Résultats de la recherche
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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
changes are suggested clarify understanding of these measures. The paper includes a recommendation for a ... 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 ... 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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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.
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Remarks on natural mortality of Dissostichus eleginoides in Subarea 48.3
Abstract: With samples originated in the Chilean longline fishery of Dissostichus eleginoides of ... the considered cases with the different growing parameters, with the exception of the case of fishing ... sites. By other hand, when comparing the different mean values of M for the different variables, it was ... hooks N° 22. The general mean value of M calculated for the 44 analyzed situations was 0.14 ± 0.03 ...
Meeting Document : WG-FSA-92/21 Rev. 1 : Auteur(s): C.A. Moreno and P.S. Rubilar (Chile)
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Hook selectivity in the longline fishery of Dissostichus eleginoides (Nototheniidae) off the Chilean coast
fisheries of the patagonian toothfish Dissostichus eleginoides related with the selectivity of the type and ... size of hooks used in the longlines. Original data obtained during 1991 on the coast of Valdivia, South ... . The size frequency of the population collected with straight hooks No3 and 4 are not significatively ... as the number of the straight hook increases (for example from 4 to 3) or when they change from ...
Meeting Document : WG-FSA-91/11 : Auteur(s): C.A. Moreno (Chile)
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Preliminary observation about the possibility of Antarctic krill escapement from a trawl net
underwater video camera attached on the trawl net of Japanese commercial trawler Fukuei-maru (4,350.62 GT) in ... 2011. To avoid the influence of camera lighting on krill behavior, the observation was conducted during ... daytime. Few krill appeared to escape from posterior part of trawl net. When the trawl net caught dense ... krill swarms, krill escaped from anterior part of trawl net. Krill were observed to swim actively after ...
Meeting Document : WG-EMM-12/66 : Auteur(s): K. Fujita and S. Hasegawa (Japan)
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Abundance, distribution, energy density and trophic position of euphausiids during winter 2012: preliminary results from the first US AMLR Winter Survey
sampling program to better understand winter conditions affecting the productivity and survival of ... collection and analysis of water samples from fixed depths. Net tows for euphausiids and other pelagic ... zooplankton taxa are also collected. Here we present preliminary results of a first 8 day shakedown cruise ... reporting the distribution, size and properties of krill and other euphausiids and present some data on ...
Meeting Document : WG-EMM-13/40 : Auteur(s): C. Reiss and C. Jones (USA)
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Low genetic diversity and temporal stability in the Antarctic toothfish (Dissostichus mawsoni) from near-continental seas of the Antarctica
Abstract: We present our data on DNA-analysis of recent (2011-2013) samplings of Antarctic ... results, based on analysis of SNP variation of the most informative subset of nuclear genetic markers ... presented in Kuhn and Gaffney, 2008, do not support temporary stable genetic differentiation of samples from ... stability in the Antarctic toothfish (Dissostichus mawsoni) from near-continental seas of the Antarctica ...
Meeting Document : WG-FSA-13/07 : Auteur(s): N.S. Mugue, A.F. Petrov, D.A. Zelenina, I.I. Gordeev and A.A. Sergeev (Russia)
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The use of net monitoring cable in trawl fishery for krill
of using a net cable to inform crew and scientists on trawl performance. Some results from ongoing ... tests demonstrate its potential in allowing observations of trawl in relation to krill distribution and ... behaviour, including real time imaging of krill and predator behaviour in relation to fishing gear during ... experiments. Due to the vessel-and gear differences of Saga Sea and Antarctic Sea presently using the ...
Meeting Document : WG-EMM-17/47 : Auteur(s): O.R. Godø