Résultats de la recherche
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Molecular and morphological identification of Macrourus species caught as by-catch in the toothfish longline fisheries in CCAMLR Subareas 48.3 and 48.4.
at South Georgia was compared with results of morphological identifications made by scientific ... Abstract: Genetic identification of grenadiers taken as bycatch in the toothfish longline fishery ... of Macrourus were identified genetically in the Southern Ocean and confirmed the presence of a ... Northern hemisphere species, M. berglax. There is a clear latitudinal separation of Macrourus species in ...
Meeting Document : WG-FSA-12/35 : Auteur(s): E. Fitzcharles, K. Brigden, S. Gregory, M. Belchier and J. Brown (United Kingdom)
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On commercial significance of krill aggregations
with biomass density of at least 100 g/m2. This threshold value of krill commercial biomass ... estimated at 24 g/m2 (Boyd, 2001). As is evident from comparison of above density values, the fleet and ... of acoustic investigation obtained in the Soviet trawler operation areas in Subareas 48.1-48.4 were ... numbering 22000 hauls for the period of 1986-1990 and those from Ukrainian trawlers for the period of 2001 ...
Meeting Document : WG-EMM-03/31 : Auteur(s): S.M. Kasatkina (Russia)
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DISTRIBUTION AND ABUNDANCE OF ANTARCTIC TOOTHFISH IN THE ROSS SEA
grounds. There are no reliable estimates of Antarctic toothfish abundance on the shelf at the current time ... toothfish at McMurdo Sound can occupy the entire water column, but the spatial and temporal extent of its ... Abstract: This report is a synthesis of mostly existing information which has been compiled for ... the purposes of addressing items on the FEMA 2 agenda. It summarises the management of the fishery ...
Meeting Document : WG-EMM-09/40 : Auteur(s): S.M. Hanchet, S. Mormede and A. Dunn (New Zealand)
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The use of predator-derived krill length-frequency distributions to calculate krill target strength
predators to provide a length-frequency distribution of krill at times when it is possible to run automated ... krill biomass at times of the season hitherto unavailable from ship-board scientific surveys. Author(s ... ecosystem based approach to resource management. We propose a method using krill sampled from the diet of ... operations. This will allow a robust estimate of krill abundance to be estimated from acoustic data. Changes ...
Meeting Document : WG-EMM-00/42 : Auteur(s): K. Reid and A.S. Brierley (United Kingdom)
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The impact of the hake Merluccus spp. longline fishery off South Africa on Procellariiform seabirds
white-chinned petrels a year in South African waters at a rate of 0.44 birds per 1000 hooks. This ... shelf water of South Africa. Participants were required to record any birds caught, and these data were ... supplemented by ship-based observers on several vessels. Longlines are set at night, and the white-chinned ... during gear setting. Small numbers of great shearwaters Puffinus gravis and pintado petrels Daption ...
Meeting Document : WG-FSA-97/55 : Auteur(s): Boix-Hinzen, C., Barnes, K.N., Ryan, P.G.
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Diet composition of Dissostichus eleginoides in Subarea 48.3, Dr Eduardo Holmberg survey March/April 1996
Abstract: A diet analysis of the patagonian toothfish Diissostichus eleginoides in the Subarea ... 48.3 in March/April 1996 was carried out by frequency of occurrence (F%) and coefficient "Q" ... ; (%) methods. The samples consisted chiefly of immature specimens, with predominant length ranges of 30-70 cm ... (TL). Fish was by far the main food at SR and SG (63 % as sole prey). Krill appeared as secondary food ...
Meeting Document : WG-FSA-96/29 : Auteur(s): Barrera-Oro, E., Marschoff, E., Casaux, R.
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The factors causing impact on the toothfish catch estimation on board of fishing vessels
Abstract: The toothfish catch estimation on board of fishing vessels at the CCAMLR area is being ... done often in a difficult weather conditions at sea, which can cause a negative impact on the ... measurement equipment. Besides, until today the “green weight” of the toothfish catch on fishing vessels was ... not estimated directly, but by calculation, based on the weight of the production using appropriate ...
Meeting Document : WG-SAM-2019/14 : Auteur(s): K. Demianenko, P. Zabroda, I. Slypko, L. Pshenichnov, A. Bazhan, O. Diripasko and D. Marichev
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Detection of predator dive patterns from stationary echosounder data
clear patterns in the dive data with regards to time of year as well as time of day. At the temporal ... Abstract: Standard protocols for processing of echosounder data are geared towards the estimation ... of biomass indices of pelagic organisms. More transient visitors to the watercolumn however also give ... echoes, and the data provided by the echosounders may be used to assess the behaviour of these organisms ...
Meeting Document : WG-EMM-2019/34 : Auteur(s): T. Klevjer and G. Skaret
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By-catch of fishes caught by the fishery vessel Niitaka Maru in the South Georgia area (August to September 2004)
composed of at least 3 different year classes. Similar pattern is also found in Gymnoscopelus nicholsi of ... the Myctophidae. At least in the net hauls of high krill CPUE (>20t?krill/h), few or no by-catch ... by F/V Niitaka Maru (5306t) were made from August 6 to September 9, 2004 to the north of South ... Georgia Island. Among 100 net hauls quantitatively examined, a total of 12 species belonging to 6 families ...
Meeting Document : WG-EMM-05/19 : Auteur(s): T. Iwami, T. Hayashi, K. Taki and M. Naganobu (Japan)
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Indices of prey availability near the Seal Island CEMP site: 1990 through 1996
AMLR surveys each year were sub-sampled to include the foraging range of predators breeding at Seal ... compared with indices of predator performance at Seal Island. The depth of the prey field and its distance ... Abstract: Four indices of prey availability are calculated for prey surveys conducted in the ... vicinity of the Seal Island CEMP site during the austral summers of 1990-96. The indices are measures of ...
Meeting Document : WG-EMM-96/22 : Auteur(s): Hewitt, R.P., Demer, D.A., Watters, G.