Skip to content. | Skip to navigation

Sections
Personal tools
You are here: Home / Practitioners (individuals) / Perry, Stephen

Search results

363 items matching your search terms.
Filter the results.
Item type


















New items since



Sort by relevance · date (newest first) · alphabetically
File Upper South Branch/Thorn Creek Brook Trout Patch Restoration and Monitoring, Cave, WV
Project application
Located in Projects / … / 2018 Projects / Upper South Branch/Thorn Creek Brook Trout Patch Restoration and Monitoring, Cave, WV
File chemical/x-pdb USFWS Copyright Release Agreement
Requirement for the EBTJV/FWS-NFHAP project funding application package.
Located in Projects / EBTJV Funding Opportunities / 2025 Project Application Information
File chemical/x-pdb USFWS Copyright Release Agreement
Requirement for the EBTJV/FWS-NFHAP project funding application package.
Located in Projects / EBTJV Funding Opportunities / 2024 Project Application Information
File chemical/x-pdb USFWS Copyright Release Agreement
Requirement for the EBTJV/FWS-NFHAP project funding application package.
Located in Projects / EBTJV Funding Opportunities / 2023 Project Application Information
File application/x-troff-ms What predicts the use by brook trout (Salvelinus fontinalis) of terrestrial invertebrate subsidies in headwater streams?
1. Spatial subsidies are important resources for organisms in receiving habitats, particularly when production in those habitats is low. Terrestrial invertebrates provide a critical subsidy for trout, including eastern brook trout (Salvelinus fontinalis), but we have limited understanding of what causes input and use of these subsidies to vary among streams. 2. We predicted that forest successional stage would be an especially important driver of variation in terrestrial invertebrate subsidies to brook trout in headwater streams due to differences in terrestrial invertebrate biomass in early and late successional habitats. Specifically, we expected biomass of aerial invertebrates, those capable of dispersal to the stream, to be greater in early successional habitat than late successional habitat due to the nutrient-rich, herbaceous vegetation typical of early successional habitat. 3. We measured aerial terrestrial invertebrate biomass in early and late successional habitats, input to streams and use by resident brook trout in 12 first- and second-order catchments in northern New Hampshire, U.S.A. The study catchments represented a range of early successional habitat coverage (0–51.5%). We also measured a suite of reach-scale variables that might influence terrestrial invertebrate input and use by brook trout, including riparian forest conditions and benthic invertebrate biomass. 4. Within study catchments, aerial terrestrial invertebrate biomass and abundance were significantly higher in early successional habitats than late successional habitats. However, terrestrial invertebrate input to streams and use by brook trout were unrelated to per cent early successional habitat in the catchment, and to other catchment and riparian forest characteristics. These results indicate that the management for upland early successional habitat has little effect on terrestrial invertebrate subsidies to headwater streams and fish. 5. Surprisingly, benthic invertebrate biomass was the one significant predictor of per cent terrestrial invertebrates in brook trout diets. Use of terrestrial invertebrate subsidies declined with increasing benthic invertebrate biomass, suggesting that productivity in the aquatic environment influences the degree to which brook trout use terrestrial subsidies. Although subsidy inputs are controlled by the donor system, this study shows that use of these subsidies by consumers can be determined by conditions in the recipient habitat.
Located in Science and Data / Brook Trout Related Publications
File 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
File Troff document Whitethorn Creek Habitat Restoration, WV_FY07 Project
Project partners teamed up with landowners in the Whitethorn Creek basin to install livestock exclusion fencing and related infrastructure, install Natural Stream Design features, plant trees, and control invasive species to restore more than one mile of stream habitat and 16 acres of riparian vegetation.
Located in Projects / Project Completion Reports
Image JPEG image Wild Brook Trout
Image of brook trout
Located in About EBTJV
Image JPEG image Wild Brook Trout Stream
Photo of trout stream
Located in The Story of Wild Brook Trout / Wild Brook Trout Image Gallery
File Troff document Williams Run Acid Mine Drainage Mitigation, PA_FY07 Project
This project mitigated the effects of acidic pH levels in Williams Run by using lime treatments and constructing a limestone bed system to passively treat acid mine drainage over the long term.
Located in Projects / Project Completion Reports
« Previous 10 items Next 3 items » 1 ... 33 34 35 [36] 37