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Falk-Andersson J, Rognerud I, De Frond H, Leone G, Karasik R, Diana Z, Dijkstra H, Ammendolia J, Eriksen M, Utz R, Walker TR, Fürst K. Cleaning Up without Messing Up: Maximizing the Benefits of Plastic Clean-Up Technologies through New Regulatory Approaches. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:13304-13312. [PMID: 37638638 PMCID: PMC10501118 DOI: 10.1021/acs.est.3c01885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Indexed: 08/29/2023]
Abstract
As the global plastics crisis grows, numerous technologies have been invented and implemented to recover plastic pollution from the environment. Although laudable, unregulated clean-up technologies may be inefficient and have unintended negative consequences on ecosystems, for example, through bycatch or removal of organic matter important for ecosystem functions. Despite these concerns, plastic clean-up technologies can play an important role in reducing litter in the environment. As the United Nations Environment Assembly is moving toward an international, legally binding treaty to address plastic pollution by 2024, the implementation of plastic clean-up technologies should be regulated to secure their net benefits and avoid unintended damages. Regulation can require environmental impact assessments and life cycle analysis to be conducted predeployment on a case-by-case basis to determine their effectiveness and impact and secure environmentally sound management. During operations catch-efficiency and bycatch of nonlitter items, as well as waste management of recovered litter, should be documented. Data collection for monitoring, research, and outreach to mitigate plastic pollution is recommended as added value of implementation of clean-up technologies.
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Affiliation(s)
| | - Idun Rognerud
- Norwegian Institute
for Water Research, Økernveien 94, 0579 Oslo, Norway
| | - Hannah De Frond
- University
of Toronto Trash Team, University of Toronto, Toronto, Ontario M5S 1A1, Canada
- Ocean Conservancy, Washington, D.C. 20036, United States
| | - Giulia Leone
- Ghent University, Research Group
Aquatic Ecology, Coupure
links 653, 9000, Ghent, Belgium
- Flanders
Marine Institute, (VLIZ), InnovOcean Site, Jacobsenstraat 1, 8400, Ostend, Belgium
- Research Institute for Nature and Forest, Aquatic Management, Havenlaan 88, 1000, Brussels, Belgium
- Research
Foundation − Flanders (FWO), Leuvenseweg 38, 1000, Brussels, Belgium
| | - Rachel Karasik
- Nicholas
Institute for Energy, Environment & Sustainability, Duke University, Durham, North Carolina 27708, United States
| | - Zoie Diana
- Division of Marine Science and Conservation, Nicholas School of the
Environment, Duke University Marine Laboratory, Duke University, Beaufort, North Carolina 27708, United States
- Integrated Toxicology
and Environmental Health, Nicholas School of the Environment, Duke University, Durham, North Carolina 27708, United States
| | - Hanna Dijkstra
- Institute for Environmental Studies, Vrije
Universiteit, De Boelelaan 1111, Amsterdam, Netherlands
| | - Justine Ammendolia
- School
for Resource and Environmental Studies, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada
- Faculty of Graduate Studies, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada
| | - Marcus Eriksen
- The 5 Gyres Institute, Los Angeles, California 90409, United States
| | - Ria Utz
- Sciences Po Paris, 27, rue Saint-Guillaume, 75007, Paris, France
- University of California, Berkeley, Berkeley, California 94720, United States
| | - Tony R. Walker
- School
for Resource and Environmental Studies, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada
| | - Kathinka Fürst
- Norwegian Institute
for Water Research, Økernveien 94, 0579 Oslo, Norway
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2
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Booth H, Ichsan M, Hermansyah RF, Rohmah LN, Naira KB, Adrianto L, Milner‐Gulland EJ. A socio‐psychological approach for understanding and managing bycatch in small‐scale fisheries. PEOPLE AND NATURE 2023. [DOI: 10.1002/pan3.10463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023] Open
