Resultados de la búsqueda
-
Outline for year 2 of the 3-year longline survey to determine toothfish population connectivity between Subareas 48.2 and 48.4
Abstract: This paper outlines the specific research objectives and plan to achieve them for the ... second year of an agreed 3-year longline survey, in the wider context of connecting the recently ... undertaken surveys in Subarea 48.2 with the established fishery in Subarea 48.4. The overall research ... distributions of benthic bycatch species. This paper reiterates the key points of WG-SAM-17/34, updates ...
Meeting Document : WG-FSA-17/45 : Autor(es): M. Söffker and M. Belchier
-
Shipboard line transect surveys of crabeater seal abundance in the pack-ice off East Antarctica: evaluation of assumptions
Abstract: The extent to which the assumptions underlying line transect sampling are satisfied in ... shipboard surveys of crabeater seals hauled-out on the Antarctic pack-ice is examined. Crabeater seals ... showed little movement in response to the approaching ship. Movement away from the ship by seals close to ... the ship’s track was partially responsible for a relative lack of sightings close to the transect-line ...
Meeting Document : WG-EMM-04/64 : Autor(es): C. Southwell, W. de la Mare (Australia), D. Borchers and L. Burt (United Kingdom)
-
Predicting changes in the Antarctic krill Euphausia superba population at South Georgia
Abstract: Variability in the Southern Ocean is frequently reflected in changes in the abundance ... of Antarctic krill Euphausia superba and subsequent effects on dependent predators. However, the ... length ill the diet of predators at South Georgia from 1991-1997, allowed predictions to be made about ... the abundance and population structure of krill in 1998 and the consequences for predators. Consistent ...
Meeting Document : WG-EMM-99/37 : Autor(es): K. Reid, K.E. Barlow, J.P. Croxall and R.I. Taylor (UnitedKingdom)
-
Relationships of Antarctic krill (Euphausia superba Dana) variability with westerlies fluctuations and ozone depletion in the Antarctic Peninsula area
Abstract: The assessment of environmental processes controlling variability of Antarctic krill ... (Euphausia superba) is an important subject to clarify the Antarctic marine ecosystem. We have assessed ... long-term relationship between Antarctic krill recruitment in the Antarctic Peninsula area and sea ... -level pressure gradients across Drake Passage during 1982-1993. The years with high pressure gradients ...
Meeting Document : WS-AREA 48-98/5 : Autor(es): M. Naganobu, K. Kutsuwada, Y. Sasai and S. Taguchi (Japan)
-
Preliminary results of a feeding trial on the blue-eyed shag Phalacrocorax atriceps
bransfieldensis during 45 days of the austral summer at Jubany Station, King George Island, South Shetland Islands ... . The otoliths identified in pellets were affected by the digestive process and consequently the fish ... gibberifrons and Nototheniops nudifrons all the species were underestimated in number (N. rossii fully). G ... . gibberifrons was also the less affected is size, being Pagothenia bernachii, N. nudifrons, Trematomus newnesi ...
Meeting Document : WG-CEMP-94/29 : Autor(es): R. Casaux, M. Favero, E. Barrera-Oro and P. Silva (Argentina)
-
Potential impacts of climate change on the Southern Ocean ecosystem
Abstract: Global climate change has the potential to disrupt the delicately poised themal balance ... in surface waters of the Southern Ocean around Antarctica, threatening this highly productive system ... with severe and permanant collapse. Pivotal to this process is a diminution of the important (but ... little studied) CO2 sink in the Southern Ocean, resulting in a series of feedback loops accelerating ...
Meeting Document : CCAMLR-VIII/BG/21 : Autor(es): R.G. Chittleborough (Australia)
-
Influence of tag numbers, size of tagged fish, duration of the tagging program, and auxiliary data on bias and precision of an integrated stock assessment
collection, this study investigated how the bias and precision of a CASAL assessment is influenced by various ... aspects of a tagging program, in particular the effects of the numbers of fish tagged, the duration of a ... tagging program, the size of tagged fish, and the type of auxiliary data used in the assessment. The ... numbers were important particularly in the early stages of an exploratory fishery to ensure some ...
Meeting Document : WG-SAM-12/24 : Autor(es): P.E. Ziegler (Australia)
-
Skate tagging in the Heard Island and McDonald Island (Division 58.5.2) toothfish fishery up to 2013
Abstract: The fisheries targeting Patagonian toothfish (Dissostichus eleginoides) and mackerel ... icefish (Champsocephalus gunnari) in the Australian Fishing Zone surrounding Heard Island and McDonald ... bycatches. A tagging program has operated in these fisheries since 2001 to learn more about the movement and ... biology of these species. In the 13 years, over 12,000 skates have been tagged, with 112 recaptures, a ...
Meeting Document : WG-FSA-13/22 : Autor(es): G.B. Nowara, T.D. Lamb and D.C. Welsford (Australia)
-
Research program on resource potential and life cycle of Dissostichus species from the Subarea 88.2 A in 2015–2018
fishing seasons 2015-2018. The present program aims to recapture tagged fishes released during the ... implementation of the previous research program took place in 2010-2012 fishing seasons and investigate resource ... potential and life cycle of Dissostichus species within the eastern part of the Ross Sea over shelf and ... continental slope within the Subarea 88.2 A. The present document is a new edition of the CCAMLR Document WG ...
Meeting Document : WG-FSA-15/27 : Autor(es): Delegation of the Russian Federation
-
By-catch analysis as a part of progress report for the research fishery of Dissostichus spp. in Divisions 58.4.3a and 58.4.4b by Japan and France during 2012/13–2016/17
Abstract: This paper reports the preliminary results of by-catch analysis as a part of progress ... report for the research fishery of Dissostichus spp. in Division 58.4.3a and 58.4.4b by Japan and France ... . Although the by-catch occurred in most longline research operations, the number of by-catch individuals was ... less than 50 individuals in most of the operations. In most of longline operation, by-catch weight was ...
Meeting Document : WG-SAM-17/45 : Autor(es): T. Okuda, A. Rigaud, R. Sinegre and T. Ichii