Results 21 to 30 of about 4,606 (197)

Einstein–Bumblebee-dilaton black hole solution

open access: yesEuropean Physical Journal C: Particles and Fields, 2023
We obtain new black hole solutions in a Einstein–Bumblebee-scalar theory. By starting with a Einstein–Bumblebee theory in ( $$D+d$$ D + d ) dimensions, the scalar dilaton field and its interaction with the gravitational and Bumblebee fields are obtained ...
L. A. Lessa, J. E. G. Silva
doaj   +1 more source

Level of Genetic Diversity in European Bumblebees is Not Determined by Local Species Abundance

open access: yesFrontiers in Genetics, 2019
Bumblebee species with declining population trends tend to show lower genetic diversity levels than stable species. The observed difference might be explained by abundance differences, with declining bumblebee species having lower genetic diversity ...
Kevin Maebe   +4 more
doaj   +1 more source

Bumblebees [PDF]

open access: yes, 2010
Since bumblebees are a group associated with cool climates, Britain supports a large proportion (~10%) of the world's bumblebee fauna. However, three of our 25 species have become extinct, and seven species are Biodiversity Action Plan (BAP) listed, a higher proportion than for any other insect group.
openaire   +1 more source

The bumblebee Bombus terrestris carries a primary inoculum of Tomato brown rugose fruit virus contributing to disease spread in tomatoes.

open access: yesPLoS ONE, 2019
The bumblebee Bombus terrestris is a beneficial pollinator extensively used in tomato production. Our hypothesis was that bumblebee hives collected from a Tomato brown rugose fruit virus (ToBRFV) infected tomato greenhouse, preserve an infectious primary
Naama Levitzky   +9 more
doaj   +1 more source

Walking bumblebees see faster

open access: yesProceedings of the Royal Society B: Biological Sciences, 2023
The behavioural state of animals has profound effects on neuronal information processing. Locomotion changes the response properties of visual interneurons in the insect brain, but it is still unknown if it also alters the response properties of photoreceptors. Photoreceptor responses become faster at higher temperatures.
Lisa Rother   +6 more
openaire   +3 more sources

The potential of electricity transmission corridors in forested areas as bumblebee habitat [PDF]

open access: yesRoyal Society Open Science, 2016
Declines in pollinator abundance and diversity are not only a conservation issue, but also a threat to crop pollination. Maintained infrastructure corridors, such as those containing electricity transmission lines, are potentially important wild ...
Bruce Hill, Ignasi Bartomeus
doaj   +1 more source

Parasites of the genus Nosema, Crithidia and Lotmaria in the honeybee and bumblebee populations: a case study in India

open access: yesВавиловский журнал генетики и селекции, 2018
The populations of honeybees and bumblebees have been decreasing around the world in the recent decades. A variety of pathogens and parasites, including  bacteria, fungi, protozoa, nematodes, mites and insects play signi ficant role in honeybee and ...
V. Y. Vavilova   +4 more
doaj   +1 more source

Mating Stimulates the Immune Response and Sperm Storage-Related Genes Expression in Spermathecae of Bumblebee (Bombus terrestris) Queen

open access: yesFrontiers in Genetics, 2021
Bumblebee queens have remarkable spermathecae that store sperm for year-round reproduction. The spermathecal gland is regarded as a secretory organ that could benefit sperm storage.
Yueqin Guo   +7 more
doaj   +1 more source

Exact modifications on a vacuum spacetime due to a gradient bumblebee field at its vacuum expectation value

open access: yesEuropean Physical Journal C: Particles and Fields, 2022
This work belongs to the context of the standard-model extension, in which a Lorentz symmetry violation is induced by a bumblebee field as it acquires a nonzero vacuum expectation value.
F. P. Poulis, M. A. C. Soares
doaj   +1 more source

From Paths to Routes: A Method for Path Classification

open access: yesFrontiers in Behavioral Neuroscience, 2021
Many animals establish, learn and optimize routes between locations to commute efficiently. One step in understanding route following is defining measures of similarities between the paths taken by the animals.
Andrea Gonsek   +3 more
doaj   +1 more source

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