scholarly journals Direct and ancillary benefits of ecosystem based fisheries management in forage fish fisheries

2021 ◽  
Author(s):  
James N. Sanchirico ◽  
Timothy E. Essington
Keyword(s):  
Fisheries Management ◽  
Forage Fish ◽  
Ancillary Benefits ◽  
Ecosystem Based Fisheries Management

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 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.

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.

scholarly journals Steps to unlocking ecosystem based fisheries management: Towards displaying the N dimensional potato

2019 ◽  
Vol 209 ◽  
pp. 117-128 ◽  
Author(s):  
John G. Pope ◽  
Troels Jacob Hegland ◽  
Marta Ballesteros ◽  
Kåre Nolde Nielsen ◽  
Mika Rahikainen
Keyword(s):  
Fisheries Management ◽  
Ecosystem Based Fisheries Management

scholarly journals Ecosystem-based fisheries management requires a change to the selective fishing philosophy

2010 ◽  
Vol 107 (21) ◽  
pp. 9485-9489 ◽  
Author(s):  
S. Zhou ◽  
A. D. M. Smith ◽  
A. E. Punt ◽  
A. J. Richardson ◽  
M. Gibbs ◽  
...  
Keyword(s):  
Fisheries Management ◽  
Ecosystem Based Fisheries Management
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