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1. Spatially explicit population dynamics models for Antarctic toothfish in the Ross Sea region

   dynamics of spatial heterogeneity of the population along with age structure, movement and reproductive ... region and used as operating models to evaluate the performance of single-area assessments. The models ... shapes of the preference functions were established through iterative model testing whilst the parameters ... defining the preference functions were estimated within each model. The spatial structure of the models ... ; Pollock et al., 1991; Welsford and Ziegler, 2013). The aims of this paper were two-fold. The first was ... , the spatial structure and movement of fish has shown the potential to have a strong influ- ence on ... , risking overexploitation of those stocks (e.g. Ying et al., 2011). Spatially explicit stock assessments ... modelling of move- ment of fish populations between areas has general- ly been either where migration ...

   Science Journal Paper : CCAMLR Science, Volume 21 (CCAMLR Science, Volume 21) : 19–37 : Autor(es): Mormede, S., A. Dunn, S. Hanchet and S. Parker

2. An integrated stock assessment for the Patagonian toothfish (Dissostichus eleginoides) in Division 58.5.2 using CASAL

   using CASAL and demonstrates that all of the data available for assessments, including surveys, fishery ... is consistent with the problems discussed of the potential bias of a single-area model in trying to ... included in the assessment of D. eleginoides in Division 58.5.2 until the spatial structure of the mark ... -recapture program can be incorporated appropriately in the assessment. The assessment of long-term annual ...

   Meeting Document : WG-FSA-06/64 : Autor(es): A. Constable, S. Candy, T. Lamb and I. Ball (Australia)

3. Near-shore acoustic surveys for Antarctic krill at South Georgia, January 2004

   Islands and off the Barff Peninsula, South Georgia, from a 59 foot yacht in January 2004. The purpose of ... were collected in seastate 6 with winds up to 30 knots and swells of approximately 2.5 m at survey ... speeds of up to 7 knots. Echo intensity data were scaled to krill density using a target strength ... determined from the length distribution of krill sampled from fur seal scats at Bird Island (mean krill ...

   Meeting Document : WG-EMM-04/35 : Autor(es): A.S. Brierley, P.N. Trathan, J. Poncet and A. Morton (United Kingdom)

4. Uncertainty in echosounder calibrations

   Abstract:  Calibration of echo sounders for fish stock assessment are commonly performed using the ... standard sphere method (Johannesson and Mitson, 1983; Simmonds et al., 1984). To determine the accuracy of ... the method, direct measurements of target strength (TS) were made of three standard spheres (Copper ... (Cu)- 23.0 mm and tungsten carbide (WC)- 33.0 mm and 38.1 mm). At the best case range of 5 m, the TS ...

   Meeting Document : WG-EMM-96/40 : Autor(es): Soule, M.A., Demer, D.A.

5. Responding to climate change: Adélie penguins confront astronomical and ocean boundaries

   Abstract:  Long-distance migration enables many organisms to take advantage of lucrative breeding ... latitudes for the remainder of the year. The latitudinal range of the Adélie penguin spans ~22o. Penguins ... from northern colonies may not migrate, but due to the high latitude of Ross Island colonies, these ... that Adélies require both pack ice and some ambient light at all times of year. Over a 3-yr period ...

   Meeting Document : WG-EMM-10/P11 : Autor(es): G. Ballard, V. Toniolo, D.G. Ainley, C.L. Parkinson, K.R. Arrigo and P.N. Trathan

6. Conservation

   2.3.1 Extent to which CCAMLR has taken into account the effects of harvesting, research ... , conservation and associated activities on the marine ecosystem, the known or potential effects of environmental ... changes in its management of Antarctic marine living resources, and the risks and effects of the ... introduction of alien species Recommendation Responsible body Activities to date Status 2.3.1.1 The RP ...

   Page : Site Section: The Organisation

7. Interannual variability in Antarctic krill (Euphausia superba) density at South Georgia, Southern Ocean: 1997 – 2013

   Abstract:  This paper, now in press in ICES Journal of Marine Science, presents krill density ... the paper, we present an additional table (Table 0) which takes the values of krill density from the ... estimates for a 17 year time series of acoustic surveys of the Western Core Box at South Georgia.  Krill ... Approximation (SDWBA) target strength model. Krill density ranged over several orders of magnitude (0 to 10 000 ...

   Meeting Document : WG-EMM-14/P04 : Autor(es): S. Fielding, J. Watkins, P. Trathan et al.

8. Draft proposal for multi-Member research on the Dissostichus mawsoni exploratory fishery in East Antarctica (Divisions 58.4.1 and 58.4.2) from 2018/19 to 2021/22

   research progress including evaluation of standard approaches to identify precautionary catch limits (WG ... for this fishery. Furthermore, examination of bycatch data and underwater video footage have not led ... to the identification of vulnerable marine ecosystem (VME) indicator species (Maschette et al. 2017 ... succeeding plan has been designed as a 4-year plan, based on the low risk profile of this fishery and to ...

   Meeting Document : WG-SAM-18/17 : Autor(es): Delegations of Australia, France, Japan, Republic of Korea and Spain

9. Marine debris, entanglements and hydrocarbon soiling at Bird Island and King Edward Point, South Georgia, Signy Island, South Orkneys and Goudier Island, Antarctic Peninsula 2018/19

   to March 2019. Surveys of beached marine debris at Bird Island recorded a total of 141 items during ... items of beached debris were recorded at Signy Island (operational during summer only; 14 November 2018 ... to 4 March 2019). Fifteen items of beached marine debris were recovered from Goudier Island ... (operational 10 November 2018 to 8 March 2019). Entanglements of three Antarctic fur seals (Arctocephalus ...

   Meeting Document : SC-CAMLR-38/BG/28 : Autor(es): Delegation of the United Kingdom

10. Preliminary analysis on the Kerguelen shelf icefish Champsocephalus gunnari stock from 1996/97 to 2001/02: no evidence in the recovery!

    season when 3889 tonnes of Champsocephalus gunnari were landed (see CCAMLR statistical bulletins) because ... yields were not enough high and the lucrative fishery of Patagonian toothfish Dissostichus eleginoides ... the fishery licences for trawlers have been linked to the obligation of conducting some experimental ... cruises in the traditionnal area of fish aggregations. Such cruises occur regularly with two trawlers from ...

    Meeting Document : WG-FSA-02/65 : Autor(es): G. Duhamel and J. Claudet (France)

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