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  • 1
    Online Resource
    Online Resource
    Introduction
    Elsevier BV ; 2015
    In:  Fisheries Research Vol. 171 ( 2015-11), p. 1-3
    Details
    In: Fisheries Research, Elsevier BV, Vol. 171 ( 2015-11), p. 1-3
    Type of Medium: Online Resource
    ISSN: 0165-7836
    URL: Article
    DOI: 10.1016/j.fishres.2015.08.008
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2015
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    detail.hit.zdb_id: 1497860-X
    SSG: 21,3
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  • 2
    Online Resource
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    Lessons learned from stock collapse and recovery of North Sea herring: a review
    Oxford University Press (OUP) ; 2010
    In:  ICES Journal of Marine Science Vol. 67, No. 9 ( 2010-12-01), p. 1875-1886
    Details
    In: ICES Journal of Marine Science, Oxford University Press (OUP), Vol. 67, No. 9 ( 2010-12-01), p. 1875-1886
    Abstract: Dickey-Collas, M., Nash, R. D. M., Brunel, T., van Damme, C. J. G., Marshall, C. T., Payne, M. R., Corten, A., Geffen, A. J., Peck, M. A., Hatfield, E. M. C., Hintzen, N. T., Enberg, K., Kell, L. T., and Simmonds, E. J. 2010. Lessons learned from stock collapse and recovery of North Sea herring: a review. – ICES Journal of Marine Science, 67: 1875–1886. The collapse and recovery of North Sea herring in the latter half of the 20th century had both ecological and economic consequences. We review the effect of the collapse and investigate whether the increased understanding about the biology, ecology, and stock dynamics gained in the past three decades can aid management to prevent further collapses and improve projections of recovery. Recruitment adds the most uncertainty to estimates of future yield and the potential to reach biomass reference points within a specified time-frame. Stock–recruitment relationships must be viewed as being fluid and dependent on ecosystem change. Likewise, predation mortality changes over time. Management aimed at maximum sustainable yield (MSY) fishing mortality targets implies interannual variation in TACs, and variability in supply is therefore unavoidable. Harvest control rules, when adhered to, aid management greatly. We advocate that well-founded science can substantially contribute to management through improved confidence and increased transparency. At present, we cannot predict the effects of collapse or recovery of a single stock on the ecosystem as a whole. Moreover, as managers try to reconcile commitments to single-species MSY targets with the ecosystem-based approach, they must consider the appropriate management objectives for the North Sea ecosystem as a whole.
    Type of Medium: Online Resource
    ISSN: 1095-9289 , 1054-3139
    URL: Article
    DOI: 10.1093/icesjms/fsq033
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2010
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    detail.hit.zdb_id: 1468003-8
    detail.hit.zdb_id: 29056-7
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    SSG: 21,3
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  • 3
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    Purported flaws in management strategy evaluation: basic problems or misinterpretations?
    Oxford University Press (OUP) ; 2010
    In:  ICES Journal of Marine Science Vol. 67, No. 3 ( 2010-04-01), p. 567-574
    Details
    In: ICES Journal of Marine Science, Oxford University Press (OUP), Vol. 67, No. 3 ( 2010-04-01), p. 567-574
    Abstract: Butterworth, D. S., Bentley, N., De Oliveira, J. A. A., Donovan, G. P., Kell, L. T., Parma, A. M., Punt, A. E., Sainsbury, K. J., Smith, A. D. M., and Stokes, T. K. 2010. Purported flaws in management strategy evaluation: basic problems or misinterpretations? – ICES Journal of Marine Science, 67: 567–574. Rochet and Rice, while recognizing management strategy evaluation (MSE) as an important step forward in fisheries management, level a number of criticisms at its implementation. Some of their points are sound, such as the need for care in representing uncertainties and for thorough documentation of the process. However, others evidence important misunderstandings. Although the difficulties in estimating tail probabilities and risks, as discussed by Rochet and Rice, are well known, their arguments that Efron's non-parametric bootstrap re-sampling method underestimates the probabilities of low values are flawed. In any case, though, the focus of MSEs is primarily on comparing performance and robustness across alternative management procedures (MPs), rather than on estimating absolute levels of risk. Qualitative methods can augment MSE, but their limitations also need to be recognized. Intelligence certainly needs to play a role in fisheries management, but not at the level of tinkering in the provision of annual advice, which Rochet and Rice apparently advocate, inter alia because this runs the risk of advice following noise rather than signal. Instead, intelligence should come into play in the exercise of oversight through the process of multiannual reviews of MSE and associated MPs. A number of examples are given of the process of interaction with stakeholders which should characterize MSE.
