Resultados de la búsqueda
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Some aspects of the by-catch fish spawning and oogenesis
Antarctic toothfish fishery from 2002 till 2008 in different areas of the Southern Ocean (Collaboration Sea ... Abstract: On the basis of the biological material collected on some by-catch fishes during ... continental shelf at depth of 300-600 m during summer season (may be autumn for sp. X) of the southern ... hemisphere, generally. Probably, the significant part of C. dewitti mature females missed spawning, and the ...
Meeting Document : WG-FSA-10/51 : Autor(es): V. Prutko (Ukraine) and D. Chmilevsky (Russia)
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A conceptual model of the krill fishery
Abstract: The behaviour patterns of Japanese krill fishery vessels in Area 48 were analysed using ... questionnaires on the reasons why the vessel changed their fishing grounds, which were sent out to of the ... , krill density, krill, size, ice condition, transshipment, and salp-by catch accounted for 95.6% of the ... factors such as greenness or ice condition could become important. A general picture of the seasonal ...
Meeting Document : WG-EMM-04/51 : Autor(es): S. Kawaguchi, S. Nicol (Australia), K. Taki and M. Naganobu (Japan)
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A biomass estimate of Antarctic krill (Euphausia superba) at the Balleny Islands
Abstract: The biomass of Antarctic krill (Euphausia superba) at the Balleny Islands, Antarctica ... data processing followed the recommendations of CCAMLR SG-ASAM. Two parameterisations of the krill ... acoustic target strength model were used. The first parameterisation assumed a vertical orientation of ... (coefficient of variation, CV = 0.37), whereas biomass using θ=N(-20,28) was 13.75 kilotonnes (CV = 0.14). The ...
Meeting Document : WG-EMM-15/17 Rev. 1 : Autor(es): M.J. Cox (Australia), Y. Ladroit, P. Escobar-Flores and R.L. O’Driscoll (New Zealand)
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Design of the used on Russian vessels Sparta and Chio Maru No. 3 bottom trot-line for toothfish fishing
Abstract: This work is prepared in accordance with recommendation of 4.18 WG-SAM-12 about ... №3”. The trotline of a special design that was used is formed of main floating line and fastened ... catching of VME-organisms to a large extent, because at the presented design of a longline each line with a ... the body because of the shortened snood. Author(s): I.G. Istomin, V.V. Akishin, V.A. Tatarnikov and ...
Meeting Document : WG-FSA-12/22 : Autor(es): I.G. Istomin, V.V. Akishin, V.A. Tatarnikov and I.I. Gordeev (Russia)
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Indices of prey availability near the Seal Island CEMP site: 1990 through 1996
Abstract: Four indices of prey availability are calculated for prey surveys conducted in the ... vicinity of the Seal Island CEMP site during the austral summers of 1990-96. The indices are measures of ... AMLR surveys each year were sub-sampled to include the foraging range of predators breeding at Seal ... Island. The average depth of the prey field and its average distance from Seal Island were positively ...
Meeting Document : WG-EMM-96/22 : Autor(es): Hewitt, R.P., Demer, D.A., Watters, G.
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Analysis of scientific observer data from the Saga Sea 2006–2007
distribution of these trawls in time and space was not random. The vessel tended to fish with one trawl type ... Abstract: UK observers were present during all fishing operations of the Norwegian flagged Saga ... Sea from June 2006 to June 2007. This paper presents an initial analysis of the krill and fish bycatch ... sampled. Although a reasonably large number of continuous and conventional trawls were undertaken, the ...
Meeting Document : WG-EMM-07/16 : Autor(es): P. Orr, J. Hooper, D. Agnew, J. Roe, G. Doherty and A. Pryor
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Genetic analysis of Antarctic toothfish samples from the Southern Ocean to explore potential stock boundaries
restriction enzyme digests of nine sub regions of the mitochondrial genome. Polymorphisms were found in four ... out of seven introns digested with the restriction enzymes, but there was no population ... differentiation among the three sea areas. While direct sequencing of cytochrome b (665 base pair) showed ... virtually no variation, sequences for ~600 bp of the left domain of the control region showed nucleotide ...
Meeting Document : WG-FSA-04/32 : Autor(es): P.J. Smith, S.M. McVeagh (New Zealand) and P.M. Gaffney (USA)
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Draft MPA Report for the South Orkney Islands, Subarea 48.2; Part of CCAMLR MPA Planning Domain 1, Western Peninsula – South Scotia Arc
Abstract: In this paper we provide a brief history that describes the development of management ... plans and research and monitoring plans for CCAMLR MPAs. We develop a worked example of the management ... the information necessary for CCAMLR’s planning purposes, including the identification of other ... develop spatial protection measures is through the appropriate combination of scientific data and ...
Meeting Document : WG-EMM-13/10 : Autor(es): P. Trathan and S. Grant (United Kingdom)
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Effects of sea-ice extent and krill or salp dominance on the Antarctic food web
trophic levels in the Antarctic marine food web. The pelagic tunicate Salpa thompsoni can also be ... important during spring and summer through the formation of extensive and dense blooms. Although salps are ... chlorophyll-a that indicate that there is a degree of competition between krill and salps. Our analysis of the ... decreased frequency of winters with extensive sea-ice development over the last five decades. Our data ...
Meeting Document : WG-EMM-97/73 : Autor(es): Hewitt, R., Trivelpiece, S., Fraser, W., Holm-Hansen, O., Siegel, V., Trivelpiece, W., Loeb, V.
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Modelling growth of Antarctic krill: a new approach to describing the growth trajectory
Abstract: Von Bertalanffy (VB) growth models for Antarctic krill have in the past been calibrated ... frequency samples. We develop an alternative approach to predicting the trajectory of length over time using ... from direct measurements of individual pre- and post-moult krill sampled from the wild with a model of ... from the Indian Ocean sector we model IGR as a function of pre-moult length and season using linear ...
Meeting Document : WG-EMM-05/27 : Autor(es): S. Candy and S. Kawaguchi (Australia)