Browsing by Author "Samways, Kurt"
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Item Assessing Atlantic salmon (Salmo salar) recovery across five Atlantic Canadian National Parks through juvenile abundance modelling(University of New Brunswick, 2024-12) Robinson, John; Samways, KurtFor decades, Atlantic salmon in Eastern North America have precipitously declined. In response, Fundy National Park (FNP) and Cape Breton Highlands National Park (CBHNP) implemented smolt-to-adult supplementation strategies within marine and freshwater rearing environments, respectively, Kouchibouguac National Park (KNP) planted fertilized eggs, and Gros Morne (GMNP) and Terra Nova National Park (TNNP) used community-based restoration approaches. To assess juvenile salmon population abundance through decline and restoration implementation of these parks, a Bayesian hierarchical model was developed to standardize single-pass and multi-pass electrofishing methodology, and estimate an index of juvenile density, at site and annual scale, using an electrofishing dataset covering 536 sites, over 49 years, across 24 rivers. Single-pass sites lack the accuracy of multi-pass methods but are an efficient sampling approach from a full catchment perspective. Increasing population trends were shown in some rivers (FNP, KNP), while others exhibited continued declines (CBHNP, KNP, GMNP) or modelling challenges (CBHNP, TNNP).Item Genetic and phenotypic variation of Atlantic salmon (Salmo salar) young-of-the-year in the Upper Salmon River, NB, Canada(University of New Brunswick, 2022-04) Diesbourg, Emilie; Samways, Kurt; D’Aloia, CassidyDetermining the spatial scale at which genetic structuring occurs is one of the main goals of conservation genetics because such data can help identify management units. This study assessed the hierarchical genetic structure of Atlantic salmon young-of-the-year in the Upper Salmon River, NB at a fine spatial scale (~6 km). Using seven microsatellite loci, genetic clustering analyses and FST estimates were computed to determine the strength of genetic structure within the river. Patterns of genetic structure were then tested to detect whether they aligned with previously identified morphological groupings, using the same individuals. Subtle genetic differentiation (mean pairwise FST=0.036) and a weak isolation by distance pattern was found to exist within this ~6 km stretch of river. Additionally, not all morphological groupings were genetically distinct. This study highlights the importance of considering within-river genetic structure across small spatial scales for more informed conservation design.Item Mactaquac Aquatic Ecosystem Study Report Series 2018-024, Fish Passage at Tobique-Narrows, Beechwood, and Mactaquac Hydropower Generating Facilities in the Saint John River System, New Brunswick.(2018) Chateauvert, Adam; Linnansaari, Tommi; Samways, Kurt; Curry, R. AllenItem Mactaquac Aquatic Ecosystem Study Report Series 2018-033, PRELIMINARY FISH HABITAT AND COMMUNITY ASSESSMENT RELATED TO THE FUTURE OPTIONS OF THE MACTAQUAC GENERATING STATION(2018) Wegscheider, Bernhard; Linnansaari, Tommi; Ndong, Mouhamed; Ogilvie, Jae; Schneider, Matthias; Kopecki, Ianina; Dolson-Edge, Rebecca; Samways, Kurt; Haralampides, Katy; Curry, R. AllenItem Mactaquac Aquatic Ecosystem Study Report Series 2018-051, OPTIONS FOR FISH PASSAGE IN THE MACTAQUAC PROJECT: LIFE ACHIEVEMENT, SHORT-TERM CONSTRUCTION AND LONGER TERM, FINAL SOLUTIONS(2018) Curry, R. Allen; Yamazaki, Gordon; Samways, Kurt; Linnansaari, Tommi; Peake, StephenItem Mactaquac Aquatic Ecosystem Study Report Series 2018-065, ASSESSMENT OF POTENTIAL FOR UPSTREAM PASSAGE FOR JUVENILE EEL (ANGUILLA ROSTRATA) AT THE MACTAQUAC GENERATING STATION(2018) Dixon, Brittany; Linnansaari, Tommi; Dolson-Edge, Rebecca; Samways, KurtItem Mactaquac Aquatic Ecosystem Study Report Series 2019-050, STATE OF FISH PASSAGE DESIGN FOR THE MACTAQUAC GENERATING STATION(2019) Samways, Kurt; Dolson-Edge, Rebecca; Yamazaki, Gordon; Linnansaari, Tommi; Curry, R. AllenItem Mactaquac Aquatic Ecosystem Study Report Series 2019-061, Passage Efficiency of the Tobique-Narrows Smolt By-Pass Facility: 2017-8 Results(2019) Samways, Kurt; Gautreau, Mark; Curry, R. AllenItem Mactaquac Aquatic Ecosystem Study Report Series 2019-066, BASELINE BIOLOGICAL CONDITIONS IN THE SAINT JOHN RIVER(2019) Dolson-Edge, Rebecca; Bruce, Meghann; Samways, Kurt; Gautreau, Mark; Curry, R. Allen