Reproduction. Slimy sculpin reproduction.—T o determine. Google Scholar. Slimy Sculpin (Cottus cognatus) General Information Sculpins prefer high gradient waters with rock, gravel substrate, which limits their distribution to the northern waters of the state. Karlstrom O. streams, we released equal numbers of fish into. Mottled brown with dark blotches over entire body and fins. The slimy sculpin has been studied in waters where there is current acidification (water that is more acidic). Incomplete lateral line ends under soft dorsal fin. They are intolerant of impaired water qualities. Identification. Crossref. Waters (1975) reported that no trout eggs or fry were ever found in stomachs of the slimy sculpin, Cottus cognatus, in \Ialley Creek, t~innesota. Margin of first dorsal fin normally clear, but turns bright red in spawning males. Slimy Sculpin (Cottus cognatus) - Native. Fish were pooled across years as it was difficult to ob tain all sizes of gravid females, especially the very small and large individuals every year. Inhabits rocky riffles of cold streams, rocky areas of lakes (commonly at 90-106 m depth), springs and their effluents (Ref. 5723).Moves into shallow water to spawn (Ref. Results from this study indicate the slimy sculpin is a suitable fish species for monitoring rivers that receive multiple industrial and municipal effluents. 27547).In some areas, they are common in brackish water (Ref. The influence of acidic runoff episodes on slimy sculpin reproduction in Stone Run. A 3-inch adult slimy sculpin. This project will use genetic testing to explore the survival and reproduction rates of slimy sculpin (Cottus cognatus, a small, bottom-dwelling forage fish) translocated into several southern Minnesota streams. 1976. Zoon, 4: 53–63. Google Scholar. From the evi de nee then, 1-1e know that scul pins prey on trout and sa 1mon fry in the wild environment. The sculpin were found to be less active and have lower rates of reproduction when found in these waters. In North America, it occurs from Transactions of the American Fisheries Society, 130: 1106–1115. The responses of slimy sculpin and white sucker differed, perhaps in relation to differences in life history characteristics. the two study reaches in 1998, 56 per stream on. Quantitative methods in electrical fishings in Swedish salmon rivers. Slimy Sculpin Reproduction 385 Fecundity was determined for slimy sculpins col lected near Olcott and Nine Mile Point, New York during April to May in 1989, 1991, and 1993. Native Range Northern North America to extreme northeastern Siberia. whether slimy sculpin would spawn in the study. 27843), presumably moving to and from fresh water, at least for spawning (Ref. Three pelvic fin rays. 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