Search results
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Pygoscelid penguins vulnerabilities to spatio-temporal changes of the krill fisheries in the Antarctic Peninsula
Abstract: Fast climate changes in the Antarctic Peninsula are reducing krill density, which, by ... its turn, is reflected in penguin population dynamics. The increased concentration of fishing ... activities in this area in the last two to three decades is believed to have feedbacked the impacts of ... penguin population monitoring to test this assumption. We found that fisheries in Antarctic Peninsula are ...
Meeting Document : WG-EMM-2019/10 : Author(s): L. Krüger, F. Santacruz, L. Rebolledo and C. Cárdenas
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A brief characterisation of Patagonian toothfish tag survival and tag detection in CCAMLR Statistical Area 48.3
Abstract: Mark-recapture data is a central element in the assessment of population size and ... growth and the stock assessment for Patagonian Toothfish (Dissostichus eleginoides) in CCAMLR subarea ... 48.3 relies on accurate tagging samples for its assessment. The bias in tagging survival and tag ... detection is assumed to be minimal in the model, but this assumption has not previously been tested; a ...
Meeting Document : WG-FSA-13/29 : Author(s): M. Soeffker and R. Scott (United Kingdom)
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Preliminary assessment of mackerel icefish (Champsocephalus gunnari) for the Heard Island Plateau region (Division 58.5.2) based on a survey in June 2005
Abstract: A survey of Mackerel Icefish, Champsocephalus gunnari,was undertaken in Division 58.5.2 ... in the vicinity of Heard Island in June 2005 to provide the information for an assessment of short ... -term annual yield in the 2005/2006 CCAMLR season. This paper provides a preliminary assessment of yield ... using the assessment methods of CCAMLR. It is proposed that a one-year projection be used in the ...
Meeting Document : WG-FSA-05/39 : Author(s): A.J. Constable, T. Lamb and R. Williams (Australia)
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A TIME FOR ACTION IN THE MANAGEMENT OF ANTARCTIC KRILL FISHERIES
Abstract: In this paper, ASOC draws CCAMLR’s attention to the most pressing issues in relation to ... address key scientific uncertainties at the SSMU level in Area 48, and the consideration of feedback ... management approaches in this Area as soon as possible. In addition, ASOC maintains that CCAMLR should take ... precautionary measures to prevent concentration of catches in coastal areas as the fishery approaches the ...
Meeting Document : CCAMLR-XXVII/BG/24 : Author(s): Submitted by ASOC
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On assessing the size of the humped rockcod stock (Notothenia gibberifrons) in Subarea 48.3
Abstract: An adaptive approach was used to assess the Notothenia gibberifrons stock in Area 48.3 ... approach in this case involved using a target function in the form of the sum of square deviations in ... logarithms of observed and calculated biomass indices and resulted in an estimate of from 21.5 to 42.1 ... thousand tonnes for N. gibberifrons biomass in the 1989/90 season. It is thus possible to suggest a TAC of ...
Meeting Document : WG-FSA-91/26 : Author(s): P.S. Gasiukov (USSR)
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Uncertainty in green weight estimates from Norwegian krill fishing vessels
an issue raised repeatedly within CCAMLR for a number of years, resulting in a modification to the C1 ... form implemented for the fleet in 2012. There are at present three Norwegian vessels operating in the ... krill fishery for Euphausia superba in the Antarctic. These vessels have in recent years contributed to ... therefore be important contributions to an estimate of total uncertainty in catch weight. Here, we present ...
Meeting Document : WG-EMM-13/41 : Author(s): G. Skaret and T. Knutsen (Norway)
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A summary of scientific observer deployments and data collection in the krill fishery during the 2011, 2012 and 2013 seasons
Abstract: The level of observer coverage in the krill fishery and the scientific sampling ... undertaken are summarised. During 2012 all 12 of the vessels that participated in the krill fishery carried ... observers for some or all of their fishing operations. From a total of 860 vessel days of fishing in 2012 ... ‘days’. Krill length-frequency distributions showed that the greatest variability in size structure ...
Meeting Document : WG-EMM-13/38 : Author(s): CCAMLR Secretariat
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Krill biomass estimates for two survey boxes to the north east and north-west of South Georgia in January 1996: the beginning of a five-year monitoring program
Abstract: Acoustic surveys were carried out in January 1996 within two 100 x 80 km boxes located ... the first in a new five-year British Antarctic Survey programme initiated in part to monitor inter ... -annual variability in the abundance of the Antarctic krill Euphausia superba in the South Georgia region ... parallel transects, 80 km in length, running perpendicular to the major direction of shelf-break in the ...
Meeting Document : WG-EMM-96/18 : Author(s): Watkins, J.L., Murray, A.W.A., Brierley, A.S.
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Results of E.L. Holmberg 1997 fish survey in Subarea 48.3
Abstract: The survey comprised 51 bottom trawl hauls taken in subarea 48.3. Of these, one was ... discarded due to net damage. About 80% of the hauls were taken in the shelf of South Georgia Islands (41 ... ) and the remaining in the Shag Rocks area (9); 64% of the hauls were intended as replicates of the ... position of hauls in the previous cruises. Mean densities were obtained considering the spatial aggregation ...
Meeting Document : WG-FSA-97/47 : Author(s): Prenski, B., Calcagno, J., Marschoff, E.R., Gonzalez, B.
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Krill catch distribution in relation to predator colonies 1987 to 1992
Abstract: The distribution of krill catches in relation to land-based predator colonies ... , calculated from CCAMLR fine-scale data, is shown for Subareas 48.1 and 48.2. The pattern of catches in 1992 ... -distance’). Although data reporting was not complete for Subarea 48.2 in 1992, it was estimated that 38% of ... the total catch from this subarea was taken in the critical period distance, compared to 5 to 78% in ...
Meeting Document : WG-KRILL-93/10 : Author(s): Secretariat