Genetic evidence of local exploitation of Atlantic salmon in a coastal subsistence fishery in the Northwest Atlantic

Bradbury, Ian; Hamilton, Lorraine C.; Rafferty, S.; Meerburg, David; Poole, Rebecca L; Dempson, J. Brian; Robertson, Martha J.; Reddin, D. G.; Bourret, Vincent; Dionne, Mélanie; Chaput, Gérald; Sheehan, Timothy F.; King, Timothy L.; Candy, John R.; Bernatchez, Louis

doi:10.1139/cjfas-2014-0058

Cited by 37 publications

(63 citation statements)

References 45 publications

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“…These include the Labrador subsistence food fisheries, the fishery at West Greenland, and a fishery in the waters surrounding the French islands of St. Pierre and Miquelon (ICES, 2015). Previous genetic based mixture analysis of the Labrador and West Greenland harvests have revealed contrasting patterns in stock composition consistent with their location on migratory routes of salmon at sea; the Labrador salmon fisheries harvesting predominantly Labrador origin salmon (96%, Bradbury et al, 2015) and the west Greenland fishery harvesting a mixture of stocks from eastern North America as well as from Europe (Gauthier-Ouellet et al, 2009;Sheehan et al, 2010). However, the stock composition of the St. Pierre and Miquelon Atlantic salmon fishery has to date not been determined and remains of concern to management and conservation efforts.…”

Section: Introductionmentioning

confidence: 94%

“…1, Table 1). Data included in the baseline represented a combination of previously analyzed datasets (see Bradbury et al, 2014;Dionne et al, 2008 for regional analyses and further details) and new data (see Bradbury et al, 2015;Moore et al 2014 for methods and database details). The baseline differs from previous analyses in that two additional rivers were included to better represent US salmon populations.…”

Section: Baseline Samplesmentioning

confidence: 99%

“…1). Baseline accuracy for mixture analysis and individual assignment have been extensively explored previously (see Bradbury et al, 2015;Moore et al, 2014), but limited re-analysis has been conducted here to assess the impact of the inclusion of the two additional populations.…”

Section: Baseline Samplesmentioning

confidence: 99%

“…Microsatellite polymorphisms were scored at the following 15 loci: Ssa85, Ssa202, Ssa197 (O'Reilly et al, 1996), SSOSL417 (Slettan et al, 1995), SsaD85 (King, unpublished), SsaD58, SsaD71, SsaD144, SsaD486 (King et al, 2005), MST-3 (hereafter referred to as U3) (Presa and Guyomard, 1996), SSsp2201, SSsp2210, SSsp2215, SSsp2216 and SSspG7 (Paterson et al, 2004). Genotyping of fishery samples followed the methods outlined in Bradbury et al (2015) and Bradbury et al (2014). In short, loci were multiplexed into three panels either by combining loci amplified individually prior to electrophoresis, or by multiplexing at the PCR stage.…”

Section: Dna Extraction and Genotyping Fishery Samplesmentioning

confidence: 99%

“…However, as genetic baselines are established in more species, such as Atlantic salmon, Salmo salar (e.g., Bradbury et al, 2015;Ensing et al, 2013;Griffiths et al, 2010;Moore et al, 2014), new opportunities exist for broader application. Atlantic salmon, have traditionally been subject to mixed stock harvests during the marine phase of their life history, commonly associated with marine feeding areas or migratory routes (e.g., Chase, 2003;Saunders, 1981).…”

Section: Introductionmentioning

confidence: 99%

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Genetic mixed stock analysis of an interceptory Atlantic salmon fishery in the Northwest Atlantic

