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Predation release of Antarctic silverfish in the Ross Sea: how sensitive is the conclusion to uncertainties in the diet of Antarctic toothfish over the shelf?
Abstract: Between 2001 and 2013 the number of breeding pairs of Adélie penguins (Pygoscelis ... half a million. It has been suggested that predation release of Antarctic silverfish (Pleuragramma ... toothfish stomachs showed that toothfish consume only a small proportion of silverfish (1.9–5.6%W i.e. by ... predation by fishing (643 tWW/y) was equivalent to 2.4% of the amount of silverfish estimated to be consumed ...
Meeting Document : WG-FSA-15/41 : Autor(es): M.H. Pinkerton, P. O’B. Lyver, D.W. Stevens, J. Forman, R. Eisert and S. Mormede (New Zealand)
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Relationship between Antarctic krill (Euphausia superba) variability and westerly fluctuations and ozone depletion in the Antarctic Peninsula area
of r = 0.76 with a level of significance of 1 %). We suspect that ozone depletion impacts directly ... density with hypothesized environmental factors, including strength of westerly winds (westerlies ... and the strength of westerlies during 1982–1998. Years with strong westerlies during the austral ... /1997. The strength of westerlies was significantly related to recruitment of 1-year-old krill (1039 ...
Meeting Document : WG-EMM-99/52 : Autor(es): M. Naganobu, K. Kutsuwada, Y. Sasai and T. Taguchi (Japan) and V. Siegel (Germany)
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Preliminary assessment of Dissostichus eleginoides on the Heard Island Plateau (Division 58.5.2) based on a survey in May 2002
results for 2001. The pooled length-density distribution for the 2002 survey shows that the younger year ... classes (ages 2 and 3) are likely to be much weaker than the current juvenile year classes (ages 4 to 8 ... ) in the survey area. The analysis also shows that larger fish seem to have left the survey area. The ... is expected to be undertaken at the Working Group on Fish Stock Assessment, including projections for ...
Meeting Document : WG-FSA-02/70 : Autor(es): A.J. Constable, R. Williams and T. Lamb (Australia)
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Analysis of the diet of Champsocephalus gunnari in Subarea 48.3, in late summer of years 1994–97, Dr E. Holmberg surveys
with/without food in the area of investigation didn039;t show a consistent pattern from year to year ... length of C. gunnari didn039;t show a selectivity pattern for any of the prey items. The availability ... , phenomenon for which non consistent explanation was found. The variation of the diet with respect to the ... of krill in the Statistical Subarea 48.3 in the period investigated can be defined as low in 1944 ...
Meeting Document : WG-FSA-97/48 : Autor(es): Barrera-Oro, E., Marschoff, E., Casaux, R.
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Variability of krill biomass estimates in repeated mesoscale surveys in relation to CCAMLR-2000 Survey
CCAMLR-2000. Krill biomass index calculated for the whole area of Soviet surveys doesn039;t reveal any ... density reflect biomass variability, it may be suggested that value of the total krill biomass in the area ... 48 is quite stable during last seventeen years. It is to be noted however that due to difference in ... ” (11.10.84-14.12.84 and 20.01.88-09.03.88). There were used similar gear (Isaak039;s Kidd Midwater Trawl ...
Meeting Document : WG-EMM-01/28 : Autor(es): V.A. Sushin, F.F. Litvinov (Russia) and V. Siegel (Germany)
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Proportional recruitment indices of Antarctic krill from Japanese fisheries data in Subareas 48.1, 48.2 and 48.3 during 1980 through 1997
Siegel et al. (1 998)039;s values. This may be due to the net selectivity and/or incomplete coverage of ... R1 and R2 in Subarea 48.1 generally showed similar trends to Siegel et al. (1 998)039;s values ... operation periods and occasional small sample size, interpretation of it039;s pattern in this Subarea ... should be dealt very carefully. In Subarea 48.3, R1 values showed the evidence of recruitments in two ...
Meeting Document : WG-EMM-98/33 : Autor(es): S. Kawaguchi, T. Ichii and M. Naganobu (Japan)
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A revision of yield and catch controls for managing the mackerel icefish (Champsocephalus gunnari) fishery in the vicinity of Heard Island and McDonald Islands
Bank. The paper reviews current catch controls and suggests that some consideration needs to be given ... Plateau population using the short-term assessment are 1150 tonnes for 2000/01 and 1000 tonnes for 2001/02 ... to ensure spawning aggregations are not disrupted. Also, some consideration may need to be given to ... altering the minimum size regulations at CCAMLR in 2001 to account for the potential for unassessed cohorts ...
Meeting Document : WG-FSA-00/41 : Autor(es): A. Constable, R. Williams, T. Lamb and E. van Wijk (Australia)
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RAPID WARMING OF THE OCEAN AROUND SOUTH GEORGIA,SOUTHERN OCEAN, DURING THE 20TH CENTURY: FORCINGS, CHARACTERISTICS AND IMPLICATIONS FOR LOWER TROPHIC LEVELS
century, with differential warming between summer and winter months and an indication that late 20th ... changes in heat fluxes associated with the SAM. In addition, we consider the implications that long-term ... 20th century but there are few locations with data before the 1950s. In addition, assessments of change ... in this region are hampered by the strong seasonal bias in sampling, with the vast majority of data ...
Meeting Document : WG-EMM-08/P03 : Autor(es): M.J. Whitehouse, M.P. Meredith, P. Rothery, A. Atkinson, P. Ward and R.E. Korb
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Estimating the biodiversity of the sub-Antarctic Indian part for ecoregionalisation: Part I. Pelagic realm of CCAMLR areas 58.5.1 and 58.6
be low in the north, consistent with the limit of the main distribution of the species. The quasi ... (3) a mixed approach, we called “ecoregionalisation”, which includes taxonomic, ecological and ... physiognomic data. The mixed approach is a relatively new method and is demonstrated on mesopelagic fish here ... . It will be also applied to pelagic fish and zooplankton as work progresses. The Kerguelen Plateau ...
Meeting Document : WS-MPA-11/10 : Autor(es): P. Koubbi (France), P.A. Hulley (South Africa), B. Raymond (Australia), F. Penot, S. Gasparini, J.P. Labat, P. Pruvost (France), S. Mormède (New Zealand), J.O. Irisson, G. Duhamel and P. Mayzaud (France)
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Summary of the seabird and marine mammal observations during observed toothfish (Dissostichus spp.) longline fishing operations in CCAMLR Subareas 88.1 and 88.2
operations that targeted toothfish (Dissostichus spp.) in 2001–03 in Sub-areas 88.1 and 88.2. The ... identification of some species is difficult and some of the species that were reported from outside their known ... capense), Antarctic petrels (Thalassoica antarctica), Wilson039;s storm petrels (Oceanities oceanicus ... appeared to be generally uninterested in the line setting and were more likely to be well astern of the ...
Meeting Document : WG-FSA-04/42 : Autor(es): S.J. Baird (New Zealand)