• 作者：Cindy F. Baker ; John C. Montgomery ; Todd E. Dennis
• 关键词：Chemotaxis ; Fish ; Lateral line ; Olfactory ; Rheotaxis
• 刊名：Journal of Comparative Physiology A: Sensory, Neural, and Behavioral Physiology
• 出版年：2002
• 出版时间：August 2002
• 年：2002
• 卷：188
• 期：7
• 页码：553-560
• 全文大小：202 KB

Abstract. The sensory basis of olfactory search behavior was investigated in the banded kokopu, Galaxias fasciatus, using a flow tank. In the presence of a 2 cm s^-1 current flow, banded kokopu use both water current and chemical information to locate a food odor source. The superficial neuromasts of the lateral line system mediate the rheotactic component of the odor search. A physical block of one olfactory nostril did not affect the olfactory search strategy employed by banded kokopu in still water or in the presence of a current flow. Thus, there is no evidence that banded kokopu perform a bilateral comparison of the olfactory stimulus during their odor search. Previously, olfaction and gustation have been the only sensory systems shown to directly mediate orientation and movement towards odor sources in fish. The use of hydrodynamic cues by fish in location of an olfactory source has been previously proposed, but without direct experimental identification of the sensory systems employed. This study identifies the contributing roles of both olfactory and hydrodynamic sensory systems to the olfactory search repertoire of fish.