scholarly journals Circadian plasticity in honey bees

2020 ◽  
Vol 42 (2) ◽  
pp. 22-26 ◽  
Author(s):  
Katharina Beer ◽  
Guy Bloch
Keyword(s):  
Circadian Rhythms ◽  
Social Organization ◽  
Honey Bees ◽  
Current Understanding ◽  
Sun Compass ◽  
Dance Communication ◽  
Support Time ◽  
Compass Navigation

Circadian rhythms of about a day are ubiquitous in animals and considered functionally significant. Honey bees show remarkable circadian plasticity that is related to the complex social organization of their societies. Forager bees show robust circadian rhythms that support time-compensated sun-compass navigation, dance communication and timing visits to flowers. Nest-dwelling nurse bees care for the young brood around the clock. Here, we review our current understanding of the molecular and neuroanatomical mechanisms underlying this remarkable natural plasticity in circadian rhythms.

scholarly journals Microarray Analysis of Natural Socially Regulated Plasticity in Circadian Rhythms of Honey Bees

2012 ◽  
Vol 27 (1) ◽  
pp. 12-24 ◽  
Author(s):  
Sandra L. Rodriguez-Zas ◽  
Bruce R. Southey ◽  
Yair Shemesh ◽  
Elad B. Rubin ◽  
Mira Cohen ◽  
...  
Keyword(s):  
Circadian Rhythms ◽  
Microarray Analysis ◽  
Honey Bees

scholarly journals Neonicotinoids disrupt circadian rhythms and sleep in honey bees

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Michael C. Tackenberg ◽  
Manuel A. Giannoni-Guzmán ◽  
Erik Sanchez-Perez ◽  
Caleb A. Doll ◽  
José L. Agosto-Rivera ◽  
...  
Keyword(s):  
Circadian Rhythms ◽  
Honey Bee ◽  
Honey Bees ◽  
Fruit Fly ◽  
Food Sources ◽  
Nicotinic Cholinergic Receptors ◽  
Cholinergic Signaling ◽  
Neonicotinoid Pesticides ◽  
Circadian Behavior ◽  
Light Input

Abstract 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.

Anatomical basis of sun compass navigation II: The neuronal composition of the central complex of the monarch butterfly

2012 ◽  
Vol 521 (2) ◽  
pp. 267-298 ◽  
Author(s):  
Stanley Heinze ◽  
Jeremy Florman ◽  
Surainder Asokaraj ◽  
Basil el Jundi ◽  
Steven M. Reppert
Keyword(s):  
Monarch Butterfly ◽  
Central Complex ◽  
Sun Compass ◽  
Anatomical Basis ◽  
Compass Navigation

scholarly journals The Role of Colony Temperature in the Entrainment of Circadian Rhythms of Honey Bee Foragers

2020 ◽  
Author(s):  
Manuel A. Giannoni-Guzmán ◽  
Emmanuel Rivera ◽  
Janpierre Aleman-Rios ◽  
Alexander M. Melendez Moreno ◽  
Melina Perez Ramos ◽  
...  
Keyword(s):  
Circadian Rhythms ◽  
Honey Bee ◽  
Honey Bees ◽  
Temperature Oscillation ◽  
Time Of Day ◽  
Temperature Cycle ◽  
Large Individual ◽  
Endogenous Rhythms ◽  
Honey Bee Foragers

AbstractHoney bees utilize their circadian rhythms to accurately predict the time of day. This ability allows foragers to remember the specific timing of food availability and its location for several days. Previous studies have provided strong evidence toward light/dark cycles being the primary Zeitgeber for honey bees. Recent work in our laboratory described large individual variation in the endogenous period length of honey bee foragers from the same colony and differences in the endogenous rhythms under different constant temperatures. In this study, we further this work by examining temperature inside the honey bee colony. By placing temperature and light data loggers at different locations inside the colony we uncovered that temperature oscillates with a 24-hour period at the periphery of the colony. We then simulated this temperature oscillation in the laboratory and found that using the temperature cycle as a Zeitgeber, foragers present large individual differences in the phase of locomotor rhythms with respect to temperature. Moreover, foragers successfully entrain to these simulated temperature cycles and advancing the cycle by six hours, resulted in changes in the phase of locomotor activity for the most foragers in the assay. The results shown in this study highlight the importance of temperature as a potential Zeitgeber in the field. Future studies will examine the possible functional and evolutionary role of the observed phase differences of circadian rhythms.

Dominance of Celestial Cues over Landmarks Disproves Map-Like Orientation in Honey Bees

1990 ◽  
Vol 45 (6) ◽  
pp. 723-726 ◽  
Author(s):  
Randolf Menzel ◽  
Lars Chittka ◽  
Stefan Eichmüller ◽  
Karl Geiger ◽  
Dagmar Peitsch ◽  
...  
Keyword(s):  
Honey Bees ◽  
Recent Model ◽  
The Sun ◽  
Sun Compass ◽  
Landmark Orientation ◽  
Mental Map ◽  
Mental Operations

Abstract A recent model of landmark orientation by the bee assumes that the memory of the landmarks is arranged in a kind of a mental map. Our experiments disprove this assumption and show that the sun compass dominates the orientation without any indication of mental operations within a map-like representation of landmarks or of compass vectors and distances.

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