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1. Uncertainty in acoustic surveys of Antarctic krill

   acoustic surveys. The variance in system calibration with a standard sphere was evaluated in relation to ... different standard spheres with the results of a calibration by self-reciprocity (Demer and Hewitt ... , submitted). Combining the results of these experiments, the accuracy and precision of a system calibration ... with a standard sphere were estimated as-1.2 dB and ±0.3 dB, respectively. Uncertainty in estimating ...

   Meeting Document : WG-EMM-95/72 : Автор(ы): Demer, D.A.

2. Genetic structuring of Patagonian toothfish populations in the southwest Atlantic Ocean: the effect of the Antarctic Polar Front and deep-water troughs as barriers to genetic exchange

   sites. Mitochondrial DNA (mtDNA) data indicated a sharp genetic division between the Patagonian Shelf ... these data indicate that the APF, as a barrier to larval dispersal, is the major inhibitor of genetic ... effects or (putative) male-biased dispersal. Author(s):  P.W. Shaw, A.I. Arkhipkin and H. Al-Khairulla ...

   Meeting Document : WG-FSA-04/21 : Автор(ы): P.W. Shaw, A.I. Arkhipkin and H. Al-Khairulla (United Kingdom)

3. Penguins, fur seals, and fishing: prey requirements and potential competition in the South Shetland Islands, Antarctica

   their foraging efforts on a single species, Antarctic krill (Euphausia superba). Because these predators ... may have a significant effect on krill abundance, we estimated the energy and prey requirements of ... et al. who asserted that the potential for competition between South Shetland predators and the ...

   Meeting Document : WG-EMM-99/57 : Автор(ы): D.A. Croll and B.R. Tershy (USA)

4. Proposed initiative to contribute to Ross Sea region MPA research and monitoring activities using pop-up satellite tags and otolith chemistry on Dissostichus mawsoni

   is to deploy a total 20 pop-off satellite tags (PSAT) on juvenile toothfish within the General ... survey to monitor abundance of Antarctic toothfish in the southern Ross Sea in 2018/19 (Stevens et al ... ., 2018), and a winter longline survey of Antarctic toothfish in the northern region of Subareas 88.1 and ...

   Meeting Document : WS-SM-18/16 : Автор(ы): C.D. Jones

5. An integrated stock assessment for the Heard Island and the McDonald Islands Patagonian toothfish (Dissostichus eleginoides) fishery in Division 58.5.2

   parameters, the use of abundance estimates from a random stratified trawl survey (RSTS), longline tag-release ... -SAM-2015, and incorporates (a) new fishery observations up to 2015 including new ageing data from the ... catchability q, unfished spawning biomass B 0 and year class strength, and (e) a split of the trawl sub-fishery ... into two periods. All model runs were conducted with the CASAL version 2.30-2012-03-21 that was agreed ...

   Meeting Document : WG-FSA-15/52 : Автор(ы): P. Ziegler and D. Welsford (Australia)

6. An integrated stock assessment for the Heard Island and McDonald Islands Patagonian toothfish (Dissostichus eleginoides) fishery in Division 58.5.2

   , the use of abundance estimates from a random stratified trawl survey (RSTS), longline tag-release data ... , (3) updated maturity parameters, (4) updated tag loss estimates (5) a bias correction for fish ... the CASAL version 2.30-2012-03-21 rev. 4648 that was agreed on by WG-SAM-14. The updated assessment ... model leads to a smaller estimate of the virgin spawning stock biomass B 0 than that obtained in 2015 ...

   Meeting Document : WG-FSA-17/19 : Автор(ы): P. Ziegler

7. Birds: Trophic modelling of the Ross Sea

   Description / Abstract:  A supporting document to the CCAMLR Science paper: M.H. Pinkerton, J.M ... . Bradford-Grieve and S.M. Hanchet.  2010.  A balanced model of the food web of the Ross Sea, Antarctica ... 1993). In a study of chick abundance trends, Barber-Meyer et al. (2008) suggests that the overall ... each year (Ainley et al. 1984), a breeding success of 60%, and juvenile mortality of 1.0 y-1 in the ... (data includes East Crozier) (Taylor et al 1990) compared to 118 000 pairs in 1991, a decrease of 33 ... colonies, and a lack of information on whether these changes are continuing, for the present version of ...

   Document : Site Section: Publications

8. Analysis of variables influencing finfish by-catch in the krill fishery in Area 48

   Abstract:  This report presents the results of a method used to explore potential explanatory ... potential explanatory variables was investigated using a delta-lognormal modelling approach. Time of day ... bycatch of the finfish family groupings. Results indicated that there was a wide disparity in the ... fishery and quantify the impact of this bycatch on the finfish stocks (Peatman et al., 2012). Author(s ...

   Meeting Document : WG-EMM-12/28 : Автор(ы): S.M. Martin, T. Peatman, J. Moir Clark (United Kingdom), O.R. Godø (Norway) and R.C. Wakeford (United Kingdom)

9. Scientific contribution to the 2016 review of Conservation Measure 51-07: Part 2 – outcomes from the application of the risk assessment framework for distributing the krill trigger level in Area 48

   the data within the risk assessment framework, and (ii) a discussion of the implications of this work ... pressure which is a measure of the potential for competition in local areas.  Given the scenarios here ... Watters et al (2013) in which FOOSA was used to explore the consequences of different harvest strategies ... on SSMUs in Area 48.  Author(s):  A. Constable (on behalf of the e-group on CM 51-07 WG-EMM review ...

   Meeting Document : WG-FSA-16/48 Rev. 1 : Автор(ы): A. Constable (on behalf of the e-group on CM 51-07 WG-EMM review)

10. Density and abundance estimates of baleen whales recorded during the 2019 DY098 cruise in the Scotia Sea around South Georgia and the South Sandwich Islands

    estimates, but may provide a useful means of comparing whale densities and habitat use patterns between the ... species during the survey (226 sightings of a total count of 495 whales) and were widely distributed east ... sightings and a cumulative count of 76 whales). Humpback whale abundance in South Georgia (Subarea 48.3) was ... within the Scotia Arc ecosystem, sensu Reilly et al. (2004). Author(s):  M. Baines, M. Reichelt, C. Lacey ...

    Meeting Document : WG-EMM-2019/27 : Автор(ы): M. Baines, M. Reichelt, C. Lacey, S. Pinder, S. Fielding, N. Kelly, E. Murphy, P. Trathan and J.A. Jackson

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