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Relationships of Antarctic krill (Euphausia superba Dana) variability with westerlies fluctuations and ozone depletion in the Antarctic Peninsula area
(Euphausia superba) is an important subject to clarify the Antarctic marine ecosystem. We have assessed ... -level pressure gradients across Drake Passage during 1982-1993. The years with high pressure gradients ... season), 1987/88 and 1990/91, while the years of extremely low values meaning weak westerly winds ... , krill stock density seems to be slightly recovering year by year after 1990 indicated a minimum of it ...
Meeting Document : WS-AREA 48-98/5 : Автор(ы): M. Naganobu, K. Kutsuwada, Y. Sasai and S. Taguchi (Japan)
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Antarctic neritic krill Euphausia chrystallorophias: spatio-temporal distribution, growth and grazing rates
for only 180 days per year, mean growth rates ranged from 0.070-0.075 to 0.019-0.022 mm per day during ... the first and the fourth year, respectively. Von Bertalanffy growth curves calculated for different ... Prydz Bay region. Size frequency analysis indicated that the generation time was ~ 3 years in the Indian ... sector of the Southern Ocean. Total life span of E.crystallorophias may exceed 5 years in the Prydz Bay ...
Meeting Document : WG-Joint-94/10 : Автор(ы): E.A. Pakhomov (Ukraine) and R. Perissinotto (South Africa)
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Fishery Report: Dissostichus eleginoides Kerguelen Islands (Division 58.5.1)
4 176 3 039 28 476 TOP 58.5.1 5 8. Depredation has an impact on the catch landed from each ... by adjusting the C2 catches by a factor of 1 for the years before 2001, 1.031 for the years 2003 ... –2007, and a linear interpolation between 1 and 1.031 for the years 2001 and 2002. Estimated CPUE ... dynamics for Divisions 58.5.1 and 58.5.2. 12. The Working Group noted that France has made progress on a ...
Document : Site Section: Publications
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Sensitivities in the assessment of the Patagonian toothfish (D. eleginoides) in Subareas 48.3 and 48.4 to truncation of tagging data
Abstract: The assessment of toothfish in CCAMLR subarea 48.3 currently uses the first four years ... double-tagged recaptures suggests that including recaptures from fish at liberty for long periods will ... introduce bias into the assessment. Sensitivity tests on both stocks show that this bias occurs in practice ... . Sensitivity tests on the 48.3 assessment show that this bias is not entirely explained by the effect of double ...
Meeting Document : WG-SAM-17/35 : Автор(ы): T. Earl
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Plan of research program of the Russian Federation in Subarea 48.5 (Weddell Sea) in season 2012/13
with CCAMLR decision rules. The program contains several phases and prospected for 3-5 years. Detailed ... as one of the most promising area for exploratory fishery of Dissostichus sp. However, fishery in ... subarea 48.5 is closed on the basis data on stock absence. The main objective of the present program is ... collecting data for reliable stock assessment and following estimation of precautionary limits in accordance ...
Meeting Document : WG-SAM-12/04 : Автор(ы): A.F. Petrov, V.A. Tatarnikov and I.I. Gordeev (Russia)
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Plan of research program of the Russian Federation in Subarea 48.5 (Weddell Sea) in season 2012/13
with CCAMLR decision rules. The program contains several phases and prospected for 3-5 years. Detailed ... as one of the most promising area for exploratory fishery of Dissostichus sp. However, fishery in ... subarea 48.5 is closed on the basis data on stock absence. The main objective of the present program is ... collecting data for reliable stock assessment and following estimation of precautionary limits in accordance ...
Meeting Document : WG-FSA-12/12 : Автор(ы): A.F. Petrov, V.A. Tatarnikov and I.I. Gordeev (Russia)
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Designing Marine Protected Area networks: insights from the CHARM3 project
Abstract: This paper presents results from two analyses that have been undertaken as part of ... Action 12 of the CHARM3 project, which focuses on spatial conservation planning in the English Channel ... . The first analysis investigates the use of species area curves for setting marine habitat targets and ... is a need for developing approaches that account for differences in sampling effort to ensure that ...
Meeting Document : WS-MPA-11/22 : Автор(ы): R.J. Smith and K. Metcalfe (UK)
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DNA barcoding highlights a cryptic species of grenadier (genus Macrourus) in the Southern Ocean
M. whitsoni from the Ross Sea region provided strong evidence for two sympatric species: M. whitsoni ... the Ross Sea region, and provisionally identified as M. whitsoni, were divided into two COI haplotypes ... , based on a Restriction Fragment Length Polymorphism (RFLP) test. Three characters counted/scored in the ... same Ross Sea region specimens classified individuals into two groups: one with 9 pelvic fin rays, pale ...
Meeting Document : WG-FSA-10/33 : Автор(ы): P.J. Smith (New Zealand), D. Steinke (Canada), P.J. McMillan, A.L. Stewart, S.M. McVeagh (New Zealand), J.M. Diaz De Astarloa (Argentina), D. Welsford and R.D Ward (Australia)
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Growth rates of Antarctic fur seals as indices of environmental conditions
mass at age in each year compared to the multi-year mean, that was not dependent on assumptions of ... growth rates in years of low krill availability. Biases reflecting changes in the component of the ... population available for sampling appear to invalidate the widely held assumption that inter-annual ... based on cross-sectional population samples. A new index was developed, based on the deviation of pup ...
Meeting Document : WG-EMM-01/20 : Автор(ы): K. Reid (United Kingdom)
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Further computations of the consequences of setting the annual krill catch limit to a fixed fraction of the estimate of krill biomass from a survey
biomass estimate which is set as the catch for a 20-year period. Three alternative fishing seasons are ... on Krill. The most important of these extensions is integration over the ranges of uncertainty for a ... number of the model parameters. Results are provided for the probability of spawning biomass falling ... , allows a greater catch (for the same risk of depletion) than in the case of fishing in winter. Author(s ...
Meeting Document : WG-KRILL-92/04 : Автор(ы): D.S. Butterworth, G.R. Gluckman and S. Chalis (South Africa)
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