Résultats de la recherche
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Gentoo penguin (Pygoscelis papua) population winter/summer behaviour and CEMP time-lapse cameras validation at Galindez Island in the 2018/19 season
station (Galindez Island), GAI CEMP site, provided daily observations of 15 gentoo nests chosen in the ... during 2018-19 season. The detailed observation of bird arrival, nesting, hatch and crèche has been ... provided in two colonies at GAI CEMP site at Galindez Island nearby the Vernadsky station. We inform on the ... results of visual survey of penguin population and penguin count. During the 2018/19 season biologist ...
Meeting Document : SC-CAMLR-38/BG/13 : Auteur(s): Delegation of Ukraine
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Assessment models for Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea region to 2018/19
in the number of tags recaptures in 2018 and 2019; (ii) two years of additional fishing as the ... (MCMC) diagnostics suggested no evidence of non-convergence in the key biomass parameters. Patterns of ... residuals in the age-frequency proportions suggested some evidence of either strong and weak year class ... (Dissostichus mawsoni) in the Ross Sea region (Subareas 88.1 and SSRUs 88.2A-B) is updated and revised using the ...
Meeting Document : WG-FSA-2019/08 : Auteur(s): A. Dunn
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Finfish distribution and abundance in Subareas 48.1 and 48.2, 2016–2018. Research proposal for the second year
Abstract: According to the experience gained in the first phase of the research and observations ... made by WG-SAM-16, a new proposal is provided to determine the distribution and abundance of fish in ... in each stratum depth. With the data obtained in each subarea, the density of fish resources will be ... determined using the Delta method. Additionally, in a delimited sector north of Elephant Island, the catch ...
Meeting Document : WG-FSA-16/31 : Auteur(s): Delegation of Chile
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Monitoring Antarctic toothfish (D. mawsoni) recruitment in the southern Ross Sea
survey monitoring the recruitment of Antarctic toothfish (Dissotichus mawsoni) in the southern Ross Sea ... was started in 2012. The first year established the feasibility of carrying out a random stratified ... data show the appearance of a strong year class in 2012 which progressed through each year to 2017 and ... the appearance of a second strong year class in 2016. Although the changes in age frequency were ...
Meeting Document : WG-FSA-17/57 : Auteur(s): S.M. Hanchet, S. Mormede, S. Parker, K. Large, A. Dunn and B. Sharp
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Recent information relevant to squid resources in the Convention Area
adjacent to the Convention Area, with a catch in excess of 12,000 tonnes. Recent improvements in processing ... Frontal Zone are presented in SC/CAMLR/BG/??. Author(s): Delegation of the United Kingdom Title: Recent ... waters. Although regulations for fishing of squid in nearby waters provide a useful model framework ... , management of a Martialia fishery by CCAMLR would require a better understanding of the distribution and ...
Meeting Document : SC-CAMLR-XIV/BG/22 Rev. 1 : Auteur(s): Delegation of the United Kingdom
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Has climate change promoted genetic fragmentation in the ice-dependent fish Pleuragramma antarcticum?
anti-clockwise Coastal Current, than in the opposite direction. Reduced level of gene flow along the ... in the central region of the western AP for two consecutive years, all suggest that this sea-ice ... pelagic life cycle and plays a major trophic role in the coastal Antarctic marine ecosystem. A previous ... genetic study investigated the population structure of this species, but used mitochondrial DNA sequencing ...
Meeting Document : WG-FSA-13/67 : Auteur(s): C. Agostini, T. Patarnello (Italy), J. Ashford, J. Torres (USA) and L. Zane (Italy)
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Improvements to the multiple-frequency method for in situ target strength measurements
to improve the accuracy and precision of in-situ target strength (TS) measurements using split-beam ... integer multiples of each other. In this study, the method itself was improved by: 1) optimizing the ... improves the rejection of unresolvable and constructively interfering target multiples by combining ... accuracy and precision of the angular and range measurements of the individual frequency detections; 2 ...
Meeting Document : WG-EMM-99/38 : Auteur(s): D.A. Demer (USA) and M.A. Soule (South Africa)
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Changes in the fish biomass around Elephant Island (Statistical Subarea 48.1) from 1976 to 1996
been exploited from 1978179 to 1988189 with most of the commercial harvesting taking place in the first ... two years of the fishery. Results of bottom trawl surveys conducted by Germany in the vicinity of ... Elephant Island in the 1980s showed that stocks of Champsocephalus gunnari, Notothenia rossii ... . Given the low abundance of C. gunnari and other species and the difficulties in managing fisheries which ...
Meeting Document : WG-FSA-97/27 : Auteur(s): Kock, K.-H.
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Predicting changes in the Antarctic krill Euphausia superba population at South Georgia
the abundance and population structure of krill in 1998 and the consequences for predators. Consistent ... biomass and low predator reproductive performance. The change in modal size of krill, from 56 mm in ... December to 42 mm in March was apparently a result of the transport of krill into the region. This is the ... Abstract: Variability in the Southern Ocean is frequently reflected in changes in the abundance ...
Meeting Document : WG-EMM-99/37 : Auteur(s): K. Reid, K.E. Barlow, J.P. Croxall and R.I. Taylor (UnitedKingdom)
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Factors influencing Antarctic krill distribution in the South Shetlands
Abstract: The influences of biological and physical factors in the environment upon krill ... (Euphausia superba) distribution were studies in the area north of South Shetland Islands during 1990/91 ... . Hence, higher diatom biomass may be one of factors forming krill concentrations in the inshore and ... further discussed why the change in spatial distribution of krill occurs from early to late summer. Author ...
Meeting Document : WG-KRILL-93/38 : Auteur(s): T. Ichii, H. Ishii and M. Naganobu (Japan)