Résultats de la recherche

1. Integrated models for Antarctic krill (Euphausia superba) using survey data from 1981–2014 in Subarea 48.1

   of Antarctic krill in Subarea 48.1 based on different aggregations of the data are described to ... data collected from 1981 to 2014 near the Antarctic Peninsula. Four models of the population dynamics ... illustrate the capabilities of the framework. Survey data collected by Germany (RMT8 net sampling from 1981 ... , and hydroacoustic data arranged in different temporal groupings (annual, summer-winter, monthly). The ...

   Meeting Document : WG-SAM-14/20 : Auteur(s): D. Kinzey, G.M. Watters and C.S. Reiss (USA)

2. Sea-surface temperature and krill catches around South Georgia in December–February 1989–1991 and 1999–2001

   further analysis of SST maps, provides continuous information on hydrological conditions in the area ... conducting a krill fishery in the area during the entire year. The reliability of these forecasts could be ... in the area. The total catch of krill was 81 369 tonnes in 1989/90 and 123 562 tonnes in 1990/91 ... considerable decrease in mean SST off South Georgia. This observation is especially obvious for the northern ... in waters off South Georgia. Thus, in 1990/91 the mean December–February value of the SST anomaly ... of SST maps, provides continuous information on hydrological conditions in the area. Analyses of ... conducting a krill fi shery in the area during the entire year. The reliability of these forecasts could be ... fi shing activities in the area. The total catch of krill was 81 369 tonnes in 1989/90 and 123 562 ...

   Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 165–174 : Auteur(s): Vanyushin, G.P

3. Cruise Report – Research Project: Demersal finfish distribution, abundance, and their biological characteristics in Statistical Subareas 48.1 (northern area) and 48.2

   ). As a result of nearing the maximum research catch specified in Subarea 48.1 (95% of authorized ... proposed stations completed (n=13). In Subarea 48.2, we were unable to complete the planned number of ... contribute to knowledge regarding bathymetry and distribution of the concentrations of fish and krill in the ... marks registered in the echo sounders. One of the mid-water hauls identified a shoal of icefish (33.6 t ...

   Meeting Document : WG-SAM-18/25 : Auteur(s): Delegation of Chile

4. DISTRIBUTION AND BIOLOGY ON ANTARCTIC KING CRAB PARALOMIS FORMOSA CAUGHT AS BYCATCH IN FISHERY FOR TOOTHFISH (DISSOSTICHUS ELEGINOIDES) ON PATAGONIAN CONTINENTAL SLOPE

   exclusive (marine) economic zones of the foreign states (FAO statistical area 41) in the period from ... data on the distribution of crabs in area of toothfish fishery on the Patagonian continental slope were ... Abstract:  Scientific observation was conducted in the commercial trip on the long-liner " ... ;Simeiz", operating under the Ukrainian flag, in the south-western Atlantic Ocean outside the ...

   Meeting Document : WG-FSA-09/30 : Auteur(s): Yu.V. Korzun (Ukraine)

5. Uncertainty in standard sphere calibrations

   Abstract:  In fisheries acoustics, the standard sphere method of echosounder calibration is most ... variations in the system gains of 0.3, 0.2 and 1.5 dB, respectively. Additionally, system gain values ... commonly used (Johannesson and Mitson, 1983; Simmonds et al., 1984). To investigate the uncertainty in the ... method, a series of experiments were conducted in a deep tank (Demer and Hewitt, 1993). Results indicated ...

   Meeting Document : WG-EMM-95/70 : Auteur(s): Demer, D.A., Hewitt, R.P.

6. Physical and behavioural influences on larval fish retention: contrasting patterns in two Antarctic fishes

   retention of the planktonic stages (eggs and larvae) of marine fish can play a key role in the maintenance ... grounds may contribute to the failure of the N. rossii population to recover from its collapse in the ... consistent feature in C. gunnari was a lack of larval exchange between the proximate South Georgia and Shag ... Abstract:  Waters around South Georgia are amongst the most productive in the Southern Ocean, and ...

   Meeting Document : WG-FSA-12/P10 : Auteur(s): E.F. Young, J. Rock, M.P. Meredith, M. Belchier, E.J. Murphy and G.R. Carvalho

7. Oceanic condition and zooplankton distribution/ abundance in Bransfield Strait during austral summer 1989/1990

   south of Deception Island, and meanders northeastward in the surface layer of the northern strait ... occupying 20 stations, and showed the highest biomass in zooplankton community. The highest number of salpa ... was shown in the northeastern entrance of Bransfield Strait, but low numbers were found along the ... to hydrographic condition, a total of 29 sampling stations was occupied for the CTD casts and ...

   Meeting Document : WG-KRILL-91/14 : Auteur(s): S.M. Kim and M.S. Suk (Korea)

8. Krill aggregation characteristics: spatial distribution patterns from hydroacoustic observations. Polar Biology (in press)

   is consistent with the absence of pronounced hydrographic or topographic concentrating mechanisms in ... scale of I km, suggesting that they could have been in the process of fragmenting or amalgamating ... that these could be useful in the development of fisheries-dependent indices of krill abundance. Polar ... biomass was log-normally distributed with a mean of 0.18 t. Only 3% of the aggregations were heavier than ...

   Meeting Document : WS-KCPUE-89/11 : Auteur(s): D.G.M. Miller and I. Hampton (South Africa)

9. Are penguins and seals in competition for Antarctic krill at South Georgia?

   consumers of Antarctic krill. In recent years the population of fur seals has increased whereas that of ... greater competition for the prey of macaroni penguins leading to the decline in their population. We use a ... 1989 and 2000. Foraging ranges of the two species showed considerable overlap in both years but the ... prevalence of krill in the diet of the two predators differed with less krill in the diet of macaroni ...

   Meeting Document : WG-EMM-01/22 : Auteur(s): K.E. Barlow, I.L. Boyd, J.P. Croxall, I.J. Staniland, K. Reid and A.S. Brierley (United Kingdom)

10. 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 ... °C over the next 100 years could lead to more than a 95% reduction in the biomass and abundance of ...

    Meeting Document : WG-EMM-08/P02 : Auteur(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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