Resultados de la búsqueda
-
A review of models of Southern Ocean ecosystems: krill, ecosystems and the impacts of harvesting
Abstract: An ecosystem approach for the management of human activities in the Southern Ocean is ... enshrined in the principles of the Commission for the Conservation of Antarctic Marine Living Resources ... (CCAMLR). The implementation of such an approach requires an understanding of the wider dynamics of the ... ecosystem, which is best achieved through the development of ecosystem models. However, not all models will ...
Meeting Document : WG-EMM-04/67 : Autor(es): S.L. Hill, E.J. Murphy, K. Reid, P.N. Trathan (United Kingdom), A. Constable (Australia)
-
An investigation of avoidance by Antarctic krill of RRS James Clark Ross using the Autosub-2 autonomous underwater vehicle
Abstract: The autonomous underwater vehicle (AUV) Autosub-2 was deployed on eight missions ahead ... of RRS James Clark Ross in the northern Weddell Sea and in the Bransfield Strait to assess avoidance ... of the research vessel by Antarctic krill Euphausia superba. The AUV was equipped with the same type ... of scientific echosounder as the research vessel (Simrad EK500 operating at 38 kHz and 120 kHz) and ...
Meeting Document : WG-EMM-01/14 : Autor(es): A.S. Brierley, P.G. Fernandes, M.A. Brandon, E. Armstrong, D.G. Bone and the Autosub Team (United Kingdom)
-
Exploitation of mesoscale oceanographic features by grey-headed albatross Thalassarche chrysostoma in the southern Indian Ocean
association with mesoscale oceanographic features, as identified by sea surface height anomalies, in the ... southern Indian Ocean. During incubation, most birds foraged to the north of the island, at the edges of ... anomalies created by the Agulhas Return Current in the Subtropical Convergence and the Subantarctic zones ... . In contrast, during chick-rearing all tracked birds foraged to the southwest of the island, at the ...
Meeting Document : WG-FSA-01/12 : Autor(es): D.C. Nel, J.R.E. Lutjeharms, E.A. Pakhomov, I.J. Ansorge, P.G. Ryan and N.T.W. Klages (South Africa)
-
Revised proposal for a CCAMLR sponsored research survey to monitor abundance of pre-recruit Antarctic toothfish in the southern Ross Sea
Abstract: At its 2010 meeting, the Scientific Committee agreed that a time series of recruitments ... from a well- designed survey in the Ross Sea could be a useful input into the stock assessment model ... survey was presented to the 2011 meeting of WG-SAM. In this paper we provide an update of the preliminary ... proposal by taking into account the comments of WG-SAM. It provides the scientific rationale and background ...
Meeting Document : WG-FSA-11/47 : Autor(es): S.M. Hanchet, S. Mormede, S.J. Parker and A. Dunn (New Zealand)
-
Swimming speed and allocation of time during the dive cycle of Antarctic fur seals
Abstract: During sustained bouts of diving, predators like fur seals may adjust the time they ... spend diving to maximise the time they can spend foraging and minimise the time spent at the surface ... between dives. To examine this, swimming speeds and the time allocated to different parts of the dive ... than was exhibited by animals when swimming at the surface. Swimming speeds were fastest during the ...
Meeting Document : WG-EMM-95/25 : Autor(es): Bevan, R.M., Boyd, I.L., Reid, K.
-
Climate variability in the western Antarctic peninsula region
Abstract: The climate of tile Western Antarctic Peninsula (WAP) region is distinguished by large ... seasonal and interannual variability and by the occurrence of seasonal sea ice which changes the ocean ... -atmosphere interface, affects tile surface albedo, and modifies the annual temperature cycle. Air temperature ... records for several peninsula stations have been examined, and the annual progression of surface air ...
Meeting Document : WG-EMM-95/61 : Autor(es): Stammerjohn, S.E., Baker, K.S., Smith, R.C.
-
Krill (Euphausia superba) distribution in relation to water movement and phytoplankton distribution off the northern South Shetland Islands
Abstract: The waters in the vicinity of the South Shetland Islands and Elephant Island were ... surveyed to investigate mechanisms for the formation of krill concentrations and to estimate acoustic ... biomass of krill in the 1990/91 austral summer. Main krill concentrations occurred in the shelf waters ... north of the islands, as usual. Tracks of drifting buoys (with curtain drogues at 30 m depth where krill ...
Meeting Document : WG-KRILL-91/22 : Autor(es): Delegation of Japan
-
Further development of the fishery plans
Abstract: The Secretariat has been developing Fishery Plans under the Regulatory Framework ... established by the Scientific Committee and Commission. In recent years, Plans have been drafted for the krill ... /6). Each Fishery Plan draws together the history of management measures and fishery requirements ... agreed by the Commission, as well as key operational information for each fishery. In 2004, the ...
Meeting Document : WG-FSA-SAM-04/04 : Autor(es): Secretariat
-
Quantifying vessel performance in the CCAMLR tagging program: spatially and temporally controlled measures of relative mortality and tag-detection rates
Abstract: A reliable commercial tagging program is critical to the successful management by ... CCAMLR of a number of toothfish fisheries in Antarctica, but the evaluation of tagging performance has ... been thus far inconclusive because the confounding effect of factors such as time and location of ... , by controlling for the spatial and temporal confounding factors using a case-control study design, we ...
Meeting Document : WG-FSA-12/47 Rev. 1 : Autor(es): S. Mormede and A. Dunn (New Zealand)
-
Updated progress report on the research fishery for Dissostichus spp. in Subarea 48.6 being jointly undertaken by Japan and South Africa: 2012/13 and 2013/14
as outlined in CM 41-04 (2012 & 2013) during the 2012/13 fishing season. Progress achieved during ... the 2012/13 season and the first seven months of the 2013/14 season are reported. This paper updates ... and replaces WG-SAM-14/10. Over the first 19 months of the Research fishery a total of 279 ... recaptured. Even though almost 50% of the recaptures are within season the progress in the northern section ...
Meeting Document : WG-FSA-14/67 : Autor(es): R. Leslie (South Africa), K. Taki, T. Ichii (Japan) and S. Somhlaba (South Africa)