First, we analyze annual USDA estimates of colony numbers at the aggregate (United States) level, as well as at the state level, to determine whether the managed honey bee population has been affected by the onset of CCD. Next, ... R. Rucker,W. Thurman 被引量: 1发表: 2011年 Five Wa...
The honey bee sex locus is homozygous‐lethal, and, all else being equal, a higher allele number in the population lead to higher mean brood survival... RS Gloag,JR Christie,G Ding,... - 《Molecular Ecology》 被引量: 0发表: 2019年 The interacting effect of the BDNF Val66Met polymorphi...
doi:10.2478/jas-2021-0023Apis melliferageostatistical krigingpopulation densityHost population density as a risk factor for infectious disease transmission is an established concept in both host-parasite ecology and epidemiological disease modeling. A 'population-at-risk' value is a necessary denominator ...
B(2021辽宁省实验中学期末)In Sweden ,McDonald 's is building “bee hotels ”on the back of its roadside billboards (广告牌)to help save the country's declining bee population. It launched the campaign together with outdoor advertising agency JCDecaux. Six large permanent wooden bee hotels fi...
These species, by eventually killing the other insects, act as biological control agents that reduce the population levels of their hosts. Such control agents have many advantages: Parasitoids are often fairly host specific, and thus their effects are focused on the pest problem; a population of ...
From cells in tissue, to bird flocks, to human crowds, living systems display a stunning variety of collective behaviors. Yet quantifying such phenomena first requires tracking a significant fraction of the group members in natural conditions, a substant
As important pollinators, bees play a critical role in maintaining the balance of the ecosystem and improving the yield and quality of crops. However, in recent years, the bee population has significantly declined due to various pathogens and environment
However, a doubling of population size resulted in a 4-day decrease in lifespan (Rueppell et al., 2009), whereas the continuous addition of young workers (resulting in less than doubling of colony size) resulted in a 5-fold greater reduction of 23.3 days. The effect of population ...
Viruses are omnipresent, yet the knowledge on drivers of viral prevalence in wild host populations is often limited. Biotic factors, such as sympatric managed host species, as well as abiotic factors, such as climatic variables, are likely to impact vira
Population decline in a ground-nesting solitary squash bee (Eucera pruinosa) following exposure to a neonicotinoid insecticide treated crop (Cucurbita pepo) D. Susan Willis Chan & Nigel E. Raine Scientific Reports volume 11, Article number: 4241 (2021) Cite this article 10k Accesses 269 Altmet...