Resultados de la búsqueda
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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 : Autor(es): P. Tixier, N. Gasco, G. Duhamel and C. Guinet (France)
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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 : Autor(es): T. Okuda and M. Kiyota (Japan)
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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 : Autor(es): A. Constable (Australia)
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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 : Autor(es): I.I. Gordeev, D.V. Mikryakov, L.V. Balabanova and V.R. Miktyakov
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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 : Autor(es): I.I. Gordeev, D.V. Mikryakov, L.V. Balabanova and V.R. Miktyakov
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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 : Autor(es): T. Ichii, Y. Mori, P.N. Trathan, K. Mahapatra, M. Okazaki, T. Hayashi and T. Okuda
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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 : Autor(es): B.A. Krafft (Norway) and L.A. Krag (Denmark)
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Survey estimates of recruitment of toothfish in Subarea 48.3
, the modal progression of peaks in the length densities corresponding to cohorts assessed by sequential ... data used by the Working Group for toothfish assessments in 1999 and later were correct. We found ... surveys. Length based analysis of these confirms the growth rate expected from the CCAMLR growth equation ... for South Georgia. Although it is easy to spot cohorts, the size of individual cohorts can not be ...
Meeting Document : WG-FSA-SAM-04/16 : Autor(es): Collins, M., Wakeford, R.C., Moir-Clark, J., Belchier, M., Agnew, D.J.
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A comparative morphometric analysis of sagittal otoliths of three icefishes (Channichthyidae) in Antarctic waters
Abstract: In the present study a comparative morphometric analysis of sagittal otoliths was ... differences between the left and right sagittae in BSDs, a univariate and multivariate ANOVA and MANOVA were ... from the 20 harmonics analyzed were homoscedastic and normal, and showed very low level of correlation ... in the contour between both otolith pairs for each species (p<0.001). Similarly, EFS coefficients ...
Meeting Document : WG-FSA-18/47 : Autor(es): G. Plaza, C. Rodríguez-Valentino and P.M. Arana
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Validation of age determination in Notothenia coriiceps, by means of a tag-recapture experiment at potter cover, South Shetland Islands
of 11-21 months. A comparison was carried out between the annuli found in scales removed before and ... after the period of liberty. In scales of those specimens recovered after 11-13 months, one extra ... deposition of the annulus in scales and otoliths of N. coriiceps. A preliminary analysis of scales ... Shetland Islands, in successive years from 1989 to 1992, 9 were recaptured at the same site after periods ...
Meeting Document : WG-FSA-94/12 : Autor(es): E.R. Barrera-Oro and R.J. Casaux (Argentina)