Search results

1. Potential modelling structures for a two-area stock assessment model for Antarctic toothfish (Dissostichus mawsoni) in the Amundsen Sea Region

   Abstract:  Two-area population models for Antarctic toothfish in the Amundsen Sea Region were ... developed further as current single area models did not fully explain the patterns in the observed data on ... , these models were limited to data collected in SSRU 88.2H as there were few data available to inform ... estimation of biomass in SSRUs 88.2C–G. Additional data resulting from a two-year research plan implemented ...

   Meeting Document : WG-SAM-15/49 : Author(s): S. Mormede, S.J. Parker, A. Dunn and S.M. Hanchet (New Zealand)

2. Selectivity-induced bias in growth parameter estimates

   Abstract:  A short simulation study has been carried out to investigate the size of the bias in ... being included in catch samples. Fish were included in catch samples from the population with ... selectivity function used in the simulations closely matched those used for current toothfish assessments in ... producing considerably lower estimates of L? and higher estimates of K than in the true population. The ...

   Meeting Document : WG-FSA-SAM-05/19 : Author(s): G.P. Kirkwood (United Kingdom)

3. DEVELOPING MODELS OF ANTARCTIC MARINE ECOSYSTEMS IN SUPPORT OF CCAMLR AND IWC

   is currently in draft form open to comment and is being developed to provide an introduction to the ... to the use of ecosystem models in CCAMLR and the IWC and a history of the developmental work in those ... that need to be considered in parameterising a model, providing input data for those models and for ... addressing uncertainties in this process. Lastly, it summarises the modelling platforms being developed in ...

   Meeting Document : WG-EMM-08/14 : Author(s): A. Constable (Australia)

4. Annual report of research fishing operations at Division 58.4.3a in the 2017/18 fishing season

   toothfish (Dissostichus eleginoides) in Division 58.4.3a in the 2017/18 fishing season by France and Japan ... . One fishing cruise by French vessel (“ Mascareignes III ”) took place in May 2018 and caught 2.5 ... tonnes of D. eleginoides in 58.4.3a. The data set, C2 and Observer data, were provided by the CCAMLR ... Secretariat on the 21th August 2018. In this paper, the data set during current fishing season (2017/18) was ...

   Meeting Document : WG-FSA-18/50 : Author(s): Delegations of France and Japan

5. Fish by-catch in the krill fishery: 2018 update

   Abstract:  Data on fish bycatch in the krill fishery from commercial catch data (120 949 hauls ... increase in the data quality from the observer scheme and an increase in the frequency of fish bycatch in ... the commercial krill fishery catch data. As in previous years there was a high degree of overlap in ... the most frequently reported taxa in the C1 data and SISO data, with Lepidonothen larseni the most ...

   Meeting Document : WG-FSA-18/10 : Author(s): CCAMLR Secretariat

6. Energetics of diving in macaroni penguins

   Abstract:  Heart rate (fH), abdominal temperature (Tab) and diving depth were measured in thirteen ... adjustments that might facilitate the diving behaviour observed in this species. In common with other diving ... birds, macaroni penguins showed significant changes in fH associated with diving, and these variables ... accounted for 36% of the variation in dive duration. When VO2 was calculated for dives of different ...

   Meeting Document : WG-EMM-03/39 : Author(s): J.A. Green, P.J. Butler, A.J. Woakes and I.L. Boyd (United Kingdom)

7. Modelling Southern Ocean krill population dynamics: biological processes generating fluctuations in the South Georgia ecosystem

   important aspect of the variation is fluctuation in the abundance of krill, the major prey item of many of ... the higher predators. Direct impacts of variability in the large-scale physical environment, such as ... changes in ocean circulation, have been suggested as the main factor generating the observed fluctuations ... dynamics in the observed variation. Here, analyses of a model of krill population development and predator ...

   Meeting Document : WG-EMM-01/53 : Author(s): E. Murphy and K. Reid (United Kingdom)

8. A comparison of densities and length distribution of the Champsocephalus gunnari stock in Subarea 48.3 between years 1994 and 1995

   Abstract:  Mean densities and length structure of Champsocephalus gunnari obttained in the 1994 ... and 1995 surveys conducted in subarea 48.3 by BIP Dr: E L HOLMBERG are compared. Haul locations were ... ; 151–250 and 251–500 m depth strata. The cluster structure is considered as a nested factor in an ANOVA ... design. Forty five stations in the first cruise and 48 in the second were analyzed. Of these, 51 pairs of ...

   Meeting Document : WG-FSA-95/34 : Author(s): Marschoff, E., Calcagno, J., Gonzalez, B.

9. Results of a CCAMLR-sponsored research survey to monitor abundance of pre-recruit Antarctic toothfish in the southern Ross Sea, February 2012

   longline surveys to monitor pre-recruit (<100 cm TL) toothfish in the south of SSRUs 881.J and 881.L in ... the southern Ross Sea using standardised gear in a standardised manner; and (ii) To carry out ... experimental depth-stratified fishing in 400–600 m depth adjacent to the survey boundaries to establish the ... carry out a longline survey of pre-recruit toothfish from a commercial fishing vessel in Ross Sea using ...

   Meeting Document : WG-FSA-12/41 : Author(s): S.M. Hanchet, S. Mormede, S. Parker, A. Dunn (New Zealand) and H.-S. Jo (Republic of Korea)

10. Assessment models for Patagonian toothfish in research block 58.4.4b_1 (SSRU 58.4.4bC) for the years 1990-2014

    assessments of Dissostichus eleginoides in the research block 58.4.4b_1 following the recommendation of the WG ... observations in 2008 from OB_1a model (OB_1b model), and 3) modified OB_1b model as fix of fishing selectivity ... estimates of OB_1b model (OB_1b_noage model). The fits to CPUE in 2008 and MPD profiles for tags in the same ... year in OB_1a model were spurious. This suggests that Shinsei-maru No. 3 was learning operation in its ...

    Meeting Document : WG-SAM-15/25 : Author(s): K. Taki (Japan), S. Mormede (New Zealand) and T. Ichii (Japan)

Pages