Home sick: impacts of migratory beekeeping on honey bee ( Apis mellifera ) pests, pathogens, and colony size

PeerJ

article

Samantha A. Alger¹  P. Alexander Burnham¹  Zachary S. Lamas²  Alison K. Brody¹  Leif L. Richardson³ 

[1] Department of Biology, University of Vermont;Department of Entomology, University of Maryland, College Park;Rubenstein School of Environment and Natural Resources, University of Vermont;Gund Institute for Environment, University of Vermont

关键词: Beekeeping;    Honey bee;    Pathogen;    Disease;    Migratory;    Pollination;    Agriculture;    Migratory beekeeping;    Apis mellifera;   

DOI  :  10.7717/peerj.5812

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

Honey bees are important pollinators of agricultural crops and the dramatic losses of honey bee colonies have risen to a level of international concern. Potential contributors to such losses include pesticide exposure, lack of floral resources and parasites and pathogens. The damaging effects of all of these may be exacerbated by apicultural practices. To meet the pollination demand of US crops, bees are transported to areas of high pollination demand throughout the year. Compared to stationary colonies, risk of parasitism and infectious disease may be greater for migratory bees than those that remain in a single location, although this has not been experimentally established. Here, we conducted a manipulative experiment to test whether viral pathogen and parasite loads increase as a result of colonies being transported for pollination of a major US crop, California almonds. We also tested if they subsequently transmit those diseases to stationary colonies upon return to their home apiaries. Colonies started with equivalent numbers of bees, however migratory colonies returned with fewer bees compared to stationary colonies and this difference remained one month later. Migratory colonies returned with higher black queen cell virus loads than stationary colonies, but loads were similar between groups one month later. Colonies exposed to migratory bees experienced a greater increase of deformed wing virus prevalence and load compared to the isolated group. The three groups had similar infestations of Varroa mites upon return of the migratory colonies. However, one month later, mite loads in migratory colonies were significantly lower compared to the other groups, possibly because of lower number of host bees. Our study demonstrates that migratory pollination practices has varying health effects for honey bee colonies. Further research is necessary to clarify how migratory pollination practices influence the disease dynamics of honey bee diseases we describe here.

【 授权许可】

CC BY