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Fish species composition two second-order headwater streams the North Central Appalachians ecoregion

January 1, 2001

Fish species composition was determined for two second-order headwater streams within the North Central Appalachians ecoregion in northern Pennsylvania. The two streams were widely spaced geographically (over 193 km apart) and occurred in different drainage systems. Streams were sampled in the spring and fall over two years (1996–98) yielding similar fish assemblages. A total of five species was collected. Mottled sculpin (Cottus bairdli), slimy sculpin (Cottus cognatus), brook trout (Salvetinus fontinalis), and brown trout (Salmo trutta) were the dominant adult fishes. Two creek chubs (Semotilus atromaculatus) were also collected. No significant differences were found in sculpin weight, sculpin length, salmonid length, or brook trout length between streams. Paired t-tests detected eight significant seasonal differences within sites. Brook trout and mottled sculpin lengths were significantly greater in fall versus spring, while the reverse was found with slimy sculpins. Catches per unit effort were similar between the two streams, yielding 8.46 and 8.07 fish per minute of electrofishing. Both streams were very similar in faunal assemblages attributed to small, coldwater, high quality headwater streams in other regions.

Publication Year 2001
Title Fish species composition two second-order headwater streams the North Central Appalachians ecoregion
DOI 10.1080/02705060.2001.9663785
Authors M. N. DiLauro, R. M. Bennett
Publication Type Article
Publication Subtype Journal Article
Series Title Journal of Freshwater Ecology
Index ID 1015010
Record Source USGS Publications Warehouse