Search results
-
Environment–krill relations in the South Georgia marine ecosystem
westerly winds (Figure 5), while the M-AT index decreased after the mid-1970s indicating greater ... consistently operated from late summer through to the end of winter (April-May to September-October ... -water temperature at the beginning of the year. How does this system affect krill distribution ... Paper Title: Environment–krill relations in the South Georgia marine ecosystem Abstract ... / Description: Interannual variability in the Southern Ocean ecosystem has long been noted and physical factors ... appear to dominate the dynamics. There are, however, few ecological time series available to assess this ... variability and it is only recently that physical datasets have been generated for the Southern Ocean. In this ...
Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 13–30 : Author(s): Fedoulov, P.P., E. Murphy and K.E. Shulgovsky
-
Results of the CCAMLR Antarctic fish otoliths/scales/bones exchange system
after being embedded in polyester resin (Bedford, 1983). (ii) Notothenia gibberifrons: This species ... the beginning of the 1970s, many studies on age and growth of Antarctic fish have been published. Most of them ... to submission after deadline). Collected 1985, 1986 by VNIRO and AtlantNIRO (USSR). For readers 1-4 see ... Islands. (Data of reader 5 have not been included due to submission after deadline). Collected 1985, 1986 ... Paper Title: Results of the CCAMLR Antarctic fish otoliths/scales/bones exchange system Abstract ... / Description: An exchange system was established among Members of CCAMLR to compare age determinations for the ... same species among different laboratories. Four species were included in the exchange: Notothenia ... rossii, Champsocephalus gunnari, Notothenia gibberifrons and Pleuragramma antarcticum. The level of ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 197–226 : Author(s): Kock, K.-H.
-
A preliminary assessment of age and growth of Antarctic silverfish (Pleuragramma antarcticum) in the Ross Sea, Antarctica
in Antarctic silverfish after about 20 months of freezing (M. Pinkerton, NIWA, pers. comm.), so corrections ... - rent work. Hubold and Tomo (1989) concluded that the opaque zone had formed by the end of sum- mer ... . Consequently, the first opaque zone formed about 0.3 years after the birthday, had a radius of only about 0.1 ... years old; its radius was about 0.6 mm. Because the fish for the current work were sam- pled at the end ... antarcticum) in the Ross Sea, Antarctica Abstract / Description: Antarctic silverfish (Pleuragramma ... antarcticum) were sampled during a trawl survey in the Ross Sea, Antarctica. Biological data, including fish ... otoliths were used to estimate ages and von Bertalanffy growth parameters. The species is relatively slow ... -growing with a moderate longevity; the maximum estimated age was 14.3 years. Von Bertalanffy parameters ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 75–86 : Author(s): Sutton, C.P. and P.L. Horn
-
Estimation of natural mortality for the Patagonian toothfish at Heard and McDonald Islands using catch-at-age and aged mark-recapture data from the main trawl ground
, 2008) with the mark-recapture program beginning in April 1998 also in this ground (Candy et al., 2007 ... 4 as the range of M defined by the ends of the upper dashed line), rep- resenting in percentage terms bounds ... . The fact that the spikes are so strong compared to proportions in these age classes in years after 1999 ... 48.3 by observing fish in tanks for a period after capture. They obtained an estimate of sur- vival ... Paper Title: Estimation of natural mortality for the Patagonian toothfish at Heard and McDonald ... Islands using catch-at-age and aged mark-recapture data from the main trawl ground Abstract / Description ... in integrated assessments via CASAL for the Heard and McDonald Islands (HIMI, Division 58.5.2 ... adopted whereby the relatively long time series of catch-at-age and mark-recapture data from the main ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 29–45 : Author(s): Candy, S.G., D.C. Welsford, T. Lamb, J.J. Verdouw and J.J. Hutchins
-
Precautionary spatial protection to facilitate the scientific study of habitats and communities under ice shelves in the context of recent, rapid, regional climate change
shelves has led to the speeding up of gla- cier flow from inland (iv) by the end of the current century ... that the ben- thic fauna may begin to develop naturally. Such interim protection is consistent with the precau ... (and the area deleted from the list of protected areas) after the interim period has elapsed; however, it may ... 48.1) dur- ing several seasons after 1978/79. All of the finfish fisheries in Subarea 48.1 ... Paper Title: Precautionary spatial protection to facilitate the scientific study of habitats and ... communities under ice shelves in the context of recent, rapid, regional climate change Abstract / Description ... : Recent rapid climate change is now well documented in the Antarctic, particularly in the Antarctic ... Peninsula region. One of the most evident signs of climate change has been ice-shelf collapse; overall, 87 ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 139–151 : Author(s): Trathan, P.N., S.M. Grant, V. Siegel and K.-H. Kock
