Male cognitive performance declines in the absence of sexual selection

Enforced monogamy for over 100 generations resulted in limited cognition in male fruit flies.

Sexual selection is responsible for the evolution of male ornaments and armaments, but its role in the evolution of cognition—the ability to process, retain and use information—is largely unexplored. Because successful courtship is likely to involve processing information in complex, competitive sexual environments, we hypothesized that sexual selection contributes to the evolution and maintenance of cognitive abilities in males. To test this, we removed mate choice and mate competition from experimental populations of Drosophila melanogaster by enforcing monogamy for over 100 generations. Males evolved under monogamy became less proficient than polygamous control males at relatively complex cognitive tasks. [emphasis mine]

image source

Too bad the researchers couldn't even imagine fruit fly "free love" for a control group. Flies aren't smart enough for polyamory, which requires negotiation.

Views: 87

Replies to This Discussion

The full article is behind a paywall -- arrgh!

Still, "remov[ing] mate choice and mate competition" (presumably by just pairing up males and females) isn't the same as only "enforcing monogamy" (which would require watching all the fruit flies 24/7, letting them choose mates on their own, then immediately isolating each pair so they're stuck with each other).

In polyamory (which, as you said, requires higher-level cognition!), partner choice can be an active concern over more of one's life, but it can be for different roles and types of relationships at different times. Significantly, a poly person looking for a committed "primary" partner knows that that person won't be "Everything" to them.



Update Your Membership :




Nexus on Social Media:


Latest Activity

Thomas Murray commented on Daniel W's group Godless in the garden
1 hour ago
Chris commented on Ruth Anthony-Gardner's group Hang With Friends
1 hour ago
BenGee replied to jlaz's discussion Can rights to digital media be passed along to one's heirs?
2 hours ago
BenGee commented on BenGee's blog post Is gravity weaker than magnetism (or electromagnetism)
2 hours ago
Loren Miller posted a status
"SpaceX has pulled off yet another successful launch of a Dragon spacecraft and recovery of the first-stage of the Falcon 9. BRAVO!"
3 hours ago
jlaz replied to jlaz's discussion Can rights to digital media be passed along to one's heirs?
3 hours ago
Chris replied to Loren Miller's discussion The Playboy Interview: Richard Dawkins in the group Hang With Friends
3 hours ago
Loren Miller commented on Daniel W's group Quotation Of The Day
4 hours ago

© 2017   Atheist Nexus. All rights reserved. Admin: Richard Haynes.   Powered by

Badges  |  Report an Issue  |  Terms of Service