Resultados de la búsqueda
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Joint Polish/American hydroacoustic survey of Elephant Island in the vicinity of King George Island, 1988
Abstract: The hydroacoustic survey found a low krill abundance in most areas covered by last ... years survey. The total biomass in the vicinity of Elephant Island was estimated from 120 kHz data to be ... 260 k tons and that in the Bransfield Strait South of King George Island was 39 k tons for a total of ... 299 k tons in the combined areas. The estimated 200 kHz survey data were higher, giving 715 k tons ...
Meeting Document : SC-CAMLR-VII/BG/21 : Autor(es): United States of America
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Review of CCAMLR activities on monitoring marine debris in the Convention Area
Abstract: The current status of national surveys on monitoring of marine debris and their impact ... on marine mammals and seabirds in the Convention Area has been reviewed. The CCAMLR Marine Debris ... debris for the first time from Marion Island (Subarea 58.7). There are 4 sites that have data for more ... wood items, reached a peak in the period 1994-1996 at Bird Island and Signy Island, but have declined ...
Meeting Document : SC-CAMLR-XXIV/BG/13 : Autor(es): Secretariat
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An interlaboratory comparison of ages estimated for Dissostichus eleginoides from the Argentine Sea, southwest Atlantic Ocean
the effects on readings of different otolith processing methods, scales and otoliths were taken from ... University, Norfolk, Virginia, United States of America. (CQFE). As a consequence of the exchange of otoliths ... carried out with NIWA, and the results presented, it is apparent that the NIWA preparation method produced ... a clearer section. More hyaline bands were visible in the NIWA preparations, particularly near the ...
Meeting Document : WG-FSA-04/45 : Autor(es): M.C. Cassia (Argentina), P.L. Horn (New Zealand) and J.R. Ashford (USA)
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By-catch of rays in the 2002/03 toothfish fishery around South Georgia
Abstract: The 2002/2003 fishing season was the first in which three new policies for rays were ... tried: • It was the first in which vessels were asked to cut off all rays at water level to assist ... survival and conservation of rays; • It was the first in which very good quality information was available ... from all observers’ tally periods on the catch rates of rays cut off the line; • In 2003 the UK, with ...
Meeting Document : WG-FSA-03/58 : Autor(es): D.J. Agnew, J. Pearce and M. Endicott (United Kingdom)
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First Annual Report of the CCAMLR Otolith Network, 2002
Abstract: This report presents results from the first exchange of otoliths under the auspices of ... the CCAMLR Otolith Network (CON), following the Workshop on Estimating Age in Patagonian Toothfish ... held at the Centre for Quantitative Fisheries Ecology (CQFE), Old Dominion University, United States ... , from 23 to 27 July 2001. The National Institute of Water and Atmospheric Research, Nelson, New Zealand ...
Meeting Document : WG-FSA-02/51
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Underwater noises produced by research vessels (some comments on acoustic sampling protocol for the Area 48 synoptic survey
Abstract: The underwater vessel noise levels perceived by the echosounder EK-500 transducers of ... three Russian research vessels have been presented. These data have been compared to the estimate of the ... underwater noise level, produced by the Icelandic R/V B.Saemundsson.. Underwater noise level perceived by the ... that the level of underwater noise produced by vessel is an important technical property to be taken ...
Meeting Document : WG-EMM-99/18 : Autor(es): S. Kasatkina (Russia)
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Improvements to the multiple-frequency method for in situ target strength measurements
Abstract: Refinements have been made to the multiple-frequency method that was recently developed ... to improve the accuracy and precision of in-situ target strength (TS) measurements using split-beam ... echosounders (Demer et al., J. Acoust. Soc. Am. 105(4) 2359:2376 (1999)]. The multiple-frequency method ... improves the rejection of unresolvable and constructively interfering target multiples by combining ...
Meeting Document : WG-EMM-99/38 : Autor(es): D.A. Demer (USA) and M.A. Soule (South Africa)
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Assessment models for Antarctic toothfish (Dissostichus mawsoni) in Subarea 88.2 SSRU 88.2E for the years 2002–03 to 2010–11
Abstract: We provide an update of the Bayesian sex and age structured population stock assessment ... model for Antarctic toothfish (Dissostichus mawsoni) in the SSRU 88.2E, using revised catch, catch-at ... -age and tag-recapture data from selected trips and all vessel trips. The 2011 reference case model ... resulted in a 30% higher estimate of initial biomass than for the 2009 base case. The main reason for this ...
Meeting Document : WG-FSA-11/44 : Autor(es): S. Mormede, A. Dunn and S.M. Hanchet (New Zealand)
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PENGUIN RESPONSES TO CLIMATE CHANGE IN THE SOUTHERN OCEAN
to climate change, which disrupts penguin life history strategies when it alters the weather ... , oceanography and critical habitats. For example, in the southwest Atlantic, the distributional range of the ice ... -obligate emperor and Ade´lie penguins has shifted poleward and contracted, while the ice-intolerant gentoo ... and chinstrap penguins have expanded their range southward. In the Southern Ocean, the El Niño ...
Meeting Document : WG-EMM-09/P09 : Autor(es): J. Forcada and P.N. Trathan
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Diet and feeding ecology of the diving petrels Pelecanoides georgicus and P. urinatrix at South Georgia
Abstract: The diet of the diving petrels Pelecanoides georgicus and P. urinatrix was studied ... Bird Island, South Georgia. The diet of both species was dominated by crustaceans. in particular ... euphausiids (mainly Euphausia superba and some ThysCll1oessa), which contributed 47-76% of the biomass of ... crustaceans in the diet of P. georgicus. and copepods, which contributed 71 % of the biomass of crustaceans in ...
Meeting Document : WG-EMM-97/10 : Autor(es): Croxall, J.P., Prince, P.A., Hill, H.J., Edwards, T.M., Reid, K.