Resultados de la búsqueda
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Entanglement of Antarctic fur seals Arctocephalus gazella in man-made debris at Bird Island, South Georgia during the 1994 winter and 1994/95 pup-rearing season
Abstract: Surveys of Antarctic fur seals entangled in man-made marine debris were carried out for ... juveniles. Of entangled animals the proportion of males affected was 67%, approximately the same as in 1993 ... and 1991, but two-thirds of the value recorded in 1990 and 1992. The proportion of entangled animals ... bands and the incidence of net fragment debris was higher than 1993 (but similar to 1991) during the ...
Meeting Document : SC-CAMLR-XIV/BG/08 : Autor(es): Delegation of the United Kingdom
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Bias in acoustic biomass estimates of Euphausia superba Dana to diel vertical migration
Abstract: The diel vertical migration of Antarctic krill (Euphausia superba) can greatly bias the ... results of qualitative and quantitative hydroacoustic surveys which are conducted with a down-looking ... sonar and independent of the time of day. To demonstrate and quantify these negative biases on both the ... estimates of biomass distribution and abundance, a time-depth-density analysis was performed. Data for this ...
Meeting Document : WG-KRILL-93/48 : Autor(es): D.A. Demer and R.P. Hewitt (USA)
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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 : Autor(es): G.R. Carvalho and M. Warren (United Kingdom)
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Proposal to commission an independent review of the Secretariat’s data management systems
Abstract: 1. The Secretariat manages a comprehensive, detailed set of independent or related ... databases which support the work of the Commission and give effect to Article XX of the CAMLR Convention ... . Since the establishment of CCAMLR 28 years ago, there has been no formal, in-depth audit of the ... consider the merits of an independent review of CCAMLR’s data management systems. Author(s): Secretariat ...
Meeting Document : WG-SAM-10/08 : Autor(es): Secretariat
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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 : Autor(es): M.H. Pinkerton, J. Forman, S.J. Bury, J. Brown, P. Horn and R.L. O’Driscoll (New Zealand)
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Competition-mediated prey availability drives Adélie penguin (Pygocelis adeliae) chick size, mass and condition at colonies of differing size in the southern Ross Sea
Abstract: Understanding the relative effects of biotic and abiotic drivers of survival, and the ... populations. Body size, mass and condition may be important determinants of an organism’s ability to survive ... periods of low resource availiability or high metabolic demand. Such effects may be particularly ... important for naïve juveniles when they first become independent of their parents and must learn to forage ...
Meeting Document : WG-EMM-13/31 : Autor(es): A.L. Whitehead (Australia), P. O’B. Lyver (New Zealand), G. Ballard (USA), K. Barton, B.J. Karl (New Zealand), D.G. Ainley, K. Dugger, S. Jennings (USA), A. Lescroël (France) and P.R. Wilson (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 : Autor(es): K. Taki (Japan)
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Analysis of catch and effort data in SSRUs 882A–B North from the 2015 fishing season including comparisons with data from exploratory fisheries and closed areas
Abstract: At the 2015 meetings of WG-FSA and the Scientific Committee, the UK, New Zealand and ... Norway noted that they would perform an analysis of CPUE variability, haul duration and haul speed from ... the 2015 survey of the northern region of SSRUs 88.2A–B, including a comparison with all exploratory ... within the range of that observed in other exploratory fisheries and similar to those typically observed ...
Meeting Document : WG-SAM-16/16 Rev. 1 : Autor(es): K. Large, A. Dunn, S.J. Parker, T. Earl, C. Darby, M. Söffker and O.R. Godø
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Scientific requirements for an orderly development of the krill fishery
of the fishery. The aim of this paper, which Australia committed to present to this year’s WG-EMM, is ... of these requirements is also provided. The paper recommends that in keeping with the precautionary ... Abstract: At CCAMLR XXV Australia presented the results of the BROKE-West acoustic krill biomass ... precautionary catch limit for krill in Statistical Division 58.4.2 of 1.49 million tonnes (up from 450 000 ...
Meeting Document : WG-EMM-07/23 : Autor(es): A. Constable, G. Slocum and S. Nicol (Australia)
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Towards a validation of ageing in mackerel icefish (Champsocephalus gunnari) – can we estimate age more accurately?
Abstract: Age estimates of mackerel icefish from different laboratories obtained during a CCAMLR ... older than 3 or 4 years were aged. These differences could not be reconciled at the end of the exchange ... . A second age determination workshop on mackerel icefish to improve the accuracy of age determination ... was agreed upon at the last meeting of the ‘Working Group on Fish Stock Assessment’. Our report ...
Meeting Document : WG-FSA-05/23 : Autor(es): K.-H. Kock (Germany) and Zh.A. Frolkina (Russia)