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  • 1
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    Comment on "Impacts of biodiversity loss on ocean ecosystem services" (2007)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2007-06-02
    Description: Worm et al. (Research Articles, 3 November 2006, p. 787) investigated the importance of biodiversity to marine ecosystem services across temporal and spatial scales. In projecting the extent of future fisheries collapse, we argue that the authors inappropriately extrapolated beyond their available observations and used data on marine reserves and fishery closures that are not representative of global fisheries.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Holker, Franz -- Beare, Doug -- Dorner, Hendrik -- di Natale, Antonio -- Ratz, Hans-Joachim -- Temming, Axel -- Casey, John -- New York, N.Y. -- Science. 2007 Jun 1;316(5829):1285; author reply 1285.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉European Commission, Directorate General Joint Research Centre, Institute for the Protection and Security of the Citizen, Agriculture and Fisheries Unit, TP 051, 21020, Italy. franz.hoelker@jrc.it〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17540886" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biodiversity ; Conservation of Natural Resources ; *Ecosystem ; *Fisheries ; *Fishes ; Forecasting ; Oceans and Seas ; Population Dynamics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    An alternative reference point in the context of ecosystem-based fisheries management: maximum sustainable dead biomass (2015)
    Oxford University Press
    Details
    Publication Date: 2015-10-22
    Description: Under the 2013 Reform of the European Union's Common Fisheries Policy (CFP), fisheries management aims to ensure that, within a reasonable time frame, the exploitation of marine biological resources restores and maintains populations of harvested stocks above levels that can produce the maximum sustainable yield ( MSY ). The CFP also calls for the implementation of an ecosystem-based approach to fisheries management (EBFM). In this paper, we present the concept of maximum sustainable dead biomass ( MSDB ) and its associated management reference points for fishing mortality and spawning-stock biomass as alternatives to those associated with MSY . The concept of MSDB is illustrated by a dynamic pool production model of a virtual fish stock which takes into account variations in natural mortality ( M ), fishing mortality ( F ), and exploitation pattern. Our approach implies a compensatory mechanism whereby survivors may benefit from compensatory density dependence and is implemented through progressive substitution of M with F for varying rates of total mortality ( Z ). We demonstrate that the reference points for fishing mortality and spawning-stock biomass associated with MSDB are less sensitive to increasing compensation of M with F than those associated with MSY and more sensitive to changes in selection pattern. MSDB -based reference points, which are consistent with maximum stock productivity, are also associated with lower fishing mortality rates and higher stock biomasses than their MSY -based counterparts. Given that selection pattern can be influenced through fishery input measures (e.g. technical gear measures, decisions on areas, and/or times of fishing), whereas variations of M in response to F are not controllable (indeed poorly understood), that the results of many fish stock assessments are imprecise, that maximum stock productivity corresponds to MSDB and that MSY -based reference points may best be considered as limits, we propose that MSDB -based reference points provide a more appropriate basis for management under an EBFM.
    Print ISSN: 1054-3139
    Electronic ISSN: 1095-9289
    Topics: Biology , Geosciences , Physics
    Published by Oxford University Press
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