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Natural mortality rate in the mackerel icefish (Champsocephalus gunnari) around South Georgia
Paper Title: Natural mortality rate in the mackerel icefish (Champsocephalus gunnari) around ... careful consideration of the data and available methods, several errors are noted in earlier estimates ... progressively, and significantly, lower than in the earliest years. This pattern is followed in the Heincke ... to compare the numbers at age in successive years and thus derive an estimate of the mortality of a ... Dorovskikh (1991), there appeared to be a major decline in mean survivorship in successive years (Figure 2 ... has been responsible for the increase in the latter years. Yet again a further note of caution is ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 245–257 : Autor(es): Everson, I
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Schedule of Conservation Measures in Force 1998/1999
shall measure one series of 20 meshes, selected in accordance with Article 3, inserting the gauge ... mesh size in accordance with Article 5 when using a weight or dynamometer, one series of 20 meshes only ... ) This schedule lists Conservation Measures adopted by the Commission in accordance with Article IX of ... their Flag Vessels Operating in the Convention Area ......................... 20 CONSERVATION MEASURE ...
Document : Site Section: Publications
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On the presence of Paralomis spinosissima and Paralomis formosa in catches taken during the Spanish survey Antártida 8611
seven hauls of the 29 made around Shag Rocks and in 20 of the 104 hauls made at South Georgia. P ... Paper Title: On the presence of Paralomis spinosissima and Paralomis formosa in catches taken ... the archipelagos in the Scotia Sea. A total of 345 hauls was conducted, of which 29 took place around ... m. In the whole of the area surveyed, the two crab species of the genus Paralomis (P. spinosissima ... . spinosissima was caught in seven hauls of the 29 made around Shag Rocks and in 20 of the 104 hauls made at ... . Tows were 30 minutes in duration and the vessel speed was three knots. The trawl used for sampling ... , occurring in seven of the 29 hauls (24.14%) carried out around Shag Rocks and in 20 of the 104 (19.23 ... 30% sand and the remainder gravel. However, the presence of certain species of invertebrates in ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 165–173 : Autor(es): López Abellán, L.J. and E. Balguerías
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Significant intra-annual variability in krill distribution and abundance at South Georgia revealed by multiple acoustic surveys during 2000/01
observations from previous years, krill density in the western box in the mid-season survey was less than that ... March 2001 (late-season). The surveys were the first in a newly planned five-year series of observations ... Paper Title: Significant intra-annual variability in krill distribution and abundance at South ... acoustic surveys of Antarctic krill (Euphausia superba) were conducted around South Georgia in the 2000/01 ... - season (to 34.7 g m-2). In a pattern that is consistent with observations from previous years, krill ... 2004/05. Surveys in previous years have generally been restricted to a single, month-long period in ... temporally. No more ship time was available than in previous years and so survey effort had to be reduced ... results of surveys conducted in the fi rst year (2000/01) of the new series, commenting additionally on ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 71–82 : Autor(es): Brierley, A.S., C. Goss, S.A. Grant, J.L. Watkins, K. Reid, M. Belchier, I. Everson, M.J. Jessop, V. Afanasyev and J. Robst
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Precautionary spatial protection to facilitate the scientific study of habitats and communities under ice shelves in the context of recent, rapid, regional climate change
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 ... % of the Peninsula’s glaciers have retreated in recent decades. Further ice-shelf collapse will lead to ... the loss of existing marine habitats and to the creation of new habitats, with consequent changes in ... volume of deep water in Pine Island Bay has increased in recent years. Faster basal melting under the ... coastal glaciers around the Antarctic Peninsula in the last 50 years has exposed at least 2.4 × 104 km2 ... to a reduction of almost 25% in the ice shelf in just two years. Similarly, the area of the Larsen ... ) should receive long-term protection for scientific study in accordance with Article IX.2(g) of the ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 139–151 : Autor(es): Trathan, P.N., S.M. Grant, V. Siegel and K.-H. Kock
