Résultats de la recherche
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First increment validation of Patagonian toothfish (Dissostichus eleginoides) from Heard Island
one opaque and one translucent increment is formed each year on the sectioned face of sagittal ... Abstract: Patagonian toothfish, (Dissostichus eleginoides) have traditionally been aged assuming ... routinely ageing D. eleginoides, resulting in differences of ageing data presented. One area that was ... the end of the first year of growth. While there is a general consensus that the observed increments ...
Meeting Document : WG-FSA-05/61 : Auteur(s): K. Krusic-Golub, C. Green and R. Williams (Australia)
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A characterisation of the toothfish fishery in Subareas 88.1 and 88.2 from 1997/98 to 2006/07
management of the SSRUs within the two subareas was changed for the 2006 season as part of a 3-year ... Shelf in 1999 and 2001), these year classes are not seen in large numbers in later years in the fishery ... SSRUs in the two subareas except for 881D and 882C have now been fished. The 2007 D. mawsoni catch was ... experiment (SC-CAMLR-XXIV). One of the aims of the experiment was to simplify the administration of the ...
Meeting Document : WG-FSA-07/28 : Auteur(s): S.M. Hanchet, M.L. Stevenson and A. Dunn (New Zealand)
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Measurements of sound-speed and density contrasts of Antarctic krill (Euphausia superba) on board RV Kaiyo Maru
-density contrasts between the animal and the surrounding water are required. Sound-speed and mass-density ... target strength and its directivity of krill were calculated using the stochastic DWBA model. Author(s ...
Meeting Document : WG-EMM-08/56 Rev. 1 : Auteur(s): Y. Takao, H. Yasuma, R. Matsukura, K. Amakasu and M. Naganobu (Japan)
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Updated description of Patagonian toothfish (Dissostichus eleginoides) tagging and ageing programs in Division 58.5.2, 1997–2015
expanded to include 6 vessels, 5 operating exclusively longline, and one dual purpose longliner/trawler. To ... consistently above 80% since 2012. Vessels have also explored new fishing grounds over recent seasons ... previous maximum age estimate of 42 years. These data have been used to develop age length keys and a ... an additional 2559 estimates of age, for fish captured during the 2014 and 2015 Random Stratified ...
Meeting Document : WG-FSA-15/55 : Auteur(s): D.C. Welsford, B. Farmer, T.D. Lamb, C. Péron, E. Woodcock and P.E. Ziegler (Australia)
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Spatial distribution and swarm characteristics of Antarctic krill around the South Shetland Islands
markedly higher than the other two years. Meanwhile, much more swarms (1055) were detected in February 2018 ... 2013, March 2015, January 2016 and February 2018 around South Shetland Islands. The swarm ... as swarms in a patchy fashion and the mean krill densities in December 2013 and February 2018 were ... in March 2015 compared with those in December 2013, January 2016 and February 2018, although the ...
Meeting Document : WG-EMM-18/42 : Auteur(s): X. Yu, X. Wang and X. Zhao
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Age determination of Antarctic krill using size, fluorescence, and image analysis techniques
methods indicate 6 year classes for adult krill. Correspondence between the ages determined by the two ... techniques is generally within one year. The animals were also analyzed by a computerized image analysis ... constructed to relate the image analysis parameters to age approached 90% for the ages defined by length ... frequency, and 52% for physiological age. Author(s): M.S. Berman, A.L. McVey and G. Ettershank (USA) Title ...
Meeting Document : SC-CAMLR-VI/BG/48 : Auteur(s): M.S. Berman, A.L. McVey and G. Ettershank (USA)
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Seabird mortality in the Patagonian toothfish longline fishery around the Prince Edward Islands, 1996–2000
measures and a progressive movement farther away from the islands over the years. We estimate that the ... , Unregulated and Unreported (IUU) fishing. Independent fishery observers accompanied all but two sanctioned ... killed species. However, during the first year, when lines were set during the day and night, a ... years, could have resulted in close to 7000 seabird mortalities and could have had significant impacts ...
Meeting Document : WG-FSA-01/8 : Auteur(s): D.C. Nel, P.G. Ryan and B.P. Watkins (South Africa)
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A CHARACTERISATION OF THE TOOTHFISH FISHERY IN SUBAREAS 88.1 AND 88.2 FROM 1997–98 TO 2007–08
-year experiment (SC-CAMLR-XXIV). One of the aims of the experiment was to simplify the administration ... 2001), these year classes are not seen in large numbers in later years in the fishery. So at this stage ... there is no evidence for strong variation in year class strength in the fishery. Author(s): M.L ... . All SSRUs in the two subareas except for 88.1D and 88.2C have now been fished. The 2008 D. mawsoni ...
Meeting Document : WG-FSA-08/22 : Auteur(s): M.L. Stevenson, S.M. Hanchet and A. Dunn (New Zealand)
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Do Adélie penguin fledgling weights provide an index of prey availability?
to two assumed proxies of prey availability: breeding success and foraging trip duration. Concordance ... between the two proxies was apparent when considering guard stage foraging trip durations but this was not ... . The concerns raised by Williams and Croxall (1990) that fledgling weight may increase with an ... Abstract: We examine fledgling weights measured over 11 years at Béchervaise Island in relation ...
Meeting Document : WG-EMM-05/21 : Auteur(s): L. Emmerson, C. Southwell and J. Clarke (Australia)
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Interannual changes in body fat condition, stomach content mass and distribution of minke whales in Antarctic Areas IV and V
the six years included in the study, two were categorized as years of poor body fat condition, and ... of minke whales in Antarctic Areas IV (70°-130° E) and V (130° E-170°W) from 1989/90 to 1994/95. Of ... . In Area V, in a year of high sea-ice extent, the krill-rich slope region in the western zone was ... three as years of good condition. Estimated body weight gain during the feeding season in poor years was ...
Meeting Document : WG-EMM-97/18 : Auteur(s): Ichii, T., Nishiwaki, S., Tamura, T., Fujise, Y., Matsuoka , K.