Resultados de la búsqueda
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Homogeneity of body length composition of Antarctic krill within the commercial haul
Abstract: The homogeneity of krill length composition in commercial trawl catches (hauls) was ... investigated by comparing length compositions from different parts of the same haul. There was no significant ... difference (P>0.05) in 53 out of 60 hauls. Therefore it is concluded that sampling from one part of the ... haul provides a reasonable estimate of length composition in the entire haul as a whole. In contrast to ...
Meeting Document : WG-KRILL-90/11 Rev1 : Autor(es): T. Ichii (Japan)
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Some aspects of the relation between Antarctic krill abundance and CPUE measures in the Japanese krill fishery. (Component of SC-CAMLR-VI/BG/4)
Abstract: The history of the Japanese krill fishery is reviewed briefly. Important aspects of the ... time data may be needed to assess the density of swarms in a concentration, but may be difficult to ... record in practice, and a number of other factors may complicate any analysis. The possibility of ... indexing the extent of the krill distribution through routine oceanographic monitoring merits attention. A ...
Meeting Document : WS-KCPUE-89/03 : Autor(es): D.S. Butterworth (South Africa)
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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 : Autor(es): E.F. Kulish and I.I. Gordeev (Russia)
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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 : Autor(es): T. Okuda and M. Kiyota (Japan)
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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 : Autor(es): 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 : Autor(es): 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 : Autor(es): de la Mare, W., Wright, S., Bindoff, N., Thiele, D., Pauly, T., Gillespie, D., Woehler, E., Nicol, S.
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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 : Autor(es): 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 : Autor(es): 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 : Autor(es): A.F. Petrov (Russia)