Search results
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Status of the Polish FIBEX acoustic data from the West Atlantic
Paper Title: Status of the Polish FIBEX acoustic data from the West Atlantic Abstract ... acoustic target strength estimates of krill (SC-CAMLR, 1991a). This analysis indicated that the acoustic ... densities of krill in the oceanic parts of the Drake Passage were low (3 g m-2); however, the results also ... indicated that spatial variability was important and that parts of the shelf to the north of the South ... calibration at the time of FIBEX (BIOMASS, 1986). Calibration was undertaken on two separate occasions; the ... markedly from that of the Polish FIBEX MVBS values stored at the BIOMASS Data Centre which were heavily ... increase in density (4.86) derived from the assessment of all FIBEX cruises that collected data at 120 ... of krill advection within the region. At a smaller scale, however, such fluxes may not be minimised ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 125–132 : Author(s): Trathan, P.N., J. Kalinowski and I. Everson
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Distribution and size–age composition of Antarctic krill (Euphausia superba) in the South Orkney Islands region (CCAMLR Subarea 48.2).
Paper Title: Distribution and size–age composition of Antarctic krill (Euphausia superba) in the ... composition and biological condition of Antarctic krill (Euphausia superba) caught by the Russian krill ... distribution of size–age groups in association with particular water masses indicated that age 2+ krill ... dominated in cold Weddell Sea waters in the southern parts of the fishing area, while older age classes (3 ... composition of krill differed between 2009 and 2010 (Figure 6). In early January 2009, pre-spawning krill at ... stage VII in March (Figure 7b). Females at stage IV in January comprised less than 5% of all females ... an earlier stage of maturity than females. The pro- portion of males at stage IV decreased from about ... . Melnikov and Spiridonov (1996) reported consid- erable densities of E. superba larvae at older fur- cilia ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 123–134 : Author(s): Sologub, D.O. and A.V. Remeslo
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Quantifying movement behaviour of vessels in the Antarctic krill fishery
Paper Title: Quantifying movement behaviour of vessels in the Antarctic krill fishery Abstract ... / Description: Ten years of recent fine-scale haul-by-haul krill data were used to characterise the behaviour ... of the krill fishery. Analysis of distance between hauls in relation to their catch level revealed a ... number of fishing grounds within this area. The same patterns were observed for vessels from other ... krill fishing operations and the ecosystem will need to capture, at least, the important dynamics of ... within the CAMLR Convention Area (Kawaguchi and Nicol, 2007). At the end of each fishing season, each ... ). Figure 1 is a schematic diagram of how the fac- tory operates on a conventional krill trawler. At the ... reservoir, resulting in a volume (Rn) of the initial catch. As the factory tries to operate at an ‘Optimal ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 131–148 : Author(s): Kawaguchi, S. and S.G. Candy
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The Soviet krill fishery in the Atlantic Sector of the Antarctic from 1977 to 1991: fishing effort distribution and interannual patterns
and 1982. The krill fi shery oper- ated in Subarea 48.1 from January to April, and then the fl eet moved ... Paper Title: The Soviet krill fishery in the Atlantic Sector of the Antarctic from 1977 to 1991 ... fishery in the Atlantic Sector of the Antarctic from 1977 to 1992 are discussed. The total fishing effort ... from 1977 to 1991 was 50 086 vessel-days fished, in Subareas 48.3 (45% of the total for the period ... ), 48.2 (36%) and 48.1 (19%). Three distinct patterns in the distribution of monthly fishing effort ...
Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 1–13 : Author(s): Litvinov, F.F., V.A. Sushin, G.A. Chernega and O.A. Berezhinsky
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Preliminary appraisal of Antarctic fish selection by the 32/36 bottom trawl combined with various codends
Paper Title: Preliminary appraisal of Antarctic fish selection by the 32/36 bottom trawl combined ... with various codends Abstract / Description: Selectivity properties of single and doubler-layer twine ... codends (mesh size 120 mm) and single-layer tape codends with a mesh size of 60 and 100 mm were determined ... . It was found that the selectivity properties of twine codends are unsatisfactory in the case of ... 500 kilograms of fish, the investigated species constituted at least 20% of the total catch ... why small fish with lengths of 16-33 cm were retained at the same, equally high level in the double ... of small fish with a length of 20 and 21 cm at a 40-50% level and fish with a length of up to 35 cm ... first, depicting retention properties of fish up to 34 cm in. length at a - 12 - relatively high ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 1-48 : Author(s): Zaucha, J.
