Resultados de la búsqueda
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The use of predator-derived krill length-frequency distributions to calculate krill target strength
predators to provide a length-frequency distribution of krill at times when it is possible to run automated ... krill biomass at times of the season hitherto unavailable from ship-board scientific surveys. Author(s ... ecosystem based approach to resource management. We propose a method using krill sampled from the diet of ... operations. This will allow a robust estimate of krill abundance to be estimated from acoustic data. Changes ...
Meeting Document : WG-EMM-00/42 : Autor(es): K. Reid and A.S. Brierley (United Kingdom)
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Diet composition of Dissostichus eleginoides in Subarea 48.3, Dr Eduardo Holmberg survey March/April 1996
Abstract: A diet analysis of the patagonian toothfish Diissostichus eleginoides in the Subarea ... 48.3 in March/April 1996 was carried out by frequency of occurrence (F%) and coefficient "Q" ... ; (%) methods. The samples consisted chiefly of immature specimens, with predominant length ranges of 30-70 cm ... (TL). Fish was by far the main food at SR and SG (63 % as sole prey). Krill appeared as secondary food ...
Meeting Document : WG-FSA-96/29 : Autor(es): Barrera-Oro, E., Marschoff, E., Casaux, R.
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The factors causing impact on the toothfish catch estimation on board of fishing vessels
Abstract: The toothfish catch estimation on board of fishing vessels at the CCAMLR area is being ... done often in a difficult weather conditions at sea, which can cause a negative impact on the ... measurement equipment. Besides, until today the “green weight” of the toothfish catch on fishing vessels was ... not estimated directly, but by calculation, based on the weight of the production using appropriate ...
Meeting Document : WG-SAM-2019/14 : Autor(es): K. Demianenko, P. Zabroda, I. Slypko, L. Pshenichnov, A. Bazhan, O. Diripasko and D. Marichev
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Detection of predator dive patterns from stationary echosounder data
clear patterns in the dive data with regards to time of year as well as time of day. At the temporal ... Abstract: Standard protocols for processing of echosounder data are geared towards the estimation ... of biomass indices of pelagic organisms. More transient visitors to the watercolumn however also give ... echoes, and the data provided by the echosounders may be used to assess the behaviour of these organisms ...
Meeting Document : WG-EMM-2019/34 : Autor(es): T. Klevjer and G. Skaret
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By-catch of fishes caught by the fishery vessel Niitaka Maru in the South Georgia area (August to September 2004)
composed of at least 3 different year classes. Similar pattern is also found in Gymnoscopelus nicholsi of ... the Myctophidae. At least in the net hauls of high krill CPUE (>20t?krill/h), few or no by-catch ... by F/V Niitaka Maru (5306t) were made from August 6 to September 9, 2004 to the north of South ... Georgia Island. Among 100 net hauls quantitatively examined, a total of 12 species belonging to 6 families ...
Meeting Document : WG-EMM-05/19 : Autor(es): T. Iwami, T. Hayashi, K. Taki and M. Naganobu (Japan)
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Indices of prey availability near the Seal Island CEMP site: 1990 through 1996
AMLR surveys each year were sub-sampled to include the foraging range of predators breeding at Seal ... compared with indices of predator performance at Seal Island. The depth of the prey field and its distance ... Abstract: Four indices of prey availability are calculated for prey surveys conducted in the ... vicinity of the Seal Island CEMP site during the austral summers of 1990-96. The indices are measures of ...
Meeting Document : WG-EMM-96/22 : Autor(es): Hewitt, R.P., Demer, D.A., Watters, G.
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Information on the spawning of Dissostichus mawsoni from Subareas 88.1 and 88.2 in the 2003/04 season
. The onset of spawning in D. mawsoni is in December and continues until at least June, in both Sub ... Abstract: Data on maturity, gonadosomatic index (GSI) and length weight of Antarctic Toothfish ... -areas 88.1 and 88.2, and spawning occurs on isolated geographic features north of the main Antarctic ... shelf areas. One of the mature fish caught in Sub Area 88.2 had originally been tagged in McMurdo Sound ...
Meeting Document : WG-FSA-04/34 : Autor(es): G.J. Patchell (New Zealand)
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Progress report of the CEMP camera network in Subarea 48.1
of pre-existing cameras at some sites enabled validation studies to be completed and partial network ... Abstract: We provide a brief update on the progress of our project “Establishing a CEMP Camera ... project is now running, with 53 time-lapse cameras installed throughout Subarea 48.1. Installation of ... coverage of breeding chronology and success estimates for 2015/16. We were also able to develop methods ...
Meeting Document : WG-EMM-16/58 : Autor(es): J. Hinke, G. Watters, M. Santos, M. Korczak-Abshire, G. Milinevsky, A. Barbos, C. Southwell and L. Emmerson
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DEVELOPMENT OF SPATIALLY EXPLICIT AGE-STRUCTURED POPULATION DYNAMICS OPERATING MODELS FOR ANTARCTIC TOOTHFISH IN THE ROSS SEA
plus group of the proportions-at-age catch data were less than ideal. Model estimates of proportions ... other factors to quantify risk and uncertainties for management of the Ross Sea Antarctic toothfish ... program allows implementation of an aggregate movement model for use with large numbers of areas as a ... mortality), as well as movement processes defined as the product of a set of preference functions that are ...
Meeting Document : WG-SAM-09/18 : Autor(es): A. Dunn, S. Rasmussen and S. Hanchet (New Zealand)
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Further development of coarse- and medium-scale spatially explicit population dynamics operating models for Antarctic toothfish in the Ross Sea region
proportions-at-age observations were generally good in most models, although fits to the plus group of the ... proportions-at-age catch data were less than ideal. Model estimates of proportions-mature appeared to be ... program allows implementation of an aggregate movement model for use with large numbers of areas as a ... mortality), as well as movement processes defined as the product of a set of preference functions that are ...
Meeting Document : WG-FSA-12/44 : Autor(es): S. Mormede, A. Dunn, S. Parker and S. Hanchet (New Zealand)