Search results
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Analysis of krill fishery behaviour in the southwest Atlantic: potential signals for moving fishing activities amongst SSMUs
Abstract: This paper outlines the difference in fishing patterns between regions (Subareas) and ... to move between SSMUs frequently in summer, especially in SSMUs in Subarea 48.1 mostly spending less ... . Vessels move around less frequently in Subarea 48.2 during the summer season because of only one viable ... SSMU, but in autumn, there appear to be some opportunistic fishing on the way to Subarea 48.1 to 48.3 ...
Meeting Document : WG-EMM-07/27 : Author(s): S. Kawaguchi, A. Constable and S. Nicol (Australia)
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Population structure of icefish (Champsocephalus gunnari) in the South Georgia area (Antarctic)
Abstract: The living conditions of Champsocephalus gunnari in the eastern, western shelf areas of ... inhabiting the areas at Shag Rocks and South Georgia is characterized with the lack of fish below 11 cm in ... length and older than 6-7 years (10-11 years in the South Georgia area) and considerably lower number of ... large fish above 40 cm in length in catches. These distinctions are the result of a certain geographic ...
Meeting Document : WG-FSA-04/40 : Author(s): Zh.A. Frolkina and I.A. Trunov (Russia)
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The US commercial krill fishery in Area 48: development, fishing patterns, and decision making
for krill (Euphausia superba) in Area 48 in July, 2000. This fishery has continued and expanded each ... decision making processes involved in harvesting krill by the U.S. fishery. Because the Captain of the Top ... initial basis for decision making. Initial fishing trials in 2000 were conducted in Bransfield Strait and ... north of South Georgia; in 2001, all fishing was conducted off the South Shetland Islands and Bransfield ...
Meeting Document : WG-EMM-02/18 : Author(s): C.D. Jones and M. Hull (USA)
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Entanglement of Antarctic fur seals Arctocephalus gazella in man made debris at Signy Island, South Orkney Islands 1997/98
seals wearing neck collars of man-made debris, half the number reported in 1996/97. All of the animals ... number of fur seals in total that came ashore during the season. Data are compared with results from a ... parallel study undertaken at Bird Island, South Georgia in 1997/98 where the number of reported ... had increased in occurrence since the previous season. The percentage of entanglements in packaging ...
Meeting Document : SC-CAMLR-XVII/BG/12 : Author(s): Delegation of the United Kingdom
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CLIMATICALLY DRIVEN FLUCTUATIONS IN SOUTHERN OCEAN ECOSYSTEMS
role of physical and biological processes in generating fluctuations in the ecosystem around South ... Georgia in the South Atlantic sector of the Southern Ocean. Anomalies in sea surface temperature (SST) in ... changes in SST, and related fluctuations in winter sea ice extent, affect the recruitment and dispersal of ... Antarctic krill. This oceanographically driven variation in krill population dynamics and abundance in turn ...
Meeting Document : WG-EMM-08/P02 : Author(s): E.J. Murphy, P.N. Trathan, J.L. Watkins, K. Reid, M.P. Meredith, J. Forcada, S.E. Thorpe, N.M. Johnston and P. Rothery
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Trophic interactions and population trends of killer whales (Orcinus orca) in the southern Ross Sea
Abstract: Foraging events and related trends in numbers of Type-B and-C killer whales (Orcinus ... Sea killer whales (Type-C; RSKWs), a fishing-eating ecotype, has continued to decrease in a pattern ... coincident with a decrease in the number and size of an important prey: Antarctic toothfish (Dissostichus ... -eating killer whales and large Chinook salmon (Oncorhynchus tshawytscha) in the northeast Pacific. In ...
Meeting Document : WG-FSA-12/P03 : Author(s): D.G. Ainley and G. Ballard
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A preliminary stock assessment in SSRUS 486A, G: A Bayesian and CPUE based biomass dynamic model
contribution to estimate abundance in a simple biomass dynamic model for both species of toothfish in northern ... sets in which both species are present, and thus, an analysis of catch intention was implemented by ... analysed in terms number of tagged and recovered individuals, and tag size-overlap. Catch reported and ... dynamic model in Bayesian framework using standardised CPUE and catches (considering assumed IUU) was ...
Meeting Document : WG-SAM-13/29 : Author(s): R. Wiff, J.C. Quiroz (Chile) and R. Scott (United Kingdom)
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Decadal trends in the South Georgia demersal fish assemblage
research hauls conducted in depths < 350m during 19 research random stratified trawl surveys carried out ... appeared to be linked to habitat type. Low diversity in species was seen consistently over the Shag Rocks ... shelf. There was no detectable change in species composition across the region over three decades. Eight ... species from two families, the Notoheniidae and the Channichthyidae dominated the survey biomass in all ...
Meeting Document : WG-FSA-13/26 : Author(s): M. Belchier (United Kingdom)
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Analysis of krill fishery operations in Subarea 48.1: spatial-time distribution of CPUE and fishing efforts
Abstract: In previous years we revealed that period 2006-2011 is characterized by the highest ... values of standardized CPUE indices in the Subarea 48.1 for the last 25 years. We continue to investigate ... methods. Our investigation shows how fishery operated by years and month in each SSMUs with special ... attention to differences between national fleets. It was shown also significant variability in fishing ...
Meeting Document : WG-EMM-14/21 : Author(s): S. Kasatkina and P. Gasyukov (Russia)
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Growth and shrinkage in Antarctic krill Euphausia superba is sex-dependent
period is critical to their success. Laboratory evidence suggests that krill may shrink in body length ... during this time in response to the low availability of food. Nevertheless, verification that krill can ... shrink in the natural environment is lacking because winter data are difficult to obtain. One of the few ... adult krill (>35 mm total body length) obtained from commercial vessels in the Scotia-Weddell region ...
Meeting Document : WG-EMM-16/P04 : Author(s): G. Tarling, S. Hill, H. Peat, S. Fielding, C. Reiss and A. Atkinson