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Fishing for toothfish using pots: results of trials undertaken around South Georgia, March–May 2000
Paper Title: Fishing for toothfish using pots: results of trials undertaken around South Georgia ... , March–May 2000 Abstract / Description: During the period March to May 2000, the UK undertook trials of ... commercial viability of this fishing method for toothfish fisheries in the CCAMLR Convention Area. While the ... method successfully caught D. eleginoides, there was a large by-catch of crab species. The catch rate of ... , mostly at the start of the trials, before the correct gear and methodology had been established. Bait ... . The number and percentage of female Pnrnlornis crabs at different maturity stages are shown in Table ... examine alternative pot designs and methods of increasing toothfish catch rates at the same time as ... possibility of retaining legal-sized crab by-catch and fishing at all times of the year. This is possible ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 93–105 : Author(s): Agnew, D.J., T.M. Daw, G.M. Pilling and M.G. Purves
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Discrimination of Macrourus whitsoni and M. caml (Gadiformes, Macrouridae) using otolith morphometrics
; and (iii) the area under the receiver oper- ating characteristic (ROC) curve (Swets, 1988). ROC analysis ... Paper Title: Discrimination of Macrourus whitsoni and M. caml (Gadiformes, Macrouridae) using ... otolith morphometrics Abstract / Description: That the predominant by-catch of grenadier by the toothfish ... fishery in the Ross Sea region is comprised of two species, rather than being solely Macrourus whitsoni ... , was recognised in 2010 with the identification of a new species, M. caml. Grenadier are the main by ...
Science Journal Paper : CCAMLR Science, Volume 22 (CCAMLR Science, Volume 22) : 15–28 : Author(s): Pinkerton, M.H., C. Ó Maolagáin, J. Forman and P. Marriott
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Distribution, biomass and characteristics of the Euphausia superba fishery around South Georgia (Subarea 48.3)
Paper Title: Distribution, biomass and characteristics of the Euphausia superba fishery around ... many aspects of its variability have been extensively described in scientific literature. A summary of ... variability and the wide range of biomass values obtained which in turn leads to uncertainty in interpreting ... variability in the scale of krill swarms and to attempt to determine more reliable values of its biomass after ... transport krill to the South Georgia area which is located at the northern edge of its habitat (Marr, 1962 ... result of South Georgia being located at the edge of the habitat area in unusually low latitudes for ... trawl was employed at each station. The cross-section of the trawl opening at the level where fine mesh ... density of E. superba in fished swarms (g/m3) was worked out according to the size of the catch taken at ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 123–147 : Author(s): Latogursky, V.I., R.R. Makarov and L.G. Maklygin
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On the instantaneous natural mortality rate of Champsocephalus gunnari, South Georgia (Subarea 48.3)
Paper Title: On the instantaneous natural mortality rate of Champsocephalus gunnari, South ... Georgia (Subarea 48.3) Abstract / Description: The instantaneous rate of natural mortality (M) of ... composition of catches from 1964/65 to 1968/69 and the age/length key for the first half of 1972 were used in ... the calculations. The results provided a wide range of estimates for M. The discussion of the results ... address the question once again in 1990 at the Ninth Meeting of CCAMLR. Taking the above factors into ... values M is taken to be the one at which the estimate of the independent parameter a is close to zero ... independent of time at which data on size composition was collected. Size composition components are ... done at various levels of natural mortality which were used to construct the following regression ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 313–326 : Author(s): Frolkina, G.A. and R.S. Dorovskikh
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Distribution and abundance of Macrourus carinatus on BANZARE Bank in the southern Indian Ocean
in the Catalan Sea (western Mediterranean) below a depth of 1 000 m. Journal ofNatural History, 26: 197-213 ... Paper Title: Distribution and abundance of Macrourus carinatus on BANZARE Bank in the southern ... Indian Ocean Abstract / Description: This paper provides an assessment of the distribution and abundance ... of Macrourus carinatus on BANZARE Bank in the southern Indian Ocean (Divisions 58.4.1 and 58.4.3 ... ) based on results from a trawl survey in 1999. This is the first quantitative assessment of M. carinatus ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 171–178 : Author(s): van Wijk, E.M., A.J. Constable, R. Williams and T. Lamb