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File Efficacy of Environmental DNA to Detect and Quantify Brook Trout Populations in Headwater Streams of the Adirondack Mountains, New York
Environmental DNA (eDNA) analysis is rapidly evolving as a tool for monitoring the distributions of aquatic species. Detection of species’ populations in streams may be challenging because the persistence time for intact DNA fragments is unknown and because eDNA is diluted and dispersed by dynamic hydrological processes. During 2015, the DNA of Brook Trout Salvelinus fontinalis was analyzed from water samples collected at 40 streams across the Adirondack region of upstate New York, where Brook Trout populations were recently quantified. Study objectives were to evaluate different sampling methods and the ability of eDNA to accurately predict the presence and abundance of resident Brook Trout populations. Results from three-pass electrofishing surveys indicated that Brook Trout were absent from 10 sites and were present in low (<100 fish/0.1 ha), moderate (100–300 fish/0.1 ha), and high (>300 fish/0.1 ha) densities at 9, 11, and 10 sites, respectively. The eDNA results correctly predicted the presence and confirmed the absence of Brook Trout at 85.0–92.5% of the study sites; eDNA also explained 44% of the variability in Brook Trout population density and 24% of the variability in biomass. These findings indicate that eDNA surveys will enable researchers to effectively characterize the presence and abundance of Brook Trout and other species’ populations in headwater streams across the Adirondack region and elsewhere.
Located in Resources / Brook Trout Related Publications
Eastern Brook Trout Conservation Portfolio, Range-wide Assessment and Focal Area Tools
Trout Unlimited developed three conservation planning products to help identify strategic conservation opportunities and evaluate potential projects within the range of Eastern Brook Trout (EBT) in the eastern US.
Located in News & Events / Announcements
File September 20, 2017 EBTJV Steering Committee Teleconference Summary
This document summarizes the EBTJV Steering Committee discussion of agenda items during its 9/20/17 teleconference.
Located in Groups / / 2017 Steering Committee Conference Call Summaries / December 19, 2017 EBTJV Steering Committee Call
File Troff document December 19, 2017 EBTJV Steering Committee Teleconference Agenda - Draft
This draft document contains agenda items to be discussed during the EBTJV Steering Committee's 12/19/17 teleconference.
Located in Groups / / 2017 Steering Committee Conference Call Summaries / December 19, 2017 EBTJV Steering Committee Call
Our Fish, Our Future: National Fish Habitat Partnership Releases New Story Map
The National Fish Habitat Partnership story map provides background on the momentum surrounding the National Fish Habitat Partnership effort from its beginning in 2006.
Located in News & Events / News Items
File March 28, 2017 Steering Committee Conference Call Summary
This document summarizes SC discussions related to the March 28, 2017 conference call agenda items.
Located in Groups / / 2017 Steering Committee Conference Call Summaries / June 20, 2017 EBTJV SC Conference Call
File ECMAScript program EBTJV's Revised Range-wide Habitat Goals and Objectives
This document contains the EBTJV's revised range-wide habitat goals and objectives.
Located in Groups / / 2017 Steering Committee Conference Call Summaries / June 20, 2017 EBTJV SC Conference Call
File EBTJV's Revised Key Conservation Actions
This document contains the EBTJV's revised key conservation actions.
Located in Groups / / 2017 Steering Committee Conference Call Summaries / June 20, 2017 EBTJV SC Conference Call
File FY17 FWS-NFHAP Project Funding
This document details the FY17 FWS-NFHAP funding the EBTJV was allocated.
Located in Groups / / 2017 Steering Committee Conference Call Summaries / June 20, 2017 EBTJV SC Conference Call
File Octet Stream Revised Project Review Criteria
This document contains draft revisions to the EBTJV's project review criteria.
Located in Groups / / 2017 Steering Committee Conference Call Summaries / June 20, 2017 EBTJV SC Conference Call