Résultats de la recherche
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Further development of pairwise tag detection performance index and its application to the stock assessment of toothfish in the Ross Sea fishery
sustainable yields. The assessment model assumes that all vessels have equal tag detection rates; as a ... consequence including observations from vessels with low detection rates (and/or low tagging survival rates ... are released and recaptured. We then develop selection criteria, which can be used to determine the ... of that assessment. For each vessel in the fishery, every fishing haul from the nominated ‘case ...
Meeting Document : WG-SAM-13/34 : Auteur(s): S. Mormede (New Zealand)
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Use of a population model to assess the impact of longline fishing on wandering albatross populations
rate of 2.29% per year, which concurs with global population trends. Sensitivity analyses of model ... parameters indicate that both adult and juvenile mortality are contributing to the decrease. Wandering ... ; such deaths are likely to be relatively more frequent among young, naive birds. The model is used to ... investigate the potential impacts of new longline fisheries such as that for Patagonian toothfish Dissostichus ...
Meeting Document : WG-IMALF-94/08 : Auteur(s): Coleen L. Moloney, John Cooper, Peter G. Ryan and W. Roy Siegfried (South Africa)
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Revised outline of the dedicated krill survey for CCAMLR Division 58.4.1 during 2018/19 season by the Japanese survey vessel, Kaiyo-maru
Abstract: A dedicated krill survey for CCAMLR Division 58.4.1 during 2018/19 season will be ... kHz) for biomass estimation will be considered using obtained data. Broadband echosounder measurements ... of length and orientation of Antarctic krill will also be conducted. An initial plan of the survey ... meeting in separate papers (Abe et al., 2018; Amakasu et al. 2018). The finalized plan will be submitted ...
Meeting Document : SG-ASAM-18/03 : Auteur(s): H. Murase, K. Abe, R. Matsukura, H. Sasaki and T. Ichii
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Results of the Spanish exploratory longline fishery for Dissostichus spp. in Divisions 58.4.1 and 58.4.2 in the 2013/14 season
that was visited for the commercial Spanish fleet along five seasons in the SSRU 58.4.1C is made ... , together with the estimation of the total Biomass in the entire SSRU using a depletion model. There have ... been some Antarctic toothfish recaptured that would allow, in successive years, to estimate the local ... abundance by tag-recapture models. The IEO is starting the process of reading otoliths with ageing purposes ...
Meeting Document : WG-SAM-14/12 Rev. 1 : Auteur(s): R. Sarralde, L.J. López-Abellán and S. Barreiro (Spain)
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An ecosystem-based approach to management: using individual behaviour to predict the indirect effects of Antarctic krill fisheries on penguin foraging
that changes in penguin foraging behaviour can be used to assess the impact of local fisheries on ... many species within the Antarctic. Despite extensive knowledge of the ecosystem that they occupy, there ... removed. Environmental conditions that decrease krill growth rates or cause krill to spend time in deeper ... penguin reproductive success. 4. Synthesis and applications. These results demonstrate that an ...
Meeting Document : WG-EMM-03/34 : Auteur(s): S.H. Alonzo, P.V. Switzer and M. Mangel (USA)
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Exploratory longline fishing around the Kerguelen Islands (Division 58.5.1). Description of the fishing effort; catchability and target size of Dissostichus eleginoides
fishing carried out by one of these longliners has allowed a description of fishing methods to be made ... by trawlers. The vessel is equipped with an automatic longline baiter which has an efficiency of ... fact that fish become unhooked along the side of the ship, which leads to a real catchability value in ... eleginoides confirm that fish caught are large, their average length being greater than that in catches made ...
Meeting Document : WG-FSA-92/31 Rev. 1 : Auteur(s): G. Duhamel (France)
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Preliminary evaluation of two feedback management strategies for the krill fishery in Subareas 48.1–48.3
Model (KPFM2, also known as Foosa) to consider the risks that implementing various management strategies ... statically distributed among SSMUs in proportion to catches taken during 2009-2016, we found that the two ... feedback strategy mitigated risks, beyond those projected to be incurred by the status quo distribution of ... fishing, in all or most SSMUs. We preliminarily attribute these results to the fact that none of the ...
Meeting Document : SC-CAMLR-XXXVII/BG/12 : Auteur(s): Delegation of the USA
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Maximum entropy reconstructions of krill distribution and estimates of krill density from acoustic surveys at South Georgia, 1996–2000
that do fi t the data can be sorted into piles of images that are the same, and the largest pile will ... be exploited together with new known data (Sivia, 1996). Furthermore, Skilling (1988) has shown ... converge on a reconstruction that is most consistent with the observed data and for which the entropy is ... . Most of the monkeys’ images will not be consistent with the data and can be ignored. All the images ...
Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 91–100 : Auteur(s): Wafy, M.H., A.S. Brierley, S.F. Gull and J.L. Watkins
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Metabarcoding analysis of zooplankton collected from Division 58.4.1 in 2014/15 using NGS platform
“unknown” OTUs, we were able to know that metabarcoding strategy can be possible in the zooplankton survey ... biodiversity of zooplankton in the Indian Ocean of Antarctica, Division 58.4.1 in 2014/15. Compared with the ... reliable data with relatively low cost. Resulting NGS sequencing two different sized zooplankton ... only if additional barcode data of small-sized zooplankton or those with soft tissue are supplemented ...
Meeting Document : WG-EMM-16/33 : Auteur(s): Delegation of the Republic of Korea
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Revised proposal for a CCAMLR sponsored research survey to monitor abundance of pre-recruit Antarctic toothfish in the southern Ross Sea
methodologies. As a result of this review, we propose that the first survey be a pilot, with two main objectives ... Abstract: At its 2010 meeting, the Scientific Committee agreed that a time series of recruitments ... from a well- designed survey in the Ross Sea could be a useful input into the stock assessment model ... survey, the target fish age and length classes to be monitored, appropriate survey strata size and ...
Meeting Document : WG-FSA-11/47 : Auteur(s): S.M. Hanchet, S. Mormede, S.J. Parker and A. Dunn (New Zealand)