Résultats de la recherche
-
Relationships between distribution of two euphausiid species and oceanographic characteristics in the Ross Sea (January–February 2000)
, devoted to study two krill species (Euphausia superba and Euphausia crystallorophias), was carried out in ... identifying main water masses and oceanographic features. Acoustic data were processed in order to distinguish ... first time a detailed description of the krill distribution in the Ross Sea area related to ... crystallorophias one. The first species was almost exclusively present in the northern area, interesting only a ...
Meeting Document : WG-EMM-02/38 : Auteur(s): A. Russo, M. Azzali, E. Biffi, G. Lanciani and E. Paschine (Italy)
-
Exploitation of mesoscale oceanographic features by grey-headed albatross Thalassarche chrysostoma in the southern Indian Ocean
association with mesoscale oceanographic features, as identified by sea surface height anomalies, in the ... anomalies created by the Agulhas Return Current in the Subtropical Convergence and the Subantarctic zones ... . In contrast, during chick-rearing all tracked birds foraged to the southwest of the island, at the ... edges of anomalies along the South-West Indian Ridge. Previous work in this area has shown that these ...
Meeting Document : WG-FSA-01/12 : Auteur(s): D.C. Nel, J.R.E. Lutjeharms, E.A. Pakhomov, I.J. Ansorge, P.G. Ryan and N.T.W. Klages (South Africa)
-
The influence of environmental variables and mitigation measures on seabird catch rates in the Japanese tuna longline fishery within the Australian Fishing Zone, 1991–1995
environmental variables and mitigation measures upon catch rates of seabirds in the Japanese pelagic longline ... fishery. In the Australian Fishing Zone (AFZ) seabirds were most likely to be caught on longlines that ... were set during summer, in southern areas of the zone, and during daylight hours. However ... , interpretation of changes in catch rates resulting from the use of mitigation measures or from weather effects ...
Meeting Document : WG-FSA-98/32 : Auteur(s): N. Brothers, R. Gales and T. Reid (Australia)
-
MULTIPLE INDICATORS SUGGEST A STRONG ECOSYSTEM ANOMALY AT SOUTH GEORGIA IN 2009
local oceanographic and atmospheric conditions. Much of the observed variability in various fitness ... revealed a strong anomaly in early 2009. Above average sea temperatures, without any evidence of increased ... warm water inflow were followed by reduced icefish catches, a paucity of krill in icefish and penguin ... diets and low krill biomass in the regularly surveyed “Western Core Box”. Consequently many of the ...
Meeting Document : WG-EMM-09/23 : Auteur(s): S. Hill, M. Belchier, M. Collins, S. Fielding, E. Murphy, P. Trathan, H. Venables and C. Waluda (United Kingdom)
-
ANTARCTIC TOOTHFISH STOCK ASSESSMENT IN DIVISION 58.4.1 ON THE BASIS OF CPUE DATA
Abstract: An attempt to use CPUE data based on data of erussian observers in the assessment of ... Antarctic toothfish stock in division 58.4.1 is made. Unlike some previous results obtained for this ... biomass in the Ross Sea. As a result of implementation of a dynamic production model, current biomass in ... : ANTARCTIC TOOTHFISH STOCK ASSESSMENT IN DIVISION 58.4.1 ON THE BASIS OF CPUE DATA Approval: Approved ...
Meeting Document : WG-SAM-09/12 : Auteur(s): D. Vasilyev, K. Shust, V. Tatarnikov, I. Istomin and A. Petrov (Russia)
-
Echo integration in low signal to noise regimes: methods of noise estimation and removal
Abstract: The results of acoustic surveys, especially in low signal-to-noise regimes, are ... contribution to the above-threshold-signal cannot later be removed in post processing. The only solution is to ... log unthresholded data and to correct for noise in post processing. Integrated data collected at 120 ... requires that logged data have high resolution in both depth and distance. It can be applied so long as ...
Meeting Document : WG-EMM-97/74 : Auteur(s): Higginbottom, I., Pauly, T.
-
An outline of the Antarctic research cruise by the Japanese RV Kaiyo Maru around the South Shetland Islands in 1994/95
Agency was conducted in the southwest of the Scotia Sea, especially in the vicinity of the South Shetland ... oceanographic and ecological survey in relation to the distribution and abundance of the Antarctic krill ... analytical studies are currently in progress. Author(s): Takao, T., Ogishima, T., Naganobu, M., Ichii, T ... South Shetland Islands in 1994/95 Approval: Approved ...
Meeting Document : WG-EMM-95/50 : Auteur(s): Takao, T., Ogishima, T., Naganobu, M., Ichii, T., Kawaguchi, S.
-
Towards a new method for age determination in Antarctic krill, and evidence that krill shrink under natural conditions
maintained in conditions of low food availability. Recent studies have also demonstrated that E. superba ... individuals may be shrinking in the field during winter. If krill shrink during the winter, conclusions ... reached by length-frequency analysis may be unreliable. In this study, the correlation between the body ... -length and the crystalline cone number of the compound eye was examined. Samples collected in the late ...
Meeting Document : WG-Krill-94/17 : Auteur(s): W. de la Mare (Australia)
-
Net escapement of Antarctic krill in trawls
Abstract: This document describes the aims and methodology of a three year project (commenced in ... 2012) entitled Net Escapement of Antarctic krill in Trawls (NEAT). The study will include a morphology ... . Results will be used to quantify the theoretic catch efficiency and escape mortality in different net ... selective properties for krill in different trawls. Author(s): B.A. Krafft (Norway), L.A. Krag, B. Herrmann ...
Meeting Document : WG-EMM-12/24 : Auteur(s): B.A. Krafft (Norway), L.A. Krag, B. Herrmann (Denmark), A. Engås, S. Nordrum and S. Iversen (Norway)
-
Foraging zones of the two sibling species of giant petrels in the Indian Ocean throughout the annual cycle: implication for their conservation
provided by ARGOS PTT. In order to assess differences in bycatch susceptibility, comparisons were made ... . Overall, in adults, all stages remained close to nesting sites, during and outside the breeding season ... , while juveniles dispersed throughout the southern ocean. In adults, the intersexual differences were ... higher than interspecific ones, with females showing a greater distribution range than males in both ...
Meeting Document : WG-FSA-12/67 : Auteur(s): L. Thiers, K. Delord, C. Barbraud (France), R.A. Phillips (United Kingdom) and H. Weimerskirch (France)