Résultats de la recherche
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Short note: time series of Drake Passage Oscillation Index (DPOI) from 1952 to 1988
. A low DPOI less than 10 hPa appeared in 1967 and 1980. Intervals between the years of low DPOI were ... obtaining appropriate data. The total number of monthly data used from 1952 to 1988 was 420. The mean ... differences across the Drake Passage, sea ice cover and chlorophyll-a in the Antarctic Peninsula area during ... westerlies were especially regarded as a key environmental index. Fluctuations in the westerlies across the ...
Meeting Document : WG-EMM-02/44 : Auteur(s): M. Naganobu and K. Kutsuwada (Japan)
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Movement and growth of tagged toothfish around South Georgia and Shag Rocks (Subarea 48.3)
of the fish recaptured to date were tagged and released during the experimental pot fishing in 2000 ... recaptures of these fish tagged at South Georgia or elsewhere in the South Atlantic. Similarly, tags ... Abstract: In 2000 the UK started a toothfish (Dissostichus eleginoides) tagging programme. The ... aims were to investigate the spatial and temporal movement of fish and to validate growth estimates ...
Meeting Document : WG-FSA-02/28 : Auteur(s): T.R. Marlow, D.J. Agnew and I. Everson (United Kingdom)
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Results of trials undertaken around Crozet Island using pots to target Patagonian toothfish
comparison are not straightforward due to the large number of pot model tested and the large differences in ... Abstract: Patagonian toothfish (Dissostichus eleginoides) is the target species of a bottom ... longline fishery occurring in the Southern Indian Ocean off Kerguelen and Crozet islands. This fishery is ... exposed to high levels of interactions with cetaceans removing fish from the fishing gear and to ...
Meeting Document : WG-FSA-10/10 : Auteur(s): N. Gasco, P. Tixier and C. Guinet (France)
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Spatial distribution of foraging by female Antarctic fur seals
could eat most of the krill present in some regions where they forage intensively. However, mean ... sites followed the same pattern of travel. There was no detectable difference in this behavior among ... consumption was about one-tenth of the mean density of krill. Author(s): I.L. Boyd, I.J. Staniland and A.R ... Abstract: The study tested the hypothesis that the distribution of critical habitat for foraging ...
Meeting Document : WG-EMM-01/26 : Auteur(s): I.L. Boyd, I.J. Staniland and A.R. Martin (United Kingdom)
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Temperature-dependent growth of Thysanoessa macrura: inter-annual and spatial variability
variability in growth rates of highly abundant zooplankton is critical to predict the impact of climate change ... apart to estimate growth rates of one the most euphausiids in the Southern Ocean, Thysanoessa macrura ... of T. macrura may increase in regions exhibiting warming trends, such as the Antarctic Peninsula ... growth. Growth rates of T. macrura varied between years and water masses, ranging from-0.037 mm day-1 in ...
Meeting Document : WG-EMM-13/39 : Auteur(s): R.M. Driscoll, C.S. Reiss and B.T. Hentschel (USA)
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Time series of Drake Passage Oscillation Index (DPOI) from 1952 to 2005, Antarctica
Abstract: An assessment of the environmental processes influencing variability in the recruitment ... krill recruitment and density in the Antarctic Peninsula area with an environmental factor; strength of ... and density of Antarctic krill (Euphausia superba DANA) is important as variability in krill stocks ... affects the Antarctic marine ecosystem as a whole. Naganobu et al. (1999) had assessed variability in ...
Meeting Document : WG-EMM-05/17 : Auteur(s): M. Naganobu and K. Kutsuwada (Japan)
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Age validation of Patagonian toothfish (Dissostichus eleginoides) from Heard and Macquarie Islands
. eleginoides in the Heard Island and Macquarie Islands fisheries has included injection of most fish with ... selected for analysis. Strontium (Sr) marks were detected in 139 of the 142 otoliths examined. Using the ... number of observed increments after the mark in relation to the time-at-liberty between tagging and ... counting presumed growth increments on the sectioned face of sagittal otoliths. While there is a general ...
Meeting Document : WG-FSA-05/60 : Auteur(s): K. Krusic-Golub and R. Williams (Australia)
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Using stationary acoustic platforms to assess precision and accuracy of acoustical krill surveys
the South Orkney Islands since 2014, and in this report some of these data have been analysed in order ... Abstract: The current CCAMLR protocol specifies daytime acoustic sampling in order to avoid ... issues of krill migrating too close to the surface to be acoustically detected, as well as potential ... issues of diel changes in acoustic scattering strengths. However, due to logistic constraints, acoustic ...
Meeting Document : WG-EMM-2019/32 : Auteur(s): T. Klevjer, G. Skaret and B.A. Krafft
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Variation or reproductive performance of seabirds and seals at South Georgia, 1976–1986 and its implication for Southern Ocean monitoring studies
Orkney Islands) are summarised and reviewed. Breeding success of the Wandering Albatross, which breeds in ... . The fluctuations in reproductive performance of the krill-eating, summer-breeding penguins at Signy ... Chinstraps, which suffered badly in 1980-81 and 1982-83) with the date of ice break-out in late spring ... , penguin and fur seal biology. The results are reviewed in terms of their suitability for detecting changes ...
Meeting Document : WG-CEMP-87/13 : Auteur(s): J.P. Croxall, T.S. McCann, P.A. Prince and P. Rothery (United Kingdom)
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Krill physiology and impact of temperature variations: a comparative approach
Abstract: The purpose of this "paper" is to present a research project in progress on ... quickly became essential for a better understanding of the mechanisms involved in relation to the ... 17 transcriptomes are already available), metabolomic and lipidomic approach in the frame of French ... the physiology of Antarctic krill, with a focus on the response to environmental temperature ...
Meeting Document : WG-EMM-2019/70 : Auteur(s): J.-Y. Toullec and C.-Y. Lee