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February 2013 NFH Board Meeting Book
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This document contains materials associated with the National Fish Habitat Board's February 26 - 27, 2013 in-person meeting.
Located in
About EBTJV
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National Fish Habitat Board Meetings
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2013 NFH Board Meetings
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Fisheries - Responding to Drought and Water Challenges
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A presentation of coldwater fisheries and climate adaptation case studies in the Eastern and Western United States.
Located in
The Story of Wild Brook Trout
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Brook Trout Video and Webinar Gallery
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Fragmentation and Patch Size Shape Genetic Structure of Brook Trout Populations
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We tested the relative influence of habitat patch size and connectivity on genetic structure and effective population size in eight brook trout (Salvelinus fontinalis) habitat patches in a watershed in Virginia, USA. Variation at eight microsatellite loci in 2229 young-of-the-year brook trout for two successive cohorts (2010 and 2011) was examined. Genetic differentiation across all populations was pronounced. Overall F'ST was 0.397 (95% CI: 0.322–0.525) and overall FST was 0.124 (95% CI: 0.096–0.159). Above-barrier patch size had a strong positive relationship with genetic diversity, Nˆ b, and genetic differentiation. Our analysis is consistent with greater extinction risk in smaller above-barrier patches. Larger above-barrier patches contained greater genetic diversity but reduced Nˆ b relative to adjacent below-barrier patches. The primary effect of barriers may be to reduce available above-barrier spawning habitat, even for larger above-barrier patches. Below-barrier patches also showed evidence of reduced genetic diversity and lack of connectivity. Genetic monitoring focused at gaining a broader understanding of the relationships here will be necessary to fully evaluate local extinction risks.
Located in
Science and Data
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Brook Trout Related Publications
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Brook Trout Genetics Research
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Fragmentation and Patch Size Shape Genetic Structure of Brook Trout Populations
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We tested the relative influence of habitat patch size and connectivity on genetic structure and effective population size in eight brook trout (Salvelinus fontinalis) habitat patches in a watershed in Virginia, USA. Variation at eight microsatellite loci in 2229 young-of-the-year brook trout for two successive cohorts (2010 and 2011) was examined. Genetic differentiation across all populations was pronounced. Overall F'ST was 0.397 (95% CI: 0.322–0.525) and overall FST was 0.124 (95% CI: 0.096–0.159). Above-barrier patch size had a strong positive relationship with genetic diversity, Nˆ b, and genetic differentiation. Our analysis is consistent with greater extinction risk in smaller above-barrier patches. Larger above-barrier patches contained greater genetic diversity but reduced Nˆ b relative to adjacent below-barrier patches. The primary effect of barriers may be to reduce available above-barrier spawning habitat, even for larger above-barrier patches. Below-barrier patches also showed evidence of reduced genetic diversity and lack of connectivity. Genetic monitoring focused at gaining a broader understanding of the relationships here will be necessary to fully evaluate local extinction risks.
Located in
Science and Data
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Brook Trout Related Publications
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FY14 EBTJV Coordination and Operations_FWS-NFHAP Funded Agreement
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This folder contains documents related to the EBTJV's FY14 Coordination and Operations agreement supported by FWS-NFHAP Funds.
Located in
Projects
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EBTJV Operational Grants
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FY15 EBTJV Coordination and Operations_FWS-NFHAP Funded Agreement
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This folder contains documents related to the EBTJV's FY15 Coordination and Operations agreement supported by FWS-NFHAP Funds.
Located in
Projects
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EBTJV Operational Grants
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FY15 Scope of Work
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This document describes the EBTJV Coordinator's scope of work supported by FY15 FWS-NFHAP funds.
Located in
About EBTJV
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EBTJV Management
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EBTJV Coordinator - Scope of Work Descriptions
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FY16 EBTJV Coordination and Operations_FWS-NFHAP Funded Agreement
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This folder contains documents related to the EBTJV's FY16 Coordination and Operations agreement supported by FWS-NFHAP Funds.
Located in
Projects
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EBTJV Operational Grants
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FY16 Scope of Work
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This document describes the EBTJV Coordinator's scope of worked supported by FY16 FWS-NFHAP funding.
Located in
About EBTJV
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EBTJV Management
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EBTJV Coordinator - Scope of Work Descriptions
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FY17 EBTJV Coordination and Operations_FWS-NFHAP Funded Agreement
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This folder contains documents related to the EBTJV's FY17 Coordination and Operations agreement supported by FWS-NFHAP Funds.
Located in
Projects
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EBTJV Operational Grants