Search results
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Temporal scales of foraging in a marine predator: implications for interpreting the distribution of prey
success of a predator. In pelagic marine ecosystems, where prey is often patchily distributed, predators ... must be able to adapt quickly to changes in the spatial patterning of prey. Antarctic fur seals feed ... km) represented by short (5 rain) travel durations. In a study lasting 5 years, the distributions of ... prey patches at the meso-scale level. Only in one year of the study (1990/91) were there indications ...
Meeting Document : WG-EMM-95/23 : Author(s): Boyd, I.L.
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Demographic studies of Antarctic krill Euphausia superba Dana in the Cooperation and Cosmonaut Seas (Indian sector of the Southern Ocean)
Abstract: The reproductive state and size composition of Euphausia superba collected in the ... mortality rates. The duration of the life cycle of E.superba exceeded 5 years in the Cosmonaut Sea and 6 ... years in the Cooperation Sea. Assuming growth for only 180 days per year, growth rates ranged from 0.120 ... researchers in the Prydz Bay region for 1981-1985. In mid summer, E.superba of age 2+ to 4+ were predominant ...
Meeting Document : WG-Krill-94/16 : Author(s): E.A. Pakhomov (Ukraine)
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Monitoring variability and change in the plankton communities of the Scotia Sea through Continuous Plankton Recorder surveys
Abstract: The northern regions of the Scotia Sea demonstrate notable variability in environmental ... conditions, particularly in the location of the Polar Front. This has a strong influence on patterns of ... has been monitored through conducting a series of Continuous Plankton Recorder (CPR) tows in the South ... abundance being far more variable than species composition within and between tows. In general ...
Meeting Document : WG-EMM-16/29 : Author(s): G.A. Tarling, M.Z. Wootton, D.G. Johns, T.D. Jonas, E.J. Murphy and P. Ward
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Demographic effects of extreme weather events: snow storms, breeding success, and population growth rate in a long-lived Antarctic seabird
consequences of such events. In this study, we aimed to quantify the effects of snow storms on nest survival in ... population growth rate. We used detailed data on daily individual nest survival in a year with frequent and ... season and nearly 30% of the interannual variation in colony productivity in period 1985–2014. Snow ... also found state-dependent effects of snow storms and chicks in poor condition were more likely to die ...
Meeting Document : WG-EMM-16/P13 : Author(s): S. Descamps, A. Tarroux, Ø. Varpe, N.G. Yoccoz, T. Tveraa and S.-H. Lorentsen
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Report of the UK groundfish survey at South Georgia (CCAMLR Subarea 48.3) in January 2017
differences in C. gunnari diet composition were observed. Krill were almost absent from fish sampled at Shag ... Rocks, at low levels in the northern strata of South Georgia and more abundant in the Southern strata ... Dissostichus eleginoides were low. A small peak in the length frequency distribution was present at lengths of ... icefish species were very similar to results obtained in 2015. However, the estimated biomass of ...
Meeting Document : WG-FSA-17/44 : Author(s): M. Belchier, V. Foster, S. Gregory, S. Hill, V. Laptikhovsky, P. Lafite and L. Featherstone
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Joint report on exploratory fishing in Divisions 58.4.1 and 58.4.2 between the 2011/12 and 2017/18 fishing seasons
arrangements are in place as set out in Conservation Measures 41-11 and 41-05. WG-FSA-16/29 outlined the first ... objectives, methods and milestones in accordance with ANNEX 24-01/A. Subsequent research progress has ... mitigation of Macrourus by-catch in research block 58.4.1_6, and estimation of Macrourus biomass and ... sustainable bycatch in Divisions 58.4.1 and 58.4.2 (WG-FSA-17/16); and description of encounter rates of VME ...
Meeting Document : WG-SAM-18/35 Rev. 1 : Author(s): Delegations of Australia, France, Japan, Republic of Korea and Spain
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Revision of the precautionary approach to ensuring the rational use of the living resource (Dissostichus eleginoides) in Subarea 48.3 (full version)
. This paper reviews the long-term decline in the size structure of Patagonian toothfish (Dissostichus ... eleginoides) observed in longline catches taken in the South Georgia Area (FAO Area 48.3). We note that from ... the start of the 2000s until now, longline fishing in the South Georgia area has targeted immature ... fish smaller than 100 cm. The issue of non-rational use of the Patagonian toothfish stock in Subarea ...
Meeting Document : WG-FSA-2019/40 : Author(s): Delegation of the Russian Federation
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Recommendation for an explicit limit reference point for the mackerel icefish (Champsocephalus gunnari) fishery in CCAMLR Statistical Division 58.5.2
Abstract: Large fluctuations in abundance are a persistent feature of the populations of mackerel ... icefish (Champsocephalus gunnari) in the waters adjacent to Heard Island and the McDonald Islands in ... icefish in Division 58.5.2 is set to zero if the stock is determined to be below 1000 tonnes, or the catch ... limit recommended by the decision rules is below 100 tonnes in the first year after a survey has been ...
Meeting Document : WG-FSA-11/34 : Author(s): Delegation of Australia
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DETECTION OF VULNERABLE MARINE ECOSYSTEMS IN THE SOUTHERN SCOTIA ARC (CCAMLR SUBAREAS 48.1 AND 48.2) THROUGH RESEARCH BOTTOM TRAWL SAMPLING AND UNDERWATER IMAGERY
Abstract: High densities of vulnerable marine ecosystem (VME) indicator taxa were encountered in ... Subareas 48.1 and 48.2). These areas, which have been proposed for inclusion in the CCAMLR VME registry ... were detected in most cases utilizing occurrence and abundance of VME indicator taxa in research bottom ... trawl samples, as well as by way of in situ observations with an underwater photographic/video imaging ...
Meeting Document : WG-EMM-09/32 : Author(s): S.J. Lockhart and C.D. Jones (USA)
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Practical options for developing feedback management for the krill fishery in Subarea 48.2
might facilitate the development of feedback management procedures for the krill fishery in Area 48. In ... reviewing the state of ecological knowledge for Subarea 48.2, we conclude that movement towards Stage 2 (in ... knowledge base, but that this will take time, especially in the context of climate change. We suggest that ... recent research initiatives will help provide new information; however, a fundamental step-change in ...
Meeting Document : WG-EMM-14/04 : Author(s): P. Trathan (United Kingdom), M. Santos (Argentina) and O.R. Godø (Norway)