Limited population structure in Northern and Spotted Wolffishes (Anarhichas denticulatus and A. minor) despite low apparent dispersal potential

McCusker, Megan R.; Bentzen, Paul

doi:10.1007/s00227-011-1698-3

Cited by 7 publications

(6 citation statements)

References 49 publications

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“…Geographical population differences across the North Atlantic exist as determined by allozyme polymorphism and variation in mitochondrial DNA among spotted wolffish samples obtained from multiple locations (Imsland et al, 2008). Within Canadian waters, spotted wolffish have low genetic diversity, especially for a marine species, suggesting they may be more vulnerable to overexploitation than other wolffishes (McCusker & Bentzen, 2011).…”

Section: Species Distribution and Fishery Statusmentioning

confidence: 99%

The status of spotted wolffish, Anarhichas minor: A commercially ready species for U.S. marine aquaculture?

François

Fairchild

Nardi

et al. 2021

J World Aquaculture Soc

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The requirements to rear spotted wolffish, Anarhichas minor, a cold water, demersal fish, native to the north Atlantic Ocean, have been developed over the past 25 years (since 1990s) and it now is commercially produced in one fish farm in Norway with additional plans for commercial development in the near future in Quebec, Canada. Spotted wolffish have numerous attributes that make them a desirable species to culture in the United States including, but not limited to: having a high value; desired by consumers and chefs; not supplied by U.S. or Canadian fisheries; an established broodstock available in neighboring Quebec; well-developed hatchlings that do not require live feed; high rearing density tolerance; and low disease susceptibility.Here, we review the advancements made in broodstock management and spawning, egg incubation, juvenile rearing, and on-growing of fish, as well as future research and development needs. Areas requiring further focus include reducing variability in gamete production; nutritional studies at all life stages; health expertise; genetic selection; and further refinement of standard operating procedures at the commercial level for all life-stages. Given the state of advancement of wolffish cultivation and the existence of a

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Section: Species Distribution and Fishery Statusmentioning

confidence: 99%

The status of spotted wolffish, Anarhichas minor: A commercially ready species for U.S. marine aquaculture?

François

Fairchild

Nardi

et al. 2021

J World Aquaculture Soc

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“…In Canada, each species is considered to be made up of a single stock. Spotted wolffish, and to a lesser extent northern wolffish, exhibited low genetic diversity in the North Atlantic, with no regional pattern among samples from the eastern Atlantic (McCusker and Bentzen, ). Although a lower genetic diversity was observed among striped wolffish samples from the eastern Atlantic, compared with other areas in the North Atlantic, regional genetic groups appeared to be significant (McCusker and Bentzen, ).…”

Section: Discussionmentioning

confidence: 99%

Distribution and environmental relationships of three species of wolffish (Anarhichas spp.) in the Gulf of St. Lawrence

Dutil

Proulx

Chouinard

et al. 2013

Aquatic Conservation

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This study examines the spatial distribution of three species of wolffish in the Gulf of St. Lawrence on the basis of trawl surveys.A standardized method is proposed to assess species–habitat associations for the purpose of management and recovery of endangered marine species.Catch data (presence/absence in trawl sets) and landscape and environmental characteristics of the sea floor were aggregated using a common grid (100 km2 cells), and species–habitat relationships were explored using geospatial tools.Relative occurrence was lower and area of occupancy and concentration were much smaller for the northern wolffish (Anarhichas denticulatus) than for the spotted wolffish (Anarhichas minor), with the striped wolffish (Anarhichas lupus) being most widespread. Significant relationships were observed between values of the local spatial autocorrelation Gi* statistic and habitat descriptors for each of the three species.Hot spots for spotted and striped wolffish occurred in areas where a greater diversity of relief and habitats was found. They were associated with intermediate depths, coarse sediments and rock outcrops, and lower salinities and temperatures than for northern wolffish.Northern wolffish appeared to be associated mainly with the deep water sloped habitat bordering deep channels, whereas spotted and striped wolffish both concentrated most intensively into neighbouring deep water shelf habitats and relatively cold shallow to mid‐depth shelf habitats of the northern Gulf.The RDA analysis indicated a significant relationship between Gi* scores of the three species and environmental variables. The model explained 52% of the variability in the data; northern wolffish showed a distinct relationship compared with the two other species.The conservation of marine species and protection of their habitats pose a major challenge given the limited amount of information typically available on rare species and the scale and complexity of marine processes that affect those species. The broad‐scale approach presented here allows the provision of advice on important habitats on the basis of the best available knowledge. Copyright © 2013 Her Majesty the Queen in Right of Canada

