Resultados de la búsqueda
-
Interannual variability of polynya extent in the Antarctic Ocean
Abstract: There are two general kinds of polynya (an ice-free area within sea ice borders ... processes by exposing the surface of ocean to the atmosphere. Additionally, we think that the coastal ... reports on the place, time and shape of the coastal polynyas. Accordingly, we pursued the transition of ... the coastal polynyas using satellite image data of sea ice concentrations by the NSIDC (National Snow ...
Meeting Document : WG-EMM-01/34 : Autor(es): M. Naganobu and K. Segawa (Japan)
-
Trawl survey of the Patagonian toothfish (Dissostichus eleginoides) resource off the Prince Edward Islands
Abstract: A bottom trawl survey was conducted in the northern half of the South African EEZ ... around the Prince Edward Islands in April 2001. Due to the paucity of bathymetric data, it was not ... study to ascertain the feasibility of conducting future trawl surveys, and to collect relevant data to ... aid in the design of such surveys should they be deemed practical. The maximum operating depth for the ...
Meeting Document : WG-FSA-01/72 : Autor(es): R.W. Leslie and B.P. Watkins (South Africa)
-
Fishing for toothfish using pots: results of trials undertaken around South Georgia, March–May 2000
Abstract: During the period March to May 2000, the UK undertook trials of a pot fishing method to ... trial, the results, and discusses the commercial viability of this fishing method for toothfish ... of crab species. The catch rate of toothfish was notably lower than that achieved in the longline ... fishery. Importantly, the use of pots eliminated bird bycatch. To capitalise on this feature, there is a ...
Meeting Document : WG-FSA-00/23 : Autor(es): D. Agnew, T. Daw, M. Purves and G. Pilling (United Kingdom)
-
Catchability of midwater trawls in relation to krill fishery
estimation of total krill lengths distribution, obtained on the basis of trawl samples from different catched ... total distribution of krill length, obtained using weighting of trawl samples (usually 200 ind.) against ... the catch, may considerably differ (statistically significantly) from that calculated on the basis of ... trawling. The example of trawl samples processing for the study area off Elephant Island is presented ...
Meeting Document : WG-EMM-98/20 : Autor(es): S.M. Kasatkina (Russia)
-
Trends in relative abundance of fjord Notothenia rossii, Gobionotothen gibberifrons and Notothenia coriiceps in trammel net catches at Potter Cove, South Shetland Islands
Abstract: A monitoring program of demersal fish in inshore sites of the South Shetland Islands ... has continued in Potter Cove from 1991 to 1998, covering a continuous sampling period of 15 years and ... in Harmony Cove, Nelson Island, in the austral summer 1995/96. The decline in trammel net catches of ... fjord fishes of the species Notothenia rossii and Gobionotothen gibberifrons in relation to the non ...
Meeting Document : WG-FSA-98/57 : Autor(es): E. Barrera-Oro, E.R. Marschoff and R.J. Casaux (Argentina)
-
30 years of krill fisheries management – challenges remain
frequently. The reproduction and survival of krill are significantly affected by sea ice cover. This is of ... concern since key spawning, recruitment and nursery areas of krill are located in the Southwest Atlantic ... sector, an area that has been warming rapidly, resulting in a reduction in the extent and duration of ... establishment of CM 51-07 – distributing the trigger limit among statistical subareas – was a step in the right ...
Meeting Document : CCAMLR-XXX/BG/19 : Autor(es): Submitted by ASOC
-
Data from recent trawl surveys in the vicinity of Heard Island and McDonald Islands (Division 58.5.2), reveal an unusual cohort structure in the mackerel icefish (Champsocephalus gunnari) population
Abstract: Surveys of mackerel icefish, Champsocephalus gunnari, was undertaken in Division 58.5.2 ... in the vicinity of Heard Island during September 2010 and April 2011, to provide information on the ... population dynamics of this species, and to provide a basis for an assessment of short-term annual yield in ... the 2011/2012 CCAMLR season. This paper provides a preliminary assessment of yield for the area of ...
Meeting Document : WG-FSA-11/22 : Autor(es): D.C. Welsford (Australia)
-
Results from the random stratified trawl surveys to estimate distribution and abundance of Dissostichus eleginoides and Champsocephalus gunnari in the Heard Island region (Division 58.5.2) for 2010 and 2011
2011 on the RV Southern Champion, adding to the time series of annual surveys in Division 58.5.2 that ... information on abundance. Catches of D. eleginoides were at half or lower than in surveys from both years than ... the average catch for the previous four years (2006-2009). Catches of C. gunnari were very low, with ... the 2011 catch, at less than 0.5 t, 15% of the earlier four year average, and the 2010 catch being 60 ...
Meeting Document : WG-FSA-11/23 : Autor(es): G.B. Nowara, S.G. Candy and T. Lamb (Australia)
-
DEPREDATION AROUND SOUTH GEORGIA AND THE IMPLICATIONS ON STOCK ASSESSMENT OF D. ELEGINOIDES
levels of depredation caused by killer whales (Orcinus orca) and sperm whales (Physeter macrocaphalus ... ) around South Georgia. Since 2003 cetaceans have been observed on 3000 out of 14644 observed lines (20.5 ... examined and varied from 0.9% to 5.8% of the TAC per year over the time period. Additional work was also ... conducted which looked at the behaviour of cetaceans around fishing vessels in the area. To aid ...
Meeting Document : WG-FSA-09/16 : Autor(es): J. Moir Clark, D.A. Agnew, P. McCarthy and M. Unwin (United Kingdom)
-
ACCURACY OF BENTHIC INVERTEBRATE BY-CATCH IDENTIFICATION BY OBSERVERS OPERATING IN THE HEARD ISLAND AND MCDONALD ISLANDS PATAGONIAN TOOTHFISH LONGLINE FISHERY
Abstract: As a means of testing the accuracy of observer identifications and to provide ... Antarctic Division (AAD). Observers displayed a high level of accuracy (89%) in the identification of ... longline invertebrate by-catch. Common taxonomic errors included the misclassification of stylasterids ... training in the classification of cnidarians (stony corals, soft corals and stylasterids) and coral-like ...
Meeting Document : WG-FSA-09/23 : Autor(es): T. Hibberd (Australia)