Flexible memory controls sperm competition responses in male Drosophila melanogaster

Proceedings. Biological Sciences
J RouseAmanda Bretman

Abstract

Males of many species use social cues to predict sperm competition (SC) and tailor their reproductive strategies, such as ejaculate or behavioural investment, accordingly. While these plastic strategies are widespread, the underlying mechanisms remain largely unknown. Plastic behaviour requires individuals to learn and memorize cues associated with environmental change before using this experience to modify behaviour. Drosophila melanogaster respond to an increase in SC threat by extending mating duration after exposure to a rival male. This behaviour shows lag times between environmental change and behavioural response suggestive of acquisition and loss of memory. Considering olfaction is important for a male's ability to assess the SC environment, we hypothesized that an olfactory learning and memory pathway may play a key role in controlling this plastic behaviour. We assessed the role of genes and brain structures known to be involved in learning and memory. We show that SC responses depend on anaesthesia-sensitive memory, specifically the genes rut and amn We also show that the γ lobes of the mushroom bodies are integral to the control of plastic mating behaviour. These results reveal the genetic and neural properties requ...Continue Reading

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Citations

Sep 17, 2020·Proceedings. Biological Sciences·James RouseAmanda Bretman
Aug 28, 2020·Evolution; International Journal of Organic Evolution·Alice A DoreTracey Chapman
Aug 14, 2018·Behavioral Ecology and Sociobiology·Alice A DoreTracey Chapman
Apr 10, 2019·Proceedings. Biological Sciences·Samuel J LymberyLeigh W Simmons
Jul 2, 2020·Ecology and Evolution·Alice A DoreTracey Chapman
Jan 27, 2019·Ecology and Evolution·Lucas Marie-OrleachMichael G Ritchie

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