Spatio-temporal genetic tagging of a cosmopolitan planktivorous shark provides insight to gene flow, temporal variation and site-specific re-encounters.

Autor: Lieber L; School of Biological Sciences, University of Aberdeen, Zoology Building, Tillydrone Avenue, Aberdeen, AB24 2TZ, Scotland, UK.; School of Chemistry and Chemical Engineering, Queen´s University Belfast, Marine Laboratory, Portaferry, BT22 1PF, Northern Ireland, UK., Hall G; Manx Basking Shark Watch and Manx Wildlife Trust, Peel, Isle of Man, IM9 5PJ, UK., Hall J; Manx Basking Shark Watch and Manx Wildlife Trust, Peel, Isle of Man, IM9 5PJ, UK., Berrow S; Irish Basking Shark Study Group, Merchants Quay, Kilrush, County Clare, UK.; Marine and Freshwater Research Centre, Galway-Mayo Institute of Technology, Dublin Road, Galway, Ireland., Johnston E; Irish Basking Shark Study Group, Merchants Quay, Kilrush, County Clare, UK.; School of Biological Sciences, Queen´s University Belfast, Belfast, Northern Ireland, UK., Gubili C; School of Biological Sciences, University of Aberdeen, Zoology Building, Tillydrone Avenue, Aberdeen, AB24 2TZ, Scotland, UK.; Hellenic Agricultural Organisation, Fisheries Research Institute, Nea Peramos, Kavala, Macedonia, 64007, Greece., Sarginson J; School of Biological Sciences, University of Aberdeen, Zoology Building, Tillydrone Avenue, Aberdeen, AB24 2TZ, Scotland, UK.; Faculty of Science and Engineering, John Dalton Building, Manchester Metropolitan University, Chester Street, Manchester, M1 5GD, UK., Francis M; National Institute of Water and Atmospheric Research, Private Bag 14901, Kilbirnie, Wellington, 6241, New Zealand., Duffy C; Department of Conservation, Private Bag 68908, Wellesley Street, Auckland, 1141, New Zealand., Wintner SP; KwaZulu-Natal Sharks Board, Private Bag 2, Umhlanga Rocks, 4320, South Africa.; School of Life Sciences, University of KwaZulu-Natal, Durban, 4000, South Africa., Doherty PD; Centre for Ecology and Conservation, University of Exeter, Cornwall Campus, Penryn, TR10 9FE, UK.; Environment and Sustainability Institute, University of Exeter, Cornwall Campus, Penryn, TR10 9FE, UK., Godley BJ; Centre for Ecology and Conservation, University of Exeter, Cornwall Campus, Penryn, TR10 9FE, UK.; Environment and Sustainability Institute, University of Exeter, Cornwall Campus, Penryn, TR10 9FE, UK., Hawkes LA; Centre for Ecology and Conservation, University of Exeter, Cornwall Campus, Penryn, TR10 9FE, UK., Witt MJ; Centre for Ecology and Conservation, University of Exeter, Cornwall Campus, Penryn, TR10 9FE, UK.; Environment and Sustainability Institute, University of Exeter, Cornwall Campus, Penryn, TR10 9FE, UK., Henderson SM; Scottish Natural Heritage Great Glen House, Inverness, IV3 8NW, Scotland, UK., de Sabata E; MedSharks, via Ruggero Fauro 82, 00197, Rome, Italy., Shivji MS; Save Our Seas Shark Research Center and Guy Harvey Research Institute, Nova Southeastern University, 8000 North Ocean Drive, Dania Beach, FL, 33004, USA., Dawson DA; NERC Biomolecular Analysis Facility, Department of Animal and Plant Sciences, University of Sheffield, Sheffield, S10 2TN, South Yorkshire, UK., Sims DW; Marine Biological Association of the United Kingdom, The Laboratory, Citadel Hill, Plymouth, PL1 2PB, UK.; Ocean and Earth Science, National Oceanography Centre Southampton, University of Southampton, Waterfront Campus, Southampton, SO14 3ZH, UK., Jones CS; School of Biological Sciences, University of Aberdeen, Zoology Building, Tillydrone Avenue, Aberdeen, AB24 2TZ, Scotland, UK., Noble LR; School of Biological Sciences, University of Aberdeen, Zoology Building, Tillydrone Avenue, Aberdeen, AB24 2TZ, Scotland, UK. leslie.r.noble@nord.no.; Faculty of Biosciences and Aquaculture, Nord University, Postboks 1490, 8049, Bodø, Norway. leslie.r.noble@nord.no.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2020 Feb 03; Vol. 10 (1), pp. 1661. Date of Electronic Publication: 2020 Feb 03.
DOI: 10.1038/s41598-020-58086-4
Abstrakt: Migratory movements in response to seasonal resources often influence population structure and dynamics. Yet in mobile marine predators, population genetic consequences of such repetitious behaviour remain inaccessible without comprehensive sampling strategies. Temporal genetic sampling of seasonally recurring aggregations of planktivorous basking sharks, Cetorhinus maximus, in the Northeast Atlantic (NEA) affords an opportunity to resolve individual re-encounters at key sites with population connectivity and patterns of relatedness. Genetic tagging (19 microsatellites) revealed 18% of re-sampled individuals in the NEA demonstrated inter/multi-annual site-specific re-encounters. High genetic connectivity and migration between aggregation sites indicate the Irish Sea as an important movement corridor, with a contemporary effective population estimate (N e ) of 382 (CI = 241-830). We contrast the prevailing view of high gene flow across oceanic regions with evidence of population structure within the NEA, with early-season sharks off southwest Ireland possibly representing genetically distinct migrants. Finally, we found basking sharks surfacing together in the NEA are on average more related than expected by chance, suggesting a genetic consequence of, or a potential mechanism maintaining, site-specific re-encounters. Long-term temporal genetic monitoring is paramount in determining future viability of cosmopolitan marine species, identifying genetic units for conservation management, and for understanding aggregation structure and dynamics.
Databáze: MEDLINE
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