Population Structure and Microevolution of Pacific Cod Gadus macrocephalus Based on the Analysis of the Control Region (mtDNA) Polymorphism

Orlova, S. Yu.; Смирнова, М. А.; Stroganov, A. N.; Mukhametov, I. N.; Смирнов, А. А.; Tok, Kim Sen; Park, J. H.; Орлов, А. М.

doi:10.1134/s1022795419040100

Cited by 9 publications

(3 citation statements)

References 32 publications

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“…Microsatellite DNA showed samples from the eastern coast of the Korean Peninsula and the more northern Hokkaido, Japan, to be less differentiated than samples from the eastern and western coasts of the Korean Peninsula ( F ST = 0.019 and 0.033, respectively; Kim et al, 2010). F ST calculated from mitochondrial DNA also showed greater differentiation between samples from the Korean Peninsula’s western and eastern coasts ( F ST = 0.128) than between samples from the eastern Korean coast and sites in the north/northwestern Sea of Okhotsk ( F ST = 0.029–0.056; Orlova et al, 2019). Further research may reveal whether existing gene flow is sufficient to export adaptive alleles from the Korean peripheral populations to more northern Pacific cod, or whether assisted gene flow (Aitken & Whitlock, 2013) should be attempted, keeping in mind potential risks associated with outbreeding depression and domestication selection in hatchery programs (Naish et al, 2008).…”

Section: Discussionmentioning

confidence: 94%

Genetic structure and dispersal in peripheral populations of a marine fish (Pacific cod, Gadus macrocephalus) and their importance for adaptation to climate change

Fisher

Helser

Sukyung

et al. 2021

Ecology and Evolution

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Small and isolated peripheral populations, which are often remnants of glacial refugia, offer an opportunity to determine the magnitude and direction of fine‐scale connectivity in high gene flow marine species. When located at the equatorial edge of a species’ range, these populations may also harbor genetic diversity related to survival and reproduction at higher temperatures, a critical resource for marine species facing warming ocean temperatures. Pacific cod (Gadus macrocephalus), a marine fish in the North Pacific, has already experienced major shifts in biomass and distribution linked to climate change. We estimated the magnitude and direction of connectivity between peripheral populations of Pacific cod at the southern edge of the species’ range, by conducting restriction site‐associated DNA (RAD) sequencing and individual assignment on fish collected around the Korean Peninsula during the spawning season. Three populations on the western, eastern, and southern Korean coasts were highly differentiated (FST = 0.025–0.042) and relatively small (Ne = 433–1,777). Ten putative dispersers and estimates of contemporary migration rates revealed asymmetrical, west‐to‐east movement around the Korean Peninsula, at a higher rate than predicted by indirect estimates of connectivity (FST). Allele frequencies at 87 RAD loci were decisively correlated with strong marine temperature gradients between the warmer southern coast and the cooler waters of the eastern and western coasts. Despite relatively small sample sizes, our data suggest asymmetrical dispersal and gene flow, potentially involving adaptive alleles, between peripheral populations inhabiting markedly different thermal regimes. Our study emphasizes the conservation value of peripheral populations in high gene flow marine fish species.

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Section: Discussionmentioning

confidence: 94%

Genetic structure and dispersal in peripheral populations of a marine fish (Pacific cod, Gadus macrocephalus) and their importance for adaptation to climate change

Fisher

Helser

Sukyung

et al. 2021

Ecology and Evolution

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“…Remarkably, specimens from the Sea of Okhotsk are genetically close to the White Sea specimens (pairwise F ST = 0.37828), suggesting that the gene flow between these two distant localities might have occurred in the recent past. At the same time, the Sea of Japan population is distinct from that of the Sea of Okhotsk (F ST = 0.72393), despite these areas having a hydrological connection and a shared biological and genetic diversity [80][81][82]. The genetic distinctness of geographically close and distant populations eliminates anthropogenic transportation as a primary driver for the wide species distribution.…”

Section: Phylogeographymentioning

confidence: 98%

Integrative Analysis of Retusa pertenuis (Heterobranchia: Cephalaspidea) from Arctic and Russian Far East Seas with Discussion of Its Morphology, Validity and Population Structure