    Type of Medium: Online Resource
    ISSN: 1095-9289 , 1054-3139
    URL: Article
    DOI: 10.1093/icesjms/fsq009
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2010
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    detail.hit.zdb_id: 1468003-8
    detail.hit.zdb_id: 29056-7
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  • 4
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    Lumpers or splitters? Evaluating recovery and management plans for metapopulations of herring
    Oxford University Press (OUP) ; 2009
    In:  ICES Journal of Marine Science Vol. 66, No. 8 ( 2009-09-01), p. 1776-1783
    Details
    In: ICES Journal of Marine Science, Oxford University Press (OUP), Vol. 66, No. 8 ( 2009-09-01), p. 1776-1783
    Abstract: Kell, L. T., Dickey-Collas, M., Hintzen, N. T., Nash, R. D. M., Pilling, G. M., and Roel, B. A. 2009. Lumpers or splitters? Evaluating recovery and management plans for metapopulations of herring. – ICES Journal of Marine Science, 66: 1776–1783. The long-term management of a stock representing a metapopulation has been simulated in a case study loosely based upon herring to the west of the British isles, where stocks are currently assessed and managed by management area, although there is evidence of mixing between stocks (in terms of connectivity, migrations, and exploitation). The simulations evaluate scientific advice (based on virtual population analysis, VPA) and the sustainability of fishing under two population-structure scenarios, corresponding either to discrete stocks, which only mix on the feeding grounds, or where diffusion between stocks takes place. The ability of stock assessment to monitor stock status and exploitation levels was evaluated for defining stocks based on fishing areas and for stocks that combined fishing areas. The study showed that assessment based on VPA of the metapopulation could fail to detect overexploitation of stocks and fail to detect and distinguish between the effects of exploitation and regime shifts.
    Type of Medium: Online Resource
    ISSN: 1095-9289 , 1054-3139
    URL: Article
    DOI: 10.1093/icesjms/fsp181
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2009
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    detail.hit.zdb_id: 1468003-8
    detail.hit.zdb_id: 29056-7
    SSG: 12
    SSG: 21,3
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  • 5
    Online Resource
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    Consequences of variations in carrying capacity or migration for the perception of Atlantic bluefin tuna ( Thunnus thynnus ) population dynamics
    Canadian Science Publishing ; 2007
    In:  Canadian Journal of Fisheries and Aquatic Sciences Vol. 64, No. 5 ( 2007-05-01), p. 827-836
    Details
    In: Canadian Journal of Fisheries and Aquatic Sciences, Canadian Science Publishing, Vol. 64, No. 5 ( 2007-05-01), p. 827-836
    Abstract: Spectacular long-term cycles (around 110 years), independent of human exploitation, have been seen in historical catches of Atlantic bluefin tuna (Thunnus thynnus). Previous studies indicated that such variations could have been generated by contrasting but equally plausible dynamic processes, i.e., changes in carrying capacity or migration. A simulation framework was therefore used to test whether the International Commission for the Conservation of Atlantic Tuna stock assessment model, i.e., a virtual population analysis (VPA), can capture such dynamics. The main outcome is that knowledge of the underlying process is crucial, because distinct hypotheses lead to different population dynamics and contrasting performances of the stock assessment model. The VPA is indeed able to reconstruct accurately the historical stock parameters under the carrying-capacity hypothesis, but not under the migratory hypothesis, for which there is often strong bias (up to 500%) in absolute values and in trends of spawning stock biomass and F. Furthermore, it was shown that (i) different phases between exploitation and long-term cycle can induce contrasting terminal F for a same effort and (ii) that there was considerable confounding between the dynamics and increasing effort (as currently seen). We conclude that it is difficult to infer the actual dynamics on the basis of commercial catch data and that novel fishery-independent observation is needed.
