open access

https://hdl.handle.net/2115/32926

Olfactory Discriminating Ability of Lacustrine Sockeye and Masu Salmon in Various Freshwaters

英語

2000-04

日本動物学会

Zoological Science

17(3)

313-317

In order to study the olfactory discriminating ability of lacustrine sockeye salmon (Oncorhynchus nerka) and masu salmon (O. masou), the integrated olfactory nerve response to various freshwaters was recorded by electrophysiological techniques. In both species independent of sex and gonadal maturity, each freshwater caused a different olfactory response. Source and effluent waters of the culture pond at Toya Lake Station (the source and culture pond waters) evoked the minimum and maximum response magnitude, respectively. In cross-adaptation experiments, the culture pond water abolished all secondary responses to other freshwaters, and no freshwater abolished the secondary response to the culture pond water. The concentration response study revealed that the minimum concentration (threshold) to induce response to the culture pond water after adaptation to Lake Toya water was between 0.1 and 1.0%. The present study indicates that the olfactory organ of lacustrine salmonids may discriminate different intensities of various freshwater odors.

学術雑誌論文

Version of Record

(c) 日本動物学会 / 本文献の公開は著者の意思に基づくものである

0289-0003