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- W2094909755 abstract "1. We examined the effects of prey abundance on patch selection by a benthic fish, the mottled sculpin (Cottus bairdi), in a fourth order, southern Appalachian stream (North Carolina, U.S.A.). This habitat is a mosaic of small (i.e. < 0.5 m2), relatively discrete patches. 2. Patches were characterized in terms of physical habitat variables, detritus (coarse particulate organic matter, CPOM) and macroinvertebrate abundance (number and biomass). We quantified patch selection by comparing the characteristics of patches utilized by sculpin with those of locally available patches. Locally available patches were selected using a constrained random sampling design (i.e. randomly selected within a 2 m radius from each fish). We also examined the relationship between macroinvertebrate abundance, CPOM and the physical characteristics of available patches. 3. Patches selected by sculpin contained significantly higher macroinvertebrate abundances (both number and biomass) than locally available patches in five out of six seasonal samples. Sculpin also occupied patches with significantly higher amounts of CPOM in three out of five seasonal samples. Patches utilized by sculpin, however, could not be consistently differentiated from locally available patches on the basis of physical variables. In addition, macroinvertebrate abundance was not consistently related to physical habitat variables or CPOM during the course of the study. 4. Our results suggest that sculpin are able to assess patch quality on the basis of prey abundance and select patches that potentially maximize energy gain. This behaviour may produce an increase in individual fitness, especially when prey distributions are not consistently related to habitat variables. Quantifying patch use in relation to prey abundance may help elucidate the causal factors determining habitat use by benthic fishes in other lotic systems." @default.
- W2094909755 created "2016-06-24" @default.
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- W2094909755 date "1996-04-01" @default.
- W2094909755 modified "2023-10-11" @default.
- W2094909755 title "Patch selection by mottled sculpin (Pisces: Cottidae) in a southern Appalachian stream" @default.
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- W2094909755 doi "https://doi.org/10.1046/j.1365-2427.1996.00498.x" @default.
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