Search results
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Review of some assumptions for modelling Patagonian toothfish dynamics at CCAMLR Subarea 48.3
Abstract: During the year 2005 meeting of the WG-FSA two different methods for assessing ... Patagonian toothfish stock in CCAMLR Subarea 48.3 were available to the Working Group: CASAL and ASPM (WG-FSA ... -05/16; WG-FSA-05/73). Although the underlying basic age-structure population dynamics models in both ... cases were similar, there were considerable differences in assumptions and implementations of the two ...
Meeting Document : WG-FSA-SAM-06/13 : Author(s): A. Aubone, P.A. Martínez and O.C. Wöhler (Argentina)
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Antarctic sea ice losses drive gains in benthic carbon drawdown
Abstract: Loss of sea-ice, ice shelves and retreat of coastal glaciers around the Antarctic ... Peninsula in the last few years has exposed new open water, allowing large blooms of phytoplankton to ... flourish in the newly exposed coastal areas. This new productivity has important consequences as the ... phytoplankton die and sink to the sea-bed where the carbon is sequestered for thousands of years. This carbon ...
Meeting Document : SC-CAMLR-XXXIV/BG/34 : Author(s): Delegation of the United Kingdom
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Ross Sea fishery research and data collection plan
Abstract: A review of the use and effectiveness of research lines as a data collection and effort ... spreading tool within the Ross Sea exploratory toothfish fishery (CCAMLR statistical Subareas 88.1 and 88.2 ... ) is presented. The increase in the number of vessels in the exploratory fishery in Subareas 88.1 and ... 88.2, combined with the greater number of Small Scale Research Units (SSRUs) and the amount of data ...
Meeting Document : WG-FSA-05/49 : Author(s): J. Fenaughty (New Zealand)
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Acoustic assessment of potential bias in abundance estimates of mackerel icefish from trawl surveys
Abstract: In 2000, CCAMLR asked the Working Group on Fish Stock Assessment (WG-FSA), whether ... trawl surveys are the most reliable and appropriate method to survey stocks of mackerel icefish ... (Champsocephalus gunnari). Recent acoustic data from the South Atlantic suggested that mackerel icefish may not ... always be distributed closely on the sea floor during the day as conventional wisdom would have it, but ...
Meeting Document : WAMI-01/05 : Author(s): E. van Wijk, T. Pauly, A. Constable and R. Williams (Australia)
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A proposal to subdivide CCAMLR Statistical Division 58.4.1 using environmental data
1996 based on the results of an acoustic survey (BROKE) of the southernmost 873,000 km2 of this area ... (CCAMLR 1996). Detailed subsequent analysis of the results of this survey have indicated that Division ... 58.4.1 can be divided into two approximately equal sized subdivisions: 80-115?E and 115-150?E on the ... basis of environmental data. Krill is more abundant in the western subdivision and its biomass is more ...
Meeting Document : WG-EMM-00/30 : Author(s): S. Nicol and T. Pauly (Australia)
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Status of WG-SAM reviews of research plans and research proposals and recommendations for streamlining
Abstract: Part of the remit of WG-SAM includes reviewing and providing advice to WG-FSA and the ... SC on the experimental design of research plans submitted under CM 21-02, and research proposals ... alone. The large volume of papers, lack of consistent format, lack of clear performance review criteria ... , and the lack of time available at the meeting made a meaningful review of each plan infeasible. To ...
Meeting Document : WG-FSA-15/14 : Author(s): Convener of WG-SAM and Chair of the Scientific Committee
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BEACH DEBRIS SURVEY SIGNY ISLAND, SOUTH ORKNEY ISLANDS 1996/97
Abstract: The seventh annual beach debris survey was carried out at Signy Island, South Orkney ... Islands during the 1996/97 austral summer. Debris was cleared each month between December and March from ... three study beaches, Cummings Cove, Foca Cove and Starfish Cove. The debris was counted, measured and ... were found at Starfish Cove. The total amount of marine debris collected from the three beaches was the ...
Meeting Document : CCAMLR-XVI/BG/6 : Author(s): Delegation of the United Kingdom
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Antarctic krill and climate change
on the impact of climate change and increasing fisheries on Antarctic krill and Antarctic ecosystems ... , and possible repercussions for resource management. The workshop was organised by the Institute of ... Marine Resources and Ecosystem Studies (IMARES) in the Netherlands, and funded by the European Commission ... and the Dutch government. The scientific evaluation focused on major agents of climate change, such as ...
Meeting Document : SC-CAMLR-XXX/BG/03 : Author(s): Delegation of the European Union
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Uncertainty in standard sphere calibrations
Abstract: In fisheries acoustics, the standard sphere method of echosounder calibration is most ... commonly used (Johannesson and Mitson, 1983; Simmonds et al., 1984). To investigate the uncertainty in the ... variations in the system gains of 0.3, 0.2 and 1.5 dB, respectively. Additionally, system gain values ... calibrated with the 30.5 mm Cu sphere were consistently lower than those with the 33.2 mm WC sphere. Prompted ...
Meeting Document : WG-EMM-95/70 : Author(s): Demer, D.A., Hewitt, R.P.
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Importance of myctophid fish distributions for formation of foraging areas of chinstrap penguins and Antarctic fur seals at Seal Island
to the incubation and guard period, respectively, for chinstrap penguins; penguins were divided into ... occurred on the shelf north of Seal Island. However, all predators except diurnal foraging penguins went ... northward beyond the shelf, and foraged in offshore region during Leg I and on slope during Leg II. The ... diurnal foraging penguins alone fed on the shelf. The following advantages are considered for feeding in ...
Meeting Document : WG-EMM-95/87 : Author(s): Bengtson, J.L., Kawaguchi, S., Jansen, J.K., Takao, T., Meyer, W.R., Baba, N., Hiruki, L.M., Boveng, P., Cameron, M.F., Ogishima, T., Ichii, T., Naganobu, M.