scholarly journals Assessing trade-offs to inform ecosystem-based fisheries management of forage fish

2014 ◽  
Vol 4 (1) ◽  
Author(s):  
Andrew Olaf Shelton ◽  
Jameal F. Samhouri ◽  
Adrian C. Stier ◽  
Philip S. Levin
Keyword(s):  
Fisheries Management ◽  
Forage Fish ◽  
Trade Offs ◽  
Ecosystem Based Fisheries Management

scholarly journals Assessing Social – Ecological Trade-Offs to Advance Ecosystem-Based Fisheries Management

PLoS ONE ◽  
2014 ◽  
Vol 9 (9) ◽  
pp. e107811 ◽  
Author(s):  
Rudi Voss ◽  
Martin F. Quaas ◽  
Jörn O. Schmidt ◽  
Olli Tahvonen ◽  
Martin Lindegren ◽  
...  
Keyword(s):  
Fisheries Management ◽  
Social Ecological ◽  
Trade Offs ◽  
Ecosystem Based Fisheries Management

scholarly journals Pitfalls and guidelines for “recycling” models for ecosystem-based fisheries management: evaluating model suitability for forage fish fisheries

2013 ◽  
Vol 71 (1) ◽  
pp. 118-127 ◽  
Author(s):  
Timothy E. Essington ◽  
Éva E. Plagányi
Keyword(s):  
Functional Groups ◽  
Fisheries Management ◽  
Structural Model ◽  
Management Strategies ◽  
Model Development ◽  
Forage Fish ◽  
Ecological Processes ◽  
Predator Species ◽  
Key Functional Groups ◽  
Ecosystem Based Fisheries Management

Abstract Essington, T. E., and Plagányi, É. E. Pitfalls and guidelines for “recycling” models for ecosystem-based fisheries management. – ICES Journal of Marine Science, 71: . Ecosystem models have been developed for many marine systems to provide guidance on fisheries management strategies that protect key ecological functions. These models are commonly “recycled”, i.e. applied to new questions or policy concerns after the initial phase of model development, testing, and application. Because decisions about the model structure are typically based on the intended model use, it is important to recognize limits in the capacity of models to address questions for which they were not specifically designed. Here, we evaluate existing foodweb models in the context of their ability to identify key forage species in foodwebs and to test management strategies for fisheries that target them. We find that the depth and breadth with which predator species are represented are commonly insufficient for evaluating sensitivities of predator populations to forage fish depletion. We demonstrate that aggregating predator species into functional groups creates bias in foodweb metrics such as connectance. Models also varied considerably with respect to the extent that they have been tuned or fitted to retrospective patterns and the degree to which key sensitivities are identified. We use this case study to provide several general recommendations when “recycling” ecosystem and foodweb models. Briefly, we suggest as routine procedure careful scrutiny of structural model attributes, of scales at which ecological processes are included, and quality of fits for key functional groups.

Supporting Ecosystem-based Fisheries Management in meeting multiple objectives for sustainable use of coral reef ecosystems

2020 ◽  
Author(s):  
Mariska Weijerman ◽  
Zack S Oyafuso ◽  
Kirsten M Leong ◽  
Kirsten L L Oleson ◽  
Morgan Winston
Keyword(s):  
Coral Reef ◽  
Fisheries Management ◽  
Sustainable Use ◽  
Ecosystem Model ◽  
Ecological System ◽  
Management Approach ◽  
Social Ecological ◽  
Trade Offs ◽  
Coral Reef Ecosystems ◽  
Ecosystem Based Fisheries Management

Abstract Ecosystem-based Fisheries Management is a holistic management approach that integrates the dynamics of an entire ecosystem, including societal dimensions. However, this approach seldom lives up to its promise because economic and social objectives are rarely specified. To fill this gap, we explored how an ecosystem model could better integrate economic and social objectives, using the coral reef ecosystem around Hawai`i as a case study. After meeting with stakeholders and conducting a literature review of policy/strategy documents, we identified societal and ecological objectives and associated performance indicators for which data existed. We developed a social–ecological system conceptual framework to illustrate the relationships between ecological and social state components. This framework was the foundation for the development of the final social–ecological system model which we simulated using an Ecopath with Ecosim model. We simulated four gear/species restrictions for the reef-based fishery, two fishing scenarios associated with the opening of hypothetical no-take Marine Protected Areas for the deepwater-based fishery, and a Constant Effort (No Action) scenario. Despite limitations in the model, our approach shows that when social and economic objectives and social–ecological relationships are defined, we can quantify the trade-offs among the identified societal objectives to support managers in choosing among alternative interventions.