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“…At the same time, the minimum number of nucleotide substitutions (44) is recorded between Anarrichthys ocellatus and Anarhichas lupus. It should be noted that North Atlantic wolffishes are characterized by low genetic diversity and low population differentiation [67,68], which is not typical for many other marine fishes (e.g., [70][71][72][73]). The materials analyzed by us, although few in number, confirm the previous conclusions [68].…”

Section: Geneticsmentioning

confidence: 99%

“…The results of genetic studies of the Anarhichadidae family representatives are few and have been performed using various genetic markers [50,[66][67][68][69]. At the same time, most of the previous phylogenetic studies did not involve all five valid species of the family.…”

Section: Geneticsmentioning

confidence: 99%

“…However, McCusker and Bentzen [67] using microsatellite loci showed the presence of genetic differences between samples from the Barents Sea and the rest of the North Atlantic. This may probably mean the presence of at It should be noted that North Atlantic wolffishes are characterized by low genetic diversity and low population differentiation [67,68], which is not typical for many other marine fishes (e.g., [70][71][72][73]). The materials analyzed by us, although few in number, confirm the previous conclusions [68].…”

Section: Geneticsmentioning

confidence: 99%

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First Record of the Northern Wolffish Anarhichas denticulatus Krøyer, 1845 (Anarhichadidae: Zoarcoidei: Perciformes) in the Siberian Arctic: Further Evidence of Atlantification?

Орлов

Orlova

Rybakov

et al. 2023

Climate

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A single specimen of the northern wolffish Anarhichas denticulatus Krøyer, 1845, 393 mm in length, was documented for the first time in the Siberian Arctic (Laptev Sea, Russia). Species identification was confirmed by an integrative taxonomic approach that included examination of external morphology and DNA barcoding using the COI mtDNA gene. This species is widely distributed in the North Atlantic, but records in the Arctic Ocean are limited to the Canadian and US coasts. This record might represent a significant range extension of about 7500 km for the species and may be associated with the eastward transport of a pelagic juvenile specimen from the Northeastern Atlantic to the Laptev Sea by the North Atlantic current, consistent with the hypothesis of Atlantification of the Arctic Ocean. X-ray images of the Laptev Sea specimen and photographs showing ontogenetic variations of species’ coloration are provided for reference. The Laptev Sea specimen had a more elongated shape, longer preorbital distance, and longer pectoral, dorsal, and anal fins, as well as a larger eye and wider caudal fin compared to North Atlantic samples. The size differences are likely associated with conditions experienced as a juvenile during the pelagic stage of the lifecycle.

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Limited population structure in Northern and Spotted Wolffishes (Anarhichas denticulatus and A. minor) despite low apparent dispersal potential

Cited by 7 publications

References 49 publications

The status of spotted wolffish, Anarhichas minor: A commercially ready species for U.S. marine aquaculture?

The status of spotted wolffish, Anarhichas minor: A commercially ready species for U.S. marine aquaculture?

Distribution and environmental relationships of three species of wolffish (Anarhichas spp.) in the Gulf of St. Lawrence

First Record of the Northern Wolffish Anarhichas denticulatus Krøyer, 1845 (Anarhichadidae: Zoarcoidei: Perciformes) in the Siberian Arctic: Further Evidence of Atlantification?

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