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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 ... krill fishery for Euphausia superba in the Antarctic. These vessels have in recent years contributed to ... form implemented for the fleet in 2012. There are at present three Norwegian vessels operating in the ... therefore be important contributions to an estimate of total uncertainty in catch weight. Here, we present ...
Meeting Document : WG-EMM-13/41 : Autor(es): G. Skaret and T. Knutsen (Norway)
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NEW REGIONAL-SCALE SURVEYS OF THE ADÉLIE PENGUIN BREEDING POPULATION IN PRYDZ BAY: A STEP TOWARDS IMPROVED ESTIMATION OF KRILL CONSUMPTION IN EAST ANTARCTICA
conducted 30 years ago. To understand current levels of prey consumption in east Antarctica it is therefore ... Abstract: Understanding circumpolar penguin abundance is critical for developing realistic ... . A review of historical Adélie penguin survey data in east Antarctica revealed Prydz Bay as a ... priority region for new survey work to improve population estimates. Prydz Bay is considered to have the ...
Meeting Document : WG-EMM-11/32 : Autor(es): C. Southwell, J. McKinlay, K. Newbery, L. Emmerson and J. Lieser (Australia)
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Comparative biological characteristics of Electrona carlsbergi (Tåning) (Myctophidae) from the notal and Antarctic areas in the Southern Ocean Atlantic sector
somewhat higher,with the highest increment being observed at the 1st and 2nd years of life. Limiting age ... for fish from the notal area is, probably, 5 years. E. carlsbergi investigated in the Antarctic waters ... become mature at the 3rd year of life at 85-89 mm length. Determined differences of the length–age and ... the Southern Ocean Atlantic sector have been studied on the basis of the data for 1987-1989. Mean ...
Meeting Document : WG-FSA-90/21 : Autor(es): K.V. Gorchinsky, V.M. Kiseleva and A.A. Filin (USSR)
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Characterisation of Muraenolepis species by-catch in the CCAMLR Convention Area
published suggest a relatively fast growing, semelparous, life history with a maximum age of 11 years. The ... estimate of K from the growth function for specimens assumed to be M. evseenkoi is much higher than for ...
Meeting Document : WG-FSA-12/50 : Autor(es): S. Parker, P. McMillan and P. Marriott (New Zealand)
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Diving pattern and performance in nonbreeding gentoo penguins (Pygoscelis papua) during winter
patterns, averaging 10-20 m at dawn and dusk and 70-90 m at midday. These results are consistent with the ... were bimodal. Shallow dives (30 m; 55% of total number and 81% of dive time) averaged 74-105 m and 2.7 ... , and deep dives mainly for feeding. Foraging activity of non breeding Gentoo Penguins in winter is ... similar to that of chick-rearing birds. The only major differences are that foraging-trip frequency is 20 ...
Meeting Document : WG-CEMP-92/37 : Autor(es): T.D. Williams (United Kingdom), A. Kato (Japan), J.P. Croxall (United Kingdom), Y. Naito (Japan), D.R. Briggs, S. Rodwell and T.R. Barton (United Kingdom)
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Preliminary assessment of mackerel icefish, Champsocephalus gunnari, on the Heard Island Plateau (Division 58.5.2) based on a survey in April–May 2003
of un-assessed cohorts and provide for more stable catches between fishing years, while meeting the ... Abstract: A preliminary assessment of yield of Champsocephalus gunnari for Heard Island Plateau ... approximately 20% of the 2002 estimate. This decline in abundance is consistent with the passage of the strong ... of short-term yield for 2004 and 2005 using the Mathcad implementation were 259 tonnes and 196 tonnes ...
Meeting Document : WG-FSA-03/32 : Autor(es): A.J. Constable, C.R. Davies, R. Williams and T. Lamb (Australia)
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Krill population trends
concentrated for the last 20 years. There have been suggestions of changes in the distribution and abundance of ... data available for Antarctic krill and will present an indication of the extent and limitations of the ... abundance make detection of long-term trends difficult to detect. This review examines the main types of ...
Meeting Document : CCAMLR-IWC-WS-08/11 : Autor(es): Tarling, G., Watkins, J., Quetin, L., Reiss, C., Atkinson, A., Ross, R., Pakhomov, E., Kawaguchi, S., Nicol, S., Siegel, V.
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Summary of the toothfish fishery and tagging program in the Amundsen Sea region (SSRUs 882C–H) to 2017/18
recapture tagged fish remains an issue for tag-based estimations of biomass and we note that improved ... maximum of 20% change in the catch limit from 200 t. Research block 882_2: 240 t based on a one-year ... biological characterisation of the fishery shows a truncation of the right-hand limb of the age distribution ... between 2004 and 2014. No age data are currently available after 2014. We recommend that further ageing of ...
Meeting Document : WG-FSA-18/36 : Autor(es): S. Mormede and S. Parker
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Results of E.L. Holmberg 1997 fish survey in Subarea 48.3
discarded due to net damage. About 80% of the hauls were taken in the shelf of South Georgia Islands (41 ... , including Champsocephalus gunnari at the shelf of the South Georgia Islands. The age and size structure of ... this species in the whole subarea 48.3, is dominated by younger fish (less than two years). Four years ...
Meeting Document : WG-FSA-97/47 : Autor(es): Prenski, B., Calcagno, J., Marschoff, E.R., Gonzalez, B.
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Entanglement of Antarctic fur seals (Arctocephalus gazella) in man made debris at Bird Island, South Georgia, during the 2006 winter and 2006/07 breeding season
Georgia for the 17th consecutive winter (2006) and 19th consecutive summer (2006/07) are reported here. A ... was 17, an increase of 112.5% over the previous summer, and the highest since 2001/02. During the ... majority of the sexed individuals in all age classes (43%) compared to males (33%) and the remainder ... unknown. The increase in the number of winter entanglements (41) and animals with severe wounding (20) was ...
Meeting Document : SC-CAMLR-XXVI/BG/17 : Autor(es): Delegation of the United Kingdom