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Movements of creek chubs, Semotilus atromaculatus , among habitat patches in a plains stream
Author(s) -
Belica L. A. T.,
Rahel F. J.
Publication year - 2008
Publication title -
ecology of freshwater fish
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 55
eISSN - 1600-0633
pISSN - 0906-6691
DOI - 10.1111/j.1600-0633.2007.00277.x
Subject(s) - habitat , ecology , fishery , fish <actinopterygii> , geography , biology
– We studied summer movement patterns of creek chubs, Semotilus atromaculatus, in a low‐gradient, sand‐bottomed stream on the western plains of the United States. Creek chubs were highly associated with patches of cover consisting of wood or macrophytes. Movements among 37 patches in a 1.1‐km segment were assessed in a mark‐recapture study. Over 2‐week intervals, 44% of recaptured fish changed patches. Net distances moved ranged from 4 to 606 m, median distance moved was 49 m. Of fish recaptured repeatedly during the four sampling periods, most (65%) changed patches at least once, but few were consistently mobile. Inter‐patch distance was an important variable with a negative effect on creek chub movements. Inter‐patch cover was less important, but had a positive effect on movements. Frequent, short‐distance movements among habitat patches in summer are a component of the ecology of creek chubs and the spatial arrangement of patches, and intervening stream conditions appear to mediate those movements.