Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): Bonnie. J.E. Myers; C. Andrew Dolloff; Andrew L. Rypel
    Date: 2014
    Source: Wild Trout XI Symposium 127-135
    Publication Series: Scientific Journal (JRNL)
    Station: Southern Research Station
    PDF: Download Publication  (672.28 KB)


    Many Appalachian streams historically dominated by Brook Trout Salvelinus fontinalis have experienced shifts towards fish communities dominated by Rainbow Trout Onchorhynchus mykiss. We used empirical estimates of biomass and secondary production of trout conspecifics to evaluate species success under varied thermal regimes. Trout populations were sampled in 13 Appalachian streams from Maryland to North Carolina during summer 2012, and biomass and production of trout species were examined in relation to habitat and water temperature data. Rainbow Trout and Brook Trout were found co-occurring at three sites, Rainbow Trout populations were encountered at an additional five sites, and Brook Trout populations were also encountered at an additional five sites. Brook Trout co-occurred at one site with Brown Trout Salmo trutta. Biomass estimates for Brook Trout and Rainbow Trout ranged from 0.01 to 1.15 g·m-2 and 0.35 to 1.60 g·m-2, respectively. Secondary production estimates for Brook Trout and Rainbow Trout ranged from 0.12 to 1.09 g·m-2·yr-1, and from 0.06 to 7.48 g·m-2·yr-1, respectively; thus, Rainbow Trout tended to dominate production in study streams where both species co-occurred. Brown Trout was 1.14 g·m-2 and production was 1.20 g·m-2·yr-1; thus, it also dominated biomass and production compared to Brook Trout. Logistic regressions revealed percent production of Rainbow Trout had a positive relationship with mean minimum winter air temperature (P<0.05) and, conversely, percent production of Brook Trout had a negative relationship with mean minimum winter temperature (P<0.05). Thus, temperature coupled with interspecific competition could be influencing Brook Trout production in these mixed trout streams. Our results suggest that with increasing winter temperatures Brook Trout production could decrease, further highlighting the need to mitigate the effects of climate change on Brook Trout in their native range.

    Publication Notes

    • You may send email to to request a hard copy of this publication.
    • (Please specify exactly which publication you are requesting and your mailing address.)
    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.


    Myers, Bonnie. J.E.; Dolloff, C. Andrew; Rypel, Andrew L. 2014. Rainbow trout versus brook trout biomass and production under varied climate regimes in small southern Appalachian streams. IN: Carline, R.F., and C. LoSapio, editors. Proceedings: Looking back and moving forward. Bozeman, MT. Wild Trout XI Symposium: 127-135 9p.

    Related Search

    XML: View XML
Show More
Show Fewer
Jump to Top of Page