Affiliation(s)
- Hollie Booth
- The Interdisciplinary Centre for Conservation Science (ICCS), Department of Zoology University of Oxford Oxford UK
- The Biodiversity Consultancy Cambridge UK
| | - Muhammad Ichsan
- University of Sunshine Coast Queensland Sippy Downs Australia
- Yayasan Impak Laut Biru Indonesia (Impact Blue Sea Foundation) Bogor Indonesia
| | - Rizky Fajar Hermansyah
- Faculty of Fisheries and Marine Sciences Bogor Agricultural University Bogor Indonesia
- Directorate‐General of Surveillance and Control of Marine and Fishery Resources Ministry of Marine Affairs and Fisheries of Indonesia Central Jakarta Indonesia
| | - Lailia Nur Rohmah
- Faculty of Fisheries and Marine Sciences Bogor Agricultural University Bogor Indonesia
- Directorate‐General of Surveillance and Control of Marine and Fishery Resources Ministry of Marine Affairs and Fisheries of Indonesia Central Jakarta Indonesia
| | - Kusuma Banda Naira
- Aceh Jaya Regency Marine Affairs and Fisheries Office Ministry of Marine Affairs and Fisheries of Indonesia Central Jakarta Indonesia
| | - Luky Adrianto
- Faculty of Fisheries and Marine Sciences Bogor Agricultural University Bogor Indonesia
| | - Eleanor Jane Milner‐Gulland
- The Interdisciplinary Centre for Conservation Science (ICCS), Department of Zoology University of Oxford Oxford UK
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3
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Erguden D, Kabasakal H, Ayas D. Fisheries bycatch and conservation priorities of young sharks (Chondrichthyes: Elasmobranchii) in the Eastern Mediterranean. ZOOLOGY IN THE MIDDLE EAST 2022. [DOI: 10.1080/09397140.2022.2051916] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Deniz Erguden
- Marine Sciences Department, Marine Sciences and Technology Faculty, İskenderun Technical University, İskenderun, Hatay, Turkey
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4
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Booth H, Arlidge WNS, Squires D, Milner-Gulland EJ. Bycatch levies could reconcile trade-offs between blue growth and biodiversity conservation. Nat Ecol Evol 2021; 5:715-725. [PMID: 33972736 DOI: 10.1038/s41559-021-01444-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Accepted: 03/14/2021] [Indexed: 02/03/2023]
Abstract
Economic activities in the ocean (that is, the 'blue economy') provide value to society, yet also jeopardize marine ecosystems. For example, fisheries are an essential source of income and food security for billions of people, yet bycatch poses a major threat to marine biodiversity, creating trade-offs between economic growth and biodiversity conservation. This Perspective explores bycatch levies as a market-based instrument for reconciling these trade-offs. We outline the theory and practice of bycatch levies to demonstrate how they could incentivize bycatch prevention and raise revenue for compensatory conservation, provided they are well designed, as part of a policy mix for sustainable and equitable ocean governance. We then explore ways forward for mainstreaming bycatch levies into the blue economy. While compensatory bycatch mitigation has been controversial, increasing adoption of net outcome approaches to biodiversity conservation suggests they could become mainstreamed within the next decade. Bycatch levies could raise billions of dollars towards closing global biodiversity financing gaps, delivering net outcomes for biodiversity under the United Nations Post-2020 Global Biodiversity Framework while enabling blue growth, and moving towards win-wins for economic welfare and biodiversity conservation.
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Affiliation(s)
- Hollie Booth
- The Interdisciplinary Centre for Conservation Science (ICCS), Department of Zoology, University of Oxford, Oxford, UK. .,Wildlife Conservation Society, New York City, NY, USA.
