Resultados de la búsqueda
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Distribution and population structure of Dissostichus eleginoides and D. mawsoni on BANZARE Bank (CCAMLR Division 58.4.3b), Indian Ocean, Antarctic
maturity condition for Dissostichus eleginoides and D. mawsoni were investigated on Banzare Bank, using the ... mainly caught in the deeper slope >1500 m. The separation of the two species by depths may be related ... to the physical intolerance to the cooler temperature by the lack of antifreeze for the former ... species. The mean total length (TL) of females was significantly larger than that of males for both ...
Meeting Document : WG-FSA-10/47 : Autor(es): K. Taki, M. Kiyota, T. Ichii and T. Iwami (Japan)
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Distribution and population structure of Dissostichus eleginoides and D. mawsoni on BANZARE Bank (CCAMLR Division 58.4.3b), Indian Ocean, Antarctic
maturity condition for Dissostichus eleginoides and D. mawsoni were investigated on Banzare Bank, using the ... mainly caught in the deeper slope >1500 m. The separation of the two species by depths may be related ... to the physical intolerance to the cooler temperature by the lack of antifreeze for the former ... species. The mean total length (TL) of females was significantly larger than that of males for both ...
Meeting Document : WG-SAM-10/16 : Autor(es): K. Taki, M. Kiyota, T. Ichii and T. Iwami (Japan)
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Updated models of the habitat use of Patagonian toothfish (Dissostichus eleginoides) on the Kerguelen Plateau around Heard Island and the McDonald Islands (Division 58.5.2)
sex composition, when controlling for gear selectivity, year and sex effects. Fish length increased ... Abstract: The Kerguelen Plateau supports the largest fishery for Patagonian toothfish ... toothfish drawn from biological data collected in the HIMI area (Division 58.5.2) on more than 500,000 fish ... larger fish inhabit deeper waters (>1500m) especially on the eastern part of the Plateau, where the ...
Meeting Document : WG-FSA-14/42 : Autor(es): C. Péron and D.C. Welsford (Australia)
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Spatio–temporal dynamics in maturation and spawning of Patagonian toothfish Dissostichus eleginoides on the subantarctic Kerguelen Plateau
Sector of the Southern Ocean based on gonads and otoliths collected between years 2004–2015, and using ... mature females did not spawn every year. Age-at-maturity estimates, obtained based on the assumption that ... eleginoides in the Heard Island and McDonald Islands (HIMI) fishery on the Kerguelen Plateau in the Indian ... throughout the late autumn and winter months of May–August, and spawning activity is concentrated on slopes ...
Meeting Document : WG-FSA-17/P04 : Autor(es): P. Yates, P. Ziegler, D. Welsford, J. McIvor, B. Farmer and E.Woodcock
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Review of CCAMLR activities on monitoring marine debris in the Convention Area
the lowest levels on record being reported for the 2005 season. This increased to 10 entanglements in ... Abstract: The current status of national surveys on monitoring of marine debris and their impact ... on marine mammals and seabirds in the Convention Area has been reviewed. The CCAMLR Marine Debris ... Database contains data from 12 sites, most within Area 48. There are 4 sites that have data for more than 3 ...
Meeting Document : SC-CAMLR-XXV/BG/09 : Autor(es): Secretariat
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Monitoring and managing the effects of environmental change on toothfish assessments
, including stock distribution (for example, for its impact on tagged fish distribution or research survey ... Abstract: This paper presents a ‘first-step’ proposal for CCAMLR to consider the effects of ... environmental variability and change on management advice from toothfish assessments. We focus on changes to ... environmental conditions that are maintained over a number of years, which includes the effects of global ...
Meeting Document : WG-SAM-18/22 : Autor(es): M. Pinkerton, A. Dunn, S. Mormede and S. Parker
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Measures to avoid bias in abundance estimates of Dissostichus spp. based on tag-recapture data
Abstract: Using the simplest form of an abundance estimator using tag-recapture data, the Lincoln ... difficulty in accurately estimating key parameters, and consequently introduce bias into an abundance ... against this bias, or to account for their effects in assessment models. In nearly all cases, examples of ... depredation rates are a priority for new tagging programs and tag-based assessments. Due to the complexity of ...
Meeting Document : WG-SAM-12/23 : Autor(es): D.C. Welsford and P.E. Ziegler (Australia)
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On assessing the size of the humped rockcod stock (Notothenia gibberifrons) in Subarea 48.3
Abstract: An adaptive approach was used to assess the Notothenia gibberifrons stock in Area 48.3 ... imperative to estimate the catchability coefficient. This parameter was equal to 0.326 to 0.635. An adaptive ... logarithms of observed and calculated biomass indices and resulted in an estimate of from 21.5 to 42.1 ... thousand tonnes for N. gibberifrons biomass in the 1989/90 season. It is thus possible to suggest a TAC of ...
Meeting Document : WG-FSA-91/26 : Autor(es): P.S. Gasiukov (USSR)
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Foraging areas of black-browed and grey-headed albatrosses breeding on Macquarie Island in relation to marine protected areas
breeding on the Island. 3. During late incubation and brood periods over 90% of time spent foraging by ... Exclusion Zone around Macquarie Island. In contrast, grey-headed albatrosses (T. chrysostoma) spent on only ... 34 % of their time foraging in MPAs. 4. Black-browed and grey-headed albatrosses spent 30 % and 15 ... for 5% and 12% of the total foraging time respectively. 6. There was significant spatial overlap in ...
Meeting Document : WG-FSA-04/49 : Autor(es): A. Terauds, R. Gales, G.B. Baker and R. Alderman (Australia)
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Further calculations of the effects of krill fishing on predators
resilience of the albatross population to the effects of a krill fishery. An approach for estimating the ... situation where predator survival rates depend on other factors in addition to krill biomass. This is ... achieved by making the survival rates depend instead on krill "availability", where there is a ... random component in the relationship between krill biomass and availability. An examination of the ...
Meeting Document : WG-Krill-94/24 : Autor(es): D.S. Butterworth and R.B. Thomson (South Africa)