Search results
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Effects of different harvesting strategies on the stock of Antarctic icefish Champsocephalus gunnari around South Georgia
Champsocephalus gunnari have been simulated for a period of 30 years. These were- diffierent levels of constant ... have been simulated for a period of 30 years. These were - diffierent levels of constant fishing ... of F 3 or 6 years after a good recruitment,- pulse fishing at an interval of 3 years with no fishing in between ... year class. An increaseof F, however, should not occur before 4 years after a good recruitment ...
Meeting Document : SC-CAMLR-VIII/BG/47 : Author(s): Delegation of Federal Republic of Germany
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UPDATED KRILL RECRUITMENT DATA FOR THE ELEPHANT ISLAND REGION OF THE SOUTH SHETLAND ISLANDS, ANTARCTICA; 2002-2008
derived from the CMIX procedure, and were also derived as a proportion of the <30 mm length class ... , with low recruitment occurring during the intervening years. Significant differences in the proportional ... recruitment indices occurred between legs within years indicative of the changing pattern of krill within ... the CMIX procedure, and were also derived as a proportion of the <30 mm length class for day and night ...
Meeting Document : WG-EMM-08/41 : Author(s): C. Reiss (USA)
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Revised estimates of seabed areas within the 500 m isobath of the South Orkney Islands (Subarea 48.2) and consequences for standing stock biomass estimates of nine species of finfish
increased from 5%-30% for eight species and decreased 20% for one. Author(s): C.D. Jones (USA) Title ... estimates are about 1,424 (20%) nautical miles larger in area within the 50-500 m isobaths than Everson’s ... 1,424 (20%) nautical miles larger in area within the 50-500 m isobaths than Everson’s estimates, though ... estimated biomass. Of the nine species examined, the point estimate of total biomass increased from 5%-30 ...
Meeting Document : WG-FSA-99/33 : Author(s): C.D. Jones (USA)
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Pursuit of polynyas in the Antarctic peninsula area
observations. A typical polynya existed off the tip of the Peninsula in 1987 and 1991. In the such years, sea ... ice cover developed extensively. Inversely, the years of the narrow sea ice cover were 1988, 1989,1990 ... and 1993. In the such years, polynyas did not existed. The typical polynya (nearly 500 x 200 km) in 1987 ... was pursed from beginning on August 1 to end on October 20. The shape of the polynya changed remarkably ...
Meeting Document : WG-EMM-97/69 : Author(s): Kimura, N., Shibazaki, K., Matsumura, S., Naganobu, M., Okada, Y.
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Evaluation on the performance of echosounder on a fishing vessel using maximum seabed backscattering
and 2018) collected at a relatively fixed location with bottom depth around 200 m were used to evaluate ... analysis indicated that there was no significant difference among years at both frequencies. Author ... vessel to estimate Antarctic krill biomass. Acoustic data from three surveys (2015, 2016 and 2018 ... indicated that there was no significant difference among years at both frequencies. ...
Meeting Document : SG-ASAM-18/06 : Author(s): X. Wang, X. Yu and X. Zhao
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Assessment of the Patagonian Toothfish (D. eleginoides) in Subarea 48.3
years with 50% probability, with less than 1% probability declining below 20% of B0 and would therefore ... that the current status of the stock is at 52% of B0. Spawning biomass has been increasing in recent years ... . The 2008 year class is estimated to be well above average. Provisional projections indicate that a catch ... status of the stock is at 52% of B0. Spawning biomass has been increasing in recent years. The 2008 year ...
Meeting Document : WG-FSA-15/59 : Author(s): T. Earl, M. Soeffker and C. Darby (United Kingdom)
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Report on fish by-catch on exploratory fishing in Divisions 58.4.1 and 58.4.2
undertaken in Divisions 58.4.1 and 58.4.2 during the 2012 to 2018 seasons. Fish by-catch comprised 14 species ... or groups of species. In 2018, by-catch represented 12% of the total catch (43 tonnes over 307 tonnes ... where Macrourus CPUE also increased in the last 3 years. Macrourus CPUE was 23kg/1000 hooks in average ... in Divisions 58.4.1 and 58.4.2 during the 2012 to 2018 seasons. Fish by-catch comprised 14 species or groups ...
Meeting Document : WG-FSA-18/28 : Author(s): C. Péron, P. Yates, D. Maschette, C. Chazeau, P. Ziegler, D. Welsford, N. Gasco and G. Duhamel
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Continuation of multi-Member research on the Dissostichus eleginoides exploratory fishery in 2018/19 in Division 58.4.3a by France and Japan
their exploratory fisheries in Division 58.4.3a over the coming years in order to contribute to the tagging program ... exploratory fishery in 2018/19 in Division 58.4.3a by France and Japan Approval: Approved Secretariat ... to continue their exploratory fisheries in Division 58.4.3a over the coming years in order to contribute ... Continuation of multi-Member research on the Dissostichus eleginoides exploratory fishery in 2018 ...
Meeting Document : WG-SAM-18/08 : Author(s): Delegations of France and Japan
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A survey of fish stocks in the Heard Island and McDonald Islands region in the 1999/2000 season and a comparison of the abundances of selected species with those obtained in previous surveys
, varying by a factor of 2-3 between years, but C. gunnari abundance can vary by a factor of about 20 ... years, but C. gunnari abundance can vary by a factor of about 20 between years. This is the result ... between years. This is the result of occasional strong year classes entering the fishery and dominating ... the population for about 2 years before disappearing, as has been documented in other locations. Author ...
Meeting Document : WG-FSA-00/40 : Author(s): R. Williams, A. Constable, T. Lamb and E. van Wijk (Australia)
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The direct impact of fishing and fishery-related activities on marine life in the CCAMLR Convention Area with particular emphasis on longline fishing and its impact on albatrosses and petrels – a review
Abstract: Finfishing started in the Southern Ocean more than 30 years ago at South Georgia ... probably only a few animals per year. Author(s): Delegation of Germany Title: The direct impact ... Finfishing started in the Southern Ocean more than 30 years ago at South Georgia and Iles Kerguelen ... birds these effects have been minor, very local and killed probably only a few animals per year. ...
Meeting Document : SC-CAMLR-XIX/BG/11 : Author(s): Delegation of Germany