-
Effects of weather and sea-ice on the reproductive performance of the Adélie penguin at Edmonson Point, Ross Sea
December 2002 and coincided with the beginning of hatching. During this period the mean windchill ... 1), most of which occurred immediately after a major snow and wind storm (Figure 1). In all three ... Paper Title: Effects of weather and sea-ice on the reproductive performance of the Adélie penguin ... at Edmonson Point, Ross Sea Abstract / Description: The breeding biology of the Adélie penguin ... (Pygoscelis adeliae) was studied at Edmonson Point, Victoria Land, during the 1999, 2001 and 2003 breeding ... females were significantly longer than in 1999 and 2001, which in turn delayed the mean departure date of ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 99–109 : Author(s): Olmastroni, S., F. Pezzo, V. Volpi and S. Focardi
-
Experimental evaluation of the effectiveness of weighting regimes in reducing seabird by-catch in the longline toothfish fishery around South Georgia
, attracted to the bait, drowned after becoming caught on longline hooks during line setting. A CCAMLR ... such feeding attempts. At the end of setting, a second count of the birds astern of the vessel was made. Any ... resulted in the streamer line snapping after a few seconds. The remains of the streamer line were quickly ... 9 4 45 7 47 17 14 3 19 2 42 28 23 19 27 40 15 3 8 at End of Setting DIM PRO 40 60 53 63 49 ... Paper Title: Experimental evaluation of the effectiveness of weighting regimes in reducing ... seabird by-catch in the longline toothfish fishery around South Georgia Abstract / Description: A series ... of experiments was carried out in February 1999 at South Georgia (Subarea 48.3) to examine the ... effects of different weighting regimes on the incidental mortality of birds caught on longlines fishing ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 119–131 : Author(s): Agnew, D.J., A.D. Black, J.P. Croxall and G.B. Parkes
-
Significant conservation benefits obtained from the use of a new fishing gear in the Chilean Patagonian toothfish fishery
and weight; and (iii) shows the position of the baited hooks at the end of the hook lines with the position ... and down the line. During the set, this sleeve remains at the upper end of the branch line, but when ... - trated at the end of the branch line, close to the weight. Individual weights were much heavier than ... started using the Chilean longline. After about one week of unsuc- cessful attempts by sperm whales ... Paper Title: Significant conservation benefits obtained from the use of a new fishing gear in the ... Chilean Patagonian toothfish fishery Abstract / Description: A new fishing technique, adapted from the ... artisanal trotline fishery for Patagonian toothfish (Dissostichus eleginoides) in Chile is described. The ... macrocephalus). The performance of this fishing technique with regard to seabird mortality and depredation by ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 79–91 : Author(s): Moreno, C.A., R. Castro, L.J. Mújica and P. Reyes
-
A first step towards modelling the krill–predator dynamics of the Antarctic ecosystem
the end of the 18th century, followed by whales at the start of the 20th century. More recently finfish ... , and by 1830 the fur seal population there had also almost been exter- minated. After this exploitation ... of the Antarctic fur seals, and commencing at the beginning of the 20th cen- tury, large baleen whale species were ... , and humpback whales (Megaptera novaeangliae) until 1962 (though there were some illegal takes after ... Paper Title: A first step towards modelling the krill–predator dynamics of the Antarctic ... ecosystem Abstract / Description: The history of human harvests of seals, whales, fish and krill in the ... Antarctic is summarised briefly, and the central role played by krill emphasised. The background to the ... hypothesis of a krill surplus in the mid-20th century is described, and the information on population and ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 217–277 : Author(s): Mori, M. and D.S. Butterworth
-
Analysis of results from demersal fish surveys at South Georgia, undertaken by the United Kingdom and the USSR, January and February 1990
to Sevastopol at the end of May 1990 and this had left little time in which to prepare for this workshop. He ... daylight although, when time became short, some were made after dark. Catches were sorted into species ... were made during daylight a significant proportion were made after dark. It was suggested ... were on the northern side of the west end of the island, near the shelf break west-southwest ... Paper Title: Analysis of results from demersal fish surveys at South Georgia, undertaken by the ... United Kingdom and the USSR, January and February 1990 Abstract / Description: The report describes ... discussions and analyses of the data from a survey from MV Hill Cove in January 1990 and RV Akademik Knipovich ... hauls interspersed with a few large catches. The small number of large catches cause a disproportionate ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 223–254 : Author(s): (Report of a Joint UK/USSR Workshop, 23 to 27 July 1990)