FN Archimer Export Format PT J TI Defining the stock structures of key commercial tunas in the Pacific Ocean II: Sampling considerations and future directions BT AF Moore, Bradley R. Adams, Tim Allain, Valerie Bell, Johann D. Bigler, Mark Bromhead, Don Clark, Sangaa Davies, Campbell Evans, Karen Faasili, Ueta Farley, Jessica Fitchett, Mark Grewe, Peter M. Hampton, John Hyde, John Leroy, Bruno Lewis, Antony Lorrain, Anne Macdonald, Jed I. Marie, Amandine D. Minte-Vera, Carolina Natasha, Janice Nicol, Simon Obregon, Pablo Peatman, Thomas Pecoraro, Carlo Phillip, N. Bradley Pilling, Graham M. Rico, Ciro Sanchez, Caroline Scott, Robert Scutt Phillips, Joe Stockwell, Brian Tremblay-Boyer, Laura Usu, Thomas Williams, Ashley J. Smith, Niamh AS 1:1,2;2:3;3:4;4:5,6;5:7;6:8;7:9;8:10;9:10;10:11;11:10;12:12;13:10;14:4;15:13;16:4;17:14;18:15;19:4;20:16;21:17;22:18;23:4,19;24:5;25:4;26:20;27:21;28:4;29:18,22;30:4;31:4;32:4;33:18;34:23;35:24;36:25,26;37:4; FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;11:;12:;13:;14:;15:;16:;17:;18:;19:;20:;21:;22:;23:;24:;25:;26:;27:;28:;29:;30:;31:;32:;33:;34:;35:;36:;37:; C1 National Institute of Water and Atmospheric Research, Nelson, 7010, New Zealand Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, TAS, 7001, Australia Fisheries Management Division, Forum Fisheries Agency, Honiara, Solomon Islands Oceanic Fisheries Programme, Pacific Community (SPC), Nouméa, BP D5 98848, New Caledonia Conservation International, Center for Oceans, 2011 Crystal Drive, Suite 600, Arlington, VA, 22202, USA Australian National Centre for Ocean Resources and Security, University of Wollongong, Wollongong, NSW 2522, Australia Marshall Islands Marine Resources Authority, Majuro, Republic of the Marshall Islands Australian Fisheries Management Authority, Canberra, ACT 2609, Australia The Parties to the Nauru Agreement (PNA) Office, Majuro, 96960, Republic of the Marshall Islands CSIRO Oceans and Atmosphere, GPO Box 1538, Hobart, TAS 7001, Australia Ministry of Agriculture and Fisheries, Apia, Samoa Western Pacific Regional Fishery Management Council, Honolulu, HI, 96813, USA National Oceanic and Atmospheric Administration, National Marine Fisheries Service, Southwest Fisheries Science Center, 8901 La Jolla Shores Dr., La Jolla, CA 92037, USA Ultramarine Consulting, Brisbane, Qld, 4068, Australia Institut de Recherche pour le Développement (IRD), Univ Brest, CNRS, Ifremer, LEMAR, F-29280, Plouzané, France ESE, Ecology and Ecosystems Health, Agrocampus Ouest, INRAE, 35042 Rennes, France Inter-American Tropical Tuna Commission, La Jolla, CA, 92037-1509, USA School of Marine Studies, The University of the South Pacific, Suva, Fiji Institute for Applied Ecology, University of Canberra, Bruce, ACT 2617, Australia Physalia-courses, Berlin, 10249, Germany National Oceanic Resource Management Authority, FSM National Government, Kolonia, Pohnpei, Federated States of Micronesia Instituto de Ciencias Marinas de Andalucía (ICMAN), Consejo Superior de Investigaciones Científicas, Campus Univ. Río San Pedro, 11510, Puerto Real, Cádiz, Spain Dragonfly Data Science, Te Aro, Wellington, 6011, New Zealand National Fisheries Authority, Port Moresby, Papua New Guinea Australian Bureau of Agricultural and Resource Economics and Sciences, Department of Agriculture, Canberra, ACT 2601, Australia Centre for Sustainable Tropical Fisheries and Aquaculture, College of Science and Engineering, James Cook University, Townsville, QLD 4811, Australia C2 NIWA, NEW ZEALAND UNIV TASMANIA, AUSTRALIA FISH MANAG