Chaban,

Ekimova,

Stanovova

et al. 2023

Diversity

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Retusa pertenuis is still formally considered a junior subjective synonym of Retusa obtusa, despite previous data indicating R. pertenuis and R. obtusa differ significantly in copulatory system morphology. In this paper, we study the species identity and population structure of R. pertenuis with an integrative approach combining morphological and molecular data. The external morphology, head copulatory system and gizzard plates were studied using light microscopy and scanning electron microscopy. We also obtained two mitochondrial (COI and 16S) and two nuclear (H3 and 28S) markers to test the monophyly of R. pertenuis and R. obtusa. Populations from the White Sea, Sea of Okhotsk and Sea of Japan were studied using COI and 18S molecular markers. Our results show that Retusa obtusa sensu lato represents a species complex of at least four species: the nominative species occurring in the North Atlantic, the widely distributed R. pertenuis and two additional species whose identities should be clarified in further studies. Retusa pertenuis geographic range encompasses the North Atlantic, Eurasia’s northern seas, the Canadian Arctic, the Bering Sea, the Sea of Okhotsk and the Sea of Japan. Within R. pertenuis’s range, this species demonstrates a wide variability in shell morphology.

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“…Наибольшее освоение выделенных ресурсов вида наблюдается у берегов восточной и юго-западной Камчатки, наимень- В северо-западной части Берингова моря (в пределах акватории Западно-Беринговоморской и Чукотской зон) встречаются преимущественно две группировки трески: местная анадырско-наваринская и восточно-беринговоморская, рыбы которой в летне-осенний период мигрируют из восточной части моря. При этом необходимо отметить обособленность трески анадырско-наваринского района, выявленной на основе анализа генетических и морфобиологических характеристик [4][5][6][7][8]. По одним данным, основу биомассы вида в северо-западной части моря летом составляют половозрелые особи, приходящие на нагул из восточной ее части [9], по другим -рыба анадырско-наваринской и, в период высокой численности, карагинской группировок [10].…”

Section: For Citationunclassified

Current state of Pacific cod stocks in the northwestern part of the Bering Sea and prospects for its fishery

Datsky,

Antonov,

Savin

2023

Fisheries

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The article presents data on the fishery and stock status of Pacific cod in the northwestern part of the Bering Sea for the period from 1968 to 2024. It is shown that the increase in commercial stocks of this species to an abnormally high level (1.1-1.6 million tons) was due to the warming of water masses in the north of the sea and the formation of an accessible food supply, which contributed to the emergence of several productive generations and determined a high level of fish migration from the eastern parts of the sea. The significant biomass of Pacific cod made it possible to increase its predicted and actual catches to 120.0 and 105.3 thousand tons, respectively. The process of cooling of the Bering Sea waters, which began in 2021, with a simultaneous increase in the area of the cold Laurentian spot, limiting the spread of cod aggregations to the north-west of the sea, the exit of numerous generations of 2011, 2017, 2018 from fishery and the lack of new productive generations led to a decrease in fish stocks and catches to the average long-term level. The ongoing processes in the population dynamics of Pacific cod in the northwestern Bering Sea and the accompanying consequences for the efficiency of its fishery must be taken into account when making specific management decisions regarding resource users of this species.

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Population Structure and Microevolution of Pacific Cod Gadus macrocephalus Based on the Analysis of the Control Region (mtDNA) Polymorphism

Cited by 9 publications

References 32 publications

Genetic structure and dispersal in peripheral populations of a marine fish (Pacific cod, Gadus macrocephalus) and their importance for adaptation to climate change

Genetic structure and dispersal in peripheral populations of a marine fish (Pacific cod, Gadus macrocephalus) and their importance for adaptation to climate change

Integrative Analysis of Retusa pertenuis (Heterobranchia: Cephalaspidea) from Arctic and Russian Far East Seas with Discussion of Its Morphology, Validity and Population Structure

Current state of Pacific cod stocks in the northwestern part of the Bering Sea and prospects for its fishery

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