Search results
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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 : Author(s): D. Agnew, T. Daw, M. Purves and G. Pilling (United Kingdom)
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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 : Author(s): S.M. Kasatkina (Russia)
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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 : Author(s): D.C. Welsford (Australia)
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Estimation of krill (Euphausia superba) mortality and production rate in the Antarctic peninsula region
Peninsula from 26 December 1989 to 14 January 1990. Results were compared with data of an identical survey ... exceeded a factor of 35 times, while interannual variability between available surveys reached only a ... factor of 1.6 times. Krill mortality was calculated by linearized catch curve analysis and resulted a ... rate of Z=0.88 (1989/90) and Z=0.96 (1987/88). Production was estimated and resulted a P/B ratio of ...
Meeting Document : WG-KRILL-91/15 : Author(s): Delegation of Germany
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On interim distribution of the trigger level in the fishery for Euphausia superba in statistical Subareas 48.1, 48.2, 48.3 and 48.4
Abstract: This text is revised version of earlier presented by Ukraine document WG-EMM-16/56 ... . Taking into account the current state of krill fishery in Area 48 and other important factors, Ukraine ... proposes to upgrade the Conservation Measure 51-07 in order to redistribute the trigger level of catch in ... 620 000 tonnes between Subareas in Area 48 in a new percentage limits. This revision of CM 51-07 ...
Meeting Document : CCAMLR-XXXV/30 : Author(s): Delegation of Ukraine
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Preliminary tag-recapture based population assessment of Antarctic toothfish in Subarea 48.4
Abstract: The stock of Antarctic toothfish (D. mawsoni) in CCAMLR subarea 48.4 is estimated from ... tagging returns to be 982 tonnes in 2018. Applying the CCAMLR agreed precautionary assumption of average ... biomass across the time series and harvest rate of γ = 0.038, implies a 2018/19 yield of 37 tonnes ... the 48.4 Antarctic toothfish as a separate stock. Based on the biological characteristics of the ...
Meeting Document : WG-FSA-18/26 : Author(s): T. Earl and A. Riley
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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 : Author(s): M. Naganobu and K. Segawa (Japan)
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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 : Author(s): R.W. Leslie and B.P. Watkins (South Africa)
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Integrated analysis of the by-catch data in the Ross Sea toothfish fishery
Abstract: The indices of exploratory toothfish fishery in the Ross Sea for the period of 2008 ... hooks) and normalized target catch ratio. There was evidence of distinct differences in the mean (and ... the flag States, should be considered as the primary cause of the observed variability in the ... target catch ratio in the Ross Sea. The observed influence of the longline gear types (Autoline ...
Meeting Document : WG-FSA-16/13 Rev. 1 : Author(s): S. Kasatkina
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Revised proposal for continuation of a multi-member longline survey on Antarctic toothfish (Dissostichus mawsoni) in Statistical Subarea 48.6 in 2019/20 by Japan, South Africa and Spain
assessments of the Antarctic toothfish (Dissostichus mawsoni) stock in this subarea (FSA-18/34). The ... continuation of the three-member research proposal for 2019/20 season is presented to ensure continuity of ... demographic parameters of D. mawsoni using trotline (JPN and ZAF) and Spanish longline (ESP) gears ... , established tagging techniques, pop-up tags and genetic analysis will provide the basis for the development of ...
Meeting Document : WG-FSA-2019/23 Rev. 1 : Author(s): Delegations of Japan, South Africa and Spain