| | - William N S Arlidge
- The Interdisciplinary Centre for Conservation Science (ICCS), Department of Zoology, University of Oxford, Oxford, UK.,Faculty of Life Sciences, Albrecht Daniel Thaer Institute of Agricultural and Horticultural Sciences, Humboldt-Universität zu Berlin, Berlin, Germany.,Department of Biology and Ecology of Fishes, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany
| | - Dale Squires
- Department of Economics, University of California San Diego, San Diego, CA, USA.,Southwest Fisheries Science Centre, National Oceanic and Atmospheric Administration, San Diego, CA, USA
| | - E J Milner-Gulland
- The Interdisciplinary Centre for Conservation Science (ICCS), Department of Zoology, University of Oxford, Oxford, UK
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5
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Iwane MA, Leong KM, Vaughan M, Oleson KLL. When a Shark Is More Than a Shark: A Sociopolitical Problem-Solving Approach to Fisher-Shark Interactions. FRONTIERS IN CONSERVATION SCIENCE 2021. [DOI: 10.3389/fcosc.2021.669105] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Fisheries are often conceptualized through a biophysical lens resulting in management approaches that fail to account for stakeholder conflicts and sociopolitical inequities. Using a fisher engagement approach, this case study examines the sociopolitical dimensions of fisher-shark interactions in pursuit of more complete problem definitions and effective solutions. Through interviews with Hawai‘i small boat fishers and observations of a community-based shark-tagging project, we examined fisher perspective, socioeconomic landscapes, stakeholder relationships, and power dynamics. We interpreted these data using an adapted framework that mobilizes concepts from conflict theory and problem definition. We discovered that economic cost, sharks as fishing competitors, and factors of fishers' on-the-water decisions define the fisher-shark interaction problem at the dispute level. Deeper conflicts include fishers' poor perceptions of management legitimacy, degraded relationships with researchers and managers, threatened fisher identities, and poor enforcement capacity. Together, dispute and deeper conflicts limit the effectiveness of singular approaches (e.g., regulation) to mitigate fisher-shark interactions and necessitate multi-pronged solutions with substance-, process-, and relationships-based components. This case study documented one such multi-pronged strategy employing fisher-researcher knowledge exchange, collaborative research, and means of more transparent communication. This strategy has the potential to affect both dispute- and deeper-level outcomes by advancing collective understanding of sharks and shark-handling tools, fisher behavior, and reducing shark mortality. Thus, a sociopolitical approach to problem-solving may yield greater collective benefits to fisheries stakeholders and sharks, with broader implications for the systemic management of complex human and biophysical ecosystem components.
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Cooke SJ, Venturelli P, Twardek WM, Lennox RJ, Brownscombe JW, Skov C, Hyder K, Suski CD, Diggles BK, Arlinghaus R, Danylchuk AJ. Technological innovations in the recreational fishing sector: implications for fisheries management and policy. REVIEWS IN FISH BIOLOGY AND FISHERIES 2021. [PMID: 33642705 DOI: 10.1007/s1160-021-09643-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Technology that is developed for or adopted by the recreational fisheries sector (e.g., anglers and the recreational fishing industry) has led to rapid and dramatic changes in how recreational anglers interact with fisheries resources. From improvements in finding and catching fish to emulating their natural prey and accessing previously inaccessible waters, to anglers sharing their exploits with others, technology is completely changing all aspects of recreational fishing. These innovations would superficially be viewed as positive from the perspective of the angler (aside from the financial cost of purchasing some technologies), yet for the fisheries manager and policy maker, technology may create unintended challenges that lead to reactionary or even ill-defined approaches as they attempt to keep up with these changes. The goal of this paper is to consider how innovations in recreational fishing are changing the way that anglers interact with fish, and thus how recreational fisheries management is undertaken. We use a combination of structured reviews and expert analyses combined with descriptive case studies to highlight the many ways that technology is influencing recreational fishing practice, and, relatedly, what it means for changing how fisheries and/or these technologies need to be managed-from changes in fish capture, to fish handling, to how anglers share information with each other and with managers. Given that technology is continually evolving, we hope that the examples provided here lead to more and better monitoring of technological innovations and engagement by the management and policy authorities with the recreational fishing sector. Doing so will ensure that management actions related to emerging and evolving recreational fishing technology are more proactive than reactive.
