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1. 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

2. Conservation Measure Conservation Measure 41-01 (2013)

   °з.д., на восток до 1°30'в.д., на юг до 60°ю.ш., на запад до 20°з.д., на север до 50°ю.ш. В от 60°ю.ш ... ., на восток до 30°в.д., на юг до побережья, к западу вдоль побережья до 20°в.д., на север до 60°ю.ш. G от 50 ... °ю.ш. В от 60°ю.ш. 86°в.д., на восток до 90°в.д., на юг до побережья, к западу вдоль побережья до 80 ... ., на север до 76°ю.ш. M от 73°ю.ш. у побережья около 169°30' в.д., на восток до 170° в.д., на юг до 80°ю.ш ... General measures for exploratory fisheries for Dissostichus spp. in the Convention Area in the ... Subarea 88.1 Subarea 88.2 Species:  Dissostichus spp. Limitations:  Except for waters adjacent to the ... Kerguelen and Crozet Islands Except for waters adjacent to the Prince Edward Islands Adopted at Meeting ...

   Conservation Measure : 41-01 (2013)

3. A comparison between otoliths and scales for use in estimating the age of Dissostichus eleginoides from South Georgia

   Paper Title:  A comparison between otoliths and scales for use in estimating the age of ... result in large errors in age data for long-lived species, usually due to compression of scale circuli ... otoliths and scales give the same age estimates, and compared the precision of age estimation for both ... Dissostichus eleginoides from South Georgia Abstract / Description:  Age composition is fundamental to ... . Sustainable exploitation rates should have been 20-30% of that based on age determinations from scales, in ... suckers grew quickly at ages 4-7 years, few surviving beyond an age of 9 years. Annual mortality was ... using scales than otoliths. There was evidence that for fish older t l~an 16 years (estimated using ... use of otoliths and scales in estimating tootlifish age 0 10 20 30 40 50 10 20 30 40 50 Reader l ...

   Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 75–92 : Автор(ы): Ashford, J.R., S. Wischniowski, C. Jones, S. Bobko and I. Everson

4. 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)

5. 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)

6. Methods of age determination for mackerel icefish (Champsocephalus gunnari Lönnberg 1905) from the South Georgia Island shelf

   age assessments of fish longer than 30 cm having an enlarged otolith centre. An age/length key for the ... Paper Title:  Methods of age determination for mackerel icefish (Champsocephalus gunnari Lönnberg ... taken in the period July to September. The latter was done using specimens from strictly defined age ... third quarter of the year was also calculated. File:  04-Frolkina.pdf ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 37–49 : Автор(ы): Frolkina, Zh.A.

7. 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)

8. 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)

9. 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)

10. 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)

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