Search results
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Estimation of the fishery–krill–predator overlap
Abstract: Work undertaken during the intersessional period has enabled better use of the krill ... fishery data, and a comparison between the three existing indices of fishery-krill-predator overlap used ... at nine levels of spatio-temporal resolution and using normal, exponential and uniform foraging ... the level of overlap in recent years (1995-98) than estimated with either the catch in the CPD or the ...
Meeting Document : WG-EMM-99/11 : Author(s): Secretariat
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A method to evaluate selection of Antarctic krill in towed fishing gears
) apply different trawl designs. Very little information exists on the size selectivity of E. superba ... . Size selectivity describes a given trawls designs ability to catch different sizes of a population and ... is valuable information for the management of harvested marine stocks. Size selectivity data is ... the time. FISHSELECT is developed as an alternative method, and is based on thorough measurements of ...
Meeting Document : WG-EMM-13/34 : Author(s): L.A. Krag, B. Herrmann (Denmark), S. Iversen, A. Engås, S. Nordrum and B.A. Krafft (Norway)
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Genetic population structure of the mackerel icefish, Champsocephalus gunnari, in Antarctic waters
Abstract: Genetic population structure of the mackerel icefish, Champsocephalus gunnari, in ... subjected to starch gel electrophoresis. sixteen putative enzyme-coding loci were examined, of which 7 were ... 1.15.1.1). Routine scoring of 358 fish at the 16 loci revealed below average levels of genetic variability ... , with the proportion of polymorphic loci, P = 0.175, mean heterozygosities per locus, HL = 0.058, and ...
Meeting Document : WG-FSA-91/22 : Author(s): G.R. Carvalho and M. Warren (United Kingdom)
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Diet and trophic niche of Antarctic silverfish (Pleuragramma antarcticum) in the Ross Sea, Antarctica
Abstract: The diet of Antarctic silverfish (Pleuragramma antarcticum) was evaluated by examining ... stomach contents of specimens collected in the Ross Sea (71°–77°S, 165°E–180°) in January–March 2008 ... composition of carbon and nitrogen. According to index of relative importance (IRI), the most important prey ... items of silverfish were copepods (IRI 81% over all specimens), predominantly Metridia gerlachei and ...
Meeting Document : WG-EMM-12/54 : Author(s): M.H. Pinkerton, J. Forman, S.J. Bury, J. Brown, P. Horn and R.L. O’Driscoll (New Zealand)
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Assessment models for Patagonian toothfish in research block 5843a_1 of Division 58.4.3a, Elan Bank
Abstract: I made two sensitive runs of CASAL catch at length models (LENGTH_MODEL) for stock ... status assessments of Dissostichus eleginoides in research block 5843a_1 in Division 58.4.3a for the ... comprised of two fisheries split by depths of 1 200 m as the model in WG-SAM-14/17. Number of longlines was ... between the two models were set as follows: year class strength (YCS) was fixed; parameters of ALK were ...
Meeting Document : WG-FSA-14/22 : Author(s): K. Taki (Japan)
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New page in the Antarctic krill fishing (Translation from The Fishing Industry of Ukraine, 1–2/2007: 11–14)
Abstract: Antarctic krill (Euphausia superba) is one of the largest marine resources of animal ... origin protein on the planet. Krill is the key element of the Antarctic Region ecosystem. Construction of ... modern vessels for krill fisheries and processing is foreseen anyway; introduction of new technologies on ... and other preparations. Became possible due to the construction of specialized large-capacity fish ...
Meeting Document : SC-CAMLR-XXVI/BG/26 : Author(s): Delegation of Ukraine
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Monitoring a marine ecosystem using responses of upper trophic level predators
Abstract: 1. This study examined the changing status of the marine ecosystem at the island of ... index (CSI). 2. Sensitivity analyses showed that missing values had a large effect upon the accuracy of ... the CSI but this effect was reduced if the individual variables were highly correlated. The level of ... correlation and proportion of missing values within the empirical data set were within the acceptable range ...
Meeting Document : WG-EMM-01/25 : Author(s): I.L. Boyd and A.W.A. Murray (United Kingdom)
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Summary of research voyages in the South Orkney Islands region in 2015/16
inform the further development of spatial management, including feedback management of the krill fishery ... undertaken in the austral summer of 2015-16. It collected at-sea data on the distribution, abundance and ... behaviour of krill and its predators across a range of temporal and spatial scales using acoustics, nets and ... vessel and field camps on Monroe Island, Powell Island and at Signy where satellite tracking of penguins ...
Meeting Document : SC-CAMLR-XXXV/BG/28 : Author(s): Delegations of the United Kingdom and Norway
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A preliminary model-based approach for estimating natural mortality of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea Region
directly to the productivity of a stock, stock status, and estimated precautionary yields. In the Ross Sea ... constant across age and sex. In 2018, the independent review of the Ross Sea region D. mawsoni stock ... assessment recommended that CCAMLR consider the robustness and reliability of estimating natural mortality in ... the stock assessment model. We undertake a preliminary investigation of estimating natural mortality ...
Meeting Document : WG-SAM-2019/04 : Author(s): B. Moore, S. Mormede, S. Parker and A. Dunn
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Manual for age determination of Antarctic toothfish (Dissostichus mawsoni)
Abstract: Production of an age determination manual for Antarctic toothfish (Dissostichus mawsoni ... ) is part of the focus of the SC-CAMLR workplan for 2010. The aim of the current work was to produce a ... manual that presents standard protocols used by the National Institute of Water and Atmospheric Research ... Limited (NIWA) for estimating age of D. mawsoni. It uses otoliths collected from the Ross Sea region and ...
Meeting Document : WG-FSA-10/21 : Author(s): C.P. Sutton and P.L. Horn (New Zealand)