Résultats de la recherche
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Studies on zooplankton with special reference to krill from the Indian Ocean sector of the Southern Ocean
Abstract: Distribution, abundance and species composition of zooplankton collected during the ... of zooplankton community and the population density ranged fiom 650 to 7209/100 m-3 of zooplankton ... catch. Swarms of krill and salps were observed during the study period (austral summer) which were the ... prime cause for high standing stock of zooplankton. The prevailing physical parameters could be the ...
Meeting Document : WG-EMM-98/35 : Auteur(s): K.L. Bhat, R. Vijayakumar and V. Jaya Sree (India)
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RELEVANT ISSUES IN REGARDS TO THE MANAGEMENT OF ANTARCTIC KRILL FISHERIES IN AREA 48
magnitude of the scientific uncertainties and data gaps affecting the subdivision of precautionary catch ... the data obtaining process financially. The discussion of that issue at 2009 WG-EMM meeting will be ... useful in a course of the consideration a decision on a Stage 1 allocation. In addition, this meeting ... monitoring plan for krill in Area 48. Due to the high level of risk associated with maintaining the current ...
Meeting Document : WG-EMM-09/31 : Auteur(s): L. Pshenichnov and G. Milinevsky (Ukraine)
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THE ROSS SEA: A CANDIDATE FOR IMMEDIATE INCLUSION IN A NETWORK OF MARINE PROTECTED AREAS
Abstract: In the Southern Ocean fisheries are increasingly being exploited while the effects of ... populations and communities, thus confounding management. It is timely for CCAMLR to develop a network of MPAs ... , with initial inclusion of the well-researched Ross Sea, the area of the Southern Ocean having ... last stretches of the world’s oceans where sea ice remains an important part of the system. The Ross ...
Meeting Document : CCAMLR-XXVII/BG/30 : Auteur(s): Submitted by ASOC
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Short note: By-catch of fishes caught by the krill fishing vessel Niitaka Maru in the South Georgia area (August 2007)
Abstract: Scientific observation on the species composition and abundance of fishes incidentally ... from 6 August to 30 August to the north of South Georgia Is. Among 87 net hauls quantitatively examined ... 21 hauls. Among a total of 7 fish species, Myctophidae 3, Zoarcidae 1, Nototheniidae 1 and ... Channichthyidae 2, recognized, Krefftichthys anderssoni of Myctophidae occurred most frequently (38.5% of net ...
Meeting Document : WG-EMM-08/57 : Auteur(s): T. Iwami and M. Naganobu (Japan)
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Target strength of mackerel icefish (Champsocephalus gunnari) from a scattering model
backscattered target strength (TS) of six mackerel icefish (Champsocephalus gunnari) of total length 26.8–35.0 ... cm, at 38 kHz. The model used computed tomography (CT) scans of fish to determine the sound speed and ... density throughout the fish and simulated the complex interaction of the incident sound wave with the ... applicable to fish of length 26–35 cm. Existing in situ TS estimates are for smaller fish (16–26 cm) and ...
Meeting Document : SG-ASAM-09/06 : Auteur(s): G. Macaulay (New Zealand)
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THE AUTOLINE SYSTEM – AN UPDATED DESCRIPTIVE REVIEW OF THE METHOD WITH RECOMMENDATIONS TO CLARIFY CCAMLR CONSERVATION MEASURES REGULATING LONGLINE FISHERIES WITHIN THE CONVENTION AREA
discussing circumstances and scenarios occurring with the method. A definition of the fundamental unit of ... gear (a ‘line’) for longlines is proposed for the purposes of regulation and management. Current ... changes are suggested clarify understanding of these measures. The paper includes a recommendation for a ... review of Annex 41-01/B (2007) governing research within exploratory fisheries by WG-FSA with a view to ...
Meeting Document : WG-FSA-08/60 : Auteur(s): J.M. Fenaughty (New Zealand)
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A multi-frequency method for improved accuracy and precision of in situ target strength measurements
Abstract: The effectiveness of a split-beam echosounder system to delineate single scatterers and ... synchronized signals from two or more adjacent split-beam transducers of different frequencies. The accuracy of ... from one of the split-beam transducers, additional corresponding TS measurements can be collected with ... juxtaposed single-beam transducers. Both methods were utilized to extract in-situ TS measurements of ...
Meeting Document : WG-EMM-97/24 : Auteur(s): Hewitt, R.P., Soule, M.A., Demer, D.A.
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Pursuit of polynyas in the Antarctic peninsula area
influence biological activity. We pursued daily transition of coastal polynyas in the Antarctic Peninsula ... area from 1978 through 1995 using images of sea ice concentrations by the satellite microwave ... observations. A typical polynya existed off the tip of the Peninsula in 1987 and 1991. In the such years, sea ... ice cover developed extensively. Inversely, the years of the narrow sea ice cover were 1988, 1989,1990 ...
Meeting Document : WG-EMM-97/69 : Auteur(s): Kimura, N., Shibazaki, K., Matsumura, S., Naganobu, M., Okada, Y.
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Dynamics of Antarctic penguin populations in relation to inter-annual variability in sea-ice distribution
Abstract: To investigate the role of sea ice cover on penguin populations we used principal ... component analysis to compare population variables of Adélie (Pygoscelis adeliae) and chinstrap (Pygoscelis ... population size remained stable, whereas that of chinstrap penguins decreased slightly. For neither species ... apparent inverse density-dependent relationship between the number of Adélie breeding pairs and the number ...
Meeting Document : WG-EMM-96/10 : Auteur(s): Murphy, E.J., Croxall, J.P., Trathan, P.N.
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Dynamic model of krill Euphausia superba swarm
, using the 38 and 120 kHz BioSonics dual-beam hydroacoustic system, numerous swarms of krill Euphausia ... superba Dana were registered. Analysis of their physical parameters was carried out. It is known that ... . Using physical parameters of the krills' swarm (density, length), the above assumption was verified ... . It was found that the vertical density pattern of krills' swarm, with a mean density of up to ...
Meeting Document : WG-EMM-95/68 : Auteur(s): Kalinowski, J., Azzali, M.