Case studies demonstrate capacity for a structured planning process for ecosystem-based fisheries management

2020 ◽  
Vol 77 (7) ◽  
pp. 1256-1274 ◽  
Author(s):  
Laura E. Koehn ◽  
Timothy E. Essington ◽  
Phillip S. Levin ◽  
Kristin N. Marshall ◽  
Lee G. Anderson ◽  
...  
Keyword(s):  
Decision Making ◽  
Case Studies ◽  
Fisheries Management ◽  
Planning Process ◽  
Management Strategies ◽  
Next Generation ◽  
Management Activity ◽  
Trade Offs ◽  
Multiple Regions ◽  
Ecosystem Based Fisheries Management

Structured, systematic processes for decision-making can facilitate implementation of ecosystem-based fisheries management (EBFM). In US fisheries management, existing fishery ecosystem plans (FEPs) are primarily descriptive documents — not action-oriented planning processes. “Next-generation” FEPs extend existing FEPs by translating ecosystem principles into action through a structured process, including identifying and prioritizing objectives and evaluating trade-offs while assessing alternative management strategies for meeting objectives. We illustrate the potential for implementing a structured decision-making process for EBFM by reviewing fisheries management case studies through the lens of the next-generation FEP process, highlighting two perspectives. First, across case studies almost all steps occur, many occurring in multiple regions, indicating scientific and fisheries management capacity exists to conduct structured process components. Second, adjustments would be needed to transition to next-generation FEPs, as existing activity is rarely conducted within a fully structured, integrated process and examples of certain steps are scarce, but existing examples can guide future management. Implementing ongoing activity within next-generation FEPs would likely streamline fisheries management activity, saving time and resources while improving outcomes for stakeholders and ecosystems.

Forage fish fisheries management requires a tailored approach to balance trade-offs

2018 ◽  
Vol 20 (1) ◽  
pp. 110-124 ◽  
Author(s):  
Margaret C. Siple ◽  
Timothy E. Essington ◽  
Éva E. Plagányi
Keyword(s):  
Fisheries Management ◽  
Forage Fish ◽  
Trade Offs ◽  
Tailored Approach ◽  
Balance Trade

scholarly journals The isotopic niche of Atlantic, biting marine mammals and its relationship to skull morphology and body size

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Massimiliano Drago ◽  
Marco Signaroli ◽  
Meica Valdivia ◽  
Enrique M. González ◽  
Asunción Borrell ◽  
...  
Keyword(s):  
Body Size ◽  
Atlantic Ocean ◽  
Fisheries Management ◽  
Marine Mammals ◽  
Trophic Position ◽  
Sympatric Species ◽  
Isotopic Niche ◽  
Apex Predators ◽  
Skull Morphology ◽  
Ecosystem Based Fisheries Management

AbstractUnderstanding the trophic niches of marine apex predators is necessary to understand interactions between species and to achieve sustainable, ecosystem-based fisheries management. Here, we review the stable carbon and nitrogen isotope ratios for biting marine mammals inhabiting the Atlantic Ocean to test the hypothesis that the relative position of each species within the isospace is rather invariant and that common and predictable patterns of resource partitioning exists because of constrains imposed by body size and skull morphology. Furthermore, we analyze in detail two species-rich communities to test the hypotheses that marine mammals are gape limited and that trophic position increases with gape size. The isotopic niches of species were highly consistent across regions and the topology of the community within the isospace was well conserved across the Atlantic Ocean. Furthermore, pinnipeds exhibited a much lower diversity of isotopic niches than odontocetes. Results also revealed body size as a poor predictor of the isotopic niche, a modest role of skull morphology in determining it, no evidence of gape limitation and little overlap in the isotopic niche of sympatric species. The overall evidence suggests limited trophic flexibility for most species and low ecological redundancy, which should be considered for ecosystem-based fisheries management.

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