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1. Bias in acoustic biomass estimates of Euphausia superba Dana to diel vertical migration

   results of qualitative and quantitative hydroacoustic surveys which are conducted with a down-looking ... estimates of biomass distribution and abundance, a time-depth-density analysis was performed. Data for this ... covered a 105 by 105 n.mile study area centered on Elephant Island; the second and third surveys covered a ... 60 by 35 n.mile area immediately north of Elephant Island; the fifth survey covered a 1 n.mi.2 area ...

   Meeting Document : WG-KRILL-93/48 : Autor(es): D.A. Demer and R.P. Hewitt (USA)

2. Bioregionalisation: some key questions and considerations

   Abstract:  Bioregionalisation is a process to classify data on a range of environmental ... , biological and ecological attributes, resulting in a spatial framework that can be used as a planning tool ... must address a range of technical questions relating to the development and use of appropriate methods ... relating to the context, focus and products of a bioregionalisation analysis. Author(s):  S. Grant, A ...

   Meeting Document : WS-BSO-07/11 : Autor(es): S. Grant, A. Clarke, P.N. Trathan and H.J. Griffiths (UK)

3. Preliminary results of pop-up satellite tag study on Antarctic toothfish in the Mawson Sea

   Abstract:  Preliminary results of a pop-up satellite tag (PSAT) on large Antarctic toothfish are ... described in this report. The toothfish was caught in the Mawson Sea in Feb 2015 and released with a PSAT by ... a Korean scientific observer. The same observer recovered the fish a year later. The days of liberty ... were over a year (366 days). The vertical movement of the fish shows strong and contrasting patterns ...

   Meeting Document : WG-FSA-16/08 : Autor(es): Delegation of the Republic of Korea

4. Research concept on catchability to study toothfish abundance/stocks in the Antarctic marine areas

   CPUE data. But calculation of toothfish abundance with using these methods demands a number of ... present a method approach concerning possible use of a bottom trawl survey to estimate a minimum ... guaranteed toothfish abundance value on a designated marine area. This provide a valuable reference data ... , which can be used to assess a direct indicative catchability of longlines. Author(s):  K. Demianenko, L ...

   Meeting Document : WG-SAM-18/19 : Autor(es): K. Demianenko, L. Pshenichnov, O. Diripasko and V. Gurianov

5. Future work of the Working Group on Ecosystem Monitoring and Management and implications for the format of its meetings

   is provided by a yield model,which assumes a freely distributed krill population, homogeneously ... the information necessary to implement amore robust ecosystem approach to management. A strategic plan ... progresshas been made on a number of contributing initiatives. WG-EMM currently considers awide range of ... information in order to derive a qualitative description of the status of theecosystem and appropriate ...

   Meeting Document : SC-CAMLR-XIX/06 : Autor(es): Convener WG-EMM

6. Modelling the consequences of Antarctic krill harvesting of Antarctic fur seals

   ). A single species yield model is currently being used by the CCAMLR Scientific Committee to recommend ... an annual krill catch limit, which is expressed as a proportion (??= 0.116) of a survey biomass ... estimate. This approach takes the needs of predators into account in only a crude way by assuming that a ... predators. A krill-predator modeling procedure is presented that could be used to directly assess the impact ...

   Meeting Document : WG-EMM-01/66 : Autor(es): R.B. Thomson, D.S. Butterworth (South Africa), I.L. Boyd and J.P. Croxall (United Kingdom)

7. The Patagonian toothfish: biology, ecology and fishery

   Abstract:  Patagonian toothfish (Dissostichus eleginoides) is a large notothenioid fish that ... toothfish are a long-lived species (> 40 years), which initially grow rapidly on the shallow shelf areas ... , biochemistry, parasite fauna and tagging indicate a high degree of isolation between populations in the Indian ... . 1000 m) during the austral winter, producing pelagic eggs and larvae. Larvae switch to a demersal ...

   Meeting Document : WG-FSA-10/P05 : Autor(es): M.A. Collins, P. Brickle, J. Brown and M. Belchier

8. Results of the fifth Ross Sea shelf survey to monitor abundance of sub-adult Antarctic toothfish in the southern Ross Sea, February 2016, and notification for continuation in 2017

   Abstract:  At its 2011 meeting, the Scientific Committee agreed that a time series of relative ... abundance from a well-designed survey could be a useful input into the Ross Sea stock assessment model. The ... results of the fifth survey in the time series. The objectives of this survey were: (1) to continue a time ... 881.L in the southern Ross Sea (Strata A–C) using standardised gear in a standardised manner; and (2 ...

   Meeting Document : WG-SAM-16/14 : Autor(es): A. Dunn, C. Jones, S. Mormede and S. Parker

9. Cruise Report – Research Project: Demersal finfish distribution, abundance, and their biological characteristics in Statistical Subareas 48.1 (northern area) and 48.2

   Abstract:  A finfish survey was completed using bottom trawl fishing gear according to a random ... , 2012) and on shelf areas of the South Orkney Islands according to a subsample of stations sampled by ... , 2018, primarily using a Hardbottom Snapper trawl (NET Systems, Inc.), previously used by the US AMLR ... Program, Southwest Fisheries Science Center, National Marine Fisheries Service. A total of 36 hauls were ...

   Meeting Document : WG-SAM-18/25 : Autor(es): Delegation of Chile

10. Descriptive analysis of acoustic data collected during the 2003 exploratory fishery for toothfish in the Ross Sea

    Abstract:  This report presents results from a pilot study to determine the feasibility of ... issues with data quality were interference from another echosounder, and the occurrence of a double ... bottom echo caused by too high a ping rate. All line recordings were in water over 1000 m deep. Because ... deadzone would be over 50 m high for a sea-bed with a slope of 20º. The problem of the acoustic deadzone ...

    Meeting Document : WG-FSA-03/28 : Autor(es): R.L. O’Driscoll and G.J. Macaulay (New Zealand)

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