DIV, SOLOMON ISLANDS SPC, FRANCE CONSERVAT INT, USA UNIV WOLL, AUSTRALIA MARSHALL ISLANDS MARINE RESOURCES AUTHORITY, MARSHALL ISLANDS AFMA, AUSTRALIA PARTIES NAURU AGREEMENT (PNA), MARSHALL ISLANDS CSIRO OCEANS AND ATMOSPHERE, AUSTRALIA MINIST AGR FISH, SAMOA WEST PAC REG FISH MANAG, USA NOAA, USA ULTRAMARINE CONSULTING, AUSTRALIA IRD, FRANCE AGROCAMPUS OUEST, FRANCE IATTC, USA UNIV SOUTH PACIFIC, FIJI UNIV CANBERRA, AUSTRALIA PHYSALIA-COURSES, GERMANY FSM NATL GOV, MICRONESIA ICMAN CSIC, SPAIN DRAGONFLY DATA SCI, NEW ZEALAND NATL FISH AUTHOR, PAPUA NEW GUINEA ABARES, AUSTRALIA UNIV JAMES COOK, AUSTRALIA UM LEMAR IN WOS Cotutelle UMR copubli-france copubli-europe copubli-int-hors-europe copubli-sud IF 2.422 TC 13 UR https://archimer.ifremer.fr/doc/00630/74168/73773.pdf LA English DT Article DE ;Tuna;Pacific Ocean;Movement;Spatial dynamics;Stock structure;Fisheries management AB Delineating the stock structure of highly-mobile, wide-ranging fishes subject to exploitation is a challenging task, yet one that is fundamental to optimal fisheries management. A case in point are stocks of skipjack tuna (Katsuwonus pelamis), yellowfin tuna (Thunnus albacares), bigeye tuna (Thunnus obesus) and albacore tuna (Thunnus alalunga) in the Pacific Ocean, which support important commercial, artisanal, subsistence, and recreational fisheries, and contribute roughly 70 % of global commercial tuna catches. Although some spatial and temporal structuring is recognised within these stocks, growing evidence from a range of approaches suggests that the stock structure of each tuna species is more complex than is currently assumed in both stock assessment and climate change models, and in management regimes. In a move towards improving understanding of the stock structure of skipjack, yellowfin, bigeye and South Pacific albacore tunas in the Pacific Ocean, an international workshop was held in Nouméa, New Caledonia, in October 2018 to review knowledge about their movement and stock structure in the region, define and discuss the main knowledge gaps and uncertainties concerning their stock structure, and develop biological sampling approaches to support the provision of this information. Here, we synthesise the discussions of this latter component. For each tuna species, we identify several general sampling considerations needed to reduce uncertainty, including i) the need for broadscale sampling in space, ideally covering each species’ distribution, targeting adults in spawning condition and adopting a phased approach; ii) the need for temporally-repeated sampling of the same geographical areas to assess stability in observed patterns over time; iii) the need to resolve patterns in spatial dynamics, such as those resulting from movements associated with the seasonal extensions of poleward flowing currents, from underlying stock structure, iv) the importance of adopting a multidisciplinary approach to stock identification, and v) the need for careful planning of logistics and coordination of sampling efforts across agencies. Finally, we present potential sampling designs that could be adopted to help overcome uncertainties around the initial identification of stocks and the provenance, mixing and proportional contributions of individuals in harvested assemblages, as well as how these uncertainties could be accounted for in fisheries management via the use of management strategy evaluation. PY 2020 PD OCT SO Fisheries Research SN 0165-7836 PU Elsevier BV VL 230 UT 000553385900001 DI 10.1016/j.fishres.2020.105524 ID 74168 ER EF