Mitochondrial DNA reveals historical maternal lineages and a postglacial expansion of the grey seal in European waters

Decker, Carole; Hassani, Sami; Jezequel,; Rault, Cyrielle; Dumas, Christian; Méheust, Eleonore; Alfonsi, Eric; Jung, Jean-Luc

doi:10.3354/meps12003

Cited by 4 publications

(6 citation statements)

References 53 publications

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“…Population genetic structure and gene ow Previously,Klimova et al (2014) reported the existence of three genetically distinct metapopulations, namely the Northwest Atlantic (including the Sable Island population), the Eastern Atlantic (comprising of the northern UK, including the northern North Sea and the Faroe Islands) and the Baltic Sea, results con rmed by mitochondrial analysis within the current study. Additionally, our results indicated the existence of two intraspeci c units within the Eastern Atlantic metapopulation, previously hypothesised byDecker et al (2017) based on the genetic distinctiveness of seals sampled in France from those sampled in the northern UK. The existence of two intraspeci c units is largely supported by pairwise differentiation, though Bayesian clustering (STRUCTURE and TESS) indicated the presence of only one genetic metapopulation within these data, as could be expected given that such approaches do not perform well when differentiation is low.…”

supporting

confidence: 75%

“…Genetic studies of grey seals to date have found signi cant genetic differentiation using nuclear and/ or mitochondrial markers between major oceanic areas, i.e. the Northwest Atlantic, Northeast Atlantic, and Baltic Sea (Klimova et al, 2014), and to a smaller extent between the Northeast Atlantic and the North Sea (Allen et al, 1995;ICES, 2014;Fietz et al, 2016) and within the Northeast Atlantic (Decker et al, 2017). Based on these ndings and telemetry data showing evidence of large-scale individual movements within the species outside the breeding season (Vincent et al, 2017;Carter et al, 2020), a single grey seal AU encompassing waters of the Northeast Atlantic, North Sea and Arctic waters (OSPAR Regions I, II and III) was proposed for assessing abundance trends (Banga et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

“…Among the newly generated data, 12 new haplotypes were described, with the remaining 177 haplotypes matching sequence data from previous studies (e.g. Fietz, Graves and Olsen, 2013;Klimova et al, 2014;Decker et al, 2017). Further information regarding speci c sequences and GenBank accession codes can be found in the Online Resource 4.…”

mentioning

confidence: 99%

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Genetic analysis in aid of delineation of Management Units for a wide-ranging marine mammal, the grey seal (Halichoerus grypus), in European waters

Steinmetz,

Murphy,

Cadhla

et al. 2024

Preprint

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The present study aims at filling genetic structure gaps of grey seals (Halichoerus grypus) in the Northeast Atlantic, where effective Management Units (MUs) must be established to fulfil international obligations set by OSPAR and the EU’s MSFD. Mitochondrial and nuclear genetic markers were analysed for seals from the island of Ireland, southwest England and the German/ Danish North Sea coasts, whereby the integration of previously published data led to the largest genetic dataset analysed for this species to date. Results revealed that individuals from the island of Ireland are part of a single interbreeding population, with Southwest England being a source of migrants to the island of Ireland, and the southern North Sea (Germany, Denmark) being either a source or sharing a common source of migrants to the island of Ireland. Based on observed genetic structure within the Northeast Atlantic, two MUs are proposed: (i) the Faroe Islands, Scotland and the North Sea and (ii) the island of Ireland, southwestern UK (Cornwall) and France. Additionally, Northwest Scotland and the English Channel/Dutch North Sea are proposed as transition zones. Given the species’ high mobility, an adaptive management plan based on an ongoing regional/ European scale monitoring programme is recommended.

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supporting

confidence: 75%

Section: Introductionmentioning

confidence: 99%

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Genetic analysis in aid of delineation of Management Units for a wide-ranging marine mammal, the grey seal (Halichoerus grypus), in European waters

Steinmetz,

Murphy,

Cadhla

et al. 2024

Preprint

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“…All molecular analysis followed the same methodology as previously described (Alfonsi et al, 2012;Decker et al, 2017;Sarano et al, 2021). Briefly, genomic DNA was extracted from the skin and biopsy samples using the NucleoSpin DNA RapidLyse R kit (Macherey-Nagel, Düren, Germany).…”

Section: Molecular Methods and Analysismentioning

confidence: 99%

Long Distance Runners in the Marine Realm: New Insights Into Genetic Diversity, Kin Relationships and Social Fidelity of Indian Ocean Male Sperm Whales

Girardet

Sarano²,

Richard

et al. 2022

Front. Mar. Sci.

