Preliminary analysis of loss rates of honey bee colonies during winter 2015/16 from the COLOSS survey. Issue 5 (5th December 2016)

• Record Type: Journal Article
• Authors: Brodschneider, Robert; Gray, Alison; van der Zee, Romée; Adjlane, Noureddine; Brusbardis, Valters; Charrière, Jean-Daniel; Chlebo, Robert; Coffey, Mary F; Crailsheim, Karl; Dahle, Bjørn; Danihlík, Jiří; Danneels, Ellen; de Graaf, Dirk C; Dražić, Marica Maja; Fedoriak, Mariia; Forsythe, Ivan; Golubovski, Miroljub; Gregorc, Ales; Grzęda, Urszula; Hubbuck, Ian; İvgin Tunca, Rahşan; Kauko, Lassi; Kilpinen, Ole; Kretavicius, Justinas; Kristiansen, Preben; Martikkala, Maritta; Martín-Hernández, Raquel; Mutinelli, Franco; Peterson, Magnus; Otten, Christoph; Ozkirim, Aslı; Raudmets, Aivar; Simon-Delso, Noa; Soroker, Victoria; Topolska, Grazyna; Vallon, Julien; Vejsnæs, Flemming; Woehl, Saskia;
• Is Part Of: Journal of apicultural research. Volume 55:Issue 5(2016)
• Page Start: 375
• Page End: 378
• Publication Date: 2016-12-05
• Subjects: Apis mellifera -- apiculture -- colony loss -- monitoring -- winter survival -- beekeeping -- survey -- citizen science; Bee culture -- Periodicals; Bee culture; Periodicals; 638.105
• DOI: 10.1080/00218839.2016.1260240
• Languages: English
• ISSNs: 0021-8839

Abstract

Abstract : In this short note we present comparable loss rates of honey bee colonies during winter 2015/16 from 29 countries, obtained with the COLOSS questionnaire. Altogether, we received valid answers from 19, 952 beekeepers. These beekeepers collectively wintered 421, 238 colonies, and reported 18, 587 colonies with unsolvable queen problems and 32, 048 dead colonies after winter. This gives an overall loss rate of 12.0% (95% confidence interval 11.8–12.2%) during winter 2015/16, with marked differences among countries. Beekeepers in the present study assessed 7.6% (95% CI 7.4–7.8%) of their colonies as dead or empty, and 4.4% (95% CI 4.3–4.5%) as having unsolvable queen problems after winter. The overall analysis showed that small operations suffered higher losses than larger ones. A table with detailed results and a map showing response and relative risks at regional level are presented.