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Escalle L, Scutt Phillips J, Lopez J, Lynch JM, Murua H, Royer SJ, Swimmer Y, Murua J, Sen Gupta A, Restrepo V, Moreno G. Simulating drifting fish aggregating device trajectories to identify potential interactions with endangered sea turtles. CONSERVATION BIOLOGY : THE JOURNAL OF THE SOCIETY FOR CONSERVATION BIOLOGY 2024:e14295. [PMID: 38766922 DOI: 10.1111/cobi.14295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 01/23/2024] [Accepted: 03/05/2024] [Indexed: 05/22/2024]
Abstract
Purse-seine fishers using drifting fish aggregating devices (dFADs), mainly built with bamboo, plastic buoys, and plastic netting, to aggregate and catch tropical tuna, deploy 46,000-65,000 dFADs per year in the Pacific Ocean. Some of the major concerns associated with this widespread fishing device are potential entanglement of sea turtles and other marine fauna in dFAD netting; marine debris and pollution; and potential ecological damage via stranding on coral reefs, beaches, and other essential habitats for marine fauna. To assess and quantify the potential connectivity (number of dFADs deployed in an area and arriving in another area) between dFAD deployment areas and important oceanic or coastal habitat of critically endangered leatherback (Dermochelys coriacea) and hawksbill (Eretmochelys imbricata) sea turtles in the Pacific Ocean, we conducted passive-drift Lagrangian experiments with simulated dFAD drift profiles and compared them with known important sea turtle areas. Up to 60% of dFADs from equatorial areas were arriving in essential sea turtle habitats. Connectivity was less when only areas where dFADs are currently deployed were used. Our simulations identified potential regions of dFAD interactions with migration and feeding habitats of the east Pacific leatherback turtle in the tropical southeastern Pacific Ocean; coastal habitats of leatherback and hawksbill in the western Pacific (e.g., archipelagic zones of Indonesia, Papua New Guinea, and Solomon Islands); and foraging habitat of leatherback in a large equatorial area south of Hawaii. Additional research is needed to estimate entanglements of sea turtles with dFADs at sea and to quantify the likely changes in connectivity and distribution of dFADs under new management measures, such as use of alternative nonentangling dFAD designs that biodegrade, or changes in deployment strategies, such as shifting locations.
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Affiliation(s)
- Lauriane Escalle
- Oceanic Fisheries Programme, The Pacific Community (SPC), Nouméa, New Caledonia
| | - J Scutt Phillips
- Oceanic Fisheries Programme, The Pacific Community (SPC), Nouméa, New Caledonia
| | - J Lopez
- Ecosystem and Bycatch Program, Inter-American Tropical Tuna Commission (IATTC), La Jolla, California, USA
| | - J M Lynch
- Center for Marine Debris Research (CMDR), Hawaii Pacific University (HPU), Waimanalo, Hawaii, USA
- Chemical Sciences Division, National Institute of Standards and Technology (NIST), Waimanalo, Hawaii, USA
| | - H Murua
- International Seafood Sustainability Foundation (ISSF), Pittsburgh, Pennsylvania, USA
| | - S J Royer
- Center for Marine Debris Research (CMDR), Hawaii Pacific University (HPU), Waimanalo, Hawaii, USA
- The Ocean Cleanup, Rotterdam, The Netherlands
| | - Y Swimmer
- NOAA Fisheries, Pacific Islands Fisheries Science Center, Honolulu, Hawaii, USA
| | - J Murua
- AZTI Tecnalia, Sukarrieta, Spain
| | - Alex Sen Gupta
- Climate Change Research Centre and ARC Centre of Excellence for Climate Extremes, University of New South Wales, Sydney, New South Wales, Australia
| | - V Restrepo
- International Seafood Sustainability Foundation (ISSF), Pittsburgh, Pennsylvania, USA
| | - G Moreno
- International Seafood Sustainability Foundation (ISSF), Pittsburgh, Pennsylvania, USA
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Royer SJ, Corniuk RN, McWhirter A, Lynch HW, Pollock K, O'Brien K, Escalle L, Stevens KA, Moreno G, Lynch JM. Large floating abandoned, lost or discarded fishing gear (ALDFG) is frequent marine pollution in the Hawaiian Islands and Palmyra Atoll. MARINE POLLUTION BULLETIN 2023; 196:115585. [PMID: 37778244 DOI: 10.1016/j.marpolbul.2023.115585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 09/16/2023] [Accepted: 09/21/2023] [Indexed: 10/03/2023]
Abstract
Abandoned, lost, or discarded fishing gear (ALDFG) is a major source of marine debris with significant ecological and economic consequences. We documented the frequency, types, sizes, and impacts of ALDFG recovered from Hawai'i and Palmyra Atoll in the Central North Pacific Ocean (CNPO) from 2009 to 2021. A total of 253 events weighing 15 metric tons were recovered, including 120 drifting fish aggregating device (dFAD) components, 61 conglomerates, fewer distinct nets, lines, buoys, and unique gear. The Hawaiian Islands were dominated by conglomerates and Palmyra Atoll by dFADs. DFADs were connected to the Eastern Pacific tropical tuna purse seine fishery. Windward O'ahu experienced up to seven events or 1800 kg of ALDFG per month. Across Hawai', ALDFG was present on 55 % of survey days, including hotspots with 100 % occurrence. Coral reef damage, entangled wildlife, navigational and removal costs are reported. The data highlight the large magnitude of ALDFG and associated impacts in the CNPO.