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Affiliation(s)
- Steven J Cooke
- Fish Ecology and Conservation Physiology Laboratory, Department of Biology and Institute of Environmental and Interdisciplinary Science, Carleton University, 1125 Colonel By Dr., Ottawa, ON K1S 5B6 Canada
| | - Paul Venturelli
- Department of Biology, Ball State University, Cooper Life Science Building, CL 121, Muncie, IN 47306 USA
| | - William M Twardek
- Fish Ecology and Conservation Physiology Laboratory, Department of Biology and Institute of Environmental and Interdisciplinary Science, Carleton University, 1125 Colonel By Dr., Ottawa, ON K1S 5B6 Canada
| | - Robert J Lennox
- LFI, Freshwater Biology, NORCE Norwegian Research Centre, Nygårdsporten 112, 5006 Bergen, Norway
| | - Jacob W Brownscombe
- Fish Ecology and Conservation Physiology Laboratory, Department of Biology and Institute of Environmental and Interdisciplinary Science, Carleton University, 1125 Colonel By Dr., Ottawa, ON K1S 5B6 Canada
- Great Lakes Laboratory for Fisheries and Aquatic Sciences, Fisheries and Oceans Canada, 867 Lakeshore Rd, Burlington, ON L7S 1A1 Canada
| | - Christian Skov
- Technical University of Denmark, National Institute of Aquatic Resources (DTU Aqua), Vejlsøvej 39, 8600 Silkeborg, Denmark
| | - Kieran Hyder
- Centre for Environment, Fisheries and Aquaculture Science (CEFAS), Pakefield Road, Lowestoft, Suffolk, NR33 0HT UK
| | - Cory D Suski
- Department of Natural Resources and Environmental Sciences, University of Illinois at Urbana-Champaign, 1102 S. Goodwin Ave, Urbana, IL 61801 USA
| | | | - Robert Arlinghaus
- Department of Biology and Ecology of Fishes, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Müggelseedamm 310, 12587 Berlin, Germany
- Division of Integrative Fisheries Management, Humboldt-Universität zu Berlin, Invalidenstrasse 42, 10115 Berlin, Germany
| | - Andy J Danylchuk
- Department of Environmental Conservation, University of Massachusetts Amherst, 160 Holdsworth Way, Amherst, MA 01003 USA
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7
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Cooke SJ, Venturelli P, Twardek WM, Lennox RJ, Brownscombe JW, Skov C, Hyder K, Suski CD, Diggles BK, Arlinghaus R, Danylchuk AJ. Technological innovations in the recreational fishing sector: implications for fisheries management and policy. REVIEWS IN FISH BIOLOGY AND FISHERIES 2021; 31:253-288. [PMID: 33642705 PMCID: PMC7900803 DOI: 10.1007/s11160-021-09643-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Accepted: 02/02/2021] [Indexed: 05/13/2023]
Abstract
Technology that is developed for or adopted by the recreational fisheries sector (e.g., anglers and the recreational fishing industry) has led to rapid and dramatic changes in how recreational anglers interact with fisheries resources. From improvements in finding and catching fish to emulating their natural prey and accessing previously inaccessible waters, to anglers sharing their exploits with others, technology is completely changing all aspects of recreational fishing. These innovations would superficially be viewed as positive from the perspective of the angler (aside from the financial cost of purchasing some technologies), yet for the fisheries manager and policy maker, technology may create unintended challenges that lead to reactionary or even ill-defined approaches as they attempt to keep up with these changes. The goal of this paper is to consider how innovations in recreational fishing are changing the way that anglers interact with fish, and thus how recreational fisheries management is undertaken. We use a combination of structured reviews and expert analyses combined with descriptive case studies to highlight the many ways that technology is influencing recreational fishing practice, and, relatedly, what it means for changing how fisheries and/or these technologies need to be managed-from changes in fish capture, to fish handling, to how anglers share information with each other and with managers. Given that technology is continually evolving, we hope that the examples provided here lead to more and better monitoring of technological innovations and engagement by the management and policy authorities with the recreational fishing sector. Doing so will ensure that management actions related to emerging and evolving recreational fishing technology are more proactive than reactive.
