Search results

1. Statistical problems in krill stock hydroacoustic assessments

   accuracy of target-strength measurements. In the case of statistical methods, there are no clear guidelines ... Abstract:  Two primary issues are at question for hydroacoustic assessments of krill, The first is ... the methods applied to establish biomass in a survey area and the second is the improvement in ... for deciding what method is most appropriate, this is made even more difficult by the fact that most ...

   Meeting Document : SC-CAMLR-VII/BG/22 : Author(s): United States of America

2. Growth rates of Antarctic fur seals as indices of environmental conditions

   Abstract:  The growth rates of Antarctic fur seal Arctocephalus gazella pups estimated from ... weighing cross-sections of the population were compared with measured/inferred changes in the the ... availability of their main prey species, Antarctic krill Euphausia superba from 1989-2000. There was no ... growth rates in years of low krill availability. Biases reflecting changes in the component of the ...

   Meeting Document : WG-EMM-01/20 : Author(s): K. Reid (United Kingdom)

3. Recruitment of Antarctic krill (Euphausia superba) and possible causes for its variability

   Abstract:  Between year variability of krill year class success and recruitment during the 1977 ... Resources Program cruises in the Elephant Island area. The recruitment index (R1), based on the relative ... abundance of the 1 + age class, varies substantially between years, whereas it is quite similar between ... different surveys within the same field season. The overall mean recruitment index for all years was Rmean ...

   Meeting Document : WG-EMM-95/15 : Author(s): Siegel, V., Loeb, V.

4. Foraging patterns in the Antarctic shag (Phalacrocorax bransfieldensis) at Harmony Point, Antarctica

   reduce the extension of the foraging trips which in years of scarce food availability may no result in ... Abstract:  During the 1995/96 and 1996/97 summer seasons the foraging pattern of the Antarctic ... usually foraged once a day; females early in the morning and males when their partners returned to the ... nests. During the rearing period the parents incremented the number of daily foraging trips usually ...

   Meeting Document : WG-EMM-04/22 : Author(s): R. Casaux and A. Baroni (Argentina)

5. Age and growth of the Antarctic skate (Amblyraja georgiana) in the Ross Sea

   provided for females, males, and both sexes combined. There was no obvious difference between the sexes, so ... caudal thorns, were used to estimate the ages of Amblyraja georgiana from the Ross Sea. Caudal thorns ... viewed with transmitted white light provided the clearest growth bands, but reading precision was low ... , producing uncertain age estimates. Furthermore, annual deposition of thorn bands has not been validated. The ...

   Meeting Document : WG-FSA-04/29 : Author(s): M.P. Francis and C. Ó Maolagáin (New Zealand)

6. A review and preliminary analysis of CEMP data

   at Anvers Island. As the breeding success at this site has not declined also, local redistribution could ... at this site has not declined also, local redistribution could be the cause. An examination of migration ...

   Meeting Document : WG-EMM-02/7 : Author(s): Secretariat

7. Total mercury and methylmercury concentrations in Antarctic toothfish (Dissostichus mawsoni): Health risk assessment

   Abstract:  In the present study, the concentrations of total mercury in different organs of the ... Division 58.4.1 off the coast of Antarctica were determined. The results revealed total mercury ... concentrations of 0.165 ± 0.095 mg/kg (0.023–0.454 mg/kg) in the Antarctic toothfish. In fish muscle ... , methylmercury accounted for approximately 40% of the total mercury. In a comparison analysis, muscle and liver ...

   Meeting Document : WG-FSA-17/P02 : Author(s): M. Yoon, M.-R. Jo, K.-T. Son, W.-S. Choi, S. I. Kang, S.-G. Choi, J. H. Lee and T. S. Lee

8. PROPOSAL FOR AN EXTENSION TO THE MARK–RECAPTURE EXPERIMENT TO ESTIMATE TOOTHFISH POPULATION SIZE IN THE SOUTH OF SUBAREA 48.4

   no bird entanglements or mortalities were reported; 5. The UK proposes to continue the mark-recapture ... Abstract:  1. A three-year tagging study in the South of Subarea 48.4 was initiated in the 2008/09 ... fishing season with the aims of providing the data required for assessments of the population structure ... , size, movement and growth of both Dissostichus eleginoides and Dissostichus mawsoni in the South of ...

   Meeting Document : WG-FSA-09/18 : Author(s): J. Roberts and D.J. Agnew (United Kingdom)

9. Potential VMEs around Elephant and the South Shetland Islands (Subarea 48.1)

   in the South Shetland Islands area.  High biomass densities of VME indicator taxa, meeting the 10 kg ... ascidians) such that communities of many ‘light’ VME taxa have little to no chance of meeting this criterion ... new ‘diversity threshold’ is proposed in order to protect those VME taxa that do not occur in the ... Appendix II listed Antipatharia (black coral), which in the authors’ experience has never occurred at a ...

   Meeting Document : WG-EMM-12/51 : Author(s): S.J. Lockhart (USA), N. Wilson (Australia) and E. Lazo-Wasem (USA)

10. Revised outline of the dedicated krill survey for CCAMLR Division 58.4.1 during 2018/19 season by the Japanese survey vessel, Kaiyo-maru

    conducted by Japanese research vessel, Kaiyo-maru. No krill biomass has been estimated in the Division since ... biomass to update B(0) in the area and (2) oceanographic observations in the area to detect long term ... changes if any. The krill survey (echosounder–EK80 and RMT) and subsequent biomass estimation will follow ... the CCAMLR standard protocol. Utility of 70 kHz in addition to 3 standard frequencies (38, 120 and 200 ...

    Meeting Document : SG-ASAM-18/03 : Author(s): H. Murase, K. Abe, R. Matsukura, H. Sasaki and T. Ichii

Pages