Stock delineation of migratory and resident Pacific hake in Canadian waters

King, Jacquelynne R.; McFarlane, Gordon A.; Jones, Simon R. M.; Gilmore, Scott; Abbott, Cathryn L.

doi:10.1016/j.fishres.2010.12.024

Cited by 14 publications

(11 citation statements)

References 14 publications

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“…King et al . () report a prevalence of 91.7% in summer Queen Charlotte Strait stocks located near less unaffected farms. Using histology, this study demonstrated prevalences ranging from 30.8% to 91.7% out of 95 Pacific hake caught in regions where farmed Atlantic salmon are less affected but 100% prevalence in fish caught in the Strait of Georgia (King et al .…”

Section: Discussionmentioning

confidence: 99%

“…Interestingly, infection prevalence in wild hake sampled along the coast of British Colombia does not show a parallel regional distribution to infected farmed salmon. King et al (2012) report a prevalence of 91.7% in summer Queen Charlotte Strait stocks located near less unaffected farms. Using histology, this study demonstrated prevalences ranging from 30.8% to 91.7% out of 95 Pacific hake caught in regions where farmed Atlantic salmon are less affected but 100% prevalence in fish caught in the Strait of Georgia (King et al 2012).…”

Section: Infection Dynamicsmentioning

confidence: 97%

“…King et al (2012) report a prevalence of 91.7% in summer Queen Charlotte Strait stocks located near less unaffected farms. Using histology, this study demonstrated prevalences ranging from 30.8% to 91.7% out of 95 Pacific hake caught in regions where farmed Atlantic salmon are less affected but 100% prevalence in fish caught in the Strait of Georgia (King et al 2012). It is curious why northern populations of hake are more infected than farmed Atlantic salmon in the same region, but the migratory ranges of hake populations are not well understood.…”

Section: Infection Dynamicsmentioning

confidence: 97%

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Long‐term epidemiological survey of Kudoa thyrsites (Myxozoa) in Atlantic salmon (Salmo salar L.) from commercial aquaculture farms

Marshall

Sitjà‐Bobadilla

Brown

et al. 2015

Journal of Fish Diseases

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Kudoa thyrsites (Myxozoa) encysts within myocytes of a variety of fishes. While infected fish appear unharmed, parasite-derived enzymes degrade the flesh post-mortem. In regions of British Columbia (BC), Canada, up to 4-7% of fillets can be affected, thus having economic consequences and impacting the competitiveness of BC's farms. K. thyrsites was monitored in two farms having high (HP) or low (LP) historical infection prevalence. At each farm, 30 fish were sampled monthly for blood and muscle during the first year followed by nine samplings during year two. Prevalence and intensity were measured by PCR and histology of muscle samples. In parallel, fillet tests were used to quantify myoliquefaction. Infections were detected by PCR after 355 and 509 degree days at LP and HP farms, respectively. Prevalence reached 100% at the HP farm by 2265 degree days and declined during the second year, whereas it plateaued near 50% at the LP farm. Infection intensities decreased after 1 year at both farms. Blood was PCR-positive at both farms between 778 and 1113 degree days and again after 2000 degree days. This is the first monitoring project in a production environment and compares data between farms with different prevalence.

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Section: Discussionmentioning

confidence: 99%

Section: Infection Dynamicsmentioning

confidence: 97%

Section: Infection Dynamicsmentioning

confidence: 97%

See 1 more Smart Citation

Long‐term epidemiological survey of Kudoa thyrsites (Myxozoa) in Atlantic salmon (Salmo salar L.) from commercial aquaculture farms

Marshall

Sitjà‐Bobadilla

Brown

et al. 2015

Journal of Fish Diseases

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show abstract

“…A similar phenomenon occurs in Puget Sound, where large-scale reflux via mixing sills and small-scale circulation patterns (e.g. nearshore eddies) may affect larval dispersal and limit gene flow among populations of several species [ 22 , 35 – 37 ]. To date, there has been no attempt to examine oceanographic factors influencing genetic structure in North Pacific hake.…”

Section: Introductionmentioning

confidence: 92%

Role of oceanography in shaping the genetic structure in the North Pacific hake Merluccius productus

