Resultados de la búsqueda
-
Climate change and zooplankton dominance in the Antarctic marine ecosystem: implications for the food web
has been warming over the past 40 years with an associated decreased frequency of winters with ... population dynamics of salps (Salpa thompsoni). Strong krill recruitment success there follows years of ... years suggests that the food web may be affected by climate change. The 1994/95 austral summer season ... followed the first prolonged winter sea-ice season in three years and provides a strong contrast to the ...
Meeting Document : WG-EMM-96/21 : Autor(es): Siegel, V., Fraser, W., Trivelpiece, S., Holm-Hansen, O., Loeb, V., Hewitt, R., Trivelpiece, W.
-
Population change in gentoo penguins Pygoscelis papua at South Georgia: potential roles of adult survival, recruitment and deferred breeding
one year, and for part of the differences in two other years, when mortality rates must also have been ... variations introduced by good and bad years (as classified on the basis of breeding success). There is ... generally good agreement between observed and predicted breeding populations, except in four years, when ... years were associated with reduced availability of krill, one with very cold winter and spring ...
Meeting Document : WG-CEMP-93/08 : Autor(es): J.P. Croxall and P. Rothery (United Kingdom)
-
Southern right whale (Eubalaena australis) reproductive success is influenced by krill (Euphausia superba) density and climate
correlations were found with krill densities (r = 0.69, p = 0.002, lag 0 years), Oceanic Niño Index (r = −0.65 ... , p = 0.03, lag 6 years), Antarctic Oscillation (r = 0.76, p = 0.01, lag 7 years) and Antarctic sea ... ice area (r = −0.68, p = 0.002, lag 0 years). Our results suggest that global climate indices ... ) availability for the species. Therefore, increased frequency of years with reduced krill abundance, due to ...
Meeting Document : WG-EMM-16/P06 : Autor(es): E. Seyboth, K.R. Groch, L. Dalla Rosa, K. Reid, P.A.C. Flores and E.R. Secchi
-
Investigation of the sensitivity of the Ross Sea toothfish assessment to withholding subsets of the available data
model outputs of withholding from a stock assessment between one and eight years of age frequency and/or ... time as more years’ data becomes available. The 2009 stock assessment of Antarctic toothfish in the ... estimated by the models arising from withholding data was found to be highest in the earlier years of stock ... years, the change in estimated biomass arising from withholding data was much smaller, with values ...
Meeting Document : WG-SAM-11/17 : Autor(es): S. Mormede (New Zealand)
-
Using stationary acoustic platforms to assess precision and accuracy of acoustical krill surveys
a depth of ~20 m during daytime, while 24 % was found above ~20 m during night. A swarm detection ... approach suggested a similar pattern, 7 % of aggregated backscatter was found above ~20 m during daytime ...
Meeting Document : WG-EMM-2019/32 : Autor(es): T. Klevjer, G. Skaret and B.A. Krafft
-
Dynamics of Notothenia rossii rossii size-age structure on the Kerguelen Islands shelf
used to characterise the age composition. It was determined that in the initial years of exploitation ... catches and in some years (1981-1985) fisheries were based practically on recruitment. After the closure ... . In May-June 1991 the mean length was 59.2 cm, mean age was 7.4 years; some 70% of catch consisted of ... that observed in the initial years of exploitation and further closure of marbled rockcod specialised ...
Meeting Document : WG-FSA-94/04 : Autor(es): P.B. Tankevich (Ukraine)
-
Interannual changes in body fat condition, stomach content mass and distribution of minke whales in Antarctic Areas IV and V
the six years included in the study, two were categorized as years of poor body fat condition, and ... three as years of good condition. Estimated body weight gain during the feeding season in poor years was ... 25 % lower than in good years. The relationship between girth and stomach content mass in the ice ... . In Area V, in a year of high sea-ice extent, the krill-rich slope region in the western zone was ...
Meeting Document : WG-EMM-97/18 : Autor(es): Ichii, T., Nishiwaki, S., Tamura, T., Fujise, Y., Matsuoka , K.
-
Informe del Grupo de Trabajo de Seguimiento y Ordenación del Ecosistema
Kingdom, 9 to 13 July 2018) Approval: Approved Secretariat Workflow Status: Content Approved Document ...
Meeting Document : SC-CAMLR-XXXVII/03
-
Review of the technical recommendations for the Patagonian toothfish fishery in order to minimize by-catch
together socio-economic aspects and fishery history, steps implemented by each vessel to minimize avian ...
Meeting Document : SC-CAMLR-XXX/BG/10 : Autor(es): Delegation of France
-
AN ECOSYSTEM-BASED MANAGEMENT PROCEDURE FOR KRILL FISHERIES: A METHOD FOR DETERMINING SPATIALLY-STRUCTURED CATCH LIMITS TO MANAGE RISK OF SIGNIFICANT LOCALISED FISHERIES IMPACTS ON PREDATORS.
krill fisheries which draws together past experience in CCAMLR. It provides an empirical ecosystem ...
Meeting Document : WG-SAM-08/16 : Autor(es): A. Constable and S. Candy (Australia)