Résultats de la recherche

1. Estimation of the fishery–krill–predator overlap

   at nine levels of spatio-temporal resolution and using normal, exponential and uniform foraging ... Abstract:  Work undertaken during the intersessional period has enabled better use of the krill ... fishery data, and a comparison between the three existing indices of fishery-krill-predator overlap used ... the level of overlap in recent years (1995-98) than estimated with either the catch in the CPD or the ...

   Meeting Document : WG-EMM-99/11 : Auteur(s): Secretariat

2. A method to evaluate selection of Antarctic krill in towed fishing gears

   ) apply different trawl designs. Very little information exists on the size selectivity of E. superba ... . Size selectivity describes a given trawls designs ability to catch different sizes of a population and ... is valuable information for the management of harvested marine stocks. Size selectivity data is ... traditionally collected during timely and costly fishing experiments in the field where one design is tested at ...

   Meeting Document : WG-EMM-13/34 : Auteur(s): L.A. Krag, B. Herrmann (Denmark), S. Iversen, A. Engås, S. Nordrum and B.A. Krafft (Norway)

3. Using stationary acoustic platforms to assess precision and accuracy of acoustical krill surveys

   issues of krill migrating too close to the surface to be acoustically detected, as well as potential ... issues of diel changes in acoustic scattering strengths. However, due to logistic constraints, acoustic ... effects of krill vertical distribution on survey results. The Institute of Marine Research, Norway has on ... a regular basis deployed stationary platforms in the main area for commercial krill harvesting at ...

   Meeting Document : WG-EMM-2019/32 : Auteur(s): T. Klevjer, G. Skaret and B.A. Krafft

4. A simulation approach to the evaluation of recruitment surveys for D. eleginoides for the Heard Island Plateau region (Division 58.5.2)

   Abstract:  Assessments of long-term sustainable yield using the Generalised Yield Model (GYM) and ... the setting of total allowable catches (TAC) for Patagonian Toothfish, Dissostichus eleginoides, for ... . Evaluation of both the current RSTS design for Division 58.5.2 and some options for future modifications of ... . Census of fish stocks by age class were compared to population estimates based on simulated RSTS hauls ...

   Meeting Document : WG-FSA-04/74 : Auteur(s): S.G. Candy, C.R. Davies and A.J. Constable (Australia)

5. Demersal fish communities in the Ross Sea region of Antarctica: comparisons between video and trawl survey methods

   using the towed camera and at least one of the trawl types, allowing direct comparisons between sampling ... Abstract:  Reliable estimates of demersal fish community composition and population densities are ... essential for understanding the ecological effects of fisheries. Such estimates are conventionally derived ... . Using data collected during a survey of demersal fish communities in the Ross Sea region of Antarctica ...

   Meeting Document : WG-FSA-12/51 : Auteur(s): D.A. Bowden, S.M. Hanchet and P.M. Marriott (New Zealand)

6. An initial examination of using CPUE as a fishery performance index for the krill fishery

   Abstract:  Early analyses of CPUE in the krill fishery concluded that it was not a useful index of ... krill abundance. However, understanding the factors effecting the operation of the krill fishery and the ... extent to which these reflect changes in krill abundance are key elements of developing feedback ... management of the krill fishery. This analysis reviewed catch and effort data from the krill fishery for the ...

   Meeting Document : WG-EMM-16/10 : Auteur(s): CCAMLR Secretariat

7. A single-area stock assessment model of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea for the 2004/05 season

   ). A range of model sensitivities were examined, with the base case assuming the Ross Sea fishery as a ... evidence of non-convergence, particular in the declining right-hand limb of the fishing selectivity ... this would have little impact on the estimates of key model parameters and yield estimates. MCMC ... estimates of initial (equilibrium) spawning stock abundance (B0) were 69 400 t (95% credible intervals 47 ...

   Meeting Document : WG-FSA-05/33 : Auteur(s): A. Dunn, D.J. Gilbert and S.M. Hanchet (New Zealand)

8. Ecological implications of body composition and thermal capabilities in young Antarctic fur seals (Arctocephalus gazella)

   source of energy and a major component of insulation that allow them to meet these demands. To examine ... the role of lipid stores in a high-latitude pinniped, the body composition and thermoregulatory ... capabilities of Antarctic fur seal (Arctocephalus gazella) pups and yearlings were measured via flow-through ... respirometry and hydrogen isotope dilution. From these data we constructed a model to examine the importance of ...

   Meeting Document : WG-EMM-04/69 : Auteur(s): M.R. Rutishauser, D.P. Costa, M.E. Goebel and T.M. Williams (USA)

9. Updated description of Patagonian toothfish (Dissostichus eleginoides) tagging and ageing programs in Division 58.5.2, 1997–2015

   , considerably adding to information on the structure of the population. The ageing program at AAD has produced ... Abstract:  In 2014, CCAMLR endorsed a TAC of 4410 t of Patagonian toothfish in Division 58.5.2 ... an additional 2559 estimates of age, for fish captured during the 2014 and 2015 Random Stratified ... previous maximum age estimate of 42 years. These data have been used to develop age length keys and a ...

   Meeting Document : WG-FSA-15/55 : Auteur(s): D.C. Welsford, B. Farmer, T.D. Lamb, C. Péron, E. Woodcock and P.E. Ziegler (Australia)

10. Spatial distribution and swarm characteristics of Antarctic krill around the South Shetland Islands

    Abstract:  The spatial distribution and swarm characteristics of Antarctic krill were studied ... , thickness and length of swarms were estimated from the 120kHz data. The full spatial distributions of ... than the other three years. The results also indicated that more krill swarms located at deeper water ... majority of swarms were also found in the upper 100 m layer. The swarm-based method provides a promising ...

    Meeting Document : WG-EMM-18/42 : Auteur(s): X. Yu, X. Wang and X. Zhao

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