Résultats de la recherche

1. Analysis of krill fishery operations in Subarea 48.1: spatial-time distribution of CPUE and fishing efforts

   values of standardized CPUE indices in the Subarea 48.1 for the last 25 years. We continue to investigate ... the changes in fishing methods but is result of the influence of changing environment. Impact of ... management procedures for krill fishery in Subarea 48.1 as well as in Area 48. The source of this information ... Abstract:  In previous years we revealed that period 2006-2011 is characterized by the highest ...

   Meeting Document : WG-EMM-14/21 : Auteur(s): S. Kasatkina and P. Gasyukov (Russia)

2. Analysis of variability of krill size and fish by-catch in Japanese krill fishery based on scientific observer data

   –2008 were analysed by using a hierarchical Bayesian model. The models were composed of multistage ... biological process error in the population dynamics from fishery process as observation error. In both krill ... -temporal variability in size structure of krill population, which is presumably derived from large ... variability of recruitment causing difficulty in predicting krill population dynamics. Variances of observer ...

   Meeting Document : WG-EMM-12/68 : Auteur(s): T. Okuda and M. Kiyota (Japan)

3. Identification of marine Important Bird and Biodiversity Areas for penguins in South Shetland and South Orkney Islands: a comparison of two different approaches

   reported here provide a new method for the designation of a network of marine IBAs in Antarctic waters for ... on pre-existing approaches but revised according to the specific ecology of Pygoscelis penguin ... , and 2) revision of parameters for the kernel analysis (the smoothing factor and the utilization ... distribution); • We applied the revised method to 24 datasets of tracking data (three species, seven colonies ...

   Meeting Document : WG-EMM-17/35 : Auteur(s): M.P. Dias, A.P.B. Carneiro, V. Warwick-Evans, C. Harris, K. Lorenz, P. Trathan

4. INTERACTIONS OF PATAGONIAN TOOTHFISH FISHERIES WITH KILLER AND SPERM WHALES IN CROZET EXCLUSIVE ECONOMIC ZONE: AN ASSESSMENT OF DEPREDATION LEVELS AND INSIGHTS ON POSSIBLE MITIGATION SOLUTIONS

   belonging to four different pods were involved in 81.3% of the interaction events. We also estimated that a ... total of 64 sperm whales interacted with the fishery on the Crozet EEZ in 2008. Significant variations ... . Based on the analyse of killer whales movements in relation to fishing vessel, when facing depredation ... longline fishery is exposed to high levels of depredation by killer and sperm whales. In this context, this ...

   Meeting Document : WG-IMAF-09/12 : Auteur(s): P. Tixier, N. Gasco, G. Duhamel and C. Guinet (France)

5. ANALYSIS OF VARIABILITY OF KRILL SIZE AND FISH BY-CATCH IN JAPANESE KRILL FISHERY BASED ON SCIENTIFIC OBSERVER DATA

   hierarchical Bayesian model. The model was composed of multistage cluster units (i.e., years, subarea, vessels ... , and haul) based on a state-space model, which can separate biological process error in the population ... dynamics from observation error caused by the fishery activity and individual observation. In both krill ... variability of krill population structure and a difficulty in predicting krill population dynamics. Variances ...

   Meeting Document : WG-EMM-11/39 : Auteur(s): T. Okuda and M. Kiyota (Japan)

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

   to the use of ecosystem models in CCAMLR and the IWC and a history of the developmental work in those ... is currently in draft form open to comment and is being developed to provide an introduction to the ... organisations. It also provides an outline of the nature of modelling for these purposes and the general issues ... addressing uncertainties in this process. Lastly, it summarises the modelling platforms being developed in ...

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

7. Composition of Leucocytes in Peripheral Blood of Antarctic Toothfish Dissostichus mawsoni (Nototheniidae)

   Abstract:  The aim of the work is to study the leukocyte composition in blood of deep-water fish ... species by the example of Antarctic toothfish Dissostichus mawsoni. Fish were caught in January–February ... ) with average mass 21.4 kg and length 114 cm. The composition of leukocytes in Antarctic toothfish is ... 2012 in the Ross Sea (Statistical Subarea 88.1) at depths from 690 to 1183 m from onboard “Yantar-31 ...

   Meeting Document : WG-EMM-14/P07 : Auteur(s): I.I. Gordeev, D.V. Mikryakov, L.V. Balabanova and V.R. Miktyakov

8. Composition of leucocytes in peripheral blood of Antarctic toothfish Dissostichus mawsoni (Nototheniidae)

   Abstract:  The aim of the work is to study the leukocyte composition in blood of deep-water fish ... species by the example of Antarctic toothfish Dissostichus mawsoni. Fish were caught in January–February ... ) with average mass 21.4 kg and length 114 cm. The composition of leukocytes in Antarctic toothfish is ... 2012 in the Ross Sea (Statistical Subarea 88.1) at depths from 690 to 1183 m from onboard “Yantar-31 ...

   Meeting Document : WG-FSA-14/P01 : Auteur(s): I.I. Gordeev, D.V. Mikryakov, L.V. Balabanova and V.R. Miktyakov

9. Characteristics of interannual variation in aggregation and diurnal vertical migration of Antarctic krill at South Georgia during winter

   average krill body length in winter. This could be the optimal behavior of krill to balance food intake ... Abstract:  We elucidated characteristics of interannual variability in density index, recruitment ... predictable fishing grounds occurred in the restricted areas throughout the study period. Main results are as ... predator performance were poor in the previous summer. Krill recruitment index at South Georgia suggested ...

   Meeting Document : WG-EMM-18/34 : Auteur(s): T. Ichii, Y. Mori, P.N. Trathan, K. Mahapatra, M. Okazaki, T. Hayashi and T. Okuda

10. Assessment of escape mortality of Antarctic krill (Euphausia superba) in trawls

    escapees, thereafter kept on the surface in tanks to monitor rates of mortality. Hauling depth and duration ... Abstract:  The overall purpose of this study was to estimate the mortality rate of Antarctic krill ... (Euphausia superba) that escape from the most common mesh size used in the current commercial fishery. The ... January-February 2014. The method applied consisted of a covered trawl codend system for retaining ...

    Meeting Document : WG-EMM-14/14 : Auteur(s): B.A. Krafft (Norway) and L.A. Krag (Denmark)

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