Sculpin (Cottus) Distribution in the Kootenai National Forest And Western Portions of the Lolo National Forest Montana 1992
Sculpin (Cottus) Distribution in the Kootenai National Forest And Western Portions of the Lolo National Forest Montana 1992
Montana Natural Heritage Program
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Pool, riffle and run habitat were not sampled in proportion to the frequency of occurrence of each habitat type in the stream segment. Furthermore, the proportion of riffle, run and pool at a sample site was not quantified. As a result, concluding that all three sculpin species prefer run habitat could be a reflection of sampling methodology bias rather than a valid conclusion. Stream character preferences between species were not discernible based on qualitative measures of habitat. Future stu...dies might examine current velocities especially at a more sensitive scale to distinguish species specific preferences. Substrate Substrate composition appeared to be an important habitat parameter influencing the abundance of all three sculpin species at any one particular site. However, there were no identified distinctions between species. 36 Several explanations for the affinity of sculpins to rabble substrates exist. The interstitial spaces common in rabble substrates offer refuge from predatory fish and birds.
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