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Affiliation(s)
- Sarah-Jeanne Royer
- Center for Marine Debris Research, Hawai'i Pacific University, Waimanalo, HI 96795, USA; The Ocean Cleanup, Rotterdam, the Netherlands.
| | - Raquel N Corniuk
- Center for Marine Debris Research, Hawai'i Pacific University, Waimanalo, HI 96795, USA
| | - Andrew McWhirter
- Center for Marine Debris Research, Hawai'i Pacific University, Waimanalo, HI 96795, USA
| | | | | | - Kevin O'Brien
- Papahānaumokuākea Marine Debris Project, Kailua, HI 96734, USA
| | - Lauriane Escalle
- Oceanic Fisheries Programme, The Pacific Community (SPC), Noumea, New Caledonia
| | - Katherine A Stevens
- Center for Marine Debris Research, Hawai'i Pacific University, Waimanalo, HI 96795, USA
| | - Gala Moreno
- International Seafood Sustainability Foundation (ISSF), Pittsburgh, PA, USA
| | - Jennifer M Lynch
- Center for Marine Debris Research, Hawai'i Pacific University, Waimanalo, HI 96795, USA; Chemical Sciences Division, National Institute of Standards and Technology, Waimanalo, HI 96795, USA.
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Stephan P, Gaertner D, Perez I, Guéry L. Multi‐species hotspots detection using self‐organizing maps: Simulation and application to purse seine tuna fisheries management. Methods Ecol Evol 2022. [DOI: 10.1111/2041-210x.14008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Pauline Stephan
- ETH Zurich, Environmental Systems Science Zurich Switzerland
- MARBEC, University of Montpellier, CNRS, Ifremer, IRD Sète France
- Institut de Recherche pour le Développement (IRD) Sète Cedex France
| | - Daniel Gaertner
- MARBEC, University of Montpellier, CNRS, Ifremer, IRD Sète France
- Institut de Recherche pour le Développement (IRD) Sète Cedex France
| | - Ilan Perez
- MARBEC, University of Montpellier, CNRS, Ifremer, IRD Sète France
- Institut de Recherche pour le Développement (IRD) Sète Cedex France
| | - Loreleï Guéry
- CIRAD, UMR PHIM Montpellier France
- PHIM, University of Montpellier, CIRAD, INRAE, Institut Agro, IRD Montpellier France
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van de Geer CH, Bourjea J, Broderick AC, Dalleau M, Fernandes RS, Harris LR, Inteca GE, Kiponda FK, Louro CMM, Mortimer JA, Msangameno D, Mwasi LD, Nel R, Okemwa GM, Olendo M, Pereira MAM, Rees AF, Silva I, Singh S, West L, Williams JL, Godley BJ. Marine turtles of the African east coast: current knowledge and priorities for conservation and research. ENDANGER SPECIES RES 2022. [DOI: 10.3354/esr01180] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Dulvy NK, Pacoureau N, Rigby CL, Pollom RA, Jabado RW, Ebert DA, Finucci B, Pollock CM, Cheok J, Derrick DH, Herman KB, Sherman CS, VanderWright WJ, Lawson JM, Walls RHL, Carlson JK, Charvet P, Bineesh KK, Fernando D, Ralph GM, Matsushiba JH, Hilton-Taylor C, Fordham SV, Simpfendorfer CA. Overfishing drives over one-third of all sharks and rays toward a global extinction crisis. Curr Biol 2021; 31:4773-4787.e8. [PMID: 34492229 DOI: 10.1016/j.cub.2021.08.062] [Citation(s) in RCA: 139] [Impact Index Per Article: 46.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 08/23/2021] [Accepted: 08/25/2021] [Indexed: 02/07/2023]
Abstract
The scale and drivers of marine biodiversity loss are being revealed by the International Union for Conservation of Nature (IUCN) Red List assessment process. We present the first global reassessment of 1,199 species in Class Chondrichthyes-sharks, rays, and chimeras. The first global assessment (in 2014) concluded that one-quarter (24%) of species were threatened. Now, 391 (32.6%) species are threatened with extinction. When this percentage of threat is applied to Data Deficient species, more than one-third (37.5%) of chondrichthyans are estimated to be threatened, with much of this change resulting from new information. Three species are Critically Endangered (Possibly Extinct), representing possibly the first global marine fish extinctions due to overfishing. Consequently, the chondrichthyan extinction rate is potentially 25 extinctions per million species years, comparable to that of terrestrial vertebrates. Overfishing is the universal threat affecting all 391 threatened species and is the sole threat for 67.3% of species and interacts with three other threats for the remaining third: loss and degradation of habitat (31.2% of threatened species), climate change (10.2%), and pollution (6.9%). Species are disproportionately threatened in tropical and subtropical coastal waters. Science-based limits on fishing, effective marine protected areas, and approaches that reduce or eliminate fishing mortality are urgently needed to minimize mortality of threatened species and ensure sustainable catch and trade of others. Immediate action is essential to prevent further extinctions and protect the potential for food security and ecosystem functions provided by this iconic lineage of predators.
