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Preliminary analysis of loss rates of honey bee colonies during winter 2015/16 from the COLOSS survey

2016; Taylor & Francis; Volume: 55; Issue: 5 Linguagem: Inglês

10.1080/00218839.2016.1260240

2078-6913

Robert Brodschneider, Alison Gray, R. van der Zee, Noureddine Adjlane, Valters Brusbārdis, Jean‐Daniel Charrière, Róbert Chlebo, Mary F. Coffey, Karl Crailsheim, Bjørn Dahle, Jiří Danihlík, Ellen Danneels, Dirk C. de Graaf, Marica Maja Dražić, Mariia Fedorіak, Ivan Forsythe, Miroljub Golubovski, Aleš Gregorc, Urszula Grzęda, Ian Hubbuck, Rahşan İvgi̇n Tunca, Lassi Kauko, Ole Kilpinen, Justinas Kretavičius, Preben Kristiansen, Maritta Martikkala, Raquel Martín‐Hernández, Franco Mutinelli, Magnus Peterson, Christoph Otten, Asli Özkırım, Aivar Raudmets, Noa Simon‐Delso, Victoria Soroker, G. Topolska, Julien Vallon, Flemming Vejsnæs, Saskia Woehl,

Plant and animal studies

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.