Résultats de la recherche
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Marine debris and fishing gear associated with seabirds at sub-Antarctic Marion island, 1996/97 and 1997/98: in relation to longline fishing activity
most frequently in association with wandering albatross nests, while 'other' (non-fishing ... Paper Title: Marine debris and fishing gear associated with seabirds at sub-Antarctic Marion ... debris found in association with seabirds at sub-Antarctic Marion Island for the period May 1996 to April ... and the 1997/98 field seasons. Fishing gear increased at a rate 10 times higher than 'other' ... with these seabirds at their breeding colonies is a non- destructive sampling technique that can ... consistently collected all narine debris found, we do not expect that there will be any bias in the ... fisheries-related items). It should be noted that the work routines during the two field seasons were very ... follows a decrease in body size, and can be explained by the fact that most of the fishing gear found on ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 85–96 : Auteur(s): Nel, D.C. and J.L. Nel
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To the question for bioregionalisation of the Antarctic waters with ecosystem approach
resources to determine by position of the South Ocean and originaly it's geographic isolation unity ... , Coastal and Open sea areas, with proper scheme of the currents, composition of bioresources species and ... good isolation ecosistem. In my book (Shust,2001), take into account the general geological and ... be use today for Bioregionalisation of the South Ocean. Author(s): Delegation of Russia Title: To ...
Meeting Document : SC-CAMLR-XXV/BG/18 : Auteur(s): Delegation of Russia
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Variations in echosounder calibration with temperature, and some possible implications for acoustic surveys of krill biomass
therefore be made to ensure that echosounders are calibrated at temperatures as close as possible to those ... Paper Title: Variations in echosounder calibration with temperature, and some possible ... which suggest that echosounder transducer performance is dependent on ambient water temperature. Highly ... European calibration parameters were to be employed during surveys around South Georgia, and no account ... under-estimation of krill biomass by 52.5%. Every effort should therefore be made to ensure that ... that the materials used to construct transducers made them susceptible to changes in character with ... temperature, and suggested that many of the transducers then used in fishery acoustics would not be stable ... frequency may simply be a function of the increased variance associated with the 200 kHz calibrations ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 273–281 : Auteur(s): Brierley, A.S., C. Goss, J.L. Watkins and P. Woodroffe
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Modelling growth of Antarctic krill: growth trends with sex, length, season, and region
Abstract: Growth trends of Antarctic krill with sex, length, season and region using over 10 ... years accumulation of instantaneous growth rate (IGR) measurements were modelled using a Linear Mixed ... the IGR with increasing size was generally observed. This trend decreased from summer to autumn with ... growth was December in Indian sector, whereas in the Scotia Sea sector it appeared to be a few months ...
Meeting Document : WG-EMM-05/29 : Auteur(s): S. Kawaguchi, S. Candy, R. King (Australia), M. Naganobu (Japan) and S. Nicol (Australia)
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Calibration of an acoustic echo-integration system in a deep tank, with system gain comparisons over standard sphere material, water temperature and time
Paper Title: Calibration of an acoustic echo-integration system in a deep tank, with system gain ... outlines the theory and procedures for calibrating an echo integration acoustic system with a standard ... sphere. It presents the results of an extensive calibration of a Simrad EK500 scientific echosounder with ... with the Cu sphere are, with the exception of the long pulse length, lower than those from the WC ... be performed with no effect from the water column boundaries so that only spherical waves reflecting ... different than that used in the actual deployment. It may be tested with a different transmission cable ... between the individual transducer leads and the cable screen. These resistances should be measured with ... frequency, the true impedance with the cable attached may be significantly different. As electronic ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 127–144 : Auteur(s): Demer, D.A. and R.P. Hewitt
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Incidental mortality of seabirds associated with longline fishing in Subarea 48.3 – preliminary results of scientific observations onboard the Chilean longliner, Puerto Ballena, from March to May 1996
should be regarded as tentative as there rue still problems associated with extrapolating observed ... observations on the by-catch of seabirds during a cruise of the Chilean longliner 'Puerto Ballena' in ... released alive. Our preliminary analysis confirmed results from last year that black-browed albatrosses are ... setting of lines had been restricted to nighttime as required in order to comply with Conservation Measure ...
Meeting Document : WG-FSA-96/31 : Auteur(s): Selling, J., Kock, K.-H.
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Relationships of Antarctic krill (Euphausia superba Dana) variability with westerlies fluctuations and ozone depletion in the Antarctic Peninsula area
that the mean of krill stock densities after the 1984/85 decreased drastically as compared with that ... . The association of krill variability with westerlies and ozone depletion suggests that it is of ... variability of krill recruitment and stock density with hypothesised environmental factors. We demonstrated ... -level pressure gradients across Drake Passage during 1982-1993. The years with high pressure gradients ...
Meeting Document : WS-AREA 48-98/5 : Auteur(s): M. Naganobu, K. Kutsuwada, Y. Sasai and S. Taguchi (Japan)
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The foraging range of Adelie penguins – implications for CEMP and interactions with the krill fishery
and return with krill. The pattern of foraging is similar between sites. The potential for overlap ... with the krill fishery occurs where ice conditions permit the fishing fleet to cross onto the ... continental shelf. Observations at Casey and Dumont D'Urville from one season suggest such an overlap may ... not occur at these sites in normal ice years. It is suggested that an understanding of the potential ...
Meeting Document : WG-EMM-96/69 : Auteur(s): Rodary, D., Thomson, R., Tremont, R., Lawless, R., Gardner, H., Wienecke, B., Clarke, J.R., Kerry, K.R., Corsolini, S., Eberhard, S.
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Krill stock evaluation with data from commercial fishing vessels
been demonstrated. Here we show that acoustic data of good quality can be collected by observers on ... with commercial vessels should be aimed at. Author(s): G. Skaret (Norway), J. Moir Clark (United ... patterns and diel and seasonal behavior of krill. Based on the last years experience with the Norwegian ... krill fishing vessels and previous experience in own waters we advocate that increased collaboration ...
Meeting Document : WG-EMM-12/63 : Auteur(s): G. Skaret (Norway), J. Moir Clark (United Kingdom), O.R. Godø, R.J. Korneliussen, T. Knutsen, B.A. Krafft and S.A. Iversen
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The foraging range of Adélie penguins – implications for CEMP and interactions with the krill fishery
Paper Title: The foraging range of Adélie penguins – implications for CEMP and interactions with ... feeding chicks regularly travelled up to 120 km offshore to the continental shelf and returned with krill ... , Euphausia superba. Locations of penguins on foraging trips were compared with historical records of fine ... -scale krill catch data for the regions of interest. The potential for overlap with krill fishing occurs ... travelled southeast appeared to be feeding within a large polynya associated with the Drygalski Ice ... overlap of penguin foraging areas with any krill fishery that extends to the edge of the continental ... Antarctic coastline. At Mawson it is clear that there is potential for overlap with the fishery. At Davis ... is to be contemplated, then consideration should be given to demonstrating that the penguins forage ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 75–87 : Auteur(s): Kerry, K.R., J.R. Clarke, S. Eberhard, H. Gardner, R.M. Lawless, S. Corsolini, S. Focardi, E. Franchi, D. Rodary and R. Thomson