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1. An evaluation of reduced target strength estimates reported for krill (Euphausia superba)

   on the same experiment and report new calculations of the target strength of krill (Euphausia superba ... ) that propose questioning previous measurements of krill target strength and estimates of abundance ... assumptions made in calculating target strength. Whether the results of these papers are valid is critically ... important, given that they are being cited as a basis for increasing the estimates of krill standing stock ...

   Meeting Document : WG-KRILL-90/13 : Автор(ы): M.C. Macaulay (USA)

2. Distribution, abundance and acoustic properties of Antarctic silverfish (Pleuragramma antarcticum) in the Ross Sea

   community of top predators in the shelf waters of the Ross Sea. In spite of their abundance and important ... role in Antarctic food chains, very little is known of many ecological and biological aspects of this ... species. A combined trawl and acoustic survey of silverfish was carried out on the western Ross Sea shelf ... during the New Zealand International Polar Year Census of Antarctic Marine Life research voyage on R.V ...

   Meeting Document : WG-FSA-10/P04 : Автор(ы): R.L. O’Driscoll, G.J. Macaulay, S. Gauthier, M. Pinkerton and S. Hanchet

3. The annual random stratified trawl survey to estimate the abundance of Dissostichus eleginoides and Champsocephalus gunnari in the Heard Island region (Division 58.5.2) for 2012

   Abstract:  The annual random stratified trawl survey at HIMI was completed in March to May of 2012 ... Ridge, Plateau Southeast and Plateau West, and in a repeat of the hauls in Ground B. Catches in this ... high as the long term average (2006-2011). The catches of Dissostichus eleginoides for 2012 were twice ... those of 2011 and about one and a half times higher than the long-term average. Champsocephalus gunnari ...

   Meeting Document : WG-FSA-12/25 : Автор(ы): G.B. Nowara and T. Lamb (Australia)

4. A characterisation of the toothfish fishery in Subareas 88.1 and 88.2 from 1997/98 to 2011/12

   Subarea 88.1 and for 10 years in Subarea 88.2. This report summarises the timing, depth, and location of ... fishing together with the catch of Dissostichus spp. and bycatch species by year for the period 1997–98 to ... 2011–12. During the 2011–12 fishing year most of the catch in Subarea 88.1 came from the slope SSRU ... 88.1K. About 70% of the catch in the north was taken from 88.1C, and about 85% of the catch on the shelf ...

   Meeting Document : WG-FSA-12/42 : Автор(ы): M.L. Stevenson ,S.M. Hanchet, S. Mormede and A. Dunn (New Zealand)

5. Revised research plan for the 2013/14 exploratory longline fishery of Dissostichus spp. in Division 58.4.1

   -SAM meeting. We tentatively recalculated a sample size of Dissostichus spp in each block in such a way ... that the numbers of tag recoveries in the 2016 season shows an approximately 0.3 of coefficient ... variance of biomass estimate from the bootstrapped procedure, under the condition that the exploitation ... blocks, in order to promote successful stock assessment. We tentatively examined the degree of coverage ...

   Meeting Document : WG-FSA-13/38 : Автор(ы): Delegation of Japan

6. Descriptive analysis of the toothfish (Dissostichus spp.) tagging programme in Subareas 88.1 & 88.2 for the years 2000–01 to 2012–13

   Abstract:  We provide an update of the descriptive analyses of the toothfish tagging programme in ... Subareas 88.1 and 88.2, including summaries of data for the 2013 season. Overall, a total of 37 047 ... tagging rate of one toothfish per tonne of catch in the Ross Sea region. Tag recapture data showed that ... most fish are recorded as being recaptured only a short distance from their point of release, typically ...

   Meeting Document : WG-FSA-13/49 : Автор(ы): S. Parker, A. Dunn, S. Mormede and S. Hanchet (New Zealand)

7. Selectivity and two biomass measures in an age-based assessment of Antarctic krill (Euphausia superba)

   Abstract:  An integrated, age-structured model was fitted to different combinations of survey data ... using two forms of selectivity (logistic or double-logistic) with time-constant or annually varying ... selectivity to investigate the population dynamics of Antarctic krill (Euphausia superba) near the Antarctic ... the South Shetland Islands from 1992 to 2011. Two indices of krill biomass based on (1) trawl-net ...

   Meeting Document : WG-EMM-15/P07 : Автор(ы): D. Kinzey, G.M. Watters and C.S. Reiss

8. An ecosystem-based management procedure for krill fisheries: a method for determining spatially-structured catch limits to manage risk of significant localised fisheries impacts on predators

   single-species assessment of yield, and a method for implementing the procedure.  The decision rule for ... setting catch limits for a given harvest strategy has a straight forward expression of the target ... of predator-prey dynamics beyond that evident in the data.  It is a natural extension of the current ... precautionary approach of CCAMLR for krill and can utilise existing datasets, including B0 surveys, local scale ...

   Meeting Document : WG-EMM-15/36 : Автор(ы): A. Constable and S. Candy (Australia)

9. Performance metrics to index the spatial coverage of mark-recapture data

   Abstract:  Understanding the spatial distribution of the release of tagged fish and the subsequent ... spatial coverage of fishing effort to recapture tagged fish is an important consideration when ... measures of spatial overlap and potential bias in the development of tag-based biomass estimates are an ... statistics: (i) a single measure of the degree of spatial overlap between the release of tagged fish and ...

   Meeting Document : WG-SAM-16/13 : Автор(ы): C. Marsh, A. Dunn and S. Mormede

10. Classification of Southern Ocean krill and icefish echoes using Random Forests

    Abstract:  Target identification remains a challenge for acoustic surveys of marine fauna ... . Antarctic krill, Euphausia superba, are typically identified through a combination of expert scrutiny of ... echograms and analysis of differences in mean volume backscattering strengths (S V; dB re 1 m-1) measured at ... icefish are currently surveyed using bottom-trawls, but the resultant estimates of abundance may be biased ...

    Meeting Document : WG-EMM-16/23 : Автор(ы): N. Fallon, S. Fielding and P. Fernandes

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