Search results
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In situ target strength measurements of Antarctic zooplankton (Euphausia superba and Salpa thompsoni) at 120 khz and 200 khz, corroboration of scattering models, and a statistical technique for delineating species
Abstract: In-situ measurements of target strength (TS) were made of Antarctic zooplankton ... the 200 kHz single-beam data. The backscattering cross-sectional areas (σbs) of salps are shown to fit ... scattering is from each animal's spheroidal nucleus. Consistent with the measurements of encaged krill ... (5):2985-2988 (1993)], the TS of in-situ krill are shown to fit a deformed cylinder model [T.K ...
Meeting Document : WG-Krill-94/12 : Author(s): D.A. Demer and R.P. Hewitt (USA)
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The importance of sea ice association of Antarctic krill for transport and retention in the South Orkneys region: a modelling study
Abstract: The South Orkney Islands region is a key location for understanding the distribution of ... the local ecosystem dynamics in this key region requires greater understanding of the extent to which ... krill- sea ice interactions influence the local distribution and retention of krill. Here we present ... results from a modelling study that suggest that the use of the sea ice habitat by krill affects the ...
Meeting Document : WG-EMM-2019/21 : Author(s): S.E. Thorpe, E.F. Young, E.J. Murphy and A.H.H. Renner
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Analysis of longline fleet operation on the Patagonian toothfish (Dissostichus eleginoides) in the subarea of the South Georgia Island (48.3) in 1989–2003
Abstract: The main characteristics of Patagonian toothfish (Dissostichus eleginoides) catch ... . Taken the intensity of fleet operation as an example in the sub-area, it was confirmed a decrease in ... decrease in catch per unit value and necessity of the more attentive approach to the assessment of the ... state of the toothfish population in this area of traditional fishing and more precautionary approach to ...
Meeting Document : WG-FSA-03/98 : Author(s): N.V. Kokorin and A.F. Petrov (Russia)
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Fish Heaven 2.0: summary of modifications and additions to earlier versions and illustrations of its application as a tool for evaluating fisheries management systems
examples of its application as a tool for evaluating fisheries management systems. As in previous years ... there have been numerous small changes and additions to the functionality of the program. This note ... range of models to be constructed and explored. The application of Fish Heaven as an evaluation tool is ... illustrated by some examples of how Catch Per Unit Effort performs as an indicator of abundance under simple ...
Meeting Document : WG-FSA-SAM 03/15 : Author(s): I. Ball (Australia)
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Progress towards validation of ageing of Dissostichus eleginoides using otoliths
, fish have been treated with strontium to mark their otoliths for validation of subsequent age ... . Results indicate that current methods for ageing D. eleginoides are appropriate: the number of observed ... annuli on the otoliths after the strontium mark was consistent with the time at liberty of the fish after ... determination in this species: investigating the accuracy of ageing small fish (1000 days; and developing ...
Meeting Document : WG-FSA-04/67 : Author(s): K. Krusic-Goluband R. Williams (Australia)
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Distribution and biological characteristics of two toothfish species of genus Dissostichus (family Nototheniidae) off Bouvet Island
) toothfish, were registered during the fishery on Dissosyichus spp. on the shelf edge and slope of Bouvet ... surrounding the island. The vertical distribution of two species was differentiated distinctly, with the ... crossover point at depth of 1300 m. For both species the size and weight compositions were studied; indices ... of stomach fullness and qualitative diet composition as well as maturation stages of gonads and their ...
Meeting Document : WG-FSA-11/17 : Author(s): A.F. Petrov (Russia)
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Examination of the gut contents of Patagonian toothfish (Dissostichus eleginoides) from the toothfish pot fishery trials around South Georgia
CCAMLR, an understanding of the trophic relationships of exploited species is vital. Toothfish ... the trophic relationships of this species, stomach analyses were performed on individuals caught ... individuals were examined and their stomach contents identified. The proportion of individuals found with ... sizes. This was hypothesised to result from fish caught in pots suffering reduced levels of trauma. The ...
Meeting Document : WG-FSA-00/25 : Author(s): G. Pilling, T. Daw, M. Purves, D. Agnew and J. Xavier (United Kingdom)
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THE SELECTION OF TRIPS BASED ON DATA METRICS FOR THE ASSESSMENT OF ANTARCTIC TOOTHFISH IN THE ROSS SEA
Abstract: A dataset for the 2009 assessment of Antarctic toothfish (Dissostichus mawsoni) in the ... Ross Sea Region was selected on the basis of data quality metrics for individual trips. Initial ... informative datasets were selected comprising trips with high (above median) rates of recovery of previously ... dataset. Where the initial informative dataset was selected comprising trips with above median rate of tag ...
Meeting Document : WG-FSA-09/35 : Author(s): D.A.J. Middleton (New Zealand)
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History of development and completion of tasks put forward by WG-EMM (2001/02)
Abstract: A history of development and completion of tasks put forward by WG-EMM is summarised ... records since the adoption by WG-EMM in 2001 of a new five-year plan of work. A history of tasks for the ... period from 1995 to 2001 is archived in WG-EMM-02/12. Author(s): Secretariat Title: History of ... development and completion of tasks put forward by WG-EMM (2001/02) Approval: Approved ...
Meeting Document : WG-EMM-03/23 : Author(s): Secretariat
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Features of growth of young Weddell seal
Abstract: Features of behavior, birthing process, pups nursing of Weddell seals were studied ... . Studies of the growth (at birth to 21 days age) of young seals were conducted. Seven seals born in the ... every three days. The live weight was determined by using the obtained data in different periods of ... : Features of growth of young Weddell seal Approval: Approved ...
Meeting Document : WG-EMM-12/21 : Author(s): A. Salhanskyy (Ukraine)