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File application/x-maker June 2019 NFH Board Meeting Book
This document contains materials associated with the National Fish Habitat Board's June 19, 2019 meeting that was conducted by teleconference.
Located in About EBTJV / National Fish Habitat Board Meetings / 2019 NFH Board Meetings
File Linking movement and reproductive history of brook trout to assess habitat connectivity in a heterogeneous stream network
1. Defining functional connectivity between habitats in spatially heterogeneous landscapes is a particular challenge for small-bodied aquatic species. Traditional approaches (e.g. mark–recapture studies) preclude an assessment of animal movement over the life cycle (birth to reproduction), and movement of individuals may not represent the degree of gene movement for fecund species. 2. We investigated the degree of habitat connectivity (defined as the exchange of individuals and genes between mainstem and tributary habitats) in a stream brook trout (Salvelinus fontinalis) population using mark–recapture [passive integrated transponder (PIT) tags], stationary PIT-tag antennae and genetic pedigree data collected over 4 years (3425 marked individuals). We hypothesised that: (i) a combination of these data would reveal higher estimates of animal movement over the life cycle (within a generation), relative to more temporally confined approaches, and (ii) movement estimates of individuals within a generation would differ from between-generation movement of genes because of spatial variation in reproductive success associated with high fecundity of this species. 3. Over half of PIT-tagged fish (juveniles and adults) were recaptured within 20 m during periodic sampling, indicating restricted movement. However, continuous monitoring with stationary PIT-tag antennae revealed distinct peaks in trout movements in June and October–November, and sibship data inferred post-emergence movements of young-of-year trout that were too small to be tagged physically. A combination of these methods showed that a moderate portion of individuals (28–33%) moved between mainstem and tributary habitats over their life cycle. 4. Patterns of reproductive success varied spatially and temporally. The importance of tributaries as spawning habitat was discovered by accounting for reproductive history. When individuals born in the mainstem reproduced successfully, over 50% of their surviving offspring were inferred to have been born in tributaries. This high rate of gene movement to tributaries was cryptic, and it would have been missed by estimates based only on movement of individuals. 5. This study highlighted the importance of characterising animal movement over the life cycle for inferring habitat connectivity accurately. Such movements of individuals can contribute to substantial gene movements in a fecund species characterised by high variation in reproductive success.
Located in Science and Data / Brook Trout Related Publications
File Troff document Little Cards Brook Culvert Replacement, ME_FY16 Project
The project removed an aquatic passage barrier and restored access to an additional ¼ mile of cold water refugia.
Located in Projects / Project Completion Reports
File Troff document Lynn Camp Prong Brook Trout Restoration, TN_FY11 Project
This project was focused on removing rainbow trout from Lynn Camp Prong and re-stocking this stream with wild southern Appalachian strain Brook Trout,
Located in Projects / Project Completion Reports
File Troff document Lynn Camp Prong Restoration, TN_FY07 Project
This project eliminated non-native Rainbow Trout from Lynn Camp Prong in the Great Smoky Mountains State Park through the use of chemical means. Approximately 8 miles of stream were treated in an effort to restore a viable Brook Trout population.
Located in Projects / Project Completion Reports
File ECMAScript program Map of New Jersey Wild Brook Trout Patches
The map provides a visual depiction of the distribution of New Jersey's wild Brook Trout patches.
Located in Science and Data / … / EBTJV State Maps and Resources / State Maps of Wild Brook Trout Patch Distribution
File ECMAScript program Map of New York Wild Brook Trout Patches
The map provides a visual depiction of the distribution of New York's wild Brook Trout patches.
Located in Science and Data / … / EBTJV State Maps and Resources / State Maps of Wild Brook Trout Patch Distribution
File ECMAScript program Map of Pennsylvania Wild Brook Trout Patches
The map provides a visual depiction of the distribution of Pennsylvania's wild Brook Trout patches.
Located in Science and Data / … / EBTJV State Maps and Resources / State Maps of Wild Brook Trout Patch Distribution
File ECMAScript program Map of Rhode Island Wild Brook Trout Patches
The map provides a visual depiction of the distribution of Rhode Island's wild Brook Trout patches.
Located in Science and Data / … / EBTJV State Maps and Resources / State Maps of Wild Brook Trout Patch Distribution
File ECMAScript program Map of Vermont Wild Brook Trout Patches
The map provides a visual depiction of the distribution of Vermont's wild Brook Trout patches.
Located in Science and Data / … / EBTJV State Maps and Resources / State Maps of Wild Brook Trout Patch Distribution
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