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Affiliation(s)
- Nicholas K Dulvy
- Earth to Ocean Research Group, Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada.
| | - Nathan Pacoureau
- Earth to Ocean Research Group, Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada.
| | - Cassandra L Rigby
- College of Science and Engineering, James Cook University, Townsville, QLD 4811, Australia
| | - Riley A Pollom
- IUCN SSC Global Center for Species Survival, Indianapolis Zoo, 1200 West Washington Street, Indianapolis, IN 46222, USA
| | - Rima W Jabado
- College of Science and Engineering, James Cook University, Townsville, QLD 4811, Australia; Elasmo Project, PO Box 29588, Dubai, United Arab Emirates
| | - David A Ebert
- Pacific Shark Research Center, Moss Landing Marine Laboratories, 8272 Moss Landing Road, Moss Landing, CA 95039, USA; South African Institute for Aquatic Biodiversity, Grahamstown, Eastern Cape 6140, South Africa
| | - Brittany Finucci
- National Institute of Water and Atmospheric Research (NIWA), Wellington, New Zealand
| | - Caroline M Pollock
- IUCN, The David Attenborough Building, Pembroke Street, Cambridge, Cambridgeshire CB2 3QZ, UK
| | - Jessica Cheok
- Earth to Ocean Research Group, Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
| | - Danielle H Derrick
- Earth to Ocean Research Group, Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
| | | | - C Samantha Sherman
- Earth to Ocean Research Group, Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
| | - Wade J VanderWright
- Earth to Ocean Research Group, Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
| | - Julia M Lawson
- Bren School of Environmental Science & Management, 2400 Bren Hall, Santa Barbara, CA 93106-5131, USA
| | - Rachel H L Walls
- Earth to Ocean Research Group, Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
| | - John K Carlson
- National Marine Fisheries Service, Southeast Fisheries Science Center-Panama City Laboratory, 3500 Delwood Beach Road, Panama City, FL 32408, USA
| | - Patricia Charvet
- Programa de Pós-Graduação em Sistemática, Uso e Conservação da Biodiversidade, Universidade Federal do Ceará, Fortaleza, Ceará 60440-900, Brazil
| | - Kinattumkara K Bineesh
- Marine Biology Regional Centre, 130 Santhome High Road, Marine Biology Regional Centre, Tamil Nadu, Chennai, India
| | - Daniel Fernando
- Blue Resources Trust, 86 Barnes Place, Colombo 00700, Sri Lanka; Department of Biology and Environmental Science, Linnaeus University, SE 39182 Kalmar, Sweden
| | - Gina M Ralph
- International Union for Conservation of Nature Marine Biodiversity Unit, Department of Biological Sciences, Old Dominion University, Norfolk, VA 23529, USA
| | - Jay H Matsushiba
- Earth to Ocean Research Group, Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
| | - Craig Hilton-Taylor
- IUCN, The David Attenborough Building, Pembroke Street, Cambridge, Cambridgeshire CB2 3QZ, UK
| | - Sonja V Fordham
- Shark Advocates International c/o The Ocean Foundation, 1320 19th Street NW, Fifth Floor, Washington, DC 20036, USA
| | - Colin A Simpfendorfer
- College of Science and Engineering, James Cook University, Townsville, QLD 4811, Australia.
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