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Affiliation(s)
- Steven J. Cooke
- Fish Ecology and Conservation Physiology Laboratory, Department of Biology and Institute of Environmental and Interdisciplinary Science, Carleton University, 1125 Colonel By Dr., Ottawa, ON K1S 5B6 Canada
| | - Paul Venturelli
- Department of Biology, Ball State University, Cooper Life Science Building, CL 121, Muncie, IN 47306 USA
| | - William M. Twardek
- Fish Ecology and Conservation Physiology Laboratory, Department of Biology and Institute of Environmental and Interdisciplinary Science, Carleton University, 1125 Colonel By Dr., Ottawa, ON K1S 5B6 Canada
| | - Robert J. Lennox
- LFI, Freshwater Biology, NORCE Norwegian Research Centre, Nygårdsporten 112, 5006 Bergen, Norway
| | - Jacob W. Brownscombe
- Fish Ecology and Conservation Physiology Laboratory, Department of Biology and Institute of Environmental and Interdisciplinary Science, Carleton University, 1125 Colonel By Dr., Ottawa, ON K1S 5B6 Canada
- Great Lakes Laboratory for Fisheries and Aquatic Sciences, Fisheries and Oceans Canada, 867 Lakeshore Rd, Burlington, ON L7S 1A1 Canada
| | - Christian Skov
- Technical University of Denmark, National Institute of Aquatic Resources (DTU Aqua), Vejlsøvej 39, 8600 Silkeborg, Denmark
| | - Kieran Hyder
- Centre for Environment, Fisheries and Aquaculture Science (CEFAS), Pakefield Road, Lowestoft, Suffolk, NR33 0HT UK
| | - Cory D. Suski
- Department of Natural Resources and Environmental Sciences, University of Illinois at Urbana-Champaign, 1102 S. Goodwin Ave, Urbana, IL 61801 USA
| | | | - Robert Arlinghaus
- Department of Biology and Ecology of Fishes, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Müggelseedamm 310, 12587 Berlin, Germany
- Division of Integrative Fisheries Management, Humboldt-Universität zu Berlin, Invalidenstrasse 42, 10115 Berlin, Germany
| | - Andy J. Danylchuk
- Department of Environmental Conservation, University of Massachusetts Amherst, 160 Holdsworth Way, Amherst, MA 01003 USA
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8
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Swimmer Y, Zollett EA, Gutierrez A. Bycatch mitigation of protected and threatened species in tuna purse seine and longline fisheries. ENDANGER SPECIES RES 2020. [DOI: 10.3354/esr01069] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Bycatch and mortality in fishing gear poses a conservation threat worldwide to many marine species. Resource managers and conservation scientists face challenges in identifying bycatch mitigation solutions that work for multiple taxa while maintaining acceptable levels of target fish catch. The most successful mitigation measures to address bycatch concerns are those that (1) minimize bycatch with limited or no impact on target species catch, (2) have been proven through at-sea experimental research, (3) are practical, affordable, and easy to use, and (4) do not risk the safety of the fishing vessel crew or the bycaught animals. We conducted a review of mitigation measures in fishing gears that target tuna and tuna-like species and that either prevent capture of non-target species in fishing gear or facilitate alive post-capture release, and evaluated these against 4 defined criteria: effective, proven, practical, and safe. This paper outlines the most effective bycatch mitigation measures, as based upon the best scientific information available, in commercial and artisanal pelagic longline and purse seine fisheries, specifically those that target tuna and tuna-like species. This review includes information on gear and operational changes to fishing practices that reduce bycatch for protected and threatened species across taxonomic groups, with a focus on cetaceans, sea turtles, seabirds, sharks, and istiophorid billfishes. The information provided can guide future research and management efforts in Regional Fisheries Management Organizations that are specific to tuna fishing and that aim to minimize impacts to protected and threatened species while maintaining viable commercial fisheries.
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Affiliation(s)
- Y Swimmer
- NOAA Fisheries, Pacific Islands Fisheries Science Center, Honolulu, Hawaii 96818, USA
| | - EA Zollett
- Environmental Leadership Incubator, University of California, Santa Barbara, California 93106, USA
| | - A Gutierrez
- NOAA Fisheries, Office of Protected Resources, Silver Spring, Maryland 20910, USA
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9
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Falk-Andersson J, Larsen Haarr M, Havas V. Basic principles for development and implementation of plastic clean-up technologies: What can we learn from fisheries management? THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 745:141117. [PMID: 32736112 DOI: 10.1016/j.scitotenv.2020.141117] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 07/17/2020] [Accepted: 07/18/2020] [Indexed: 06/11/2023]
Abstract
Plastic pollution compromises ocean health, with large amounts of plastics continuing to enter marine and coastal environments. Various mitigative engineering solutions are being developed and implemented in response to this threat. While recognising the positive impacts of clean-ups, we highlight two perspectives given little attention to date, which are vital to evaluating the cost-benefit ratio of clean-ups: firstly, clean-up efficiency where density and accessibility of litter are key, and secondly, potential negative externalities that implementation of clean-up technologies may have. These principles, catch per unit effort and the impact on non-target species, are well known from fisheries management. We argue they should also be applied in evaluating marine litter removal schemes.