León¹,

Galván‐Tirado²,

Velasco

et al. 2018

PLoS ONE

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Determining the relative influence of biotic and abiotic factors on genetic connectivity among populations remains a major challenge in evolutionary biology and in the management and conservation of species. North Pacific hake (Merluccius productus) inhabits upwelling regions in the California Current ecosystem from the Gulf of California to the Gulf of Alaska. In this study, we examined mitochondrial DNA (mtDNA) and microsatellite variation to estimate levels of genetic differentiation of M. productus in relation to the role of oceanographic features as potential barriers to gene flow. Samples were obtained from nine sites spanning a large part of the geographic range of the species, from Puget Sound, Washington to Costa Rica. The microsatellite results revealed three genetically discrete populations: one spanning the eastern Pacific coast, and two apparently resident populations circumscribed to the Puget Sound and the northern Gulf of California (FST = 0.032, p = 0.036). Cytochrome b sequence data indicated that isolation between the Puget Sound and northern Gulf of California populations from the coastal Pacific were recent phenomena (18.5 kyr for Puget Sound and 40 kyr for the northern Gulf of California). Oceanographic data obtained from the Gulf of California support the hypothesis that permanent fronts within the region, and strong gradients at the entrance to the Gulf of California act as barriers to gene flow. A seascape genetics approach found significant genetic–environment associations, where the daytime sea surface temperature and chlorophyll concentrations were the best predictive variables for the observed genetic differentiation. Considering the potential causes of genetic isolation among the three populations, e.g. spawning areas in different latitudes associated with upwelling processes, oceanographic barriers, asymmetric migration and specialized diet, oceanographic barriers appear to be a likely mechanism restricting gene flow.

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“…Estas variações se devem principalmente à presença de sucessivas repetições em algumas regiões, o que dificulta substancialmente a realização das reações de amplificação utilizando primers descritos para espécies diferentes (Meyer, 1993). As dificuldades de amplificação da região controle em uma única reação e utilizando primers universais foram reportadas em trabalhos para peixes ósseos (e.g., King et al, 2012) e elasmobrânquios (e.g., Castro et al, 2007) Figura 12. Alinhamento de sequências de partes do genoma mitocondrial (A: tRNA-Pro; B: tRNA-Phe) de espécies de Gadiformes disponíveis no GenBank.…”

Section: Sequenciamentosunclassified

The deep sea teleost fish fauna of the Brazilian North Coast

et al. 2020

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Data on the deep sea fishes found off the northern Brazilian coast are restricted to the results of the surveys of the RV Oregon, a research vessel of the North American National Marine Fisheries Service, and the REVIZEE Program. The REVIZEE Score-Norte Program focused on commercial fish species and natural resources with potential for exploitation on the continental shelf and slope off the northern coast of Brazil. In this sense, the REVIZEE Score-Norte Program generated little information on species of no commercial value, did not catalog its inventory in zoological collections, and did not publish species lists. Given this considerable knowledge gap on the deep-sea fish found off the North coast of Brazil, we compiled all the available data on the deep-sea fish of this region and also retrieved photographic records from the REVIZEE Score-Norte Program, including the PRODEMERSAL and PROTUNA projects. Considering the published records, specimens deposited in zoological collections, and the interpretation of photographic records, we compiled a list of 63 species of deep-sea fish from the North coast of Brazil. An additional 30 species were found in the published records from the PRODEMERSAL and PROTUNA, but were considered to be doubtful or pending confirmation.

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Stock delineation of migratory and resident Pacific hake in Canadian waters

Cited by 14 publications

References 14 publications

Long‐term epidemiological survey of Kudoa thyrsites (Myxozoa) in Atlantic salmon (Salmo salar L.) from commercial aquaculture farms

Long‐term epidemiological survey of Kudoa thyrsites (Myxozoa) in Atlantic salmon (Salmo salar L.) from commercial aquaculture farms

Role of oceanography in shaping the genetic structure in the North Pacific hake Merluccius productus

The deep sea teleost fish fauna of the Brazilian North Coast

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