosen over a nearby tributary's water, but not when the O. keta were presented with a non‐tributary water. The results demonstrate the ability of O. keta to discriminate artificial stream waters containing natural levels of DFAA. |
| Keywords: | artificial stream waters dissolved free amino acids homing behaviour PIT tag Y‐maze |