Search results
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Influence of the quality and quantity of data from a multi-year tagging program on bias and precision of biomass estimates from an integrated stock assessment – update
estimates from an integrated tag-based assessment are influenced by various aspects of a multi-year tagging ... and the resulting data should not be used in stock assessments with only few years of data available. In contrast ... status in the assessment year stabilized or were relatively small with a tag size-overlap over 60-70 ... from a tagging program in recent years only can be sufficiently informative as long as estimates ...
Meeting Document : WG-FSA-12/18 : Author(s): P.E. Ziegler (Australia)
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Diving patterns and processes in epipelagic and benthic foraging sub-Antarctic seabirds
foraging period was 8 hours in both species, but Gentoos spent 50% of this time diving compared to 20 ... was 8 hours in both species, but Gentoos spent 50% of this time diving compared to 20% in Shags. Shags had ...
Meeting Document : WG-CEMP-91/19 : Author(s): T.D. Williams, J.P. Croxall (United Kingdom), Y. Naito and A. Kato (Japan)
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Intra-annual variability in the density of Antarctic krill (Euphausia superba) at South Georgia, 2002–2005: within-year variation provides a new framework for interpreting previous ‘annual’ estimates of krill density
) at South Georgia, 2002–2005: within-year variation provides a new framework for interpreting previous ... all three years, was detected. Krill densities in winter were predominantly low (mean = 18.7 ... g m –2, SD = 24.3), but had risen substantially by summer in each year (mean = 89.5 g m –2, SD = 64.2 ... to explore whether high-frequency temporal variation (i.e. within-year) could have led to the perceived ... , CCAMLR Saunders et al. 30 summer) in the light of repeated observations of within-year changes ... 30 0 19 6 30 –1 82 × 13 00 20 3 20 –1 89 × 2 19 / 02 –2 8/ 04 / 03 30 0 19 8 32 –1 84 ... 7 21 –2 13 × 5 14 / 01 –2 4/ 03 / 04 30 0 19 8 32 –1 84 × 13 00 22 6 20 –2 12 × 6 26 ... on 20/11/04 44.2 (157) –42.76 JR116 06/01–10/01/05 06/01–10/01/05 57.1 (144) –44.92 JR121 30/03–02/04 ...
Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 27–41 : Author(s): Saunders, R.A., A.S. Brierley, J.L. Watkins, K. Reid, E.J. Murphy, P. Enderlein and D.G. Bone
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Conservation Measure Conservation Measure 41-01 (2007)
Figure 1). Region SSRU Boundary Line 48.6 A From 50°S 20°W, due east to 1°30'E, due south to 60 ... °E, due east to 30°E, due south to coast, westward along coast to 20°E, due north to 60°S. G From 50 ... and Research Plans for the period up to 31 August 2008 shall be reported to CCAMLR by 30 September 2008 so ... . 8. Members who choose not to participate in the fishery prior to the commencement of the fishery shall ... General measures for exploratory fisheries for Dissostichus spp. in the Convention Area in the ... : CCAMLR-XXVI Period in Force: 2007- 2008 ...
Conservation Measure : 41-01 (2007)
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Conservation Measure Conservation Measure 25-02 (2015)
Period in Force: 2015- 2018 ... of no more than 20 m, or solid steel weights5 of at least 5 kg mass shall be used, spaced at intervals ...
Conservation Measure : 25-02 (2015)
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Temporal changes in sighting density indices of baleen whales in CCAMLR Subareas 48.1 and 48.2 based on three circumpolar sighting surveys
data in Subarea 48.1 corresponded to years 1982/83, 1989/90 and 1993/94+1999/00, respectively while ... that in Subarea 48.2 those corresponded to years 1981/82, 1986/87 and 1997/98, respectively. The density indices ... in Subarea 48.1 corresponded to years 1982/83, 1989/90 and 1993/94+1999/00, respectively while ... that in Subarea 48.2 those corresponded to years 1981/82, 1986/87 and 1997/98, respectively. The density indices ...
Meeting Document : WG-EMM-16/26 : Author(s): L.A. Pastene and T. Hakamada
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TEMPORAL CLARIFICATION OF THE TRANSITION FROM BLUE PHASE FINGERLING TO EARLY JUVENILE BROWN PHASE IN NOTOTHENIA ROSSII FROM THE SOUTH SHETLAND ISLANDS
juveniles of 8.5-20.9 cm and predominant age groups 1-2 years. Counting of sclerites facilitated ... juveniles of 8.5-20.9 cm and predominant age groups 1-2 years. Counting of sclerites facilitated ... rossii caught in Potter Cove, South Shetland Islands, in summer of years 2003-2006 and 2008. The sample ... was composed by blue phase fingerlings of 7-7.6 cm (TL) and age group 0 year and demersal young brown phase ...
Meeting Document : WG-FSA-09/32 : Author(s): E. Barrera-Oro, E. Moreira, N. Alescio and E. Marschoff (Argentina)
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A preliminary assessment of mackerel icefish (Champsocephalus gunnari) in Division 58.5.2, based on results from the 2015 random stratified trawl survey
population structure, abundance and yield for the area of Division 58.5.2 to the west of 79o 20’ E using ... population structure, abundance and yield for the area of Division 58.5.2 to the west of 79o 20&rsquo ...
Meeting Document : WG-FSA-15/12 Rev. 1 : Author(s): D.C. Welsford (Australia)
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Detection of systematic change in Adélie penguin foraging trip duration: consequences of high inter-annual variability and usefulness of ice cover as a covariate
Abstract: Power analyses were carried out using a 12 year data set from the Béchervaise Island ... three years or alternatively, with equal power, a 3.75% annual increase in trip duration after 12 years ... Power analyses were carried out using a 12 year data set from the Béchervaise Island Adélie penguin ... were required to detect a 35% step increase in foraging trip duration after three years ...
Meeting Document : WG-EMM-05/22 : Author(s): J. Clarke, C. Southwell and L.M. Emmerson (Australia)
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Management of C. gunnari in Subarea 48.3
with increased consumption of icefish by Antarctic fur seals in years of poor krill availability. Thus natural ... mortality of icefish may, in some years, increase by a large factor (assumed here to be 4) declining ... by fishing, under conditions where M is assumed to be highly variable from year to year. Author(s): Kirkwood ... of icefish by Antarctic fur seals in years of poor krill availability. Thus natural mortality of icefish may ...
Meeting Document : WG-FSA-97/38 : Author(s): Kirkwood, G.P., Parkes, G.B., Everson, I., Agnew, D.J.