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Affiliation(s)
| | | | - Vilma Havas
- SALT Lofoten AS, Havneterminalen, Fiskergata 23, 8301 Svolvær, Norway.
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10
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Avery JD, Aagaard K, Burkhalter J, Robinson OJ. Seabird longline bycatch reduction devices increase target catch while reducing bycatch: A meta-analysis. J Nat Conserv 2017. [DOI: 10.1016/j.jnc.2017.05.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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11
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Barletta M, Lima ARA, Dantas DV, Oliveira IM, Neto JR, Fernandes CAF, Farias EGG, Filho JLR, Costa MF. How Can Accurate Landing Stats Help in Designing Better Fisheries and Environmental Management for Western Atlantic Estuaries? COASTAL WETLANDS: ALTERATION AND REMEDIATION 2017. [DOI: 10.1007/978-3-319-56179-0_20] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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12
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Peckham SH, Lucero-Romero J, Maldonado-Díaz D, Rodríguez-Sánchez A, Senko J, Wojakowski M, Gaos A. Buoyless Nets Reduce Sea Turtle Bycatch in Coastal Net Fisheries. Conserv Lett 2015. [DOI: 10.1111/conl.12176] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Affiliation(s)
- S. Hoyt Peckham
- Center for Ocean Solutions; Stanford University; Pacific Grove CA USA
| | - Jesus Lucero-Romero
- Grupo Tortuguero de las Californias; A.C; La Paz, Baja California Sur México
| | | | | | - Jesse Senko
- School of Life Sciences; Arizona State University; Tempe AZ USA
| | | | - Alexander Gaos
- Eastern Pacific Hawksbill Initiative; San Diego CA USA
- San Diego State University; San Diego CA USA
- University of California Davis; Davis CA USA
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13
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Cairns NA, Stoot LJ, Blouin-Demers G, Cooke SJ. Refinement of bycatch reduction devices to exclude freshwater turtles from commercial fishing nets. ENDANGER SPECIES RES 2013. [DOI: 10.3354/esr00549] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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14
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Nguyen VM, Larocque SM, Stoot LJ, Cairns NA, Blouin-Demers G, Cooke SJ. Perspectives of fishers on turtle bycatch and conservation strategies in a small-scale inland commercial fyke net fishery. ENDANGER SPECIES RES 2013. [DOI: 10.3354/esr00530] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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15
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Kraan M, Uhlmann S, Steenbergen J, Van Helmond ATM, Van Hoof L. The optimal process of self-sampling in fisheries: lessons learned in the Netherlands. JOURNAL OF FISH BIOLOGY 2013; 83:963-973. [PMID: 24090557 DOI: 10.1111/jfb.12192] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
At-sea sampling of commercial fishery catches by observers is a relatively expensive exercise. The fact that an observer has to stay on-board for the duration of the trip results in clustered samples and effectively small sample sizes, whereas the aim is to make inferences regarding several trips from an entire fleet. From this perspective, sampling by fishermen themselves (self-sampling) is an attractive alternative, because a larger number of trips can be sampled at lower cost. Self-sampling should not be used too casually, however, as there are often issues of data-acceptance related to it. This article shows that these issues are not easily dealt with in a statistical manner. Improvements might be made if self-sampling is understood as a form of cooperative research. Cooperative research has a number of dilemmas and benefits associated with it. This article suggests that if the guidelines for cooperative research are taken into account, the benefits are more likely to materialize. Secondly, acknowledging the dilemmas, and consciously dealing with them might lay the basis to trust-building, which is an essential element in the acceptance of data derived from self-sampling programmes.
