Resultados de la búsqueda
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Dynamics of Antarctic krill in the Bransfield Strait during austral summer and autumn investigated using acoustic data from a fishing vessel
Abstract: The Antarctic krill fisheries have evolved to operate in ever more concentrated ... biomass, distribution and swarm structure on these local scales seems critical for assessing the three-way ... interactions between krill, krill-dependent predators and the krill fishery. Acoustic data collected from the ... fishing vessels might help provide such insight. In the present work, the dynamics of krill with regards ...
Meeting Document : WG-EMM-17/40 : Autor(es): X. Wang, G. Skaret, O.R. Godø and X. Zhao
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Modelling the consequences of Antarctic krill harvesting of Antarctic fur seals
Abstract: In terms of the convention governing the Commission for the Conservation of Antarctic ... Marine Living Resources (CCAMLR), management advice for the Antarctic krill (Euphausia superba) fishery ... should take the needs of the predators of krill into account in order to reduce the risk of deleterious ... ). A single species yield model is currently being used by the CCAMLR Scientific Committee to recommend ...
Meeting Document : WG-EMM-01/66 : Autor(es): R.B. Thomson, D.S. Butterworth (South Africa), I.L. Boyd and J.P. Croxall (United Kingdom)
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Haul data analysis from the Polish krill fishery in 1997–1999
Abstract: The analysis of fishing data obtained from the ship’s log of the Polish commercial ... vessel M/T Pollux facilitated the characterization of catches and concentrations of krill between ... and since the vessel carried out catches along with other Polish vessels, the results describe Polish ... catches in this period and area. Each fishing season was different. In 1997 the catches were carried out ...
Meeting Document : WG-EMM-00/17 : Autor(es): E. Jackowksi (Poland)
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Models of tag shedding for double tagging as a function of time at liberty and approximate solutions for the single tagging model in CASAL
Abstract: The model of tag shedding implicit in CASAL is that of Kirkwood and Walker (KW) (1984 ... ) which models the annual tag shedding (i.e. loss) rate as a constant for individual tags. The CASAL ... software applies this model correctly for fish released with a single tag but does not have the facility at ... present to correctly apply the KW model for fish released with two tags. The solution of Dunn et al. (2005 ...
Meeting Document : WG-SAM-11/12 : Autor(es): S.G. Candy (Australia)
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INCORPORATING SAMPLING VARIATION AND RANDOM READER ERROR INTO CALCULATION OF EFFECTIVE SAMPLE SIZE IN THE APPLICATION OF AGE LENGTH KEYS TO ESTIMATION OF CATCH-AT-AGE PROPORTIONS
observations that contribute to the objective function via a multinomial likelihood. The multinomial likelihood ... an effective sample size (ESS) that can be used as the nominal multinomial sample size. The method ... accounts for both the variation associated with sub-sampling of the random length frequency (LF) sample for ... ageing, and random reader error when ageing fish. The catch-at-age ESS is estimated by dividing the ESS ...
Meeting Document : WG-SAM-09/08 : Autor(es): S.G. Candy (Australia)
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THE POWER OF ECOSYSTEM MONITORING
ecosystem monitoring programme, the utility of which depends upon its ability (measured by the statistical ... monitoring programme of the predators of Antarctic krill Euphausia superba at South Georgia together with a ... krill population model to simulate natural and fisheries induced variability in krill abundance, the ... power to detect the effects of different levels of fishing was examined. 3. The power to detect the ...
Meeting Document : WG-EMM-08/P11 : Autor(es): K. Reid, J.P. Croxall and E.J. Murphy
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Revised research plan for the exploratory longline fishery for Dissostichus spp. in Division 58.4.2 in 2014/15
Abstract: Most things related to Dissostichus spp. in the eastern side of Antarctic has not been ... known well as namely the area is data poor areas. In the Division 58.4.1 there are two stocks; one ... extends from the SSRU 58.4.1C to the SSRU 58.4.2A, and the other one to the SSRU 58.4.1H. The population ... sizes were vulnerable with a big range of about 100-1,500 t per SSRU in 58.4.2. During the 2004-2014 ...
Meeting Document : WG-FSA-14/39 : Autor(es): Delegation of the Republic of Korea
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The Ross Sea region Marine Protected Area Research and Monitoring Plan (WG-EMM 2017)
Abstract: The Ross Sea region MPA Research and Monitoring Plan Workshop (WS-RMP) was held at the ... April 2017. The purpose of the workshop was to develop a draft research and monitoring plan (RMP) for ... the Ross Sea region MPA. The RMP is required to be introduced to CCAMLR at the annual meetings of the ... Scientific Committee and Commission later this year, prior to the Ross Sea Region MPA’s implementation in ...
Meeting Document : WG-EMM-17/43 : Autor(es): A. Dunn, M. Vacchi and G. Watters
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New Zealand’s exploratory fishery for toothfish within the SPRFMO Convention Area: update and future directions
Abstract: The 2-year programme of exploratory fishing provided for by SPRFMO CMM 4.14 has been ... successfully completed and new and important biological information has been collected on toothfish outside the ... CCAMLR convention area. The key findings are that only Antarctic toothfish, Dissostichus mawsoni, were ... surveys provide information on the life history of Antarctic toothfish that is consistent with the current ...
Meeting Document : SC-CAMLR-XXXVI/BG/18 : Autor(es): M. Cryer, A. Dunn and J. Fenaughty
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Spatial and temporal operation of the Scotia Sea ecosystem: a review of large-scale links in a krill centred food web
Abstract: The Scotia Sea ecosystem is a major component of the circumpolar Southern Ocean system ... , where productivity and predator demand for prey are high. The eastward-flowing Antarctic Circumpolar ... Current (ACC) and waters from the Weddell–Scotia Confluence dominate the physics of the Scotia Sea ... , manifest by the changing irradiance and sea ice cover, which leads to shorter summers in the south. Summer ...
Meeting Document : WG-EMM-07/P8 : Autor(es): E.J. Murphy, J.L. Watkins, P.N. Trathan, K. Reid, M.P. Meredith, S.E. Thorpe, N.M. Johnston, A. Clarke, G.A. Tarling, M.A. Collins, J. Forcada, R.S. Shreeve, A. Atkinson, R. Korb, M.J. Whitehouse, P. Ward, P.G. Rodhouse, P. Enderlein, A.G. Hirst, A.R. Martin, S.L. Hill, I.J. Staniland, D.W. Pond, D.R. Briggs, N.J. Cunningham and A.H. Fleming (United Kingdom)