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\begin{document}

\title{From rivers to ocean basins: the role of ocean barriers and philopatry
in the genetic structuring of a cosmopolitan coastal predator}



\author[1]{Floriaan Devloo-Delva}%
\author[2]{Christopher Burridge}%
\author[3]{Peter Kyne}%
\author[4]{Juerg Brunnschweiler}%
\author[5]{Demian Chapman}%
\author[6]{Patricia Charvet}%
\author[7]{Xiao Chen}%
\author[8]{Geremy Cliff}%
\author[9]{Ryan Daly}%
\author[10]{Marcus Drymon}%
\author[11]{Mario Espinoza}%
\author[12]{Daniel Fernando}%
\author[13]{Laura Garcia Barcia}%
\author[14]{Kerstin Glaus}%
\author[15]{Blanca Gonzalez-Garza}%
\author[16]{Michael Grant}%
\author[1]{Rasanthi Gunasekera}%
\author[17]{Sebastian Hernandez}%
\author[18]{Susumu Hyodo}%
\author[19]{Rima Jabado}%
\author[20]{Sebastien Jaquemet}%
\author[21]{Grant Johnson}%
\author[22]{James Ketchum}%
\author[20]{Hélène Magalon}%
\author[2]{James Marthick}%
\author[23]{Frederik Mollen}%
\author[24]{Stefano Mona}%
\author[25]{Gavin Naylor}%
\author[26]{John Nevill}%
\author[27]{Nicole Phillips}%
\author[1]{Richard Pillans}%
\author[20]{Bautisse Postaire}%
\author[28]{Amy Smoothey}%
\author[29]{Katsunori Tachihara}%
\author[30]{Bree Tillett}%
\author[11]{Jorge Valerio-Vargas}%
\author[1]{Pierre Feutry}%
\affil[1]{Commonwealth Scientific and Industrial Research Organisation}%
\affil[2]{University of Tasmania}%
\affil[3]{Charles Darwin University}%
\affil[4]{Independent Researcher}%
\affil[5]{Florida International University Biscayne Bay Campus}%
\affil[6]{Universidade Federal do Ceará}%
\affil[7]{South China Agricultural University}%
\affil[8]{KwaZulu-Natal Sharks Board Maritime Centre of Excellence}%
\affil[9]{South African Association for Marine Biological Research}%
\affil[10]{Mississippi State University}%
\affil[11]{Universidad de Costa Rica}%
\affil[12]{Blue Resources Trust}%
\affil[13]{Florida International University}%
\affil[14]{The University of the South Pacific}%
\affil[15]{Pelagios-Kakunja}%
\affil[16]{James Cook University}%
\affil[17]{Universidad VERITAS}%
\affil[18]{The University of Tokyo}%
\affil[19]{Elasmo Project}%
\affil[20]{Université de la Réunion}%
\affil[21]{Northern Territory Government}%
\affil[22]{MigraMar}%
\affil[23]{Elasmobranch Research}%
\affil[24]{Muséum National d'Histoire Naturelle}%
\affil[25]{University of Florida}%
\affil[26]{Environment Seychelles}%
\affil[27]{University of Southern Mississippi}%
\affil[28]{New South Wales Government}%
\affil[29]{University of the Ryukyus}%
\affil[30]{The University of Queensland Diamantina Institute}%


\vspace{-1em}



  
  \date{May 26, 2024}


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\selectlanguage{english}
\begin{abstract}
Understanding the population structure of a species is important to
accurately assess its conservation status and manage the risk of local
extinction. The Bull Shark (\emph{Carcharhinus leucas}) faces varying
levels of exploitation around the world due to its coastal distribution.
Information regarding population connectivity is crucial to evaluate its
conservation status and local fishing impacts. In this study, we sampled
922 putative Bull Sharks from 19 locations in the first global
assessment of population structure of this cosmopolitan species. Using a
recently developed DNA-capture approach (DArTcap), samples were
genotyped for 3,400 nuclear markers. Additionally, full mitochondrial
genomes of 384 Indo-Pacific samples were sequenced. Reproductive
isolation was found between and across ocean basins (eastern Pacific,
western Atlantic, eastern Atlantic, Indo-West Pacific) with distinct
island populations in Japan and Fiji. Bull Sharks appear to maintain
reproductive connectivity using shallow coastal waters as dispersal
corridors, whereas large oceanic distances and historical land-bridges
act as barriers. Females tend to return to the same area for
reproduction, making them more susceptible to local threats and an
important focus for management actions. Given these behaviours, the
exploitation of Bull Sharks from insular populations, such as Japan and
Fiji, may instigate local decline that cannot readily be replenished by
immigration, which can in turn affect ecosystem dynamics and functions.
These data also supported the development of a genetic panel to
ascertain the population of origin, which will be useful in monitoring
the trade of fisheries products and assessing population-level impacts
of this harvest.%
\end{abstract}%



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\textbf{Hosted file}

\verb`Devloo-Delva et al. Global population structure of the bull shark.docx`  available at \url{https://authorea.com/users/492082/articles/590258-from-rivers-to-ocean-basins-the-role-of-ocean-barriers-and-philopatry-in-the-genetic-structuring-of-a-cosmopolitan-coastal-predator}

\selectlanguage{english}
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