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Neonicotinoids disrupt circadian rhythms and sleep in honey bees
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Neonicotinoids disrupt circadian rhythms and sleep in honey bees
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Journal Article
Neonicotinoids disrupt circadian rhythms and sleep in honey bees
2020
Overview
Honey bees are critical pollinators in ecosystems and agriculture, but their numbers have significantly declined. Declines in pollinator populations are thought to be due to multiple factors including habitat loss, climate change, increased vulnerability to disease and parasites, and pesticide use. Neonicotinoid pesticides are agonists of insect nicotinic cholinergic receptors, and sub-lethal exposures are linked to reduced honey bee hive survival. Honey bees are highly dependent on circadian clocks to regulate critical behaviors, such as foraging orientation and navigation, time-memory for food sources, sleep, and learning/memory processes. Because circadian clock neurons in insects receive light input through cholinergic signaling we tested for effects of neonicotinoids on honey bee circadian rhythms and sleep. Neonicotinoid ingestion by feeding over several days results in neonicotinoid accumulation in the bee brain, disrupts circadian rhythmicity in many individual bees, shifts the timing of behavioral circadian rhythms in bees that remain rhythmic, and impairs sleep. Neonicotinoids and light input act synergistically to disrupt bee circadian behavior, and neonicotinoids directly stimulate wake-promoting clock neurons in the fruit fly brain. Neonicotinoids disrupt honey bee circadian rhythms and sleep, likely by aberrant stimulation of clock neurons, to potentially impair honey bee navigation, time-memory, and social communication.
Publisher
Nature Publishing Group UK,Nature Publishing Group
Subject
/ 631/443
/ Animals
/ Bees
/ Behavior, Animal - drug effects
/ Circadian Rhythm - drug effects
/ Honey
/ Humanities and Social Sciences
/ Insecticides - adverse effects
/ Insects
/ Neonicotinoids - adverse effects
/ Neurons
/ Nicotinic Agonists - adverse effects
/ Pesticides - adverse effects
/ Science
/ Sleep