    Type of Medium: Online Resource
    ISSN: 0706-652X , 1205-7533
    URL: Article
    DOI: 10.1139/f07-050
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2007
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    detail.hit.zdb_id: 1473089-3
    SSG: 21,3
    SSG: 12
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  • 6
    Online Resource
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    Dynamic prediction of effort reallocation in mixed fisheries
    Elsevier BV ; 2012
    In:  Fisheries Research Vol. 125-126 ( 2012-8), p. 243-253
    Details
    In: Fisheries Research, Elsevier BV, Vol. 125-126 ( 2012-8), p. 243-253
    Type of Medium: Online Resource
    ISSN: 0165-7836
    URL: Article
    DOI: 10.1016/j.fishres.2012.03.004
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2012
    detail.hit.zdb_id: 406532-3
    detail.hit.zdb_id: 1497860-X
    SSG: 21,3
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  • 7
    Online Resource
    Online Resource
    DataSheet_2.pdf
    Frontiers Media SA ; 2022
    In:  Frontiers in Marine Science Vol. 9 ( 2022-7-20)
    Details
    In: Frontiers in Marine Science, Frontiers Media SA, Vol. 9 ( 2022-7-20)
    Abstract: In data and capacity limited situations, catch-only models are increasingly being used to provide summaries of the state of regional and global fisheries. Due to the lack of information on stock trends, heuristics are required for initial and final depletion priors. The lack of data for calibration means that results are sensitive to the choice of heuristics. We, therefore, evaluate the value of obtaining additional information for classifying stock status. We found that heuristics alone performed nearly as well as the catch-only model. This highlights that catch-only models cannot be used as part of management control, where data updates are used to monitor the effectiveness of interventions. To implement management for data-poor stocks, additional data and knowledge are therefore required. The value of obtaining additional information for reducing risk due to loss of yield through adopting a risk equivalence approach should be evaluated. This will help identify the value-of-information and prioritise the development of scientific management frameworks that protect marine ecosystems and the well-being of people who have a stake in the resources at regional and local levels.
    Type of Medium: Online Resource
    ISSN: 2296-7745
    URL: Article
    URL: Article
    URL: Article
    DOI: 10.3389/fmars.2022.762203
    DOI: 10.3389/fmars.2022.762203.s001
    DOI: 10.3389/fmars.2022.762203.s002
    Language: Unknown
    Publisher: Frontiers Media SA
    Publication Date: 2022
    detail.hit.zdb_id: 2757748-X
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  • 8
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    Comparing performance of catch-based and length-based stock assessment methods in data-limited fisheries
    Canadian Science Publishing ; 2020
    In:  Canadian Journal of Fisheries and Aquatic Sciences Vol. 77, No. 6 ( 2020-06), p. 1026-1037
    Details
    In: Canadian Journal of Fisheries and Aquatic Sciences, Canadian Science Publishing, Vol. 77, No. 6 ( 2020-06), p. 1026-1037
    Abstract: The quantity of data from many small-scale fisheries is insufficient to allow for the application of conventional assessment methods. Even though in many countries they are moving to closed-loop simulations to assess the performance of different management procedures in data-limited situations, managers in most developing countries are still demanding information on stock status. In this study we use the common metric of harvest rate to evaluate and compare the performance of the following catch-only and length-only assessment models: catch – maximum sustainable yield (Catch-MSY), depletion-based stock reduction analysis (DBSRA), simple Stock Synthesis (SSS), an extension of Catch-MSY (CMSY), length-based spawning potential ratio (LBSPR), length-based integrated mixed effects (LIME), and length-based Bayesian (LBB). In general, results were more biased for slightly depleted than for highly depleted stocks and for long-lived than for short-lived species. Length-based models, such as LIME, performed as well as catch-based methods in many scenarios, and among the catch-based models, the one with the best performance was SSS followed by CMSY.
    Type of Medium: Online Resource
    ISSN: 0706-652X , 1205-7533
    URL: Article
    DOI: 10.1139/cjfas-2019-0276
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2020
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    detail.hit.zdb_id: 1473089-3
    SSG: 21,3
    SSG: 12
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  • 9
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    A global review of MSC certification: Why fisheries withdraw?
    Elsevier BV ; 2022
    In:  Marine Policy Vol. 143 ( 2022-09), p. 105124-
    Details
    In: Marine Policy, Elsevier BV, Vol. 143 ( 2022-09), p. 105124-
    Type of Medium: Online Resource
    ISSN: 0308-597X
    URL: Article
    DOI: 10.1016/j.marpol.2022.105124
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2022
    detail.hit.zdb_id: 1500650-5
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  • 10
    Online Resource
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    Productivity and susceptibility analysis for species caught in Atlantic tuna fisheries
    EDP Sciences ; 2011
    In:  Aquatic Living Resources Vol. 24, No. 1 ( 2011-1), p. 1-12
    Details
    In: Aquatic Living Resources, EDP Sciences, Vol. 24, No. 1 ( 2011-1), p. 1-12
    Type of Medium: Online Resource
    ISSN: 0990-7440 , 1765-2952
    URL: Article
    DOI: 10.1051/alr/2011007
    Language: English
    Publisher: EDP Sciences
    Publication Date: 2011
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    detail.hit.zdb_id: 291280-6
    SSG: 12
    SSG: 21,3
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