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1. PROPOSAL FOR AN EXTENSION TO THE MARK–RECAPTURE EXPERIMENT TO ESTIMATE TOOTHFISH POPULATION SIZE IN THE SOUTH OF SUBAREA 48.4

   Abstract:  1. A three-year tagging study in the South of Subarea 48.4 was initiated in the 2008/09 fishing season with the aims of providing the data required for assessments of the population structure, size, movement and growth of both Dissostichus eleginoides and Dissostichus mawsoni in the

   Meeting Document : WG-FSA-09/18 : Author(s): J. Roberts and D.J. Agnew (United Kingdom)

2. STANDING STOCK, SPATIAL DISTRIBUTION, AND BIOLOGICAL FEATURES OF DEMERSAL FINFISH FROM THE 2009 U.S. AMLR BOTTOM TRAWL SURVEY OF THE SOUTH ORKNEY ISLANDS (SUBAREA 48.2)

   Abstract:  A random depth stratified bottom trawl survey of South Orkney Islands (CCAMLR Subarea 48.2) demersal finfish was completed during February-March, 2009 during the U.S. AMLR Program field season. Detailed information is presented for several of the most abundant demersal finfish species,

   Meeting Document : WG-FSA-09/19 : Author(s): C.D. Jones (USA) and K.-H. Kock (Germany)

3. UPDATE OF THE INTEGRATED STOCK ASSESSMENT FOR THE PATAGONIAN TOOTHFISH (DISSOSTICHUS ELEGINOIDES) FOR THE HEARD AND MCDONALD ISLANDS (DIVISION 58.5.2)

   Abstract:  The integrated assessment of Patagonian toothfish, Dissostichus eleginoides, for the Heard and McDonald Islands (Division 58.5.2) was updated by replacing catch-at-length proportions from commercial catches with catch-at-age proportions by applying age length keys (ALKs) to gear- type

   Meeting Document : WG-FSA-09/20 : Author(s): S.G. Candy and D.C. Welsford (Australia)

4. OTOLITH-BASED AGEING OF THE PATAGONIAN TOOTHFISH (DISSOSTICHUS ELEGINOIDES) FOR THE HEARD AND MCDONALD ISLANDS: MODELLING FIXED AND RANDOM READER ERROR USING MULTIPLE READINGS OF A REFERENCE COLLECTION

   Abstract:  Integrated assessments that use catch-at-age or abundance-at-age data for model calibration require an ageing error matrix as input in order to adequately account for uncertainty in the data resulting from the imprecision of age determination using annual ring counts from otoliths. This

   Meeting Document : WG-FSA-09/21 : Author(s): S.G. Candy, G.B. Nowara, D.C. Welsford and J.P. McKinlay (Australia)

5. COMPARISON OF THE PRECISION OF DIRECT VERSUS AGE LENGTH KEY METHODS OF ESTIMATING CATCH-AT-AGE PROPORTIONS

   Abstract:  Catch-at-age proportions can be estimated directly using a simple random sample (SRS) of fish in the catch, determining the ages in the sample, and calculating proportions in each age class. This “direct” method can be replaced by the age length key (ALK) method if there are in addition

   Meeting Document : WG-FSA-09/22 Rev. 1 : Author(s): S.G. Candy (Australia)

6. ACCURACY OF BENTHIC INVERTEBRATE BY-­CATCH IDENTIFICATION BY OBSERVERS OPERATING IN THE HEARD ISLAND AND MCDONALD ISLANDS PATAGONIAN TOOTHFISH LONGLINE FISHERY

   Abstract:  As a means of testing the accuracy of observer identifications and to provide additional data on benthic invertebrate by-catch; observers operating aboard the longline fishing vessel Antarctic Chieftain were asked to identify and retain all benthic invertebrate by-catch from a recent

   Meeting Document : WG-FSA-09/23 : Author(s): T. Hibberd (Australia)

7. COMPARATIVE CHARACTERISTICS OF PATAGONIAN (DISSOSTICHUS ELEGINOIDES) AND ANTARCTIC (D. MAWSONI NORMAN) TOOTHFISH INHABITING DIFFERENT SECTORS OF THE SOUTHERN OCEAN

   Abstract:  On the basis of our own data and literature materials, the schematic posters showing spatial and vertical distribution of two toothfish species during their whole life cycle, changes in food interrelations and size composition on the shelf and continental slope, are presented. The

   Meeting Document : WG-FSA-09/24 : Author(s): K.V. Shust, I.P. Zarikhin, I.G. Istomin, A.F. Petrov, V.A. Tatarnikov and N.S. Demina (Russia)

8. RESULTS OF INVESTIGATIONS ON ANTARCTIC TOOTHFISH D. MAWSONI NORMAN, 1937 (PERCIFORMES,NOTOTHENIIDAE) FEEDING IN SUBAREA 48.6 SSRU E DURING THE 2008/09 SEASON

   Abstract:  For the first time, the investigations on feeding of Antarctic toothfish (Dissostichus mawsoni) from the bottom longline catches in the Lazarev Sea were carried out. The analysis of food composition for males and females in the eastern Lazarev Sea showed that dominant food objects for

   Meeting Document : WG-FSA-09/25 : Author(s): A.F. Petrov and V.A. Tatarnikov (Russia)

9. THE HISTOLOGICAL ANALYSIS OF OOGENESIS AND MATURITY OF ANTARCTIC TOOTHFISH FROM THE ROSS SEA

   Abstract:  The results of the histological analysis of the Antarctic toothfish (Dissostichus mawsoni) reproductive system, caught in December- February 2005/2006 in the Ross Sea are presented. The morphological parameters, indices of gonads and condition by Fulton have been described. The

   Meeting Document : WG-FSA-09/26 : Author(s): S.V. Piyanova and A.F. Petrov (Russia)

10. PRELIMINARY ASSESSMENT OF TOOTHFISH IN SUBAREA 48.3

    Abstract:  1. 2009 data have been incorporated in to the catch-at-age based CASAL model for toothfish in Subarea 48.3. 2. Fits to the survey data are good for the early 2000s, particularly 2004 to 2006. Fits to the catch at age data are good, except for 2009 where large numbers of age 7 and age 9

    Meeting Document : WG-FSA-09/28 Rev. 1 : Author(s): D.J. Agnew and T. Peatman (United Kingdom)

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