Résultats de la recherche
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Growth of mackerel icefish (Champsocephalus gunnari) and age-size composition of population in subarea of the South Georgia
represented by fish of two contiguous age groups. It was shown that in the 1980s during a number of years the ... class. These year classes appeared against a background of the intensive icefish fishery, and krill ... important factors now. A comparative analysis of icefish growth in subarea 48.3 based on data collected in ... different periods of fishery revealed a substantial interannual variability. The comparison of the growth ...
Meeting Document : WG-FSA-SAM 03/7 : Auteur(s): K.V. Shust and E.N. Kuznetsova (Russia)
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Antarctic fur seal population dynamics update and assessment of census error at SSSI No. 32, Livingston Island, South Shetlands, Antarctica (2000/2001)
up to date have been single counts and do not allow the calculation of confidence limits, a protocol ... error and pup numbers show a linear trend, however, some outliers (outside the 95%CI) could be ... censuses in a considerable way. These factors should all be assessed and taken into account when ... error, thus supporting the hypothesis that the A. gazella population at SSSI Nº32 is reaching stability ...
Meeting Document : WG-EMM-01/49 : Auteur(s): R. Hucke-Gaete (Chile)
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Relationships between the distribution of whales and Antarctic krill Euphausia superba at South Georgia
examined by comparing sightings and underway acoustic data collected as part of a multidisciplinary ... research cruise during January/February 1998. A total of 222 cetaceans of 10 species was recorded with ... and krill was examined at a number of spatial scales. There was a positive relationship between whale ...
Meeting Document : WG-EMM-99/30 : Auteur(s): K. Reid, A.S. Brierley (United Kingdom) and G.A. Nevitt (USA)
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Notes on the availability of three important finfish species in offshore waters of the lower South Shetland Islands (Subarea 48.1)
collected from a single year, the sample size and regression range available for length-weight relationships ... can be increased. However, the value of these data as a combined singular data set for one year of ... sampling is limited. A future offshore survey coupled with inshore sampling would provide substantially ... more information, and allow a more direct comparison of the two data sets to be realised, particularly ...
Meeting Document : WG-FSA-99/31 : Auteur(s): C.D. Jones (USA), E.R. Barrera-Oro, E.R. Marschoff and R.J. Casaux (Argentina)
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EFFECT OF STERN-SETTING TUNNEL ON THE SINK RATE OF INTEGRATED WEIGHT LONGLINE (IWL)
Abstract: This paper describes a new vessel modification to allow setting of longlines via a ... steel tube, built in to the longliner during a dry-dock refit. The tube angles downwards from where the ... tested in a series of sets using time-depth recorders during current sea-trials and approximately three ...
Meeting Document : WG-FSA-08/38 : Auteur(s): I. Hay and G. Robertson (Australia)
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COMPARISON OF THE BIOMASS OF ANTARCTIC KRILL, (EUPHAUSIA SUPERBA), AROUND THE SOUTH SHETLAND AND SOUTH ORKNEY ISLANDS IN THREE YEARS: 1999, 2000 AND 2008
Abstract: Using a combination of techniques, we examine data from three cruises in 1999, 2000 and ... may be useful in deriving biomass estimates for the South Orkney Islands in 1999. We use a simple ... , and report on the biomass from a survey conducted in 2008. Biomass estimates in 2008 are calculated ... future development of management strategies based on small scale units. Author(s): C. Reiss and A ...
Meeting Document : WG-EMM-08/26 : Auteur(s): C. Reiss and A. Cossio (USA)
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FISHING ACTIVITY AND SEABIRD-VESSEL ATTENDANCE NEAR THE NORTHERN ANTARCTIC PENINSULA
Abstract: We conducted a survey to investigate the factors influencing the number of seabirds ... attending a research vessel during scientific trawling activities near the northern Antarctic Peninsula. Our ... examine seabird-vessel attendance to scientific trawling activities in Antarctic waters where there is a ... conservation actions are met to protect seabirds. Author(s): Jarrod A. Santora and Kimberly S. Dietrich (USA ...
Meeting Document : WG-FSA-08/11 : Auteur(s): Jarrod A. Santora and Kimberly S. Dietrich (USA) and Darci Lombard (Canada)
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CONVENORS’ REPORT OF THE WG-IMAF WORKSHOP
this scope was a part of the broader contribution of CCAMLR to the conservation of these taxa. The key ... reflect a purpose and revised scope of the group; o in the short-medium term WG-IMAF should place a ... particular focus on a reduction in incidental mortality of seabirds associated with fishing in those areas of ...
Meeting Document : WG-FSA-08/65 : Auteur(s): K. Rivera and N. Smith (Co-conveners of ad hoc WG-IMAF)
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Net sample validation of acoustic techniques used to identify and size Antarctic krill
(MVBS) data at 120 and 38 kHz were collected with a Simrad EK500 echo sounder, and net samples were ... frequency data and compared with that obtained in net hauls. This comparison revealed that a simplified bent ... cylinder model was a better predictor of krill length (predicted length = 8.79 + 0.685 observed length, r2 ... = 0.77) than a fluid-filled sphere model. Author(s): Watkins, J.L., Brierley, A.S. Title: Net sample ...
Meeting Document : WG-EMM-97/46 : Auteur(s): Watkins, J.L., Brierley, A.S.
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Climate change and zooplankton dominance in the Antarctic marine ecosystem: implications for the food web
Abstract: There is a growing body of evidence that the climate of the Antarctic Peninsula region ... extensive sea-ice development. These trends potentially will have a major impact on the structure and ... function of the Antarctic marine ecosystem. In the Antarctic Peninsula region winter sea-ice coverage is a ... followed the first prolonged winter sea-ice season in three years and provides a strong contrast to the ...
Meeting Document : WG-EMM-96/21 : Auteur(s): Siegel, V., Fraser, W., Trivelpiece, S., Holm-Hansen, O., Loeb, V., Hewitt, R., Trivelpiece, W.