Résultats de la recherche
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Report of the 1st and the 2nd stage of research fishing conducted by Russian Federation in SSRU 882A in 2010–2012
Abstract: In accordance with decision of CCAMLR Scientific Committee in 2010 and in 2011 years ... Russian vessel “Chio Maru 3” (“Antei” Ltd.) has been conducted research fishing of toothfish. The primary ... objective of the works in the SSRU was estimation of toothfish’s distribution density and carrying out of ... . Gordeev (Russia) Title: Report of the 1st and the 2nd stage of research fishing conducted by Russian ...
Meeting Document : WG-SAM-12/08 : Auteur(s): E.F. Kulish and I.I. Gordeev (Russia)
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An 8-year cycle in krill biomass density inferred from acoustic surveys conducted in the vicinity of the South Shetland Islands during the austral summers of 1991/1992 through 2001/2002
vicinity of the South Shetland Islands, Antarctica were re-analyzed using updated procedures for ... compensating for diel vertical migration of krill outside of the acoustic observation window. Intra-and inter ... surveys conducted in the austral summers of 1991/1992 through 2001/2002. Estimated biomass density ranged ... variability may be attributed to changes in the spatial distribution of krill relative to the survey area ...
Meeting Document : WG-EMM-03/6 : Auteur(s): R.P. Hewitt, D.A. Demer and J.H. Emery (USA)
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DEMOGRAPHIC PATTERNS OF ANTARCTIC KRILL (EUPHAUSIA SUPERBA) EXPLAIN THE SPATIAL SEGREGATION OF BALEEN WHALES (MYSTICETI) AROUND THE SOUTH SHETLAND ISLANDS, ANTARCTICA
Peninsula) and test whether whales exhibit interspecific differences in their exploitation of krill ... Ocean. We used a combination of spatial regression techniques, incorporating spatial autocorrelation, to ... model the overlap between three species of baleen whales and their krill prey. Whales exhibited ... the Antarctic Circumpolar Current. The spatial segregation of krill length-maturity stages provides an ...
Meeting Document : WG-EMM-09/33 : Auteur(s): J.A. Santora, C.S. Reiss, V.J. Loeb and R.R. Veit (USA)
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PRELIMINARY RESULTS OF TRIALS TESTING MODIFIED LONGLINE GEAR ‘TROTLINES’ IN PRESENCE OF CETACEANS IN SUBAREA 48.3
cetaceans were present. This difference increased with increasing abundance of cetaceans highlighting the ... potential of this gear to reduce cetacean depredation. 3. By-catch to catch ratio was greater by number for ... Spanish system lines when cetaceans were present during hauling. 4. A large percentage of skates caught on ... . Consequences of a move to trotlines would therefore lead to: i. Some positive benefits by reducing cetacean ...
Meeting Document : WG-FSA-08/44 : Auteur(s): R.E. Mitchell, J. Clark, P. Reyes, L. Jones, J. Pearce, C.E. Edwards and D. Agnew (UK)
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An overview and some preliminary results of a biological/oceanographic survey off the coast of East Antarctica (80-150°e) carried out in January to March 1996
Abstract: A major biological/physical survey of the waters off East Antarctica was carried out ... between January and April 1996. The focus was on the distribution and abundance of Antarctic krill in ... CCAMLR Statistical Area 58.4.1 but in addition, measurements were also made on a whole suite of ... oceanographic and biological variables over the entire survey area. This paper summarises the range of variables ...
Meeting Document : WG-EMM-96/29 : Auteur(s): de la Mare, W., Wright, S., Bindoff, N., Thiele, D., Pauly, T., Gillespie, D., Woehler, E., Nicol, S.
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Analysis of variability of krill size and fish by-catch in Japanese krill fishery based on scientific observer data
Abstract: To estimate optimal relative sample size of scientific observer data collected on ... –2008 were analysed by using a hierarchical Bayesian model. The models were composed of multistage ... -temporal variability in size structure of krill population, which is presumably derived from large ... variability of recruitment causing difficulty in predicting krill population dynamics. Variances of observer ...
Meeting Document : WG-EMM-12/68 : Auteur(s): T. Okuda and M. Kiyota (Japan)
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A system-of-equations approach to modeling age structured fish populations: the case of Alaskan red king crab, Paralithodes camtschaticus
Abstract: This paper presents a simultaneous system-of-equations approach to modeling age ... properties of a delay-difference model. The framework shares a common spawner-recruit function across age ... variable, lessening the effect of measurement errors in estimation. The dynamic features of the underlying ... effect of measurement error and improve overall estimation efficiency. A seemingly unrelated regression ...
Meeting Document : WS-CRAB-93/23 : Auteur(s): J.A. Greenberg, S.C. Matulich and R.C. Mittelhammer (USA)
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A simulation study of the method of refining the natural mortality coefficient with Champsocephalus gunnari in Subarea 48.3 used as an example
Abstract: The method of refining the natural mortality coefficient is based on the notion that ... the free component of the regression equation between the mean-weighted coefficient of natural ... . As a result of this mathematical modelling study using C. gunnari in Area 48.3 as an example, it was ... shown that the proposed method facilitates such a refinement. When a mistake is made in the choice of ...
Meeting Document : WG-FSA-91/25 : Auteur(s): P.S. Gasiukov and R.S. Dorovskikh (USSR)
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Review of Dissostichus spp. fishery in the adjacent seas of three Antarctic sectors in 2003–2010
of the Antarctic toothfish is commercially viable not only for countries which are close to the ... the Pacific and Indian sectors of the Antarctic. According to lack of data on the Antarctic toothfish ... estimation of toothfish stock and TAC values in all high-latitude Antarctic seas is necessary. From data ... available we suggest that factual stock values of the Antarctic toothfish are considerably underestimated in ...
Meeting Document : WG-FSA-13/14 : Auteur(s): A.F. Petrov (Russia)
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Continuation in the 2014/15 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 ... preliminary estimates of local biomass using Leslie depletion analyses have been obtained. Some recoveries of ... with the age-growth study by otoliths reading will allow a robust stock assessment by the end of this ... multiyear research survey. Author(s): Delegation of Spain Title: Continuation in the 2014/15 season of the ...
Meeting Document : WG-SAM-14/09 : Auteur(s): Delegation of Spain