FN Archimer Export Format
PT J
TI Otolith δ18O Composition as a Tracer of Yellowfin Tuna (Thunnus albacares) Origin in the Indian Ocean
BT 
AF Artetxe-Arrate, Iraide
   Fraile, Igaratza
   Farley, Jessica
   Darnaude, Audrey M.
   Clear, Naomi
   Dettman, David L.
   Davies, Campbell
   Marsac, Francis
   Murua, Hilario
AS 1:1;2:1;3:2;4:3;5:2;6:4;7:2;8:5;9:6;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;
C1 AZTI, Marine Research, Basque Research and Technology Alliance (BRTA), 20110 Pasaia, Gipuzkoa, Spain
   CSIRO Oceans and Atmosphere, Hobart, Tasmania 7000, Australia
   Marbec, University Montpellier, CNRS, Ifremer, IRD, 34095 Montpellier, France
   Environmental Isotope Laboratory, Department of Geosciences, University of Arizona, Tucson, AZ 85721, USA
   Marbec, University Montpellier, CNRS, Ifremer, IRD, 34203 Sete, France
   International Seafood Sustainability Foundation, Washington, DC 20005, USA
C2 AZTI, SPAIN
   CSIRO OCEANS AND ATMOSPHERE, AUSTRALIA
   CNRS, FRANCE
   UNIV ARIZONA, USA
   IRD, FRANCE
   ISS FND, USA
UM MARBEC
IN WOS Cotutelle UMR
   DOAJ
   copubli-europe
   copubli-int-hors-europe
TC 5
UR https://archimer.ifremer.fr/doc/00706/81758/86429.pdf
   https://archimer.ifremer.fr/doc/00706/81758/86430.zip
LA English
DT Article
DE ;oxygen isotope analysis;otolith chemistry;yellowfin tuna;SIMS;stock structure;connectivity;Indian Ocean
AB Yellowfin tuna of the Indian Ocean is overfished, and a better understanding of the stock structure is needed to enable sustainable management. Here, otolith δ18O values of young-of-the-year fish from known nursery areas of the equatorial Indian Ocean (West, Central and East) were used to establish a reference isotopic signature to predict the origin of sub-adult and adult individuals. Sub-adult tuna otolith δ18O values from Reunion Island were similar to the West nursery signature, but otolith δ18O values of sub-adults from Pakistan were unlike any of the nurseries sampled. Therefore, δ18O values from the Pakistan area samples were considered an additional nursery source for predicting the origin of adult tuna, using a multinomial logistic regression classification method. The western equatorial area was the most productive nursery for three fishing grounds sampled, with a minor contribution of Pakistan-like origin fish. Contribution of Central or East nurseries to the adult population was negligible. One adult otolith was analysed by secondary ion mass spectrometry along the otolith growth transect and results were compared with an isoscape approach to infer lifetime movements. This study is an important first step towards understanding the spatial structure and connectivity of the species 
PY 2021
PD SEP
SO Oceans-switzerland
SN 2673-1924
PU MDPI AG
VL 2
IS 3
UT 001010394000001
BP 461
EP 476
DI 10.3390/oceans2030026
ID 81758
ER

EF