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1. Revision of the commercial catch at age of the Antarctic icefish Champsocephalus gunnari over the period 1976/77 to 1990/91

   proposed that the revised catch at age be used for future assessment of the C. gunnari fishery at South ... Abstract:  A revision of the calculation of total international catch at age of Champsocephalus ... gunnari over the period 1976/77 to 1990/91 is presented. This uses iterative application of two age length ... keys to obtain age distributions, according to a method described by Kimura and Chikuni (1987). It is ...

   Meeting Document : WG-FSA-93/29 : Autor(es): G.B. Parkes (United Kingdom)

2. Verification of the CMIX procedure on species with known age-length keys

   Subarea 26. Age-length keys for 1995-2001 and length frequency data obtained during the surveys carried ... Abstract:  Calculation of age composition of density-at-length data produced during inventory ... the estimates of age composition proportions calculated using the CMIX method from those determined ... from age-length keys (ALK) computed based on the materials of direct age reading may be significant ...

   Meeting Document : WG-FSA-SAM 03/5 : Autor(es): P. Gasiukov (Russia)

3. Update of ongoing work on age and growth of Antarctic toothfish (Dissostichus mawsoni) from Division 58.4.1 by Spain

   Abstract:  We present preliminary results on age and growth of Dissostichus mawsoni for the third ... length-age pair values are: L∞: 208.2, k: 0.074 and t0: 0.564 for females; L∞: 173, k: 0.089 and t0 ... season (2015/16) of the Spanish research fishing in the 58.4.1 Division obtained for growth rings on ... :-0.1771 for males; and L ∞: 226.4, k: 0.05673 and t 0:-0.745 all combined. Values differ with the previous ...

   Meeting Document : WG-FSA-17/66 : Autor(es): L.J. López-Abellán, M.T.G. Santamaría, R. Sarralde and S. Barreiro

4. Information report on the age determination methods of toothfish Dissostichus spp.

   collected in the CCAMLR Convention Area. The equipment used, the procedure for processing and reading age ... Abstract:  The document presents the experience of the age determination of toothfish of the genus ... ways to solve them. Author(s):  I.V. Slypko and P.M. Zabroda Title:  Information report on the age ... Approved Delegation responsibility for releasing documents:  Ukraine ...

   Meeting Document : WG-SAM-18/29 : Autor(es): I.V. Slypko and P.M. Zabroda

5. Manual: estimating the age of Patagonian toothfish (Dissostichus eleginoides) using transverse cross-sections of otoliths

   address recommendations for: the use of otoliths for estimating age; key features to be taken into account ... noted in the growth parameters being used for assessments of toothfish. To assess whether these ... conformity in estimating age of Patagonian toothfish (Dissostichus eleginoides). Arising from the workshop ... , the Center for Quantitative Fisheries Ecology at Old Dominion University has developed a manual to ...

   Meeting Document : WG-FSA-10/15 : Autor(es): K. Underkoffler, N. Ramanna and J. Ashford (USA)

6. Age validation of Patagonian toothfish (Dissostichus eleginoides) from Heard and Macquarie Islands

   recapture, we determined that for age classes 5 to 18, one increment is laid down per year. The expected ... consensus that the observed increments represent annual events, no direct validation has been provided for ... selected for analysis. Strontium (Sr) marks were detected in 139 of the 142 otoliths examined. Using the ... number of increments was the same as the observed increments for 88% of cases (when the time-at-liberty ...

   Meeting Document : WG-FSA-05/60 : Autor(es): K. Krusic-Golub and R. Williams (Australia)

7. 2019 update of ongoing work on age and growth of Antarctic toothfish (Dissostichus mawsoni) from Divisions 58.4.1 and 58.4.2

   Abstract:  Spanish and Australian scientists are working on the age and growth estimates of ... scientists have joined this colaborative work. Age-length frequencies from the three members are shown and ... Australia, Republic of Korea and Spain Title:  2019 update of ongoing work on age and growth of Antarctic ... responsibility for releasing documents:  Spain ...

   Meeting Document : WG-FSA-2019/47 : Autor(es): Delegations of Australia, Republic of Korea and Spain

8. ADDING CATCH AT AGE AND SURVEY DATA TO THE 48.3 TOOTHFISH CASAL ASSESSMENT

   Abstract:  The catch-at-age based CASAL model for toothfish in Subarea 48.3, which was presented ... suggested by WG-FSA-2007 are implemented. Fits to the survey length frequencies are good for recent surveys ... very good. There is evidence for a size-based influence on post-tagging mortality, post-tagging growth ... recaptures at size improve. However, there is still some evidence for a sex-based influence on the fits ...

   Meeting Document : WG-SAM-09/13 : Autor(es): D.J. Agnew and M. Belchier (United Kingdom)

9. Size-age composition and growth of Antarctic toothfish Dissostichus mawsoni in the Weddell Sea

   for the first time since fishery of Dissostichus mawsoni began. It has allowed extending a sampling ... area on biology of this species. In particular, size-age and growth samples of the Antarctic toothfish ... :  Size-age composition and growth of Antarctic toothfish Dissostichus mawsoni in the Weddell Sea Approval ...

   Meeting Document : WG-FSA-13/16 : Autor(es): E.N. Kyznetsova, A.F. Petrov and I.I. Gordeev (Russia)

10. Estimates of natural and fishing mortality from toothfish mark–recapture and catch-at-age data at South Georgia

    fishing mortality, for the given age range, than are assumed and predicted by the current assessment ... Abstract:  This paper presents new results and estimation bias analyses for a Bayesian mark ... for estimating key parameters like natural mortality, as well as a method for comparing parameter ... mortality from toothfish mark–recapture and catch-at-age data at South Georgia Approval:  Approved ...

    Meeting Document : WG-FSA-06/54 : Autor(es): R.M. Hillary and D.J. Agnew (United Kingdom)

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