Résultats de la recherche
-
A simulation study of krill fishing by an individual Japanese trawler (SC-CAMLR-VI/BG/37)
Abstract: A model is set up for the operation (which includes both searching and fishing) of a ... whose parameters are determined primarily from the scientific FIBEX surveys. Output from the model of ... the operation is compared with (and partially tuned to) statistics for a sample of data from the ... than in the model. Two ad hoc model modifications are introduced to eliminate this inconsistency ...
Meeting Document : WS-KCPUE-89/04 : Auteur(s): D.S. Butterworth (South Africa)
-
A simulation study of krill fishing by an individual JAPANESE trawler
Abstract: A model is set up for the operation (which includes both searching and fishing) of a ... whose parameters are determined primarily from the scientific FIBEX surveys. Output from the model of ... the operation is compared with (and partially tuned to) statistics for a sample of data from the ... than in the model. Two ad hoc model modifications are introduced to eliminate this inconsistency ...
Meeting Document : SC-CAMLR-VII/BG/37 : Auteur(s): D.S. Butterworth (Invited Expert)
-
Diets of Antarctic toothfish estimated from fatty acids and stable isotopes
Antarctic toothfish, by-catch and their stomach contents were collected for the past five years in the eight ... the particular importance of accumulation of lipid deposits in their tissue. Toothfish trophic niche ... resource utilization between the Ross Sea shelf (RSS) and the deep-sea slopes the western Indian Ocean ... sector (IOS) and the slope towards the Pacific Ocean sector (POS). FA profiles of toothfish were ...
Meeting Document : WG-FSA-17/12 : Auteur(s): C.-K. Kang, S.-G. Choi, J. Lee, J. Lee and D. An
-
Report on fish by-catch on exploratory fishing in Divisions 58.4.1 and 58.4.2
undertaken in Divisions 58.4.1 and 58.4.2 during the 2012 to 2018 seasons. Fish by-catch comprised 14 species ... or groups of species. In 2018, by-catch represented 12% of the total catch (43 tonnes over 307 tonnes ... of Dissostichus spp.) in Divisions 58.4.1 and 58.4.2. 98% of the biomass was represented by 2 ... families: Macrouridae and Channichthyidae. The others most common by-catch species or families were ...
Meeting Document : WG-FSA-18/28 : Auteur(s): C. Péron, P. Yates, D. Maschette, C. Chazeau, P. Ziegler, D. Welsford, N. Gasco and G. Duhamel
-
ADÉLIE PENGUIN SURVIVAL: AGE STRUCTURE, TEMPORAL VARIABILITY AND ENVIRONMENTAL INFLUENCES
Abstract: The driving factors of survival, a key demographic process, have been particularly ... challenging to study, especially for winter migratory species such as the Adélie penguin (Pygoscelis adeliae ... what environmental features they are most likely to respond to. Here we examine the influence of ... environmental fluctuations, broad climatic conditions and the success of the breeding season prior to winter on ...
Meeting Document : WG-EMM-11/P4 : Auteur(s): L. Emmerson and C. Southwell
-
Variability of krill biomass estimates in repeated mesoscale surveys in relation to CCAMLR-2000 Survey
Abstract: One of the important problems in interpreting CCAMLR-2000 results is how they reflect ... the krill biomass status, is it high, medium or low at the present time. The comparative analysis of ... , covering the main part of the CCAMLR-2000 area, were used: RV “Argus” (27.01.84-16.03.84) and RV “Evrika ... ) and methods of sampling, but sampling was carried out in the 0-100 m water layer instead 0-200 m in ...
Meeting Document : WG-EMM-01/28 : Auteur(s): V.A. Sushin, F.F. Litvinov (Russia) and V. Siegel (Germany)
-
A REVIEW OF BIAS AND UNCERTAINTY IN ANTARCTIC PACK-ICE SEAL ABUNDANCE ESTIMATES
Abstract: While the joint CCAMLR-IWC workshop will consider a number of parameters for species ... of pack-ice seals focuses primarily on abundance and to a lesser extent trends in abundance. The ... review addresses population surveys and abundance estimates for the four species of phocid seal commonly ... encountered in the pack-ice and fast-ice surrounding Antarctica (crabeater seal Lobodon carcinophaga, Ross ...
Meeting Document : CCAMLR-IWC-WS-08/06 : Auteur(s): Steinhage, D., Bengtson, J., Blix, A.S., Bester, M., Boveng, P., Laake, J., Cameron, M., Nordøy, E., Forcada, J., Stewart, B., Southwell, C., Trathan, P., Rogers, T., Plotz, J., Bornemann, H.
-
Dietary segregation of krill-eating South Georgia seabirds
Abstract: The diets of six of the main seabird species (two petrels, two albatrosses, two ... penguins) breeding at Bird Island, South Georgia were studied simultaneously during the chick-rearing ... period in 1986. For five species, Antarctic krill Euphausia superba was the main food (39-98% by mass ... ); grey-headed albatrosses took mainly the ommastrephids squid Martialia hyadesi (71 %) and only 16% krill ...
Meeting Document : WG-EMM-97/15 : Auteur(s): Prince, P.A., Croxall, J.P., Reid, K.
-
Krill biomass and distribution in Subarea 48.2 during summer 1996
Abstract: The results of hydroacoustic survey of krill biomass assessment in Subarea 48.2 ... , hydrorological conditions during surveys are also discussed in the paper. Average weighed density of krill in the ... study area amounted to 17 g/sq.m, obtained on the basis of diurnal surveys, and average weighted krill ... density in the day-time amounted to 30.4 g/sq.m are comparable with density values, observed in the ...
Meeting Document : WG-EMM-97/49 : Auteur(s): Kasatkina, S.M., Abramov, A.M., Polischuk, M.I., Sushin, V.A.
-
Krill biomass and distribution variability in Subarea 48.3 in June 1991
Abstract: Temporal and spatial variability of krill distribution features was investigated at the ... statistical parameters of swarms at polygon varied insignificantly from survey to survey, while the swarm ... number varied within the broad range from 1918 to 7000 and further to 1554 units. Krill biomass at ... polygon varied spasmodically within the range from 1091 to 6085 t. Krill distribution variability revealed ...
Meeting Document : WG-CEMP-92/35 : Auteur(s): S.M. Kasatkina, E.I. Timokhin, P.P. Fedulov and K.E. Shulgovskiy (Russian Federation)