Search results
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Distribution of salps near the South Shetland Islands; their ecological significance in the area
krill biomass in the area. Two species; Salpa thompsoni and Ihlea racovitzai were found, and the former ... the high-chlorophyll a area, in contrast, salps exhibited high biomass in the area of low chlorophyll ... : Distribution of salps near the South Shetland Islands; their ecological significance in the area Approval ...
Meeting Document : WG-KRILL-93/17 : Author(s): J. Nishikawa, M. Naganobu, T. Ichii and K. Kawaguchi (Japan)
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Surveys of breeding penguins and other seabirds in the South Shetland Islands, Antarctica, January – February 1987
Abstract: Surveys of the South Shetland Islands, Antarctica in 1987 provided data on the size and ... estimate of 1,618,370 to 2,084.570 breeding Chinstrap Penguins, the most abundant penguin in the study area ... low search effort in the past. Author(s): W.D. Shuford and L.D. Spear (USA) Title: Surveys of ... breeding penguins and other seabirds in the South Shetland Islands, Antarctica, January – February 1987 ...
Meeting Document : SC-CAMLR-VI/BG/19 : Author(s): W.D. Shuford and L.D. Spear (USA)
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Correlation of sea-surface temperature in Ross Sea, Weddell Sea and the sea off Peru for the ice analysis
Abstract: Following the note by the Working Group in paragraph 4.21 in WG-SAM-17 report on the ... phenomena such as El Niño/El Niño Southern Oscillation or rising temperatures/increased variability in the ... , T. Ichii and T. Okuda Title: Correlation of sea-surface temperature in Ross Sea, Weddell Sea and ...
Meeting Document : WG-FSA-17/08 : Author(s): T. Namba, T. Ichii and T. Okuda
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A RE-ANALYSIS AND UPDATE OF THE ANTARCTIC KRILL BIOMASS IN THE SOUTH SHETLAND ISLANDS, THROUGH 2011
. Recent changes in the acoustic methodology and target strength models are the basis for the recalculation ... biomass in the northern Gerlache Strait, an area of just over 1100 km2, exceeded 110 g m-2 which results ... in a biomass of more than 128 000 tons. Refining biomass estimates and estimates of recruitment will ... help to better inform CCAMLR about the status and trends of krill in Area 48.1 an area experiencing the ...
Meeting Document : WG-EMM-11/26 : Author(s): A. Cossio, C. Reiss and R. Driscoll (USA)
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Seal mitigation measures on trawl vessels fishing for krill in CCAMLR Subarea 48.3.
) in Siena, Italy, the UK reported on the by-catch of fur seals (Arctocephalus gazella) in the krill ... fur seal deaths in the fishery. WG-EMM requested that the UK provide further details of the methods ... entanglements on krill vessels fishing around South Georgia in the 2004 fishing season. The measures implemented ... trawl vessels fishing for krill in CCAMLR Subarea 48.3. Approval: Approved ...
Meeting Document : WG-FSA-05/P1 : Author(s): Charman, C., Clark, J., Hooper, J., Agnew, D.
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Preliminary assessment of toothfish in Subarea 48.3
were high numbers of the 2001 cohort in commercial catches in 2009 onwards. It is likely that it is ... due to a combination of a strong 2001 cohort and a change in selectivity for the commercial fleet, but ... surveys and the stabilisation of both SSB and CPUE that a long-term yield in the region of 2 000 tonnes ... assessment of toothfish in Subarea 48.3 Approval: Approved ...
Meeting Document : WG-FSA-11/33 Rev. 1 : Author(s): T. Peatman, R.E. Mitchell, G. Parkes and D.J. Agnew (United Kingdom)
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Depletion-corrected average catch: a simple formula for estimating sustainable yields in data-poor situations
yield component and an unsustainable “windfall” component associated with a one-time reduction in stock ... production, in the form of a “windfall ratio”. The DCAC is calculated as the sum of catches divided by the ... sum of the number of years in the catch series and this windfall ratio. Input information includes the ... sum of catches and associated number of years, the relative reduction in biomass during that period ...
Meeting Document : WG-SAM-11/P3 : Author(s): A.D. McCall
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Biological acoustic survey in the marginal ice edge zone of the Bellingshausen Sea
Abstract: An acoustic survey at 38 and 120 kHz was carried out from RRS Discovery in the ... of krill (Euphausia superba) distribution and biomass in the marginal ice edge zone. Krill biomass ... phase. On this first survey a large swarm (2.8 km in extent) had a potential biomass of 3.7 x 104 tonnes ... . Some calculations are presented to show the potential impact of krill on the flux of carbon in the area ...
Meeting Document : WG-Krill-94/32 : Author(s): A.W.A. Murray, J.L. Watkins and D.G. Bone (United Kingdom)
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Survey estimates of recruitment of toothfish in Subarea 48.3
data used by the Working Group for toothfish assessments in 1999 and later were correct. We found ... , the modal progression of peaks in the length densities corresponding to cohorts assessed by sequential ... consistently determined from the survey data. The expected reduction in cohort density with time at a log-scale ... rate of-0.16 (natural mortality) was evident in only very few cohort plots, even those which were ...
Meeting Document : WG-FSA-SAM-04/16 : Author(s): Collins, M., Wakeford, R.C., Moir-Clark, J., Belchier, M., Agnew, D.J.
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Robust characterisation of the age structure, growth and recruitment of toothfish in the Macquarie Island and Heard Island and McDonald Islands fisheries
, collected during the 2000-2011 fishing seasons in Division 58.5.2 and outside the CCAMLR area at Macquarie ... , as well as allowing more precise estimates of the selectivity of the different fishing gears used in ... the stock assessment in Division 58.5.2 compared to a scenario using only catch at length data. The ... in developing an ageing program. Author(s): D.C. Welsford, S.G. Candy, J.J. Verdouw and J.J ...
Meeting Document : WG-FSA-12/P07 : Author(s): D.C. Welsford, S.G. Candy, J.J. Verdouw and J.J. Hutchins