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Spatial and Temporal Dynamics in Brook Trout Density: Implications for Population Monitoring
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T.Wagner et al., Abstract
Many potential stressors to aquatic environments operate over large spatial scales, prompting the need to assess and
monitor both site-specific and regional dynamics of fish populations. We used hierarchical Bayesian models to evaluate
the spatial and temporal variability in density and capture probability of age-1 and older Brook Trout Salvelinus
fontinalis from three-pass removal data collected at 291 sites over a 37-year time period (1975–2011) in Pennsylvania
streams. There was high between-year variability in density, with annual posterior means ranging from 2.1 to 10.2
fish/100 m2
; however, there was no significant long-term linear trend. Brook Trout density was positively correlated
with elevation and negatively correlated with percent developed land use in the network catchment. Probability
of capture did not vary substantially across sites or years but was negatively correlated with mean stream width.
Because of the low spatiotemporal variation in capture probability and a strong correlation between first-pass CPUE
(catch/min) and three-pass removal density estimates, the use of an abundance index based on first-pass CPUE could
represent a cost-effective alternative to conducting multiple-pass removal sampling for some Brook Trout monitoring
and assessment objectives. Single-pass indices may be particularly relevant for monitoring objectives that do not
require precise site-specific estimates, such as regional monitoring programs that are designed to detect long-term
linear trends in density.
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Brook Trout and Stream Temperature Workshop Information
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Resource Materials: Reprints
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Standard Structure
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Developed using all Portfolio Themes -- to create a common Structure to present the Portfolio
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Our Plan
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2012 Science Needs Portfolio
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State Agencies
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Our Plan
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Section 3. Management Capacity Within the Appalachian Community
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State Agencies and Climate Change Planning
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State Wildlife Action Plans prepared by natural resource agencies describe monitoring species and their habitats, monitoring the effectiveness of the conservation actions proposed, and adapting these conservation actions to respond appropriately to new information or changing conditions, including climate change. Other agencies at the state and federal level have also identified a need to plan strategically for climate change. The following states had published climate change plans or reports at the time of publication of the Appalachian Development and Operations Plan.
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Section 1: Biodiversity and Conservation Challenges Across the Appalachian Region
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State Stream Temperature Compilation
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Resource Materials: Previous Workshops
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2012 Stream Temperature Data and Modeling (Meeting I)
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State Stream Temperature Compilation
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PPT slides provided by Jana Stewart. "Water Temperature Monitoring Efforts by Individual Agencies"
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Stream Temperature Workshop Information
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Resource Materials: Presentations
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State Wildlife Action Plans (SWAPs)
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An Agenda for Conservation Success in Every State: In order to receive funds through the Wildlife Conservation and Restoration Program and the State Wildlife Grants Program, Congress charged each state and territory with developing a wildlife action plan. These proactive plans, known technically as “comprehensive wildlife conservation strategies,” assess the health of each state’s wildlife and habitats, identify the problems they face, and outline the actions that are needed to conserve them over the long term.
All 50 States and five U.S. territories developed a State Wildlife Action Plan (SWAP) in 2005. State Wildlife Action Plans outline the steps that are needed to conserve wildlife and habitat before they become too rare or costly to restore. Taken as a whole, they present a national action agenda for preventing wildlife from becoming endangered.
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SC Programmatic Alignment Work Group
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State Wildlife Action Plans (SWAPs)
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States
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Our Plan
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Stream Classification System for the Appalachians
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funded research: TNC-Boston/NE
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Workshops
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Stream Impacts from Water Withdrawals in the Marcellus Shale Region
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funded research: Cornell University
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Workshops
