Résultats de la recherche
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CPUE and recruitment indices calculated from log book data of Japanese krill fisheries
be the result of the alternation of operational strategy in relation to the product quality ... Abstract: CPUE and Recruitment indices during 1980 to 1995 were calculated based on the log book ... data from commercial krill trawlers. Long-term variation of monthly CPUE was shown but this trend might ... . Recruitment indices in this paper agreed with Sigel and Loeb (1995) in genaral trend, however, some ...
Meeting Document : WG-EMM-96/50 : Auteur(s): Ichii, T., Kawaguchi, S., Naganobu, M.
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Destruction of Antarctic terrestrial ecosystems by a rapidly increasing fur seal population
past decade there has been a dramatic increase in the number of Antarctic fur seals Arctocephalus ... of seals were present on the island prior to the initiation of commercial hunting in the early 1820s ... Abstract: The terrestrial environment of Signy Island, South Orkney Islands, maritime Antarctic ... . The impact that the continuing increase of these seals had made on the island's terrestrial and ...
Meeting Document : SC-CAMLR-VII/BG/06 : Auteur(s): R.I. Lewis Smith (United Kingdom)
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Beached marine debris surveys and incidences of seabird/marine mammal entanglements and hydrocarbon soiling at Bird Island and King Edward Point, South Georgia, and Signy Island, South Orkneys, 2009/10
the long-term mean for debris associated with most seabird species. Author(s): Delegation of the ... (November 2009 to March 2010). Plastic and longline fishing line were the most commonly observed items (in ... varying quantities) at Bird Island, and the majority of items collected at Signy Island were either ... net) and none were observed at Signy. In total, 149 items of marine debris were found in association ...
Meeting Document : SC-CAMLR-XXIX/BG/10 : Auteur(s): Delegation of the United Kingdom
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CCAMLR observer manual questionnaires: summary results of preliminary analysis during its introductory period
Abstract: Preliminary analysis of data from the questionnaires of krill fishery behavior in ... CCAMLR observer manual was undertaken. The analysis revealed possible inconsistency in definitions of the ... event codes among different skippers. Some suggestions were made to improve the quality of questionnaire ... format to better understand the nature of the fishery. Author(s): S. Kawaguchi and S. Nicol (Australia ...
Meeting Document : WG-EMM-05/31 : Auteur(s): S. Kawaguchi and S. Nicol (Australia)
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Summary of Ross Sea skate tagging programme results
Abstract: Over 9,000 skates have been tagged and released in the Ross Sea over a period of seven ... 1,000 m and tagged. In-water tagging greatly reduces the incidence of broken jaws in skates, and ... years, and 47 (0.5%) have been recaptured. The recapture of tagged Amblyraja georgiana after up to four ... probably increases the survival of released animals. Unfortunately, this means that length at release can ...
Meeting Document : WG-FSA-06/32 : Auteur(s): S.L. Ballara, A. Dunn and M.P. Francis (New Zealand)
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Net sample validation of acoustic techniques used to identify and size Antarctic krill
echo-charts were also identified as krill on the basis of their difference in backscatter at 38 and 120 ... the functionality of acoustic target identification techniques. Mean volume backscattering strength ... collected with an RMT8. Around 80 % of the targets thought to be krill on the basis of their appearance on ... identified and distinguished from all other types of backscatter. Traditionally this has been achieved by ...
Meeting Document : WG-EMM-97/46 : Auteur(s): Watkins, J.L., Brierley, A.S.
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Distribution and biology of grey notothen (Lepidonotothen squamifrons) around South Georgia and Shag Rocks (Southern Ocean) CCAMLR Subarea 48.3.
distribution, size, maturity, and diet. Distribution was patchy with aggregations in specific ‘hotspots’ to the ... east of Shag Rocks and the west of South Georgia. Reliable biomass estimates were not possible due to ... recognisable cohort progression and a trend of increasing size over time indicating a potential recovery of the ... knowledge of L. squamifrons in this region will be valuable in future research on habitat and foodweb ...
Meeting Document : WG-FSA-12/34 : Auteur(s): S. Gregory, J. Brown and M. Belchier (United Kingdom)
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Spatial distribution of Champsocephalus gunnari size and age are related with depth
all species resulted significantly associated with depth, positively in the case of C. gunnari and N ... Abstract: The results of four fish surveys (EDUARDO L HOLMBERG 1994 to 1997) are analyzed to ... detect associations between the sizes of Champsocephalus gunnari (also age classes), Gobionotothen ... . rossii and negatively for the remaining species. Less association with depth is observed in C. gunnari as ...
Meeting Document : WG-FSA-97/45 : Auteur(s): Marschoff, E.R., Serra, J.A., Gonzalez, B., Calcagno, J.
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Feeding and food intake of Electrona carlsbergi (Tåning, 1932) Myctophidae
. carlsbergi during the year in the waters to the south of the Antarctic Convergence is about 15 times fish ... by various methods was from 3.7 to 5.6% of fish body weight. The amount of food consumed by E ... Paper Title: Feeding and food intake of Electrona carlsbergi (Tåning, 1932) Myctophidae Abstract ... / Description: In summer and autumn Electrona carlsbergi feeds mainly on copepods. Daily food intake estimated ... Romanova method (1958). The mean rate of food digestion estimated by means of evaluating changes in ... fish body weight. The amount of food consumed by E. carlsbergi during the year in the waters to the ... carlsbergi (Tdning) is one of the most abundant species of the Myctophidae family living in the Southern ... in different parts of the Southern Ocean. (Kozlov, Tarverdieva, 1989; Oven et al., 1990; Tarverdieva ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 411–416 : Auteur(s): Gerasimova, O.V.
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Acoustic data analysis and models of krill spatial distribution
used in three descriptors of krill spatial aggregation: power spectra for krill biomass fluctuations in ... space, semivariogram (spatial autocorrelation of krill biomass) and the frequency distribution of krill ... biomass estimate. The wavenumber spectrum resembles a white noise at scales of 2-20 km, although at scales ... smaller than 1 km the spectrum appears to lose its power significantly. The semivariance of biomass does ...
Meeting Document : SC-CAMLR-VII/BG/25 : Auteur(s): United States of America