EBTJV

October 2010 NFH Board Meeting Book: This document contains materials associated with the National Fish Habitat Board's October 12-14, 2010 in-person meeting.
Located in About EBTJV / National Fish Habitat Board Meetings / 2010 NFH Board Meetings
March 2010 NFH Board Meeting Book: This document contains materials associated with the National Fish Habitat Board's March 3 - 4, 2010 in-person meeting.
Located in About EBTJV / National Fish Habitat Board Meetings / 2010 NFH Board Meetings
June 2010 NFH Board Meeting Book: This document contains materials associated with the National Fish Habitat Board's June 9-10, 2010 in-person meeting.
Located in About EBTJV / National Fish Habitat Board Meetings / 2010 NFH Board Meetings
Sensitivity and Vulnerability of Brook Trout Populations to Climate Change: Predicting future brook trout Salvelinus fontinalis distributions at the population scale under various climate scenarios is of interest to the Eastern Brook Trout Joint Venture. Previous larger scale models have been useful in highlighting the potential threat; however, the predicted air and water temperature errors associated with these models makes predictions of the persistence of individual brook trout populations problematic. We directly measured paired air and water temperatures in watersheds (N = 77) containing reproducing populations of brook trout in Virginia. We found that paired air and water temperature relationships are highly variable among patches but are a useful dataset to classify sensitivity and vulnerability of existing brook trout patches. We developed a classification system using sensitivity and vulnerability metrics that classified sampled brook trout habitats into four categories (High Sensitivity- High Vulnerability (51.9% ); High Sensitivity-Low Vulnerability (10.4 % ); Low Sensitivity-High Vulnerability (7.8 % ); Low Sensitivity-Low Vulnerability (29.9 % ). Our direct measurement approach identified potential refugia for brook trout at lower elevations and with higher air temperatures than previous larger scale modeling efforts. Our sensitivity and vulnerability groupings should be useful for managers making investment decisions in protecting and restoring brook trout.
Located in Science and Data / Brook Trout Related Publications
Dynamics and regulation of the southern brook trout (Salvelinus fontinalis) population in an Appalachian stream: 1. We used information theoretic statistics [Akaike’s Information Criterion (AIC)] and regression analysis in a multiple hypothesis testing approach to assess the processes capable of explaining long-term demographic variation in a lightly exploited brook trout population in Ball Creek, NC. We sampled a 100-m-long second-order site during both spring and autumn 1991–2004, using three-pass electrofishing. 2. Principle component analysis indicated that the site had lower average velocity, greater amounts of depositional substrata and lower amount of erosional substrata during the 1999–2002 drought than in non-drought years. In addition, drought years had lower flows, and lower variation in flows, than non-drought years. 3. Both young-of-the-year (YOY) and adult densities varied by an order of magnitude during the study. AIC analysis conducted on regressions of per capita rate of increase versus various population and habitat parameters for the population, adults and YOY, for both spring and autumn data sets, indicated that simple density dependence almost always was the only interpretable model with Akaike weights (wi) ranging from 0.262 to 0.836. 4. Growth analyses yielded more variable results, with simple density dependence being the only interpretable model for both adult spring data (wi = 0.999) and YOY autumn data (wi = 0.905), and positive density dependence (wi = 0.636) and simple density independence (wi = 0.241) representing interpretable models for spring YOY data. 5. We detected a significant stock–recruitment relationship between both spring and autumn densities of adults in year t and autumn YOY density in year t + 1. Finally, spring YOY density was positively correlated with both autumn YOY density and spring mean YOY standard length (SL), suggesting that processes affecting recruitment show residual effects at least in the first year of life. This population appears to be regulated primarily by density dependent processes, although high flows also negatively affected mean SLs of YOY.
Located in Science and Data / Brook Trout Related Publications
When are Genetic Methods Useful for Estimating Contemporary Abundance and Detecting Population Trends - Tallmon et al. 2010: This study assessed the ability of a linkage disequilibrium estimator of effective population size and a simple capture-recapture estimator of abundance to quantify the size and trend of stable or declining populations, using simulated Wright-Fisher populations.
Located in Science and Data / Brook Trout Related Publications / Chesapeake Bay Brook Trout Management Strategy-References
Copper Creek In-Stream Habitat Restoration Project: This project improved riparian zones, water quality, appropriate sediment flows and restoring physical habitat for multiple listed aquatic species in the Copper Creek watershed, within the Upper Tennessee River Basin. (Photo: The low water bridge that was removed and replaced with a new bridge that spans the river.)
Located in Funded Projects / SARP Projects W2B
Using positive interactions between bivalves and seagrass to reduce habitat fragmentation and restore essential fish habitat: Lead by the University of North Carolina at Chapel Hill, this project will restore eelgrass cover that had declined by propeller scaring through introducing mussels. A natural fertilization and predator protection interaction study will also take place.
Located in Funded Projects / SARP Projects W2B
Crabtree Swamp Habitat Restoration: The restoration of Crabtree Swamp is an innovative, "first of its kind" project, in which a previously channelized drainage basin is being returned to a blackwater hardwood swamp in which the floodplain is being recreated via earthmoving and replanting into functional habitat for fish, invertebrates and other wildlife. To match resources, the restoration project has been subdivided into 10 reaches.
Located in Funded Projects / SARP Projects W2B
Harpeth River Restoration: As part of a jointly funded project via the National Fish Passage Program, the totality of this project is removing a lowhead dam and restoring the immediate area to riffle/run habitat for the benefit of improved water quality and native fish habitat in the Harpeth River, TN.
Located in Funded Projects / SARP Projects W2B

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