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Movement patterns of stream fishes in a Ouachita Highlands stream: an examination of the restricted movement paradigmAuthor(s): Elizabeth B. Smithson; Carol E. Johnston
Source: Transactions of the American Fisheries Society. 128: 847-853
Publication Series: Miscellaneous Publication
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DescriptionThe restricted movement paradigm (RMP), which states adult fish do not move out of a pool or restricted stream reach, does not fully define the movements of stream fishes. Although stream fishes may spend the majority of their time in a home pool, they also make regular exploratory trips away from the home pool. Recapture of Ouachita Highlands stream fish marked with passive integrated transponder (PIT) tags showed that the majority of the uniquely marked fish in this study were in the pools of initial collection. The following percentages of marked fish were recaptured outside the pool of initial collection: 12 percent of creek chub Semotilus atromaculatus; 33 percent of blackspotted topminnow Fundulus olivaceus; 12 percent of green sunfish Lepomis cyanellus; and 14 percent of longear sunfish Lepomis megalotis. Standard lengths and weights did not differ significantly between nonmobile and mobile recaptured fish, and patterns of multiple recaptures indicated exploratory, round-trip movements. Such regular exploratory trips suggest that the area of use by and critical habitat for stream fishes may be greater than commonly estimated.
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CitationSmithson, Elizabeth B.; Johnston, Carol E. 1999. Movement patterns of stream fishes in a Ouachita Highlands stream: an examination of the restricted movement paradigm. Transactions of the American Fisheries Society. 128: 847-853
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