Restricted connectivity and population genetic fragility in a globally endangered Hammerhead Shark

Vagile, large-bodied marine organisms frequently have wide range dispersion but also dependence on coastal habitats for part of their life history. These characteristics may induce complex population genetic structure patterns, with resulting implications for the management of exploited populations....

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Bibliographic Details
Published in:Reviews in fish biology and fisheries 2020-09, Vol.30 (3), p.501-517
Main Authors: Pinhal, Danillo, Domingues, Rodrigo R., Bruels, Christine C., Ferrette, Bruno L. S., Gadig, Otto B. F., Shivji, Mahmood S., Martins, Cesar
Format: Article
Language:English
Subjects:
Animal behavior
Biomedical and Life Sciences
Coastal ecology
Coastal waters
Endangered & extinct species
Endangered species
Flow pattern
Fragility
Freshwater & Marine Ecology
Gene flow
Genetic diversity
Genetic markers
Genetic structure
Genetic variation
Life history
Life Sciences
Management
Marine fishes
Marine molluscs
Marine organisms
Markers
Microsatellites
Migrations
Mitochondria
Original Research
Overfishing
Parturition
Philopatry
Population
Population differentiation
Population genetics
Population number
Rare species
Sharks
Sphyrna lewini
Subdivisions
Tropical climate
Wildlife conservation
Zoology
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Summary:Vagile, large-bodied marine organisms frequently have wide range dispersion but also dependence on coastal habitats for part of their life history. These characteristics may induce complex population genetic structure patterns, with resulting implications for the management of exploited populations. The scalloped hammerhead, Sphyrna lewini , is a cosmopolitan, migratory shark in tropical and warm temperate waters, inhabiting coastal bays during parturition and juvenile development, and the open ocean as adults. Here, we investigated the genetic connectivity and diversity of S. lewini in the western Atlantic using large sample coverage (N = 308), and data from whole mitochondrial control region (mtCR) sequences and ten nuclear microsatellite markers We detected significant population genetic structure with both mtCR and microsatellites markers (mtCR: Φ ST  = 0.60; p  
ISSN:0960-3166
1573-5184
DOI:10.1007/s11160-020-09607-x