Target Fish Communities

Final Target Fish Community Reports
For more information about the Instream Flow Program please visit the ISF webpage.

NHDES hosted an information meeting Monday, August 27, 2018 from 3:30 to 5:00 pm describing the conclusions of the Target Fish Communities assessments of designated rivers in New Hampshire. The meeting was held at the NHDES offices at 29 Hazen Drive, Concord, NH and was open to the public. The presentation is available at NHDES TFC Presentation – August 27, 2018 Meeting

The TFCs are the fish species population distributions that should be found in a designated river. The TFCs are used to identify the habitat needs, including flow, of the fish species in the river and to evaluate whether the existing population is adjusting toward or away from the target community after instream flow management is applied.

Below are Target Fish Community (TFC) assessment reports for each designated river. The reports describe the three steps required to define TFCs for each river: (1) division of the designated rivers into segments having distinct fish communities and (2) identification of reference rivers with similar characteristics for each segment and (3) calculation of the TFC comprised of, for each river segment, the percent of each fish species in the community.

Note: The Instream Flow Program did not include development of TFCs for the tidally-influenced portions of the Lamprey and Squamscott rivers at this time, as a procedure for developing protected instream flows still needs to be determined for tidal rivers. In addition, the Program did not include the Connecticut and Lower Merrimack rivers in this TFC assessment due to their large size, their downstream positions within their watersheds, and the difficulty of determining the TFC where no unimpacted reference rivers exist.

NHDES hosted an information meeting on Wednesday, February 21, 2018 from 6:00 to 7:30 pm describing the development of Target Fish Communities on designated rivers in New Hampshire. A copy of the presentation can be found here: ISF Target Fish Community Presentation 2.21.2018