et al. 2016

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a b s t r a c tInterceptory fisheries represent an ongoing threat to migratory fish stocks particularly when managed in the absence of stock specific catch and exploitation information. Atlantic salmon from the southern portion of the North American range may be subject to exploitation in the commercial and recreational salmon fisheries occurring in the French territorial waters surrounding St. Pierre and Miquelon off southern Newfoundland. We evaluated stock composition of Atlantic salmon harvested in the St. Pierre and Miquelon Atlantic salmon fishery using genetic mixture analysis and individual assignment with a microsatellite baseline (15 loci, 12,409 individuals, 12 regional groups) encompassing the species western Atlantic range. Individual salmon were sampled from the St. Pierre and Miquelon fishery over four years (2004, 2011, 2013, and 2014). Biological characteristics indicate significant variation among years in the size and age distribution. Nonetheless, estimates of stock composition of the samples showed consistent dominance of three regions (i.e., Southern Gulf of St. Lawrence, Gaspe Peninsula, and Newfoundland). Together salmon from these regions accounted for more than 70% of annual harvest over the decade examined. Comparison of individual assignments and biological characteristics revealed a trend of declining fresh water age with latitude of assigned region. Moreover, locally harvested Newfoundland salmon were ten times more likely to be small or one sea winter individuals whereas Quebec and Gaspe Peninsula salmon were two-three times more likely to be harvested as large or two sea winter salmon. Estimates of region specific catch were highest for salmon from the southern Gulf of St. Lawrence region ranging from 242 to 887 individuals annually. This work illustrates how genetic analysis of interceptory marine fisheries can directly inform assessment and management efforts in highly migratory marine species.

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Section: Introductionmentioning

confidence: 94%

Section: Baseline Samplesmentioning

confidence: 99%

Section: Baseline Samplesmentioning

confidence: 99%

Section: Dna Extraction and Genotyping Fishery Samplesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Genetic mixed stock analysis of an interceptory Atlantic salmon fishery in the Northwest Atlantic

et al. 2016

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Determining natal origin for improved management of Atlantic bluefin tuna

Rodríguez-Ezpeleta

Díaz-Arce

Walter

et al. 2019

Frontiers in Ecol & Environ

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Effective sustainable management of marine fisheries requires that assessed management units (that is, fish stocks) correspond to biological populations. This issue has long been discussed in the context of Atlantic bluefin tuna (ABFT, Thunnus thynnus) management, which currently considers two unmixed stocks but does not take into account how individuals born in each of the two main spawning grounds (Gulf of Mexico and Mediterranean Sea) mix in feeding aggregations throughout the Atlantic Ocean. Using thousands of genome‐wide molecular markers obtained from larvae and young of the year collected at the species’ main spawning grounds, we provide what is, to the best of our knowledge, the first direct genetic evidence for “natal homing” in ABFT. This has facilitated the development of an accurate, cost‐effective, and non‐invasive tool for tracing the genetic origin of ABFT that allows for the assignment of catches to their population of origin, which is crucial for ensuring that ABFT management is based on biologically meaningful stock units rather than simply on catch location.

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A Review of River Herring Science in Support of Species Conservation and Ecosystem Restoration

et al. 2021

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River herring—a collective name for the Alewife Alosa pseudoharengus and Blueback Herring A. aestivalis—play a crucial role in freshwater and marine ecosystems along the Eastern Seaboard of North America. River herring are anadromous and return to freshwater habitats in the tens to hundreds of millions to spawn, supplying food to many species and providing nutrients to freshwater ecosystems. After two and a half centuries of habitat loss, habitat degradation, and overfishing, river herring are at historic lows. In 2013, National Oceanic and Atmospheric Administration Fisheries established the Technical Expert Working Group (TEWG) to synthesize information about river herring and to provide recommendations to advance the science related to their restoration. This paper was composed largely by the chairs of the TEWG subgroups and represents a review of the current state of knowledge of river herring, with an emphasis on identification of threats and discussion of recent research and management actions related to understanding and reducing these threats. Important research needs are then identified and discussed. Finally, current knowledge is synthesized, considering the relative importance of different threats. This synthesis identifies dam removal and increased stream connectivity as critical to river herring restoration. Better understanding and accounting for predation, climate change, and fisheries are also important for restoration. Finally, there is recent evidence that the effects of human development and contamination on habitat quality may be more important threats than previously recognized. Given the range of threats, an ecosystem approach is needed to be successful with river herring restoration. To facilitate this ecosystem approach, collaborative forums such as the TEWG (renamed the Atlantic Coast River Herring Collaborative Forum in 2020) are needed to share and synthesize information among river herring managers, researchers, and community groups from across the species’ range.

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Genetic evidence of local exploitation of Atlantic salmon in a coastal subsistence fishery in the Northwest Atlantic

Cited by 37 publications

References 45 publications

Genetic mixed stock analysis of an interceptory Atlantic salmon fishery in the Northwest Atlantic

Genetic mixed stock analysis of an interceptory Atlantic salmon fishery in the Northwest Atlantic

Determining natal origin for improved management of Atlantic bluefin tuna

A Review of River Herring Science in Support of Species Conservation and Ecosystem Restoration

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