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1. REVISED AGE AND GROWTH ESTIMATES FOR ANTARCTIC STARRY SKATE, AMBLYRAJA GEORGIANA, FROM THE ROSS SEA

   that these skates initially grow very rapidly for about five years, after which growth almost ceases ... (Francis and Ó Maolagáin, 2005). We present an alternative interpretation of age and growth in A. georgiana ... growth, greater ages at maturity (about 20 years compared with 6–11 years) and greater maximum ages (28 ... . Francis (New Zealand) and M.J. Gallagher (Ireland) Title:  REVISED AGE AND GROWTH ESTIMATES FOR ANTARCTIC ...

   Meeting Document : WG-FSA-08/21 : Автор(ы): M.P. Francis (New Zealand) and M.J. Gallagher (Ireland)

2. Lead-radium dating provides a framework for coordinating age estimation of Patagonian toothfish (Dissostichus eleginoides) between fishing areas

   . 3.3 years was observed across estimated ages younger than 20 years. For the CAF, ages were ... estimates range from approximately 20 to more than 50 years. In this study, lead-radium dating provided ... zones in transverse otolith sections, and longevity estimates exceeding 30 years. Lead-radium dating ... revealed minor biases between the radiometric age and interpretation of growth zone counting for regional ...

   Meeting Document : WG-FSA-11/P01 : Автор(ы): A.H. Andrews, J.R. Ashford, C.M. Brooks, K. Krusic-Golub, G. Duhamel, M. Belchier, C.C. Lundstrom and G.M. Cailliet

3. Direct ageing of Antarctic krill (Euphausia superba) – potential utility of eyestalk sections for age determination

   Abstract:  We outline a method for the direct determination of age in Antarctic krill (Euphausia ... performed. First, longitudinal sections of the eyestalk from known age krill (2+ and 3+ years old) were ... seasons.  Marks consistent with annuli observed in laboratory raised krill were observed. Length at age ... development of age-based assessments of krill necessary for management. Further because the annular bands ...

   Meeting Document : WG-EMM-15/45 : Автор(ы): C. Reiss (USA), R. Kilada (Canada) and S. Kawaguchi (Australia)

4. Age-length key for Champsocephalus gunnari from Subarea 48.3, Dr Eduardo Holmberg survey, February/March 1994

   Abstract:  An age-length key was prepared for Champsocephalus gunnari from the Subarea 48.3, based ... Rocks, a large concentration of fish belonging to age groups 2 (90%) and 3 (10%) was found. The length ... and, the mean lengths of age groups 1-2. Such correspondence was also obtained for age group 3 when ... , E. Marschoff and R. Casaux (Argentina) Title:  Age-length key for Champsocephalus gunnari from ...

   Meeting Document : WG-FSA-94/11 : Автор(ы): E. Barrera-Oro, E. Marschoff and R. Casaux (Argentina)

5. Estimation of natural mortality using catch-at-age and aged mark-recapture data: a simulation study comparing estimation for a model based on the Baranov equations versus a new mortality equation

   the age-structured population for each fishing year by annual recursive use of difference equations ... . An alternative estimation strategy was tested using simulation whereby catch-at-age and aged mark ... -recapture data were generated for 12 years of fishing. Two alternative estimation models were programmed in ... R. Both use the same Poisson likelihood for annual number of recaptures by age class, and both model ...

   Meeting Document : WG-SAM-10/11 Rev. 1 : Автор(ы): S.G. Candy (Australia)

6. Comparison of estimators of effective sample size for catch-at-age and catch-at-length data using simulated data from the Dirichlet-multinomial Distribution

   stocks. An appropriate and accurate estimate of the ESS for catch frequency data for each fishery and ... parameter. This last method generally gave the best estimator of an ESS that is appropriate for haul-level ... fishing year is therefore important for such assessments and this issue is studied using simulation ... one of the year-level methods gave reduced estimates of ESS. An appropriate distributional model that ...

   Meeting Document : WG-SAM-07/7 : Автор(ы): S.G. Candy (Australia)

7. Estimation of natural mortality for the Patagonian toothfish at Heard and McDonald Islands using catch-at-age and aged mark-recapture data from the main trawl ground

   were obtained using proportions-at-length and fishery and year specific age length keys (ALKs) for ... . An alternative strategy was adopted whereby the catch-at-age and mark-recapture data were restricted ... releases and recaptures of tagged fish were available. Catch and releases by age class for this fishery ... programmed in R, based on alternative ordinary differential equations (ODE) for within-year population ...

   Meeting Document : WG-FSA-10/41 : Автор(ы): S. Candy, D. Welsford, T. Lamb, J. Verdouw and J. Hutchins (Australia)

8. Age-structured production model for toothfish at South Georgia

   was fitted for all years, the change to the new selectivity function improved the fit to length ... model. Revisions to the selectivity model this year have led to an ASPM with superior performance ... decaying function of age, with three easily interpretable parameters. When only a single selectivity curve ... selectivity parameters allowed to be estimated on an annual basis the fits are substantially improved. However ...

   Meeting Document : WG-FSA-SAM-05/18 : Автор(ы): A. Payne, G.P. Kirkwood, R. Hillary and D.J. Agnew (United Kingdom)

9. Comparison of age- and length-based harvest control rules for the South Georgia icefish (Champsocephalus gunnari) fishery

   age vector for the population. An age-based harvest control rule was then applied using the operating ... Abstract:  An age-based operating model was constructed and used to derive an initial numbers at ... (United Kingdom) Title:  Comparison of age- and length-based harvest control rules for the South Georgia ... model dynamics and assuming perfect knowledge of the resource (initial numbers at age, maturity and ...

   Meeting Document : WG-SAM-10/12 : Автор(ы): C.T.T. Edwards, R.M. Hillary, R.E. Mitchell and D.J. Agnew (United Kingdom)

10. A von Bertalanffy growth model for Division 58.5.2 fitted to length-at-age data and a comparison of predicted with observed growth from mark–recapture data

    Abstract:  Length-at-age data for the Patagonian toothfish (Dissostichus eleginoides) caught by ... weighted least squares (IWLS) substantially under-predicted mean length-at-age for older ages compared to ... -age for young fish.  Author(s):  S.G. Candy, A.J. Constable, T. Lamb and R. Williams (Australia) Title ... :  A von Bertalanffy growth model for Division 58.5.2 fitted to length-at-age data and a comparison of ...

    Meeting Document : WG-FSA-SAM-06/07 : Автор(ы): S.G. Candy, A.J. Constable, T. Lamb and R. Williams (Australia)

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