TY  - JOUR
AU  - Gray, Alison
AU  - Adjlane, Noureddine
AU  - Arab, Arab
AU  - Ballis, Alexis
AU  - Brusbardis, Valters
AU  - Charrière, Jean-Daniel
AU  - Chlebo, Robert
AU  - Coffey, Mary F.
AU  - Cornelissen, Bram
AU  - Amaro da Costa, Cristina
AU  - Dahle, Bjørn
AU  - Danihlík, Jiří
AU  - Dražić, Marica Maja
AU  - Evans, Garth
AU  - Fedoriak, Mariia
AU  - Forsythe, Ivan
AU  - Gajda, Anna
AU  - de Graaf, Dirk C.
AU  - Gregorc, Aleš
AU  - Ilieva, Iliyana
AU  - Johannesen, Jes
AU  - Kauko, Lassi
AU  - Kristiansen, Preben
AU  - Martikkala, Maritta
AU  - Martín-Hernández, Raquel
AU  - Medina-Flores, Carlos Aurelio
AU  - Mutinelli, Franco
AU  - Patalano, Solenn
AU  - Raudmets, Aivar
AU  - Martin, Gilles San
AU  - Soroker, Victoria
AU  - Stevanović, Jevrosima
AU  - Uzunov, Aleksandar
AU  - Vejsnaes, Flemming
AU  - Williams, Anthony
AU  - Zammit-Mangion, Marion
AU  - Brodschneider, Robert
PY  - 2020
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/1983
AB  - This article presents managed honey bee colony loss rates over winter 2018/19 resulting from using the standardised COLOSS questionnaire in 35 countries (31 in Europe). In total, 28,629 beekeepers supplying valid loss data wintered 738,233 colonies, and reported 29,912 (4.1%, 95% confidence interval (CI) 4.0–4.1%) colonies with unsolvable queen problems, 79,146 (10.7%, 95% CI 10.5–10.9%) dead colonies after winter and 13,895 colonies (1.9%, 95% CI 1.8–2.0%) lost through natural disaster. This gave an overall colony winter loss rate of 16.7% (95% CI 16.4–16.9%), varying greatly between countries, from 5.8% to 32.0%. We modelled the risk of loss as a dead/empty colony or from unresolvable queen problems, and found that, overall, larger beekeeping operations with more than 150 colonies experienced significantly lower losses (p ' 0.001), consistent with earlier studies. Additionally, beekeepers included in this survey who did not migrate their colonies at least once in 2018 had significantly lower losses than those migrating (p ' 0.001). The percentage of new queens from 2018 in wintered colonies was also examined as a potential risk factor. The percentage of colonies going into winter with a new queen was estimated as 55.0% over all countries. Higher percentages of young queens corresponded to lower overall losses (excluding losses from natural disaster), but also lower losses from unresolvable queen problems, and lower losses from winter mortality (p ' 0.001). Detailed results for each country and overall are given in a table, and a map shows relative risks of winter loss at regional level.
PB  - Taylor and Francis Ltd.
T2  - Journal of Apicultural Research
T1  - Honey bee colony winter loss rates for 35 countries participating in the COLOSS survey for winter 2018–2019, and the effects of a new queen on the risk of colony winter loss
VL  - 59
IS  - 5
SP  - 744
EP  - 751
DO  - 10.1080/00218839.2020.1797272
ER  - 

@article{
author = "Gray, Alison and Adjlane, Noureddine and Arab, Arab and Ballis, Alexis and Brusbardis, Valters and Charrière, Jean-Daniel and Chlebo, Robert and Coffey, Mary F. and Cornelissen, Bram and Amaro da Costa, Cristina and Dahle, Bjørn and Danihlík, Jiří and Dražić, Marica Maja and Evans, Garth and Fedoriak, Mariia and Forsythe, Ivan and Gajda, Anna and de Graaf, Dirk C. and Gregorc, Aleš and Ilieva, Iliyana and Johannesen, Jes and Kauko, Lassi and Kristiansen, Preben and Martikkala, Maritta and Martín-Hernández, Raquel and Medina-Flores, Carlos Aurelio and Mutinelli, Franco and Patalano, Solenn and Raudmets, Aivar and Martin, Gilles San and Soroker, Victoria and Stevanović, Jevrosima and Uzunov, Aleksandar and Vejsnaes, Flemming and Williams, Anthony and Zammit-Mangion, Marion and Brodschneider, Robert",
year = "2020",
abstract = "This article presents managed honey bee colony loss rates over winter 2018/19 resulting from using the standardised COLOSS questionnaire in 35 countries (31 in Europe). In total, 28,629 beekeepers supplying valid loss data wintered 738,233 colonies, and reported 29,912 (4.1%, 95% confidence interval (CI) 4.0–4.1%) colonies with unsolvable queen problems, 79,146 (10.7%, 95% CI 10.5–10.9%) dead colonies after winter and 13,895 colonies (1.9%, 95% CI 1.8–2.0%) lost through natural disaster. This gave an overall colony winter loss rate of 16.7% (95% CI 16.4–16.9%), varying greatly between countries, from 5.8% to 32.0%. We modelled the risk of loss as a dead/empty colony or from unresolvable queen problems, and found that, overall, larger beekeeping operations with more than 150 colonies experienced significantly lower losses (p ' 0.001), consistent with earlier studies. Additionally, beekeepers included in this survey who did not migrate their colonies at least once in 2018 had significantly lower losses than those migrating (p ' 0.001). The percentage of new queens from 2018 in wintered colonies was also examined as a potential risk factor. The percentage of colonies going into winter with a new queen was estimated as 55.0% over all countries. Higher percentages of young queens corresponded to lower overall losses (excluding losses from natural disaster), but also lower losses from unresolvable queen problems, and lower losses from winter mortality (p ' 0.001). Detailed results for each country and overall are given in a table, and a map shows relative risks of winter loss at regional level.",
publisher = "Taylor and Francis Ltd.",
journal = "Journal of Apicultural Research",
title = "Honey bee colony winter loss rates for 35 countries participating in the COLOSS survey for winter 2018–2019, and the effects of a new queen on the risk of colony winter loss",
volume = "59",
number = "5",
pages = "744-751",
doi = "10.1080/00218839.2020.1797272"
}

