Sentences with phrase «bumblebee colonies»

At field realistic doses, neonicotinoids cause a wide range of adverse sublethal effects in honeybee and bumblebee colonies, affecting colony performance through impairment of foraging success, brood and larval development, memory and learning, damage to the central nervous system, susceptibility to diseases, hive hygiene etc..

In stark contrast to other studies, where imidacloprid and thiamethoxam were found to be toxic to bumblebee colonies, this study raises the possibility that clothianidin may not exert the same sub-lethal effects on bumblebee learning and memory and so might not be toxic to bumblebee colonies.

University of Sussex PhD researcher Thomas Wood, supervised by bumblebee expert Professor Dave Goulson, compared farms with and without HLS schemes to measure the abundance of bumblebee colonies.

«These spring queens represent the next generation of bumblebee colonies.»

She split a bumblebee colony into three groups of workers and fed them different field - realistic doses of the neonicotinoid thiamethoxam.

Not exact matches

The study, published in the Journal of Animal Ecology, shows that tree bumblebees have rapidly spread despite them carrying high levels of an infection that normally prevents queen bees from producing colonies.

Researchers collected tree bumblebee queens from the wild, checked them for parasites and then monitored colony development in a laboratory.

The researchers examined the impacts of exposing queen bumblebees to thiamethoxam during the spring when they emerge from hibernation and are preparing to lay their first eggs and establish a colony.

Bumblebees can learn to pull strings for food and pass on the ability to a colony, according to researchers at Queen Mary University of London (QMUL).

The researchers examined the impacts of exposing the queen bumblebees to thiamethoxam in spring when they emerge from hibernation and are preparing to lay their first eggs and establish a colony.

Bumblebees are less able to start colonies when exposed to a common neonicotinoid pesticide, shows new research.

«Bumblebee queens that were exposed to the neonicotinoid were 26 per cent less likely to lay eggs to start a colony,» said Raine, holder of the Rebanks Family Chair in Pollinator Conservation.

Bumblebees are less able to start colonies when exposed to a common neonicotinoid pesticide, according to a new University of Guelph study.

«Ultimately, the results revealed that fast - learning bumblebees collected fewer resources for the colony over their foraging career,» said Raine, holder of the Rebanks Family Chair in Pollinator Conservation.

«Neonics put bumblebees at risk of extinction by hindering colony formation, study reveals: Exposure to thiamethoxam reduces the chances of a bumblebee queen starting a new colony by more than a quarter.»

In the lab, the researchers used blue and yellow artificial flowers to test the visual learning performance of 85 individual foraging bumblebees from five colonies.

Although colony collapse does not affect bumblebees, they are under much greater threat of extinction than honeybees.

They studied captive colonies of bumblebees visiting buzz - pollinated flowers, monitoring their behaviour and collecting bee buzzes using microphones.

Most bumblebees do not live in isolation, but in colonies of tens to hundreds of related individuals founded each year by a single queen bee after the winter's hibernation.

Interestingly, exposing young Swiss bumblebees from mature colonies to various bacteria showed generally elevated responses of immune genes in females compared with males.

This is also important as previous evidence indicates that different neonicotinoids may exert opposing effects on bumblebee queen production and sex ratios of colonies.

Other studies have suggested that low doses of neonicotinoids can keep colonies of bumblebees from growing well.

More on Bees, Pollinators and Colony Collapse Disorder Some Bumblebee Populations See 96 % Decline Colony Collapse Disorder and the Epic Fight to Save the Bees Ellen Page Speaks Out About the Vanishing of the Bees The Vanishing of the Bees Documents the Ongoing Decline of the Honeybee

That is because bumblebees may not receive as much attention as bees, while they seem to be doing at least equally bad in today's ecologically stressed world, threatened by Colony Collapse Disorder and other factors that result from agricultural intensification and habitat degradation.

Given the pressing urgency of Colony Collapse Disorder, and the staggering decline in some bumblebee and butterfly populations, it has been a delight to watch (and hear) the bees, wasps, butterflies and dragon flies that have descended on our yard.