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1. Assessment models for Antarctic toothfish (Dissostichus mawsoni) in Subarea 88.2 SSRUs 88.2C–G for the years 2002–03 to 2010–11

   Abstract:  This paper describes the first Bayesian sex and age structured population stock ... , and G (SSRUs 88.2C–G). For modelling purpose, we split the region into two fisheries: south of 70.2° S ... fish are caught and most of the effort has been concentrated. For our reference case we used a selected ... trips data set and fitted to tag and fishery data from the northern fishery only. Model fits to the data ...

   Meeting Document : WG-FSA-11/43 : Author(s): S. Mormede, A. Dunn and S.M. Hanchet (New Zealand)

2. DEFINING TAG RATES AND TACS TO OBTAIN SUITABLY PRECISE ABUNDANCE ESTIMATES FOR NEW AND EXPLORATORY FISHERIES IN THE CCAMLR CONVENTION AREA

   . With respect to the tagging-based abundance estimator, we use the Lincoln-Petersen method and derive a ... formula that gives the expected coefficient of variation of the abundance estimate in terms of the number ... of releases and recaptures, which can in turn be expressed in terms of the tagging rate per tonne ... caught, the catch taken and the postulated underlying exploitable biomass. This relationship is shown to ...

   Meeting Document : WG-SAM-08/06 : Author(s): R.M. Hillary (UK)

3. Monitoring Antarctic toothfish (D. mawsoni) recruitment in the southern Ross Sea

   survey monitoring the recruitment of Antarctic toothfish (Dissotichus mawsoni) in the southern Ross Sea ... was started in 2012. The first year established the feasibility of carrying out a random stratified ... longline survey from a fishing vessel platform, the FV San Aotea II, to monitor recruiting toothfish using ... standardised gear in a standardised manner. It also established the appropriate depths and stratum boundaries ...

   Meeting Document : WG-FSA-17/57 : Author(s): S.M. Hanchet, S. Mormede, S. Parker, K. Large, A. Dunn and B. Sharp

4. Methodological aspects of the International Synoptic Krill Survey in Area 48, 2019

   Abstract:  The effect of differences in the methodology used for the CCAMLR 2000 krill acoustic ... survey and the 2019 synoptic survey were considered. These were 1) the effect of acoustic surveying at ... night, 2) differing trawl selectivity between the vessels that participated in the survey, and 3) the ... effect of krill discrimination method. Surveying during the day only produced a 6% increase in the ...

   Meeting Document : SG-ASAM-2019/10 : Author(s): G. Macaulay, G. Skaret, T. Knutsen and B. Krafft

5. Information on illegal fishing in Statistical Area 58 Assessment of illegal fishing in French waters around Kerguelen and Crozet Islands Report of observations and inspections in the CCAMLR Area 2011/2012 season (1 July 2011 – 15 July 2012)

   Abstract:  This document summarises French observations of illegal fishing for the past year ... .   The geographical area covered in this report comprises Statistical Subarea 58.6 and Divisions 58.5.1 ... and 58.5.2 (which include the Crozet, Kerguelen and Heard and McDonald EEZs), Statistical Divisions ... 58.4.3, 58.4.4, (BANZARE, Elan, Lena and Ob Banks) and Subarea 58.4.1. Vessels on the CCAMLR black list ...

   Meeting Document : CCAMLR-XXXI/35 : Author(s): Délégation française

6. Managing ecosystem uncertainty: critical habitat and dietary overlap of top-predators in the Ross Sea

   managers of the close spatial and temporal ecological overlaps among top predators in the Ross Sea Shelf ... ) demonstrated that space-time overlap is critical to predicting the degree to which a fishery might affect a ... food web. The fisheries that we contemplate are those for Antarctic toothfish and the Antarctic minke ... whale, though other species might also soon be exploited in the Ross Sea region. In addition to those ...

   Meeting Document : WG-EMM-06/29 : Author(s): Testa, J.W., Stewart, B.S., Olmastroni, S., Lyver, P., Karl, B., Eastman, J., Barton, K., Ballard, G., Toniolo, V., Wilson, P., Ainley, D.

7. Estimating fishing gear selectivity for trawlers using length-frequency data from concurrent commercial trawl and longline fishing for Patagonian toothfish in Division 58.5.2 and the ratio of their hazard functions

   Abstract:  The upper-arm of the length-dependent fishing selectivity function for trawlers fishing ... for Patagonian toothfish around Heard Island (Division 58.5.2) was modelled as the exponential of a ... assuming that, for the upper range of lengths, fish are fully selected by longliners but not by trawlers ... . To estimate the trawl gear selectivity while simultaneously adjusting for relative availability of ...

   Meeting Document : WG-FSA-06/35 : Author(s): S.G. Candy (Australia)

8. A characterisation of the toothfish fishery in Subareas 88.1 and 88.2 from 1997/98 to 2009/10

   Abstract:  The exploratory fishery for Dissostichus spp. Has now been operating for 14 years in ... Subarea 88.1 and for 9 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 ... 2009–10. During the 2009–10 fishing year most of the catch in Subarea 88.1 came from the slope SSRUs ...

   Meeting Document : WG-FSA-10/23 : Author(s): S.M. Hanchet, M.L. Stevenson and A. Dunn (New Zealand)

9. Assessment models for Antarctic toothfish (Dissostichus mawsoni) in Subarea 88.2 SSRUs 88.2C–H for the years 2002–03 to 2012–13

   Abstract:  This paper presents the Bayesian sex and age structured population stock assessment of ... 88.2C–H). We examined several models including the 2013 implementation of the 2011 base case (R1), using ... the revised data selection method (R2), using a logistic selectivity for the northern fishery (R3 ... ), down-weighting the age data (R4), and having annual age length keys in the north (R5). The stock ...

   Meeting Document : WG-FSA-13/52 : Author(s): S. Mormede, A. Dunn and S.M. Hanchet (New Zealand)

10. Research plan for the exploratory longline fishery for Dissostichus spp. in Divisions 58.4.1 and 58.4.2 in 2015/16

    Abstract:  Most things related to Dissostichus spp. in the eastern side of Antarctic has not been ... known well as namely the area is data poor areas. In the Division 58.4.1 there are two stocks; one ... extends from the SSRU 58.4.1C to the SSRU 58.4.2A, and the other one to the SSRU 58.4.1H. The population ... sizes were vulnerable with a big range of about 1,000-2,000 t per SSRU in 58.4.1. During the 2004-2014 ...

    Meeting Document : WG-SAM-15/07 : Author(s): Delegation of the Republic of Korea

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