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1. Progress report on collaborative research for otolith chemistry of Antarctic toothfish Dissostichus mawsoni in the Southern Ocean

   Abstract:  Otolith chemical analysis is one of important and useful approaches to reveal the stock ... structure and connectivity of Dissostichus mawsoni in the Southern Ocean. Recalling the suggestion from WG ... -FSA 2018 about the international collaboration on otolith microchemistry of D. mawsoi, this progress ... report summarized the update of this work. The result indicated that the heterogeneity in stock structure ...

   Meeting Document : WG-FSA-2019/61 : Autor(es): G.P. Zhu

2. Global relationships amongst black-browed albatrosses: analysis of population structure using mtDNA and microsatellites

   Abstract:  The population structure of black-browed (Thalassarche melanophris and T. impavida) and ... five island groups in the Southern Ocean. High levels of sequence divergence were found in both taxa ... (T. impavida). T. melanophris from Campbell Island contain birds from each of the three groups ... , indicating high levels of mixture and hybridization. In contrast, grey-headed albatrosses form one globally ...

   Meeting Document : WG-FSA-01/19 : Autor(es): T.M. Burg and J.P. Croxall (United Kingdom)

3. Differences in distribution and population structure of krill (Euphausia superba) between penguin and fur seal foraging areas near Seal Island

   areas of krill (≥250g/m2) were rather limited. In contrast, fur sea! foraging areas were formed in ... . 2-3 km in horizontal distance) of higher densities (≥250g/m2). In the inshore foraging areas krill ... vertical migration, staying close to the surface throughout the day. As for body size and maturity of krill ... , in the inshore foraging areas middle-sized krill (modal length 43 mm), which consisted mainly of ...

   Meeting Document : WG-KRILL-92/27 : Autor(es): T. Ichii, H. Ishii (Japan), J.L. Bengtson, P. Boveng, J.K. Jansen (USA) and M. Naganobu (Japan)

4. Intra-archipelago moult dispersion of southern elephant seals at the Prince Edward Islands, southern Indian Ocean

   ), 38 of which could be individually identified by resighting their tag numbers. The majority of the MI ... . The attendance rate of the known individuals at their natal island during the annual moult was only 40 ... PEI, and 80 ± 4% for the simulation. Seasonal and annual absences of seals from MI violate the ... ‘homogeneity of capture’ assumption of mark–recapture models. When multiple sightings during any year are ...

   Meeting Document : WG-EMM-10/P16 : Autor(es): W.C. Oosthuizen, M.N. Bester, P.J.N. de Bruyn and G.J.G. Hofmeyr

5. Lessons from CCAMLR on the implementation of the ecosystem approach to managing fisheries

   Abstract:  The Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) is ... can be developed to decide on spatial management strategies for fisheries so that predators of target ... species are not disproportionately affected as a result of spatial and/or temporal dependencies of ... assessing the status of target species and their predators, but also in designing cost-effective management ...

   Meeting Document : WG-EMM-12/P06 : Autor(es): A.J. Constable

6. A characterisation of the toothfish fishery in Subareas 88.1 and 88.2 from 1997–98 to 2013–14

   Abstract:  This report summarises the timing, depth, and location of fishing together with the ... biological aspects and catch of Antarctic toothfish up to an including the 2014 season. In 2014, the Ross Sea ... 12 years with a slight decline in the past two years. Length frequency distributions of Antarctic ... strong mode of smaller (90–120 cm TL) toothfish present in the Slope fishery from 2010–2013 was not ...

   Meeting Document : WG-FSA-14/52 : Autor(es): M. Stevenson, S. Hanchet, S. Mormede and A. Dunn (New Zealand)

7. Progress on the application of an age-structured production model fitted to commercial catch-rate and catch-at-length data to assess the toothfish (Dissostichus eleginoides) resource in the Prince Edward Island vicinity

   allow the estimation of a selectivity-at-age function that decreases at larger ages. This is, in ... particular, to accommodate the view of the August 2003 meeting of the Subgroup on assessment methods that 0.2 ... yr-1 is likely the largest value of natural mortality M that is plausible for toothfish. Catch, catch ... . In the meantime, based upon a cautious interpretation of projections over the wide range of current ...

   Meeting Document : WG-FSA-03/97 : Autor(es): A. Brandão and D.S. Butterworth (South Africa)

8. The three-frequency method for classifying the species and assessing the size of two euphausiids (Euphausia superba and Euphausia crystallorophias)

   rule methodologies. This paper explores applications of the multi-frequency method using data from ... , the sampled areas, the instrumental and the sampling strategies varied. First, on the basis of the ... echo-integrations, made simultaneously either at two or at three frequency, and of the results of net ... acoustic estimates of euphausiid lengths, derived from the fluid sphere model, are compared with lengths ...

   Meeting Document : WG-EMM-02/37 : Autor(es): M. Azzali, G. Lanciani and I. Leonori (Italy)

9. Fecundity and size at sexual maturity of the bigeye grenadier (Macrourus holotrachys) at South Georgia (CCAMLR Subarea 48.3)

   at different stages of development suggesting that M. holtrachys may have an extended spawning season ... . Analyses of size at sexual maturity indicate that Lmat 50 occurs at 29cm (pre-anal length) whilst Lint 50 ... final ovarian development is a prolonged process in M. holotrachys which probably lasts for a period of ... greater than a year. Sex ratios of specimens caught in the longline fishery are highly skewed with females ...

   Meeting Document : WG-FSA-02/26 : Autor(es): T. Mulvey, S.A. Morley, M. Belchier and J. Dickson (United Kingdom)

10. Identification of Amblyraja species in the longline fishery in Subarea 48.3 – CCAMLR

    A.georgiana. Male A. sp.anon attain 50% maturity at a total length of 97cm, 13 cm greater than the length at ... 50% maturity for A.georgiana. Comparisons of colour and patternation were found to be consistent ... proportionally longer claspers to total length (2.77% difference between averages) than male A.sp.anon. 94% of ... captures of A.sp.anon were found at depths >1000m, where 85% of A.georgiana were caught in depths ...

    Meeting Document : WG-FSA-02/54 : Autor(es): M. Endicott (United Kingdom), L.J.V. Compagno (South Africa) and D.J. Agnew (United Kingdom)

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