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Affiliation(s)
- M Kraan
- IMARES, Haringkade 1, 1976, CP IJmuiden, the Netherlands
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16
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Senko J, White ER, Heppell SS, Gerber LR. Comparing bycatch mitigation strategies for vulnerable marine megafauna. Anim Conserv 2013. [DOI: 10.1111/acv.12051] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- J. Senko
- School of Life Sciences; Arizona State University; Tempe AZ USA
| | - E. R. White
- School of Life Sciences; Arizona State University; Tempe AZ USA
| | - S. S. Heppell
- Department of Fisheries and Wildlife; Oregon State University; Corvallis OR USA
| | - L. R. Gerber
- School of Life Sciences; Arizona State University; Tempe AZ USA
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Abstract
AbstractThere is growing awareness that small-scale fisheries may have large impacts on threatened marine fauna. Bycatch of small cetaceans by the Peruvian small-scale driftnet fleet results in the deaths of thousands of animals annually. We sought to assess the effectiveness of acoustic alarms (pingers) for reducing the incidental capture of dolphins and porpoises by this fleet. Forty-three experimental trips (156 fishing sets) and 47 control trips (195 fishing sets) out of Salaverry Port, northern Peru, were observed from April 2009 to August 2011. Twenty-two percent of control sets captured small cetaceans (67 individuals) and 16% of experimental sets had captures of small cetaceans (33 individuals). The bycatch rate of experimental sets was 0.50 individuals km−2h−1, whereas for control sets the rate was 0.80 individuals km−2h−1. This 37% reduction in bycatch rate suggests that pingers may be effective in reducing the bycatch of small cetaceans in this fishery. Catch rates of the fishery's target shark and ray species were unchanged. Given the vast size of this fishery and its current levels of bycatch of small cetaceans (> 10,000 individuals annually), even the modest declines in bycatch we observed could result in reductions in mortality of hundreds or thousands of small cetaceans per annum. Challenges, including increased costs, to large-scale utilization of pingers have yet to be overcome. The harpooning of dolphins for use as bait will also need to be addressed for further reductions in dolphin and porpoise bycatch and mortality to be achievable.
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Hilborn R, Stewart IJ, Branch TA, Jensen OP. Defining trade-offs among conservation, profitability, and food security in the California current bottom-trawl fishery. CONSERVATION BIOLOGY : THE JOURNAL OF THE SOCIETY FOR CONSERVATION BIOLOGY 2012; 26:257-266. [PMID: 22443131 DOI: 10.1111/j.1523-1739.2011.01800.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Although it is recognized that marine wild-capture fisheries are an important source of food for much of the world, the cost of sustainable capture fisheries to species diversity is uncertain, and it is often questioned whether industrial fisheries can be managed sustainably. We evaluated the trade-off among sustainable food production, profitability, and conservation objectives in the groundfish bottom-trawl fishery off the U.S. West Coast, where depletion (i.e., reduction in abundance) of six rockfish species (Sebastes) is of particular concern. Trade-offs are inherent in this multispecies fishery because there is limited capacity to target species individually. From population models and catch of 34 stocks of bottom fish, we calculated the relation between harvest rate, long-term yield (i.e., total weight of fish caught), profit, and depletion of each species. In our models, annual ecosystem-wide yield from all 34 stocks was maximized with an overall 5.4% harvest rate, but profit was maximized at a 2.8% harvest rate. When we reduced harvest rates to the level (2.2% harvest rate) at which no stocks collapsed (<10% of unfished levels), biomass harvested was 76% of the maximum sustainable yield and profit 89% of maximum. A harvest rate under which no stocks fell below the biomass that produced maximum sustainable yield (1% harvest rate), resulted in 45% of potential yield and 67% of potential profit. Major reductions in catch in the late 1990s led to increase in the biomass of the most depleted stocks, but this rebuilding resulted in the loss of >30% of total sustainable yield, whereas yield lost from stock depletion was 3% of total sustainable yield. There are clear conservation benefits to lower harvest rates, but avoiding overfishing of all stocks in a multispecies fishery carries a substantial cost in terms of lost yield and profit.
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Affiliation(s)
- Ray Hilborn
- School of Aquatic and Fishery Sciences, Box 355020 University of Washington, Seattle, WA 98195, USA.
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A Comparison of the Biochemical Characteristics of Different Anatomical Regions of Chub (Scomber japonicus) and Blue Mackerel (Scomber australasicus) Muscles. ACTA ACUST UNITED AC 2010. [DOI: 10.5657/kfas.2010.43.1.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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