Search results
-
An overview of Southern Ocean zooplankton data: abundance, biomass, feeding and functional relationships (submitted to the 2008 Joint CCAMLR-IWC Workshop)
for differences in the extent of identification of early larval stages. Likewise, the time of year, depth ... <30% of primary production. This emphasises the dominant role of microbial food chains involving ... , the time of year, depth of sampling and mesh size of sampler greatly influence the recorded abundance ... in the SO, since mesozooplankton typically remove <30% of primary production. This emphasises ... of those above. A change in the view of SO copepods in the last 20 years has followed an increase ... of early larval stages. Likewise, the time of year, depth of sampling and mesh size of sampler greatly ... /micrometazoa (<200 μm) are the main grazers in the SO, since mesozooplankton typically remove <30% of primary ... and birds. Atkinson et al. 172 Introduction During the 80-year history of active research on Southern ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 171–218 : Author(s): A. Atkinson, P. Ward, B.P.V. Hunt, E.A. Pakhomov and G.W. Hosie
-
UPDATE OF THE INTEGRATED STOCK ASSESSMENT FOR THE PATAGONIAN TOOTHFISH (DISSOSTICHUS ELEGINOIDES) FOR THE HEARD AND MCDONALD ISLANDS USING CATCH-AT-AGE DATA AND TWO YEARS OF SURVEY ABUNDANCE-AT-AGE DATA
combination of fishery and year had available at least 50 aged fish. For the trawl fisheries that were divided ... into periods within each year, the same ALK for the year was applied to the length frequency (LF) samples ... for each fishing period within that year. For years where insufficient fish were aged the catch-at-length ... fish in the assessment was 3 but some fishery-by-year combinations had a higher value of 4. The output ...
Meeting Document : WG-SAM-09/09 : Author(s): S.G. Candy (Australia)
-
Assessment models for Antarctic toothfish (Dissostichus mawsoni) in Subarea 88.2 SSRUs 88.2C–G for the years 2002–03 to 2010–11
to a 20% increase in biomass. We believe that the SSRU 88.2C–G model provides a more realistic ... 88.2 SSRUs 88.2C–G for the years 2002–03 to 2010–11 Approval: Approved ... to a 20% increase in biomass. We believe that the SSRU 88.2C–G model provides a more realistic ... –G for the years 2002–03 to 2010–11 ...
Meeting Document : WG-FSA-11/43 : Author(s): S. Mormede, A. Dunn and S.M. Hanchet (New Zealand)
-
Movement, growth and available abundance to the fishery of Dissostichus eleginoides Smitt, 1898 at Heard Island, derived from tagging experiments
e nu m be rs (m ill io ns ) 1998 1999 2000 2001 Year 0 10 20 30 40 50 Pr ed ic te d nu ... m be rs (m illi on s) 1998 1999 2000 2001 Year 50 40 30 20 10 0 P re di ct ed n um be rs ... – r ec ap tu re lo ca ti on s. 20 00 30 00 40 00 40 00 30 00 30 00 20 00 10 00 50 ... B 55 8 70 7 77 8 1 15 5 22 10 7 20 4 30 6 Fi sh in g gr ou nd C 23 7 50 51 0 18 ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 33–48 : Author(s): Williams, R., G.N. Tuck, A.J. Constable and T. Lamb
-
The toothfish fishery in Subareas 88.1 and 88.2 from 1997/98 to 2002/03: New Zealand vessel summary
from 13 to 30 years dominated the catch. No progressions of any particularly strong or weak year ... from 13 to 30 years dominated the catch. No progressions of any particularly strong or weak year ... of the 2002–03 CCAMLR split fishing year), and to compare these results with previous years. Note this report ... . Patagonian toothfish dominated the catches from 60 to 62° 30' S but Antarctic toothfish dominated ...
Meeting Document : WG-FSA-03/44 : Author(s): M.L. Stevenson, S.M. Hanchet and P.L. Horn (New Zealand)
-
Is current management of the Antarctic krill fishery in the Atlantic sector of the Southern Ocean precautionary?
estimated subarea biomass in up to 20% of years due to high variability in krill biomass indices. The actual ... in up to 20% of years due to high variability in krill biomass indices. The actual exploitation rate ... in 1991, is 0.62 million tonnes year –1, equivalent to ~1% of the regional biomass estimated in 2000. Each ... subarea has also had its own catch limit, between 0.093 and 0.279 million tonnes year –1, since 2009 ... exceed 9.3% of conservatively estimated subarea biomass in up to 20% of years due to high variability ... . the total weight of reproductively mature individuals) after 20 years of fishing should not be below 75 ... to simulations, harvesting the trigger level each year for 20 years would reduce the krill stock by 2% (SC ... in noisy time-series such as these. Multi- decadal series (30 to 40 years of data) (Henson et al., 2010 ...
Science Journal Paper : CCAMLR Science, Volume 23 (CCAMLR Science, Volume 23) : 31–51 : Author(s): Hill, S.L., A. Atkinson, C. Darby, S. Fielding, B.A. Krafft, O.R. Godø, G. Skaret, P.N. Trathan and J.L. Watkins
-
Breeding biology of Adélie penguin (Pygoscelis adeliae) at Edmonson Point CEMP site (Ross Sea, Antarctica): report of the first five years
for the fifth year. The study site was located in the Adélie penguin (Pygoscelis adeliae) colony of Edmonson ... Point (74°20'56.7" S, 165°08'10.03" E). The aim of this research was to obtain data ... of the first five years Approval: Approved ... year. The study site was located in the Adélie penguin (Pygoscelis adeliae) colony of Edmonson Point ...
Meeting Document : WG-EMM-99/60 : Author(s): S. Olmastroni, S. Corsolini, F. Pezzo, S. Focardi (Italy) and K. Kerry (Australia)
-
Status of krill target strength
in single-animal measurements, namely thresholding. Theoretical estimates for the target strength ... of target strength on both animal size and transmit frequency, notwithstanding admitted shortcomings. Some ... recent single-animal measurements of target strength for live euphausiids and euphausiid-re1ated ... in single-animal measurements, namely thresholding. Theoretical estimates for the target strength ...
Meeting Document : WG-KRILL-92/11 : Author(s): K.G. Foote (Norway), D. Chu and T.K. Stanton (USA)
-
Factors to consider in developing management measures for krill
from year to year. The various techniques used to estimate the abundance of animal populations also ... OTKPbITbIX-3aKpbITbIX paHoHoB H ce30HOB. IIpe~RaraIOTc~ HeKOTopbIe MepbI no ynpaBReHHIO, KOTopbIe Mor RH ... in the past, and this raises the need for new approaches to fishery conservation. In any case, the problems ... . 2. OBJECTIVES OF CCAMLR 176 The general objectives of CCAMLR are given in Article IT of the Convention ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 175–187 : Author(s): de la Mare, W.K.
-
Results of acoustic assessment of krill biomass in Subarea 48.2 during summer 1996
' S- 60°30' S and 42 °00' W- 50°00 'w within Subarea 48.2. The study area of 19.200 ... -tacks distance of 20 miles. The echosurvey was carried out diurnally. Krill target strength ... no the southern part (southwards of 60 ° 30'S) of Subarea 48.2 where southwards off Coronation Island ... considerable kri11 fishing grounds occure. According to AtlantNIRO data krill biomass southwards of 60 ° 30 ...
Meeting Document : WG-EMM-96/36 : Author(s): Sunkovich, V.I., Kasatkina, S.M., Abramov, V.M., Polischuk, M.I., Sushin, V.A., Shnar, V.N.