Thursday, February 18, 2016

Mate choice learning in D. melanogaster

Posted by Anna Nordén, on behalf of Katrine Lund-Hansen

Since I haven’t seen a fly in weeks, I thought it would be nice to read about one instead. This paper from former EXEB member, Machteld Verzijden, explores the importance of visual cues in mate choice learning in male D. melanogaster. These are novel findings in D. melanogaster and interesting results for mate choice learning.

And I’ll bring fika!

Link to the paper is here

When: Tuesday, February 23th, 10 am
Where: Argumentet

Title: Male Drosophila melanogaster learn to prefer an arbitrary trait associated with female mating status

Abstract: Although males are generally less discriminating than females when it comes to choosing a mate, they still benefit from distinguishing between mates that are receptive to courtship and those that are not, in order to avoid wasting time and energy. It is known that males of Drosophila melanogaster are able to learn to associate olfactory and gustatory cues with female receptivity, but the role of more arbitrary, visual cues in mate choice learning has been overlooked to date in this species. We therefore carried out a series of experiments to determine: 1) whether males had a baseline preference for female eye color (red versus brown), 2) if males could learn to associate an eye color cue with female receptivity, and 3) whether this association disappeared when the males were unable to use this visual cue in the dark. We found that naive males had no baseline preference for females of either eye color, but that males which were trained with sexually receptive females of a given eye color showed a preference for that color during a standard binary choice experiment. The learned cue was indeed likely to be truly visual, since the preference disappeared when the binary choice phase of the experiment was carried out in darkness. This is, to our knowledge 1) the first evidence that male D. melanogaster can use more arbitrary cues and 2) the first evidence that males use visual cues during mate choice learning. Our findings suggest that that D. melanogaster has untapped potential as a model system for mate choice learning.

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