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Adult male sperm whales (Physeter macrocephalus) are long distance runners of the marine realm, feeding in high latitudes and mating in tropical and subtropical waters where stable social groups of females and immatures live. Several areas of uncertainty still limit our understanding of their social and breeding behavior, in particular concerning the potential existence of geographical and/or social fidelities. In this study, using underwater observation and sloughed-skin sampling, we looked for male social fidelity to a specific matrilineal sperm whale group near Mauritius. In addition, we captured a wider picture of kin relationships and genetic diversity of male sperm whales in the Indian Ocean thanks to biopsies of eight individuals taken in a feeding ground near the Kerguelen and Crozet Archipelagos (Southern Indian Ocean). Twenty-six adult male sperm whales were identified when socializing with adult females and immatures off Mauritius. Sloughed-skin samples were taken from thirteen of them for genetic analysis. Long-term underwater observation recorded several noteworthy social interactions between adult males and adult females and/or immatures. We identified seven possible male recaptures over different years (three by direct observation, and four at the gametic level), which supports a certain level of male social fidelity. Two probable first- and thirty second-degree kin relationships were highlighted between members of the social unit and adult males, confirming that some of the adult males observed in Mauritian waters are reproductive. Male social philopatry to their natal group can be excluded, as none of the males sampled shared the haplotype characteristic of the matrilineal social group. Mitochondrial DNA control region haplotype and nucleotide diversities calculated over the 21 total male sperm whales sampled were similar to values found by others in the Indian Ocean. Our study strongly supports the existence of some levels of male sperm whale social fidelity, not directed to their social group of birth, in the Indian Ocean. Males sampled in breeding and feeding grounds are linked by kin relationships. Our results support a model of male mediated gene flow occurring at the level of the whole Indian Ocean, likely interconnected with large-scale geographical fidelity to ocean basin, and a small-scale social fidelity to matrilineal social groups.

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“…All molecular analysis followed the same methodology as previously described (Alfonsi et al, 2012;Decker et al, 2017;Sarano et al, 2021a). Briefly, genomic DNA was extracted from the skin and biopsy samples using the NucleoSpin DNA RapidLyse® kit (Macherey-Nagel, Düren, Germany).…”

Section: Molecular Methods and Analysismentioning

confidence: 99%

Long distance runners in the marine realm: New insights into genetic diversity, kin relationships and social fidelity of Indian Ocean male sperm whales

Girardet

Sarano²,

Richard

et al. 2021

Preprint

View full text Add to dashboard Cite

Adult male sperm whales (Physeter macrocephalus) are long distance runners of the marine realm, feeding in high latitudes and mating in tropical and subtropical waters where stable social groups of females and immatures live. Several areas of uncertainty still limit our understanding of their social and breeding behaviour, in particular concerning the potential existence of geographical and/or social fidelities.In this study, using underwater observation and sloughed-skin sampling, we looked for male social fidelity to a specific matrilineal sperm whale group near Mauritius. In addition, we captured a wider picture of kin relationships and genetic diversity of male sperm whales in the Indian Ocean thanks to biopsies of eight unique individuals taken in a feeding ground near the Kerguelen and Crozet Archipelagos (Southern Indian Ocean).Twenty-six adult male sperm whales, of which 13 were sampled, were identified when socializing with adult females and immatures off Mauritius. Long-term underwater observation recorded several noteworthy social interactions between adult males and adult females and/or immatures. We identified seven possible male recaptures over different years (three by direct observation, and four at the gametic level), which supports a certain level of male social fidelity. Several first- and second-degree kin relationships were highlighted between members of the social unit and adult males, confirming that some of the adult males observed in Mauritian waters are reproductive. Male social philopatry to their natal group can be excluded, as none of the males sampled shared the haplotype characteristic of the matrilineal social group. Mitochondrial DNA control region haplotype and nucleotide diversities calculated over the 21 total male sperm whales sampled were similar to values found by others in the Indian Ocean.Our study strongly supports the existence of some levels of male sperm whale social fidelity, not directed to their social group of birth, in the Indian Ocean. Males sampled in breeding and feeding grounds are linked by kin relationships. Our results support a model of male mediated gene flow occurring at the level of the whole Indian Ocean, likely interconnected with large-scale geographical fidelity to ocean basin, and a small-scale social fidelity to matrilineal social groups.

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Mitochondrial DNA reveals historical maternal lineages and a postglacial expansion of the grey seal in European waters

Cited by 4 publications

References 53 publications

Genetic analysis in aid of delineation of Management Units for a wide-ranging marine mammal, the grey seal (Halichoerus grypus), in European waters

Genetic analysis in aid of delineation of Management Units for a wide-ranging marine mammal, the grey seal (Halichoerus grypus), in European waters

Long Distance Runners in the Marine Realm: New Insights Into Genetic Diversity, Kin Relationships and Social Fidelity of Indian Ocean Male Sperm Whales

Long distance runners in the marine realm: New insights into genetic diversity, kin relationships and social fidelity of Indian Ocean male sperm whales

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