Résultats de la recherche
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Simulations to evaluate model performance for Antarctic toothfish stock assessment in the Amundsen Sea region
. Simulations suggest that the current research plan with the current levels of catch and tagging rate is likely ... shown promising results to date, with 8 interseason tags recaptured in the South area in 2016 and 12 ... models showed that using two independent models lead to higher estimates of biomass in the North and ... lower estimates of biomass in the South, but that the two independent models fitted the data poorly ...
Meeting Document : WG-SAM-17/40 : Auteur(s): S. Mormede and S. Parker
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Population genetic structure of Patagonian toothfish in the West Indian Ocean sector of the Southern Ocean
variation was seen within collections. Comparisons with previously collected genetic data from Heard and ... . Further to this, Hartl and Clark (1989) state that genetic identity (homogeneity) can be maintained with ... al. (2001)) was digested with NlaIII. Table 1: Sample sizes and average lengths of Dissostichus ... Ocean sector could not be rejected. The caveat on this statement is that the failure to disprove the ... Southern Ocean suggests that gene fl ow between these geographically isolated locations is likely to be ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 21–32 : Auteur(s): Appleyard, S.A., R. Williams and R.D. Ward
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Fishery Report: Dissostichus eleginoides South Georgia (Subarea 48.3)
of K was very wide. It was noted that the assessment should be considered as a risk assessment ... . Interactions with cetaceans continue to be reported by observers in Subarea 48.3. There has been an increase ... . eleginoides discarded, including those with jellymeat condition, to be reported. These catches count ... Interactions involving marine mammals with longline fishing operations .... 6 7. Ecosystem effects ...
Document : Site Section: Publications
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Beach debris survey Signy Island, South Orkney Islands, 1998/99
from beaches at Signy may be partly to do with their longevity in the marine environment. The increase ... increased effort to ensure that vessels are aware of, and comply with, regulations prohibiting the disposal ... that 40% had come from ships or fishing vessels in the form of packaging bands, fishing net and foam ... packing material. The last accounted for 58% of items small enough to be ingested by seals and seabirds ...
Meeting Document : CCAMLR-XVIII/BG/7 : Auteur(s): Delegation of the United Kingdom
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DEVELOPMENT OF A SPATIALLY EXPLICIT AGE-STRUCTURED STATISTICAL CATCH-AT-AGE POPULATION DYNAMICS MODEL FOR MODELLING MOVEMENT OF ANTARCTIC TOOTHFISH IN THE ROSS SEA
for MCMC that could be investigated. And, in order to address the questions of the adequacy of the ... maturity state spatial movement model. SPM is an aggregate movement model suitable for use with large ... numbers of areas, and is implemented as a discrete time-step state-space model that represents a cohort ... product of a set of preference functions that are based on known attributes of spatial location. SPM was ...
Meeting Document : WG-SAM-08/14 : Auteur(s): A. Dunn and S. Rasmussen (New Zealand)
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A two-fleet ASPM assessment of the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity
annual legal catch not to exceed 500 tonnes for the time being, together with encouragement that this be ... yields may be possible, it is suggested that a prudent management approach at this stage would be for the ... Butterworth (2004) that permitted annual fluctuations about a deterministic stock-recruitment relationship is ... updated to take account of further catch, GLM standardised CPUE and catch-at- length information that has ...
Meeting Document : WG-FSA-05/58 : Auteur(s): A. Brandão and D.S. Butterworth (South Africa)
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2006 assessment of the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity
% of its average pre-exploitation level in terms of spawning biomass. It is suggested that it would be ... to be taken by pots (which avoid the cetacean predation associated with longlining). Specific issues ... Butterworth (2005) that permitted annual fluctuations about a deterministic stock-recruitment relationship is ... updated to take account of further catch, GLM standardised CPUE and catch-at-length information that has ...
Meeting Document : WG-FSA-06/58 : Auteur(s): A. Brandão and D.S. Butterworth (South Africa)
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Using acoustic echo counting to estimate grenadier abundance in the Ross Sea (SSRU88.1I)
fishery for toothfish in the Ross Sea. Previous studies concluded that acoustics methods could be used to ... index the relative abundance of grenadiers and be useful for exploring spatial distribution. Automated ... . These methods can be applied to large volumes of relatively low quality, opportunistically collected ... at seabed depths of 700–1000 m, and revealed consistent spatial patterns, with higher numbers of ...
Meeting Document : WG-FSA-14/62 : Auteur(s): Y. Ladroit, R.L. O’Driscoll and S. Mormede (New Zealand)
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The Secretariat review of the Strategic Plan, associated activities and outcomes
Abstract: At CCAMLR-XXIX, the Commission recommended that a staffing and salary strategy be ... -EMM with a brief description of the process that has been supported since CCAMLR-XXIX to address these ... included in the review of the Secretariat’s Strategic Plan and that SCAF consider the outcomes of that ... Scientific Committee (SC-CAMLR-XXIX, paragraph 14.2) that a review of the Secretariat’s data management ...
Meeting Document : WG-EMM-11/09 : Auteur(s): Secretariat
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Fishery Report 2013: Champsocephalus gunnari South Georgia (Subarea 48.3)
. Spawning takes place in shallow water, with eggs laid on the seafloor. Larvae are pelagic and may be ... seabirds, it shall cease fishing and shall be excluded from further participation in the fishery in that ... strata were evident. In the southwest region T. gaudichaudii was the dominant diet item, with fish and T ... season is represented by the year in which that season ended, e.g. 2012 represents the 2011/12 CCAMLR ...
Document : Site Section: Publications