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Comparative studies on the biological and acoustical properties of krill aggregations (Euphausia superba Dana) samples during the XIII Italian Expedition to the Ross Sea (December 1997–January 1998)
(December-January 1997-98), for biological validation of hydroacoustic recordings, 35 net samplings were ... carried out. For all hauls both parameters: biological (length AT, sex and maturity stage of the gonads of ... the Euphausia superba) and acoustical (differences in volume back-scattering strength of krill ... aggregations MVBS at 38, 120 and 200 kHz) were examinated. Comparing the depth of the net and acoustic ...
Meeting Document : WG-EMM-00/39 : Автор(ы): M. Azzali, J. Kalinoswki, G. Lanciani and I. Leonori (Italy)
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Major fishery events in Kerguelen Islands: Notothenia rossii, Champsocephalus gunnari, Dissostichus eleginoides – current distribution and status of stocks
Abstract: The large-scale trawl exploitation targeting virgin stocks of marbled notothenia ... fishing fleet of the fishing grounds in the early 1970’s. The fishery shifted to icefish (Champsocephalus ... banks resulted in the sharp decline in the catches of marbled notothenia. The creation of the French EEZ ... in 1978 closed the free fishery but did not stop the reduction of the biomass of exploited stocks ...
Meeting Document : WS-MPA-11/P04 : Автор(ы): G. Duhamel, P, Pruvost, M. Bertignac, N. Gasco and M. Hautecoeur
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Dynamics of Notothenia rossii rossii size-age structure on the Kerguelen Islands shelf
Abstract: Basing on materials of research expeditions and fishing cruises to the Kerguelen ... Islands shelf in the period from 1970 to 1991, dynamics of size- age structure of marbled rockcod ... used to characterise the age composition. It was determined that in the initial years of exploitation ... of the stock, the major part of catches (more than 80%) was formed by repeated spawning fish. then as ...
Meeting Document : WG-FSA-94/04 : Автор(ы): P.B. Tankevich (Ukraine)
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REVIEW OF CCAMLR ACTIVITIES ON MONITORING MARINE DEBRIS IN THE CONVENTION AREA
Abstract: CCAMLR Members monitor beached debris, entanglement of marine mammals, marine debris ... associated with seabird colonies and animals contaminated with hydrocarbons at a number of sites, primarily ... in Area 48. Overall non-fishing debris items (mostly packaging items) have made up the majority of ... debris reported from monitoring sites. Relatively large amounts of fishing items have been reported at ...
Meeting Document : WG-IMAF-09/08 : Автор(ы): Secretariat
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INVESTIGATING LENGTH AT MATURITY OF ANTARCTIC TOOTHFISH (DISSOSTICHUS MAWSONI) BASED ON SCIENTIFIC OBSERVERS’ DATA
Abstract: Through generalised linear models, the gonadosomatic index of Antarctic toothfish in ... the Ross Sea region was shown to vary with latitude, length and month. Limitations of the scientific ... observers’ staging data were highlighted and GSI is recommended as a better indicator of maturity status in ... Antarctic toothfish. Reports of histological analyses of a small number of Antarctic toothfish showed ...
Meeting Document : WG-FSA-08/48 : Автор(ы): S. Mormede, S. Parker and P. Grimes (New Zealand)
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Acoustic discrimination of southern ocean zooplankton
Abstract: Acoustic surveys in the vicinity of the sub-Antarctic island of South Georgia revealed ... the existence of a number of horizontally extensive yet vertically discrete scattering layers in the ... upper 250 m of the water column. These layers were fished with a LonghurstHardy plankton recorder (LHPR ... ) and a multiple-opening 8 m2 rectangular mid-water trawl (RMT8). Analysis of catches suggested that ...
Meeting Document : WG-EMM-97/54 : Автор(ы): Watkins, J.L., Brierley, A.S., Goss, C., Ward, P.
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Modeling the growth dynamics of Antarctic krill
examine the growth dynamics of Antarctic krill, Euphausia superba. A system of coupled, ordinary ... differential equations was developed to describe the growth of krill between 2 and 60 mm. The metabolic ... resulted in the transfer of individuals to the next highest size class (growth), whereas negative net ... of model coefficients were constructed from an analysis of field and laboratory measurements provided ...
Meeting Document : WG-EMM-96/68 : Автор(ы): Lascara, C.M., Hofmann, E.E.
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Contribution to the early life history of Channichthyidae from the Bransfield Strait and South Georgia
Abstract: Age and early growth of 5 species of Channichthyidae / Champsocephalus gunnari ... during FIBEX /February-April 1981/ and SIBEX /December-January 1983/84/. Additional material- larvae of ... to March 1980 /Fig. 1/. Length frequency distributions of the above-named species were usually ... patterns of microincrements, discernible in these otoliths under a light microscope, in most cases are ...
Meeting Document : CCAMLR/86/FA/08 : Автор(ы): W. Ślósarczyk (Poland)
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A new bathymetric compilation for the South Orkney Islands, Antarctic Peninsula (49°–39°W to 64°–59°S): insights into the glacial development of the continental shelf
Abstract: We present a new, high resolution (300 m) bathymetric grid of the South Orkney Islands ... and surrounding continental shelf, northeast of the Antarctic Peninsula. The new grid, derived from a ... compilation of marine echo-sounding data improves previous regional bathymetric representations and helps to ... visualise the morphology of the shelf in unrivalled detail. The compilation forms important baseline ...
Meeting Document : WG-EMM-14/P01 : Автор(ы): W.A. Dickens, A.G.C. Graham, J.A. Smith, J.A. Dowdeswell, R.D. Larter, C.-D. Hillenbrand, P.N. Trathan, J.E. Arndt and G. Kuhn
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Investigating the uncertainty of age determinations for Patagonian toothfish (Dissostichus eleginoides) and the implications for stock assessment
Abstract: We revised the method of Candy et al. (2012) to estimate the ageing error matrix ... (misclassification matrix) to address some issues regarding true ages not being the mode at the extremes of the ... matrix and a lack of smoothness in the probabilities for ages above 25 years. Positive errors now ... greater than the plus group are incorporated into the final row of the misclassification matrix. We ...
Meeting Document : WG-FSA-14/46 : Автор(ы): P. Burch, P. Ziegler, W. de la Mare and D. Welsford (Australia)
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