Résultats de la recherche
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KRILLBASE: a multinational, circumpolar database of abundance of Antarctic krill and salps
, including studies in support of fisheries management and conservation. Previous versions of KRILLBASE have ... data have been collected on the abundance of the two taxa from net sampling surveys since 1926, but ... they are stored in national archives, sometimes only in archived notebooks. An international team of ... led to a series of papers since 2004 that illustrate some of its potential uses. The latest version ...
Meeting Document : SC-CAMLR-XXXV/BG/24 Rev. 1 : Auteur(s): A. Atkinson, S. Hill, H. Peat, R. Downie and L. Gerrish
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Method for rapidly assessing spatial scale of interactions of fishing gear with habitats and Antarctic marine living resources
Abstract: In 2014, the Scientific Committee noted that it needed to develop advice routinely on ... requested working groups consider how to report on these issues, which also form part of the review ... consideration. Here, we present (i) a method for automating these requirements irrespective of the data layers ... features, using bottom fishing on benthic habitats in East Antarctica. The assessment method has (i) an ...
Meeting Document : WG-FSA-15/62 Rev. 1 : Auteur(s): A. Constable, M. Sumner, J. Melbourne-Thomas and D. Welsford (Australia)
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Geographical aspects of utilising resources of krill (Euphausia superba)
Abstract: This paper presents data on the distribution of E. superba in the Atlantic sector and ... . In a number of subregions on the periphery of the Weddell Gyre (both to the north and south), as well ... as in the coastal waters of the Antarctic continent, the formation of krill aggregations is variable ... in terms of location of individual aggregations. The main difficulty with starting up a fishery there ...
Meeting Document : WG-EMM-96/05 : Auteur(s): Makarov, R.R.
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Stable isotope analysis of Southern Ocean fish tissue samples to investigate trophic linkages of Antarctic toothfish (Dissostichus mawsoni)
Atlantic, and sperm whales from the Gulf of Mexico. There was high variance in?15N and?13C values for each ... may be due to ontogentic changes in diet, and/or progressive consumption of larger individuals of the ... same species with age. There was significant residual variance in?15N and?13C values for each of the ... not explained by the isotopic composition of prey sampled in that area. This may be due to: (1 ...
Meeting Document : WG-EMM-07/19 : Auteur(s): M.H. Pinkerton, S. Bury, S.M. Hanchet and D. Thompson (New Zealand)
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Mercury concentrations of five species of Antarctic fish collected from CCAMLR Subareas 88.1 and 88.2
(NZFSA). In contrast, mean levels of mercury for D. mawsoni were 0.10 mg/kg-1 in the 1998 samples and ... 0.16 mg/kg-1 in the 2006 samples, both of which are well below the permissible level. Mercury levels ... levels were positively correlated with fish length in four of the species. Mercury levels also showed ... showed no trends with any factors for M. whitsoni. The low levels of mercury in D. mawsoni relative to ...
Meeting Document : WG-FSA-07/24 : Auteur(s): S.M. Hanchet, D.M. Tracey, A. Dunn, P.L. Horn and N. Smith (New Zealand)
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Preliminary report of sound-speed contrast and density of krill measured on board RV Kaiyo Maru
41.7mm and 1.0720gcm-3 in 2005 survey. The corresponding sound-speed contrasts of mean total length ... improve the accuracy and precision of the TS value. Since in situ and experimental TS measurements of ... ) and the other is the ratio of the sound speed in animal to that in the surrounding water (sound-speed ... still few. During Antarctic surveys of the Japanese R/V Kaiyo Maru in 2000 and 2004/ 2005, the ...
Meeting Document : WG-EMM-05/36 : Auteur(s): Y. Takao, H. Yasuma, R. Matsukura and M. Naganobu (Japan)
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Spatio–temporal dynamics of Antarctic krill fishery: identification of fishing hotspots
of the greatest fishery in Antarctic waters. Management of the fishery is based on a precautionary ... and temporal pattern of the fishery is only described in meso to macro scales (>>10 4 km 2 ... those years when the precautionary catch limit is reached. These events occur mainly in the centre of ... Abstract: Antarctic krill is a key species in the Southern Ocean food web and is also the target ...
Meeting Document : WG-EMM-16/52 : Auteur(s): F. Santa Cruz, B. Ernst and J.A. Arata
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Dates of spawning of Antarctic euphausiids
the dates of the beginning, termination and periods of high and the most intension of spawning. In the ... . The spawning of each species begins later in waters of high-latitude origin. The same connection ... exists for the period of the most intensive spawning. The termination of spawning in the waters of high ... -latitude origin is earlier then in the waters of an other type. The correlation with a geographical ...
Meeting Document : SC-CAMLR-VIII/BG/24 : Auteur(s): Delegation of USSR
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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 ... weighing cross-sections of the population were compared with measured/inferred changes in the the ... growth rates in years of low krill availability. Biases reflecting changes in the component of the ... differences in growth rate can reliably be derived from differences in the slope of a linear relationship ...
Meeting Document : WG-EMM-01/20 : Auteur(s): K. Reid (United Kingdom)
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Measurements of sound-speed and density contrasts of Antarctic krill (Euphausia superba) on board RV Kaiyo Maru
. The corresponding sound-speed contrast of krill with mean total lengths of 44.2mm was 1.011 in the ... Abstract: In order to calculate the target strength of Antarctic krill (Euphausia superba) using ... of krill were measured during the Antarctic surveys conducted by the Japanese RV Kaiyo Maru in 1999 ... Sea in January and February 2005. Sound-speed was measured using the "time of flight" method ...
Meeting Document : WG-EMM-08/56 Rev. 1 : Auteur(s): Y. Takao, H. Yasuma, R. Matsukura, K. Amakasu and M. Naganobu (Japan)