Résultats de la recherche
-
Characterisation of the Antarctic polar frontal zone to the north of South Georgia in summer 1994
the northern edge of the Antarctic Circumpolar Current (ACC). In a number of areas the position of the ... also been implicated in the movement and retention of various associated mesoscale features. In this ... but that the PF was essentially in the same position over the southern edge of the Maurice Ewing Bank ... were present to the north of the study area. Immediately to the north of South Georgia, water in the ...
Meeting Document : WG-EMM-97/40 : Auteur(s): Brandon, M.A., Trathan, P.N., Murphy, E.J.
-
Bias in the estimation of krill yield from using a deterministic formulation of the median unexploited spawning biomass
). The krill yield model uses a biased estimate of SB0 with a method for correcting this bias in the ... of SB0 in the krill yield model compared to the unbiased estimate in the generalised yield model. The ... results show that the biased estimate of SB0 results in a biased estimate of the probability of critical ... bias in the krill yield model will result in the catch level, γ, given for a set probability of ...
Meeting Document : WG-EMM-97/45 : Auteur(s): de la Mare, W.K., Constable, A.J.
-
Preliminary results of the three season research surveys of the Spanish FV Tronio in Division 58.4.1
year of the multi-year research survey in the Division 58.4.1, as far as the ice condition allowed, the ... together with a comparative analysis of the three-seasons carried out in this division. A depletion ... experiment has been made in each of the prospected SSRUs. Results in SSRUs 5841H and G are not conclusive ... traces of IUU fishing found in the proposed areas might have great influence in the results. The IEO ...
Meeting Document : WG-SAM-16/40 Rev. 1 : Auteur(s): R. Sarralde, L.J. López-Abellán and S. Barreiro
-
Precautionary spatial protection to facilitate the scientific study of habitats and communities under ice shelves in the context of recent, rapid, regional climate change
collapse; overall, 87% of the Peninsula’s glaciers have retreated in recent decades. Ice shelf collapse ... will lead to the loss of existing marine habitats and the creation of new habitats. In general, fauna ... the possible interactions and the need to study these in the absence of any other human induced ... henceforth remain fixed, even if the ice shelves recede or collapse in the future. Designation of areas under ...
Meeting Document : WG-EMM-12/34 : Auteur(s): P.N Trathan, S.M. Grant (United Kingdom), V. Siegel and K.-H. Kock (Germany)
-
The Role of Fish as Predators of Krill (Euphausia superba) and Other Pelagic Resources in the Southern Ocean
hydro-acoustic biomass estimates conducted in the late 1980’s and the lack of quantitative food ... consumption data in some abundant myctophid species. Major shortcomings of the consumption estimates of ... quantitative winter food studies. However, it is evident from this review that the importance of krill in fish ... diets varies with time and location, and with the suite of prey types available in different regions in ...
Meeting Document : CCAMLR-IWC-WS-08/09 : Auteur(s): Collins, M.A., Williams, R., Agnew, D.J., Kock, K.-H., Belchier, M., Shust, K.V., Welsford, D., Hanchet, S., Pshenichnov, L., Barrera-Oro, E.
-
Further development of pairwise tag detection performance index and its application to the stock assessment of toothfish in the Ross Sea fishery
) could lead to an over-estimate of the stock biomass. In this paper we develop further an index of vessel ... of that assessment. For each vessel in the fishery, every fishing haul from the nominated ‘case ... rule, 75% of all tags released and 83% of tags recaptured were selected for inclusion in the analysis ... approach be used as a data selection method for the stock assessment of toothfish in the Ross Sea region ...
Meeting Document : WG-SAM-13/34 : Auteur(s): S. Mormede (New Zealand)
-
ADDRESSING UNCERTAINTY OVER THE IMPORTANCE OF ANTARCTIC TOOTHFISH AS PREY OF SEALS AND WHALES IN THE SOUTHERN ROSS SEA: A REVIEW
(Dissostichus mawsoni) as prey of top predators in the Ross Sea. We reviewed the literature to assess the ... estimated that the non-breeding portion of the seal population in McMurdo Sound, during spring and summer ... abundance of toothfish in McMurdo Sound appears already to be leading to a decline in the number of foraging ... will lead to dramatic changes in the populations of charismatic megafauna, particularly the seals ...
Meeting Document : WG-EMM-08/22 : Auteur(s): D. Ainley and D. Siniff (USA)
-
Distribution, biomass and abundance of Antarctic krill in the vicinity of Elephant Island during the 1996 austral summer
Abstract: Results from two acoustic and net surveys conducted in the vicinity of Elephant Island ... during the 1996 austral summer indicate very good krill recruitment from spawning in 1994/5. Areas of ... highest since 1992 when the effect of good recruitment from spawning in 1991 was observed. The abundance ... , R.P., Loeb, V. Title: Distribution, biomass and abundance of Antarctic krill in the vicinity of ...
Meeting Document : WG-EMM-96/23 : Auteur(s): Demer, D.A., Hewitt, R.P., Loeb, V.
-
Oceanological factors affecting formation of mackerel icefish aggregations in the South Georgia area during different seasons of the year
Rocks. High level of energy exchange, intensive supply of food allow fish to distribute in the wider ... migrate to the spawning grounds. These migrations occurred in the near-bottom layer. The impulse of the ... amount of accumulated fat affects an individual fish readiness to spawning. Icefish spawning in the ... aggregations in the South Georgia area during different seasons of the year Approval: Approved ...
Meeting Document : WG-FSA-05/76 : Auteur(s): Zh.A. Frolkina (Russia)
-
The winter distribution of Adélie and chinstrap penguins from two breeding colonies in the South Shetland Islands of Antarctica
signal was lost just to the west of the South Sandwich Island group in late July, approximately 1300 km ... chinstrap penguins from two breeding colonies in the South Shetland Islands of Antarctica Approval ... Abstract: Satellite telemetry was used to determine the winter movements and distributions of ... five chinstrap and six Adélie penguins from two breeding colonies in the South Shetland Islands ...
Meeting Document : WG-EMM-02/55 : Auteur(s): S.G. Trivelpiece and W.Z. Trivelpiece (USA)