Resultados de la búsqueda
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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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Peculiarities of icefish Champsocephalus gunnari (Channichthyidae) distribution in South Georgia area during the surveys made by STM Atlantida in 2000 and 2002
surveys made by STM “Atlantida” are revealed. Availability of large icefish concentrations in 2000 in the ... northwest shelf area in 10-100m layer resulted in formation of adult fish aggregations in water column. The ... the bottom even in dark hours of the day. During the two surveys, fry and immature fish occurred in ... numbers in pelagic zone. At present, the population mainly consists of immature and first maturing fish ...
Meeting Document : WG-FSA-03/55 : Autor(es): Zh.A. Frolkina, S.M. Kasatkina and N.N. Zhigalova (Russia)
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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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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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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.
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Consumption of krill by minke whales in Areas IV and V of the Antarctic
Abstract: The consumption of Antarctic krill (Euphausia superba) by the southern minke whale ... (Balaenoptera acutorostrata) in Areas IV and V of the Antarctic was estimated from diurnal change in the ... forestomach content mass, standard metabolism and the body mass increase methods based on JARPA (the Japanese ... Whale Research Program Under Special Permit in the Antarctic) data. Estimates of the daily food ...
Meeting Document : WG-EMM-97/17 : Autor(es): Fujise, Y., Tamura, T., Ichii, T.
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Population dynamics of wandering albatross Diomedea exulans and Amsterdam albatross D. amsterdamensis in the Indian Ocean and their relationships with longline fisheries: conservation implications
Abstract: Studies carried out over the past three decades at Crozet and Kerguelen Islands in the ... 1986 have shown slow recovery. The population of the endangered Amsterdam albatross Diomedea ... study of the Crozet population indicates that the earlier decline was mainly the result of increased ... band recoveries of non breeding birds indicate that during and outside the breeding season these ...
Meeting Document : WG-FSA-96/09 : Autor(es): Jouventin, P., Brothers, N., Weimerskirch, H.
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Gentoo penguin Pygoscelis papua diet as an indicator of planktonic availability in the Kerguelen Islands
Abstract: Since penguins rely on the main planktonic resources of the Southern Ocean, knowledge ... , we investigated the composition of the diet of gentoo penguins, Pygoscelis papua, in relation to ... changes in the availability of two prey species, Euphausia vallentini and Themisto gaudichaudii, sampled ... during plankton surveys in the Kerguelen Islands. The comparison between plankton surveys and diet ...
Meeting Document : WG-Joint-94/11 : Autor(es): C.A. Bost, P. Koubbi, F. Genevois, L. Ruchon and V. Ridoux (France)