Olfactory Bulbar Electrical Responses of Rainbow Trout (Salmo gairdneri) Exposed to Morpholine During Smoltification
- 1 October 1979
- journal article
- research article
- Published by Canadian Science Publishing in Journal of the Fisheries Research Board of Canada
- Vol. 36 (10) , 1186-1190
- https://doi.org/10.1139/f79-171
Abstract
Exposure of rainbow trout (Salmo gairdneri) to 5.7 × 10−10 M (5 × 10−5 mg/L) morpholine during smoking period did not influence the subsequent neural response to this substance, when tested immediately and 12 mo after smoking. No significant difference in the morpholine-induced responses was obtained between the exposed and unexposed fish. Using N-ethylmaleimide, a sulfhydryl reagent, it was further confirmed that the morpholine-effect is caused by a mechanism not directly associated with the normal olfactory function. Perfusion of the olfactory organs with 1.0 × 10−1 and 1.1 × 10−1 M (1%) morpholine for 10 min irreversibly inhibited the olfactory responsiveness to odorants. Sensitization of the olfactory bulbar electrical response is discussed in connection with homing of morpholine-imprinted salmonid fishes. Key words: olfaction, olfactory bulbar response, rainbow trout, salmon, imprinting, morpholine, homing, migrationThis publication has 0 references indexed in Scilit: