Resultados de la búsqueda
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Predation release of Antarctic silverfish (Pleuragramma antarctica) in the Ross Sea
predation release hypothesis. In particular, the examination of 422 Antarctic toothfish stomachs showed that ... the amount of silverfish consumed annually by Adélie penguins in this region. This result was ... increases in the number of Adélie penguins breeding in the southern Ross Sea. Mixed trophic impact (MTI ... changes in toothfish biomass and changes to the biomasses of silverfish and Adélie penguins. Essentially ...
Meeting Document : WG-EMM-15/53 : Autor(es): M.H. Pinkerton, P. Lyver, D. Stevens, J. Forman, R. Eisert and S. Mormede (New Zealand).
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Revised assessment models for Patagonian toothfish in research block 58.4.3a_1 of Division 58.4.3a, Elan Bank for the years 2005–2014
300 m) CASAL models for stock status assessments of Dissostichus eleginoides in the research block ... released in 2012 for ELAN_len, ELAN_age and ELAN_lenOB models reflected a large number of recaptures of the ... tags released concentrated in the western area of research block. This is why the removal of 2012 tag ... release data boosted the MPD estimate of B 0 in ELAN_tag model. The selectivity of the right hand limb of ...
Meeting Document : WG-FSA-15/22 : Autor(es): K. Taki (Japan), S. Mormede (New Zealand) and T. Ichii (Japan)
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An updated descriptive analysis of the toothfish (Dissostichus spp.) tagging program in Subareas 88.1 and 88.2 for 2006/07
Abstract: The descriptive analyses of the toothfish tagging programme carried out in Subareas ... , and 911 Patagonian toothfish released and 43 recaptured since 2001. The number of tags recaptured in ... number caught in 2006, although the nature of these recaptures suggests that assumptions of homogeneous ... provides an update of the preliminary tag-release and tag-recapture data that were presented at the July ...
Meeting Document : WG-FSA-07/40 : Autor(es): A. Dunn, S.M. Hanchet and S.L. Ballara (New Zealand)
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A revised estimate of short-term yield for the mackerel icefish (Champsocephalus gunnari) off Heard Island based on a trawl survey in 1998
Shell Bank) in the vicinity of Heard Island enabled a revised estimate of yield for the coming 2 seasons ... in 1999 and 2000. While the abundances of icefish are lower in 1998 than in 1997, the Age 3 and Age 4 ... tonnes for 2000. These figures may need to be re-evaluated in light of known catches in the 1998 season ... since the survey. Estimates of yield were not made for Shell Bank given the very low abundance in this ...
Meeting Document : WG-FSA-98/54 : Autor(es): A. Constable and D. Williams (Australia)
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Mackerel icefish Champsocephalus gunnari in the diet of upper trophic level predators at South Georgia: implications for fisheries management
fisheries. Data on the frequency and size structure of C. gunnari in the diet of Antarctic fur seals ... 1993, 1996, 1999 and 2001. A recruitment index based on the contribution by mass of the 1+ age-class in ... the diet of gentoo penguins indicated a higher degree of variability in recruitment than in considered ... in the diet of upper trophic level predators at South Georgia: implications for fisheries management ...
Meeting Document : WG-FSA-03/74 : Autor(es): K. Reid, S. Hill and T. Diniz (United Kingdom)
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Interannual variability of polynya extent in the Antarctic Ocean
and converted into the yearly mean. The time series of the yearly mean in the whole Antarctic Ocean ... are trending like a pulse wave. In the whole Antarctic Ocean, peak years of polynyas extent are in the ... variability of polynya extent in the Antarctic Ocean Approval: Approved ... ), coastal polynya and open ocean polynya, in the Southern Ocean. Polynya accelerates oceanic and atmospheric ...
Meeting Document : WG-EMM-01/34 : Autor(es): M. Naganobu and K. Segawa (Japan)
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Descriptive analysis of mesopelagic backscatter from acoustic data collected in the Ross Sea
quantify spatial and vertical distribution of acoustic backscatter in the upper 1000 m of the water column ... . There were clear spatial patterns in the amount and type of mesopelagic backscatter observed. There was ... much more backscatter in the upper 1000 m and a wider variety of mark types north of 67° S. Common mark ... shelf edge. In general, the amount of backscatter observed in the Ross Sea was much lower than that ...
Meeting Document : WG-EMM-06/11 : Autor(es): R.L. O’Driscoll (New Zealand)
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Entanglement of Antarctic fur seals (Arctocephalus gazella) in man-made debris at Bird Island, South Georgia, during the 1996 winter and 1996/97 pup-rearing season
entangling materials, with the abundance of string and fishing net reversed from most previous years. In ... level of entanglements in summer is encouraging. The increase in winter records, however, is ... ): Delegation of the United Kingdom Title: Entanglement of Antarctic fur seals (Arctocephalus gazella) in man ... Abstract: The results of the survey of entanglement of Antarctic fur seals at Bird Island, South ...
Meeting Document : SC-CAMLR-XVI/BG/06 : Autor(es): Delegation of the United Kingdom
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Assessment models for Patagonian toothfish in research block 58.4.3a_1 of Division 58.4.3a, Elan Bank for the years 2005-2014
m) CASAL models for stock status assessments of Dissostichus eleginoides in the research block ... ELAN_1 model reflected a large number of recaptures of the tags released concentrated in the western area ... of research block. This is why the removal of 2012 tag release data boosted the MPD estimate of B0 in ... ELAN_2 model. The selectivity of the shallow fishery is poorly estimated in MCMC runs for ELAN_1 model ...
Meeting Document : WG-SAM-15/24 : Autor(es): K. Taki (Japan), S. Mormede (New Zealand) and T. Ichii (Japan)
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Size at maturity and histological procedures explored to determine spawning activity of female Dissostichus mawsoni from samples collected from the Ross Sea in January 2004, December 2004 and January 2005
the 2003/04 and 2004/05 commercial fishing seasons in the Ross Sea to improve estimates of size of ... development visible in histological sections of the 2003/04 samples. Using this methodology, it is ... size at maturity. The calculated Lm50 of 113.0 cm was very close to the value of 115.2 cm estimated in ... spawning activity that may also be useful in ascertaining the maturity ogive of D. mawsoni in the previous ...
Meeting Document : WG-FSA-05/63 : Autor(es): M.E. Livingston and P. Grimes (New Zealand)