Résultats de la recherche
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Distribution and biological characteristics of two toothfish species of genus Dissostichus (family Nototheniidae) off Bouvet Island
) toothfish, were registered during the fishery on Dissosyichus spp. on the shelf edge and slope of Bouvet ... surrounding the island. The vertical distribution of two species was differentiated distinctly, with the ... crossover point at depth of 1300 m. For both species the size and weight compositions were studied; indices ... of stomach fullness and qualitative diet composition as well as maturation stages of gonads and their ...
Meeting Document : WG-FSA-11/17 : Auteur(s): A.F. Petrov (Russia)
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ANALYSIS OF ICE-FISH (CHAMPSOCEPHALUS GUNNARI) SPATIAL DISTRIBUTION FOR OPTIMIZATION OF THE BOTTOM TRAWL SURVEY SAMPLING
surveys in the South Georgia area are analyzed. The high heterogeneity of horizontal and vertical fish ... distribution in the near-bottom layers within the surveyed area is shown. Influence of this fish distribution ... estimates of varying headline height of bottom trawl and shifting trawl stations positions. Under example of ... considerable degree stipulated by heterogeneity of fish distribution in the near-bottom layer relative to the ...
Meeting Document : WG-SAM-09/20 : Auteur(s): S.M. Kasatkina (Russia)
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Consumption of krill by minke whales in Areas IV and V of the Antarctic
Abstract: The consumption of Antarctic krill (Euphausia superba) by the southern minke whale ... (Balaenoptera acutorostrata) in Areas IV and V of the Antarctic was estimated from diurnal change in the ... Whale Research Program Under Special Permit in the Antarctic) data. Estimates of the daily food ... IV were equivalent to roughly one- fourth of a total estimate biomass of krill in Area IV ...
Meeting Document : WG-EMM-97/17 : Auteur(s): Fujise, Y., Tamura, T., Ichii, T.
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In situ target strength measurements of Antarctic zooplankton (Euphausia superba and Salpa thompsoni) at 120 khz and 200 khz, corroboration of scattering models, and a statistical technique for delineating species
Abstract: In-situ measurements of target strength (TS) were made of Antarctic zooplankton ... the 200 kHz single-beam data. The backscattering cross-sectional areas (σbs) of salps are shown to fit ... scattering is from each animal's spheroidal nucleus. Consistent with the measurements of encaged krill ... (5):2985-2988 (1993)], the TS of in-situ krill are shown to fit a deformed cylinder model [T.K ...
Meeting Document : WG-Krill-94/12 : Auteur(s): D.A. Demer and R.P. Hewitt (USA)
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A generalised model for evaluating yield and the long term status of fish stocks under conditions of uncertainty
flexibility for assessing the influence of different patterns of growth, natural mortality, spawning and ... fishing on the estimates of yield per recruit. Also, it can be used to evaluate the performance of a stock ... each year by integrating a set of differential equations which incorporate functions that specify the ... rate of change or magnitude of parameters, such as growth, mortality, age dependent selectivity and ...
Meeting Document : WG-FSA-95/41 : Auteur(s): de la Mare, W.K., Constable, A.J.
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Preliminary assessment of mackerel icefish (Champsocephalus gunnari) in the vicinity of Heard Island and McDonald Islands (Division 58.5.2), based on a survey in March–April 2010, including a revised growth model
Abstract: A survey of mackerel icefish, Champsocephalus gunnari, was undertaken in Division ... 58.5.2 in the vicinity of Heard Island in March-April 2010 to provide the information for an assessment ... of short-term annual yield in the 2010/2011 CCAMLR season. This paper provides a preliminary ... assessment of yield for the area of Division 58.5.2 to the west of 79°20’ E using standard CCAMLR methods ...
Meeting Document : WG-FSA-10/12 : Auteur(s): D.C. Welsford (Australia)
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Models of larvae dispersion of Antarctic toothfish (Dissostichus mawsoni)
stock structure in the Ross Sea have parallels for populations in other regions of the Antarctic, and ... hypotheses about how stock structure is maintained may apply to each population. We provide an update of the ... circumpolar models of larval dispersion for D. mawsoni developed by Hanchet et al. (2008) using the HiGEM ... circumpolar oceanographic model documented by Rickard et al. (2010). We used a finer resolution of simulated ...
Meeting Document : WG-FSA-12/48 : Auteur(s): A. Dunn, G.J. Rickard, S.M. Hanchet and S.J. Parker (New Zealand)
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Progress report on the scientific data compilation and analyses in support of the development of a CCAMLR MPA in the Weddell Sea (Antarctica)
Abstract: This progress report represents a follow up of WG-EMM-13/22 (WG-EMM, Jul 2013 ... Working Group on Ecosystem Monitoring and Management on the actual state of our project, particularly on ... the proceeds of the data acquisition process and the preliminary scientific analysis. In addition, we ... present the report of the International Expert Workshop on the Weddell Sea MPA project (7-9 April 2014 ...
Meeting Document : WG-EMM-14/19 : Auteur(s): K. Teschke, K. Jerosch, H. Pehlke and T. Brey (Germany)
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Continuation in the 2015/16 season of the research plan initiated in 2012/13 for stocks of Dissostichus spp. in Divisions 58.4.1 and 58.4.2
Divisions 58.4.1 and 58.4.2 in order to estimate local biomass of Dissostichus spp. by means of two methods ... problems with a blade of the propeller, During the season 2015/16 is intended to make the same proposed ... been already implemented in Division 58.4.1 and preliminary estimates of local biomass using Leslie ... depletion analyses have been obtained. Some recoveries of tagged toothfish have been made, both within ...
Meeting Document : WG-SAM-15/02 : Auteur(s): Delegation of Spain
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Precision of growth band determination from eyestalk sections of Antarctic krill (Euphausia superba) preserved in formalin
feedback management of krill fisheries. Samples stored in 70% ethanol provide an opportunity to detect the ... growth bands of eyestalk sections. Moreover, information derived from samples preserved in formalin will ... common in previous decades. Out of 162 Antarctic krill individuals preserved in 5% formalin, the growth ... bands from eyestalk sections of 134 samples were readable. The relationship between the total length and ...
Meeting Document : WG-EMM-18/P16 : Auteur(s): G.P. Zhu, Y. Yang, Q. Song and H.T. Zhang