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A functional division of Electrona carlsbergi (Tåning, 1932) area of habitat in relation to the latitudinal zonation of the Southern Ocean
Southern Atlantic along two meridional transects at 17° and 20°W in the latitudes from 37°30' to 55°30 ... Paper Title: A functional division of Electrona carlsbergi (Tåning, 1932) area of habitat in ... the RV Vozrozhdenie (VNIRO, USSR) in March/April 1990 an integrated study survey was conducted in the ... of E. carlsbergi were analysed by length composition, sex ratio and maturity stages in relation to ... transects at 17° and 200W in the latitudes from 37°30' to 55°30'S. The survey was mainly focussed on ... fishing grounds and target species in recent years has opened up great opportunities for exploiting ... in the latitudinal band between 37°30' and 55°30'S. The choice of these two meridians was dictated ... between stations on the transects was 30 miles (each 30' of latitude and longitude in the small-scale ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 369–395 : Autor(es): Zemsky, A.V. and S.A. Zozulya
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Analysis of the diet of Champsocephalus gunnari at South Georgia in late summer from 1994 to 1997, Dr Eduardo L. Holmberg surveys
and Thysanoessa sp., which are known to be important alternative food in years of krill scarcity, as ... years of krill scarcity), intermediate in 1995 (below years of historically high abundance), and high in ... 1996 and 1997 (in line with years of high krill abundance). This information is well in accord with ... /without food in Subarea 48.3, did not show a consistent pattern from year to year. Likewise, in the four ... fish (ranges 12-20 cm/l-2 years) was found in the catches during the RV Dr Eduardo L. Holmberg ... 30 years, even lower than in 1977/78 and 1991, years of krill 'shortage' (Figures 2 and 3) (Kock et ... four years, while krill biomass densities were comparable with those in the previous year and were ... important alternative food in years of krill scarcity, as well as fish, was only occasional or negligible ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 103–123 : Autor(es): Barrera-Oro, E., R. Casaux and E. Marschoff
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Demonstrating global leadership in marine spatial protection
Members will work together over the next 14 months to ensure that it is met. Author(s): Submitted by ... Protected Areas at the Institut Paul Emile Victor (IPEV) in Brest, France was held with this imminent ... deadline in mind. While there were many positive outcomes from the workshop, significant work remains to be ... done in a short time. Fortunately, as the report of the workshop recognizes, experience demonstrates ...
Meeting Document : CCAMLR-XXX/BG/20 : Autor(es): Submitted by ASOC
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Assessment of Patagonian toothfish (Dissostichus eleginoides) in Subarea 48.4
tonnes in 2019/20 and 2020/21 is consistent with the application of the CCAMLR harvest control rule ... fits. Stock projections indicate that the stock was at 67% of B 0 in 2018/19 and that a yield of 27 ... . eleginoides) in Subarea 48.4. The assessment data are updated with the observations for the 2017/18 season and ... the data weighting method revised to be consistent with those applied in other CCAMLR assessment model ...
Meeting Document : WG-FSA-2019/29 : Autor(es): T. Earl and E. MacLeod
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Assessment and tag program adaption methods for exploratory fisheries in the CAMLR Convention Area: an example application for Division 58.4.3a
tagging levels that will produce an expected abundance estimate in the following year of a given precision ... Paper Title: Assessment and tag program adaption methods for exploratory fisheries in the CAMLR ... exploratory stocks in the CAMLR Convention Area. The assessment methodology is designed to be able to ... abundance estimator, is defined whereby catch limits and tagging rates can be adjusted together to define ... ), not its status relative to 20% of K in the final year of projection. One might then expect that ... (right) fleets. In years with no catches these will obviously be zero, and 2007 total harvest rate is ... between a 5 and 10% error, but the 20% CV yielded a significant decrease in the catch limit set (nearly ... depletion rule is concerned with the propor- tion of time the stock spends below 20% of K (in this case ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 101–113 : Autor(es): Hillary, R.M