journal article Jan 01, 1979

Modification of the Rheotropic Behavior of Male Rainbow Trout (Salmo gairdneri) by Ovarian Fluid

Abstract
The upstream orientation and frequency of upstream movement of ripe male rainbow trout (Salmo gairdneri) in the presence of ovarian fluid obtained from spawning females of the same species were observed and quantified. In a stream tank, male trout moved upstream in the ovarian fluid odor plume. In an optomotor tank, male trout exhibited an increase in the frequency of upstream orientation and movement in the presence of diffuse, nondirectional ovarian fluid. It is concluded that water currents provide directional cues and olfactory stimuli regulate the orientational and kinetic components of the rheotropic response. The significance of this mechanism of orientation in fish migration is discussed. Key words: rheotropism, behavior, olfaction, orientation, migration, ovarian fluid
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Cited By
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Journal of Experimental Biology
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47
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Published
Jan 01, 1979
Vol/Issue
36(1)
Pages
63-68
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Cite This Article
Mary E. Emanuel, Julian J. Dodson (1979). Modification of the Rheotropic Behavior of Male Rainbow Trout (Salmo gairdneri) by Ovarian Fluid. Journal of the Fisheries Research Board of Canada, 36(1), 63-68. https://doi.org/10.1139/f79-008
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