Perry, Stephen

EBTJV Range-wide Habitat Goals, Objectives, and Key Conservation Actions: This folder contains documents that describe the EBTJV's current range-wide habitat goals and objectives, as well as its key conservation actions.
Located in Projects / EBTJV Funding Opportunities / 2027 Funding Application Information
EBTJV Salmonid Catchment Assessment and Habitat Patch Layers: Extending, standardizing, and automating the salmonid status assessment is a fundamental goal of the EBTJV. This pdf is a combination of the description of the original (2016) catchment assessment methods and the description of the 2023/2024 update process.
Located in Science and Data / EBTJV Reports
EBTJV September 28-30, 2015 Meeting Agenda: This documents contains the meeting agenda items.
Located in About EBTJV / … / EBTJV Partnership Meetings / EBTJV Meeting September 28-30, 2015
EBTJV Steering Committee Meeting, September 29, 2015: This documents contains the agenda items discussed during the EBTJV's Steering Committee Meeting held September 29, 2015.
Located in About EBTJV / … / EBTJV Partnership Meetings / EBTJV Meeting September 28-30, 2015
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 Science and Data / Brook Trout Related Publications
Enhancing and Connecting Wild Brook Trout Populations in VT’s West Mountain Wildlife Management Area: This project will replace one stream crossing and remove another that currently prevents the movement of fish and other aquatic organisms in the West Mountain Pond watershed. The new structures will open 2.5 stream miles and permit fish and other aquatic organisms to move in search of cold water refugia, food, and spawning habitat. In addition, woody habitat will be restored to 1.25 stream. Total project cost is $143,000.
Located in Projects / 2006 - 2018 Projects / 2017 Projects
Enhancing and connecting wild brook trout populations in VT’s West Mountain Wildlife Management Area: Project application
Located in Projects / … / 2017 Projects / Enhancing and Connecting Wild Brook Trout Populations in VT’s West Mountain Wildlife Management Area
Enhancing Connectivity in the Androscoggin River Watershed, ME_FY08 Project: This project improved fish passage and assessed fish passage barriers within the watershed.
Located in Projects / Project Completion Reports
Enhancing Connectivity in the West Branch Narraguagus River, ME_FY11 Project: This project replaced degraded road-stream crossings (culverts) with bankfull channel width spanning open bottom structures.
Located in Projects / Project Completion Reports
Environmental DNA Sampling Informs Fish Eradication Efforts: Case Studies and Lessons Learned: Worldwide, freshwater ecosystems are threatened by invasive species, resulting in adverse effects on infrastructure, economy, recreation, and native aquatic communities. In stream settings, chemical piscicides can be an effective tool for eradicating invasive fishes. However, chemical treatments are expensive and time consuming, and they do not discriminate between invasive and native species in a system. Therefore, managers would ideally limit treatment to only the area occupied by the invasive species. Because traditional survey methods may not accurately detect individuals in low abundance (e.g., at the edge of their distribution, or following an eradication effort), chemical treatments may be applied more broadly and more often than is necessary to ensure complete coverage. Furthermore, inadequate post-treatment sampling can fail to detect survivors of a treatment. As a result, managers may erroneously conclude that eradication was successful, leaving the ecosystem vulnerable to reestablishment by the invader. More sensitive sampling tools should allow for more precise definition of the treatment area and more accurate evaluation of project success. This would reduce project costs and overall effects on native species. Here, we illustrate how environmental DNA (eDNA) sampling addressed these challenges through three case studies, each of which used eDNA sampling to inform the removal of Brook Trout Salvelinus fontinalis in small streams. We found that eDNA methods can be informative throughout all stages of eradication projects in stream settings. It can assist with delimiting the population prior to treatment, provide detailed location data on surviving target individuals, and serve as an efficient and relatively inexpensive monitoring tool to assess long-term treatment efficacy. When combined with traditional survey tools, such as electrofishing, eDNA sampling may help reduce the size and number of treatments that are necessary to reach project goals. This translates directly to increased efficacy of treatments, reduced labor and cost, and reduced adverse effects on the native community.
Located in Science and Data / Brook Trout Related Publications

« Previous 10 items Next 10 items » 1 ... 17 18 19 [20] 21 22 23 ... 38

Sections

Personal tools

Search results