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1. A proposed process for the management of model updates and software versions for stock assessment used within CCAMLR with the example of the CASAL software

   stock assessments in CCAMLR, with the specific example of the CASAL software used for stock assessment ... . The latest published version of any stock assessment software approved by CCAMLR should be used by ... author to demonstrate that the latest development version performs as expected. As an example, the latest ... published version of CASAL should be used by default for stock assessments unless particular features ...

   Meeting Document : WG-SAM-14/32 : Autor(es): S. Mormede and A. Dunn (New Zealand)

2. Integrating CPUE with the GY model: examination of the effects of shortening the CPUE series and incorporating elements of uncertainty into the D. eleginoides assessment of Subarea 48.3

   Abstract:  This year the Subgroup on assessment methods (SAM) requested that WG-FSA consider ... whether a shorter CPUE time-series would be preferable for use in its annual assessments. (WG-FSA-03/40 ... ) shows a more pronounced consequence of reducing the time series, such that the escapement level ... that truncation of the CPUE series could have a much greater effect on the final assessment, depending ...

   Meeting Document : WG-FSA-03/96 : Autor(es): I.R. Ball, S. Candy and A.J. Constable (Australia)

3. Variation in echosounder calibration with temperature and some possible implications for acoustic surveys of krill biomass

   results from multiple Antarctic and European calibration events which suggest that echo-sounder transducer ... calibration parameters were to be employed on survey around South Georgia, and no account were taken of the ... differences in gain settings, then integrated 120 kHz echo signals would be under-reported by 2.8 dB, leading ... in turn to an under-estimation of krill biomass by 52.5 %. Every effort should therefore be made to ...

   Meeting Document : WG-EMM-97/52 : Autor(es): Watkins, J.L., Woodroffe, P., Brierley, A.S., Goss, C.

4. Estimates of krill biomass with commercial significance in small-scale management units applying geostatistics techniques

   differences between commercial biomass can be obtained for areas with the comparable total biomass, e.g. total ... ”, considered for allocating this catch limit among the SSMUs in the Scotia Sea, has to be supplemented with the ... 0.18 and 0.40, and in SGW- 0.06 and 0.24 respectively. The survey 2002 indicated that the significant ... will be related to the problem of acoustic data processing improvement. The methods specially ...

   Meeting Document : WG-EMM-06/36 : Autor(es): S.M. Kasatkina and P.S. Gasyukov (Russia)

5. Is toothfish catch correlated with the catch of vulnerable benthic invertebrate taxa?

   fishing would be higher than if VMEs are distributed randomly with respect to fishing locations. This ... footprint. If high target fish catch rates are associated with habitats where VMEs are found, impacts from ... evidence that the presence of any of six VME taxa was related to Antarctic toothfish catch at the scale of ... scales (10–100 km) would be useful to determine if both toothfish and individual VME taxa have regionally ...

   Meeting Document : WG-EMM-10/27 : Autor(es): S.J. Parker and M.H. Smith (New Zealand)

6. Foraging partitioning between giant petrels Macronectes spp. and its relationship with breeding population changes at Bird Island, South Georgia

   may be reduced by the limited overlap in the activity range, with southern giant petrels foraging ... females in both species. Sex differences agree with previous observations on diet and on attendance at ... seal carcasses, suggesting that females mainly forage at sea, whereas males mainly scavenge on the ... during the breeding season on fur seals, which have increased exponentially in recent years, may be ...

   Meeting Document : WG-FSA-99/39 : Autor(es): J. González-Solís, J.P. Croxall and A.G. Wood (United Kingdom)

7. Spatial distribution of Champsocephalus gunnari size and age are related with depth

   all species resulted significantly associated with depth, positively in the case of C. gunnari and N ... . rossii and negatively for the remaining species. Less association with depth is observed in C. gunnari as ... the fish grow older, indicating that the spatial separation is controlled by depth. The accumulated ... catches of age I- present maximum difference with the older age classes at about 150 meters a result which ...

   Meeting Document : WG-FSA-97/45 : Autor(es): Marschoff, E.R., Serra, J.A., Gonzalez, B., Calcagno, J.

8. Best practice seabird by-catch mitigation for Spanish-rig longline vessels with emphasis on line weighting regimes

   interactions with seabirds. The benchmark sink rate was that of integrated weight (IW) longlines, as used by ... autoline vessels, that are effective in reducing the mortality of white-chinned petrels, one of the world’s ... with weights 30 m apart and either 6 kg or 8 kg traditional weighs, or 40 m and 8 kg weights, most ... rates and are considered to be interchangeable. Best practice seabird bycatch mitigation for line ...

   Meeting Document : WG-FSA-06/22 : Autor(es): G. Robertson (Australia), C.A. Moreno (Chile), B. Wienecke (Australia), P. Gandini (Argentina), G. McPherson (Australia) and J.-P. Seco Pon (Argentina)

9. The reliability of VHF telemetry data for measuring attendance patterns of marine predators: a comparison with Time Depth Recorder data

   the retrieved datasets, 25% of the VHF data could not be interpreted with any reliability ... VHF data collected on 16 lactating Antarctic fur seals to assess onshore attendance, with concurrently ... instrument types, with VHF data overestimating attendance bout duration by approximately 8.9h on average ... , suggesting that VHF data is an inappropriate method for collecting attendance data. Modelling the raw VHF ...

   Meeting Document : WG-EMM-15/P05 : Autor(es): A.D. Lowther, H. Ahonen, G. Hofmeyr, W.C. Oosthuizen, P.J. Nico De Bruyn, C. Lydersen and K. Kovacs

10. Behaviour of Dissostichus eleginoides fitted with archival tags at Heard Island: preliminary results

    alternating with periods of relative inactivity, loosely correlated with moon phase. The direction of vertical ... movement was influenced by the bottom topography, with fish on the relatively shallow plateau or in the ... time. Author(s):  R. Williams and T. Lamb (Australia) Title:  Behaviour of Dissostichus eleginoides ... fitted with archival tags at Heard Island: preliminary results Approval:  Approved ...

    Meeting Document : WG-FSA-02/60 : Autor(es): R. Williams and T. Lamb (Australia)

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