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Les résultats du suivi annuel effectué par les AIA (Apiary Inspectors of America) et l'USDA (US Department of Agriculture) sur les pertes hivernales de colonies d'élevage semble montrer que cette année (hiver 2010-2011), ces pertes seraient de l'ordre de 30%. En 2009-2010, elles étaient de 34%; en 2008-2009, de 29%; en 2007-2008, de 36%; en 2006-2007, de 32%. Ce que l'on appelle de CCD est il en cause? Pas seulement si l'on considère que le CCD est défini aux USA, en autre, par une effondrement de la colonie avec une disparition complète ou pratiquement des abeilles de la ruche.
APIVET 25/05/11 Aux USA, les pertes hivernales du cheptel apicole 2010-2011 seraient de 30%
Colony collapse disorder (CCD) is characterized by the unexplained losses of large numbers of adult worker bees (Apis mellifera) from apparently healthy colonies. Although infections, toxins, and other stressors have been associated with the onset of CCD, the pathogenesis of this disorder remains obscure. Recently, a proteomics study implicated a double-stranded DNA virus, invertebrate iridescent virus (Family Iridoviridae) along with a microsporidium (Nosema sp.) as the cause of CCD.
PLOS 30/06/11 Lack of Evidence for an Association between Iridovirus and Colony Collapse Disorder
ARS USDA 13/09/11 Questions and Answers: Colony Collapse Disorder
Beginning in October 2006, some beekeepers began reporting losses of 30-90 percent of their hives. While colony losses are not unexpected during winter weather, the magnitude of loss suffered by some beekeepers was highly unusual. This phenomenon, which currently does not have a recognizable underlying cause, has been termed "Colony Collapse Disorder" (CCD).
Working in the lab, from left, are Michelle Flenniken, a postdoctoral scholar, Joseph DeRisi, PhD, a Howard Hughes Medical Institute investigator and professor of biochemistry and biophysics at UCSF, and Charles Runckel, a graduate student. A 10-month study of healthy honey bees by University of California, San Francisco (UCSF) scientists has identified four new viruses that infect bees, while revealing that each of the viruses or bacteria previously linked to colony collapse is present in healthy hives as well. The study, which followed 20 colonies in a commercial beekeeping operation of more than 70,000 hives as they were transported across the country pollinating crops, was conducted to answer one basic question: what viruses and bacteria exist in a normal colony throughout the year? The results depict a distinct pattern of infections through the seasons and provide a normal baseline for researchers studying a colony – the bee population within a hive – that has collapsed.
UNIVERSITY OF CALIFORNIA SAN FRANCISCO 07/06/11 UCSF Finds New Bee Viruses, Offers Baseline to Study Colony Collapse
Les abeilles sont des espèces primordiales pour la pollinisation des cultures. Selon Edward B. Knipling, administrateur de l'ARS, près de 130 types de cultures aux Etats-Unis sont dépendantes de la pollinisation.
BE Etats-Unis 231 >> 14/01/2011 Recherche agronomique/Science des alimentsSyndrome d'effondrement des colonies d'abeilles : le d
