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OEB Seminar Series: Marie Dacke

April 22, 2021

Free

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As the crow flies and the beetle rolls: Straight-line orientation from behavior to neurons

Abstract: The seemingly simple act of walking in a straight line involves a complex interplay of various sensory modalities, the motor system, and cognition. This is obvious to anyone who have ever found themselves lost in the desert at night, or in a forest when the sun is high in the sky. A dung beetle released in the same unchartered territory does not move in circles, but holds a chosen bearing until it encounters a suitable spot to bury its ball of dung. The key to the beetle’s success lies in their ability to detect and orient via a large repertoire of celestial compass cues, from the bright sun to the weak intensity differences of light provided by the Milky Way.

A beetle’s drive to adhere to its set course is so strong that it sticks to it regardless of the costs; over stones, through bushes and grass or in an experimental arena. However, if a beetle is forced to make a new ball, the bearing information is reset in its brain and a new course is set. This unique and robust orientation behaviour, in combination with an accessible brain, make the dung beetle an ideal model system for understanding the fundamental visual and neural processes underlying straight-line orientation.

The presentation provides an overview of recent behavioural, anatomical and physiological results concerning how an insect brain is designed to facilitate straight-line orientation.

Register here: https://harvard.zoom.us/webinar/register/WN_Xh4J3vjLQyGTlOC30jvZeA

Details

Date:
April 22
Time:
3:30 pm - 5:00 pm
Cost:
Free
Website:
https://oeb.harvard.edu/event/oeb-seminar-series-marie-dacke-0

Venue

Online

Organizer

Harvard University