Gray, A., Adjlane, N., Arab, A., Ballis, A., Brusbardis, V., Charrière, J., Chlebo, R., Coffey, M. F., Cornelissen, B., Amaro da Costa, C., Dahle, B., Danihlík, J., Dražić, M. M., Evans, G., Fedoriak, M., Forsythe, I., Gajda, A., de Graaf, D. C., Gregorc, A., Ilieva, I., Johannesen, J., Kauko, L., Kristiansen, P., Martikkala, M., Martín-Hernández, R., Medina-Flores, C. A., Mutinelli, F., Patalano, S., Raudmets, A., Martin, G. S., Soroker, V., Stevanović, J., Uzunov, A., Vejsnaes, F., Williams, A., Zammit-Mangion, M.,& Brodschneider, R.. (2020). Honey bee colony winter loss rates for 35 countries participating in the COLOSS survey for winter 2018–2019, and the effects of a new queen on the risk of colony winter loss. in Journal of Apicultural Research
Taylor and Francis Ltd.., 59(5), 744-751.
https://doi.org/10.1080/00218839.2020.1797272

Gray A, Adjlane N, Arab A, Ballis A, Brusbardis V, Charrière J, Chlebo R, Coffey MF, Cornelissen B, Amaro da Costa C, Dahle B, Danihlík J, Dražić MM, Evans G, Fedoriak M, Forsythe I, Gajda A, de Graaf DC, Gregorc A, Ilieva I, Johannesen J, Kauko L, Kristiansen P, Martikkala M, Martín-Hernández R, Medina-Flores CA, Mutinelli F, Patalano S, Raudmets A, Martin GS, Soroker V, Stevanović J, Uzunov A, Vejsnaes F, Williams A, Zammit-Mangion M, Brodschneider R. Honey bee colony winter loss rates for 35 countries participating in the COLOSS survey for winter 2018–2019, and the effects of a new queen on the risk of colony winter loss. in Journal of Apicultural Research. 2020;59(5):744-751.
doi:10.1080/00218839.2020.1797272 .

Gray, Alison, Adjlane, Noureddine, Arab, Arab, Ballis, Alexis, Brusbardis, Valters, Charrière, Jean-Daniel, Chlebo, Robert, Coffey, Mary F., Cornelissen, Bram, Amaro da Costa, Cristina, Dahle, Bjørn, Danihlík, Jiří, Dražić, Marica Maja, Evans, Garth, Fedoriak, Mariia, Forsythe, Ivan, Gajda, Anna, de Graaf, Dirk C., Gregorc, Aleš, Ilieva, Iliyana, Johannesen, Jes, Kauko, Lassi, Kristiansen, Preben, Martikkala, Maritta, Martín-Hernández, Raquel, Medina-Flores, Carlos Aurelio, Mutinelli, Franco, Patalano, Solenn, Raudmets, Aivar, Martin, Gilles San, Soroker, Victoria, Stevanović, Jevrosima, Uzunov, Aleksandar, Vejsnaes, Flemming, Williams, Anthony, Zammit-Mangion, Marion, Brodschneider, Robert, "Honey bee colony winter loss rates for 35 countries participating in the COLOSS survey for winter 2018–2019, and the effects of a new queen on the risk of colony winter loss" in Journal of Apicultural Research, 59, no. 5 (2020):744-751,
https://doi.org/10.1080/00218839.2020.1797272 . .