Search results
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Comparing surface and planimetric area across multiple scales and assessing the impact of different data sources on seabed area estimation in research blocks in the CAMLR Convention Area
the fishable depth range within research blocks showed differences of less than 2%. However, at the ... differences between surface and planimetric areas within fishable depth ranges at the scale of a research ... use of surface area measurement at the grid cell level. Author(s): CCAMLR Secretariat Title ... Abstract: Having accurate surface area estimates of toothfish (Dissostichus spp) habitats is ...
Meeting Document : WG-SAM-15/01 : Author(s): CCAMLR Secretariat
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Length composition, sex ratio, and pre-spawning migration of Dissostichus eleginoides in Subarea 48.3 during 1995
South Georgia (NWSG). In March there was a high proportion of large females at Wshag (72%) but a nearly ... equal proportion of males and females at NWSG. It is suggested that a strong influx of small fish at ... seen at NWSG, although the sex ratio did change in favour of males (60% male by early May). The changes ... at Wshag are hypothesised to be the result of a prespawning migration of sub-adults, especially males ...
Meeting Document : WG-FSA-95/27 Rev. 1 : Author(s): Agnew, D.J.
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Robust characterisation of the age structure, growth and recruitment of toothfish in the Macquarie Island and Heard Island and McDonald Islands fisheries
these fisheries. The inclusion of catch at age data is shown to substantially improve the precision of ... processing at the AAD indicates that initial set up of laboratory equipment and salaries are the main expense ... fishing industry provided funds to conduct high throughput ageing of toothfish otoliths. 5780 otoliths ... , collected during the 2000-2011 fishing seasons in Division 58.5.2 and outside the CCAMLR area at Macquarie ...
Meeting Document : WG-FSA-12/P07 : Author(s): D.C. Welsford, S.G. Candy, J.J. Verdouw and J.J. Hutchins
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Effects of different harvesting strategies on the stock of Antarctic icefish Champsocephalus gunnari around South Georgia
fishing mortality (F0.1, Fmax, 2xFmax),- harvesting contantly at 50%F0.1 with an increase of F 3 or 6 ... years after a good recruitment,- pulse fishing at an interval of 3 years with no fishing in between;- a ... harvesting alternative. In the absence of regular recruit surveys constant fishing at F0.1 is most likely to ... be the most profitable and least risky harvesting strategy at present. The establishment of regular ...
Meeting Document : SC-CAMLR-VIII/BG/47 : Author(s): Delegation of Federal Republic of Germany
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BEACH DEBRIS SURVEYS SOUTH SANDWICH ISLANDS
February 1997. A single opportunistic survey of a west-facing beach (c. 200 m length) at Ollivant Point ... deposition is similar to, but at the lower end of, the range reported from beaches on Signy Island, South ... Orkney Islands during the years 1991-1996. At Ollivant Point 57 items of debris were found, the majority ... (70%) being pieces of driftwood which had probably been in situ for at least several years. Many ...
Meeting Document : CCAMLR-XVI/BG/10 : Author(s): Delegation of the United Kingdom
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On the problem of diurnal migrations of some fish species on the South Georgia shelf (Subarea 48.3)
substantial variations in middle size fry of both species were found at different depth levels during 24-hour ... and within the whole water column at night. However major catches were taken within the limits of the ... Abstract: The results of experiments on the South Georgia Shelf carried out in the period of 1986 ... to 1990 have been presented. Six (6) daily stations were occupied where vertical distribution of fry ...
Meeting Document : WG-FSA-99/64 : Author(s): I.A. Trunov, J.A. Frolkina and M.P. Konstantinova (Russia)
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REVIEW OF CCAMLR ACTIVITIES ON MONITORING MARINE DEBRIS IN THE CONVENTION AREA
associated with seabird colonies and animals contaminated with hydrocarbons at a number of sites, primarily ... debris reported from monitoring sites. Relatively large amounts of fishing items have been reported at ... monitored at Bird Island with the majority of debris items being fishing lines and hooks. A total of 67 ... was oil. The last ten years of data show fluctuation in the occurrence of marine debris at any of the ...
Meeting Document : WG-IMAF-09/08 : Author(s): Secretariat
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Delayed laying and prolonged fasting in Adelie penguins Pygoscelis adeliae
Abstract: Observations of nesting Adélie Penguins (Pygoscelis adeliae) were made at Ardley Island ... a monitoring study for CEMP (CCAMLR 1990) at Ardley Island, there were still high quantities of snow ... during spring 1990 when snow cover was unusually thick at some subcolony sites. Adélie Penguins at these ... sites had to delay egg laying until the snow melted. Maximum length of fasting periods comprising pre ...
Meeting Document : WG-CEMP-94/23 : Author(s): Joachim Ulbricht and Detlev Zippel (Germany)
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Summary of Ross Sea skate tagging programme results
years at liberty shows that some skates survive and recover from being hauled out of depths of around ... probably increases the survival of released animals. Unfortunately, this means that length at release can ... Abstract: Over 9,000 skates have been tagged and released in the Ross Sea over a period of seven ... years, and 47 (0.5%) have been recaptured. The recapture of tagged Amblyraja georgiana after up to four ...
Meeting Document : WG-FSA-06/32 : Author(s): S.L. Ballara, A. Dunn and M.P. Francis (New Zealand)
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Density estimation of Antarctic krill (Euphausia superba) around South Shetland Island and Elephant Island (Subarea 48.1) using two frequencies with 38 and 120 kHz
software for swarm identification) and interval method based on distribution of (a) total krill AT and (b ... Abstract: The density of Antarctic krill swarm inhabiting the Subarea 48.1, which includes the ... Elephant Island peripheries and the west and north of the South Shetland Island, was estimated using an ... ) each transects krill AT. The weighted krill density was estimated to be 4.27 g/m 2 (CV=43.42%) applying ...
Meeting Document : SG-ASAM-2019/03 Rev. 1 : Author(s): S. Choi, S. Chung, I. Han, W. Oh, D. An and K. Lee