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1. Using outputs from spatial population models of Antarctic toothfish in the Ross Sea region to investigate potential biases in the single population model

   Abstract:  We present a method to evaluate potential biases and uncertainty in the tagging assumptions of the stock assessment for Antarctic toothfish in the Ross Sea region using spatially explicit operating models. The method allows investigation of potential biases and uncertainty in the

   Meeting Document : WG-FSA-12/45 : Author(s): S. Mormede and A. Dunn (New Zealand)

2. Spatial Population Model User Manual, SPM v1.1-2012-09-06 (rev. 4806)

   Abstract:  SPM (Spatial Population Model) is a generalised spatially explicit age-structured population dynamics and movement model. SPM can model population dynamics and movement parameters for an age-structured population using a range of observations, including tagging, relative abundance, and

   Meeting Document : WG-FSA-12/46 : Author(s): A. Dunn, S. Rasmussen and S. Mormede (New Zealand)

3. Quantifying vessel performance in the CCAMLR tagging program: spatially and temporally controlled measures of relative mortality and tag-detection rates

   Abstract:  A reliable commercial tagging program is critical to the successful management by CCAMLR of a number of toothfish fisheries in Antarctica, but the evaluation of tagging performance has been thus far inconclusive because the confounding effect of factors such as time and location of

   Meeting Document : WG-FSA-12/47 Rev. 1 : Author(s): S. Mormede and A. Dunn (New Zealand)

4. Models of larvae dispersion of Antarctic toothfish (Dissostichus mawsoni)

   Abstract:  Antarctic toothfish (Dissostichus mawsoni) have a circumpolar distribution, and have been found associated with bathymetric features shallower than 2250 m and typically deeper than 500 m from the Antarctic continent north to approximately 57° S. Efforts to understand early life history

   Meeting Document : WG-FSA-12/48 : Author(s): A. Dunn, G.J. Rickard, S.M. Hanchet and S.J. Parker (New Zealand)

5. Summary of toothfish tagging suitability data from paired Spanish line – trotline sets

   Abstract:  Conservation Measure 41-01\Annex C requires participants in exploratory fisheries to only tag fish with a high probability of survival. Further it recommends that fish hooked only in the mouth should be tagged. A new data collection form was implemented in 2012 to allow evaluation of

   Meeting Document : WG-FSA-12/49 : Author(s): S. Parker and D. Fu (New Zealand)

6. Characterisation of Muraenolepis species by-catch in the CCAMLR Convention Area

   Abstract:  Muraenolepis species are caught in low numbers with bottom longline and trawl gears throughout the CCAMLR Convention Area. There are seven known species in the genus, but more work on the taxonomy of the group is needed and the number of species is uncertain. The few biological studies

   Meeting Document : WG-FSA-12/50 : Author(s): S. Parker, P. McMillan and P. Marriott (New Zealand)

7. Demersal fish communities in the Ross Sea region of Antarctica: comparisons between video and trawl survey methods

   Abstract:  Reliable estimates of demersal fish community composition and population densities are essential for understanding the ecological effects of fisheries. Such estimates are conventionally derived from research trawl surveys but video techniques afford an alternative, or complementary,

   Meeting Document : WG-FSA-12/51 : Author(s): D.A. Bowden, S.M. Hanchet and P.M. Marriott (New Zealand)

8. Diet of Antarctic toothfish (Dissostichus mawsoni) from the Ross Sea region, Antarctica

   Abstract:  The diet of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea region was examined based on stomach samples obtained from observers on New Zealand fishing vessels in 2003 and 2010. Overall, the diet of sub-adult toothfish was similar to that of adult toothfish, with a dominance

   Meeting Document : WG-FSA-12/52 : Author(s): D.W. Stevens, M.R. Dunn, M.H. Pinkerton and J.S. Forman (New Zealand)

9. Testing for genetic differentiation between two size classes of the starry skate (Amblyraja georgiana)

   Abstract:  Two size classes of A. georgiana have been described in by-catch fishing data reported in the catch data from the Ross Sea fisheries. We extracted DNA from A. georgiana samples from both size classes collected by Scientific Observers in the Ross Sea. We determined the DNA sequences of

   Meeting Document : WG-FSA-12/53 : Author(s): P. Ritchie and A. Fleming (New Zealand)

10. Distribution, morphology, growth, reproduction, diet and trophic position of two species of grenadier (Macrourus whitsoni and M. caml) in the Ross Sea region of the Southern Ocean (CCAMLR Subareas 88.1 and 88.2)

    Abstract:  We present the first differentiated information on the biology and ecological niche of Macrourus whitsoni and M. caml in the Ross Sea region of the Southern Ocean. Fish were caught by New Zealand vessels in the fishery for Antarctic toothfish (Dissostichus mawsoni) between December 2011

    Meeting Document : WG-FSA-12/54 Rev. 1 : Author(s): M.H. Pinkerton, P. McMillan, J. Forman, P. Marriott, P. Horn, S. Bury and J. Brown (New Zealand)

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