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New Hampshire Statewide Targeted Fish Community Assessment
Warner River, January 2023

Target Fish Community models have been developed for a number of instream flow related projects in the Northeast. The TFC development process, as defined by Bain and Meixler (2005), uses fish community data from the best available reference rivers that would characterize a feasible and currently relevant fish community. As such, the TFC model does not represent a historically “natural” community, but instead represents a community that would be expected to exist in the present time given relatively low direct anthropogenic impact on instream habitat. This approach has been useful for evaluating the biological integrity of streams and rivers by comparing the existing fish community with that of the predicted TFC. NHDES plans to use the TFC models in support of development of protected instream flows on Designated Rivers, and also as guidelines for evaluating the biological integrity.

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