iiinova — where your digital self keeps evolving

Reposted by Brian Lerch

Will Ratcliff @wcratcliff.bsky.social · 19/03/2025

1/35 New paper out! @jamesTstroud and I dive into why long-term studies are crucial for understanding evolution. They reveal processes impossible to detect in short timescales and capture rare events that transform our understanding of evolutionary dynamics. www.nature.com/articles/s41...

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Brian Lerch @lerchecoevo.bsky.social · 25/02/2025

We suggest the greenbeard effect is unlikely drive the evolution of altruism. Examples of the greenbeard effect are likely to be in pleiotropic genes in microbes or in cases where something “special” prevents the breakup of LD. And a greenbeard trait may be present without having caused altruism.

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Brian Lerch @lerchecoevo.bsky.social · 25/02/2025

We also find that when altruism is favored via spatial structure (i.e., “classic” kin selection), then signaling and discrimination can also evolve and be in positive linkage disequilibrium (LD), even though the greenbeard effect did not cause the evolution of altruism…

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Brian Lerch @lerchecoevo.bsky.social · 25/02/2025

We formally demonstrate the importance of various forms of pleiotropy in favoring the evolution of altruism by the greenbeard effect. In particular, pleiotropy between altruistic behavior and a signaling trait is necessary to substantially favor altruism via the greenbeard effect…

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Brian Lerch @lerchecoevo.bsky.social · 25/02/2025

First viewed as a theoretical oddity, recent empirical examples and models could leave one with the impression that the greenbeard effect is an underappreciated phenomenon. But models often make “extra” assumptions about pleiotropy and spatial structure that may lead to interpretation challenges…

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Brian Lerch @lerchecoevo.bsky.social · 25/02/2025

The greenbeard effect, first proposed by Hamilton and then elaborated by Dawkins, suggests that a gene that simultaneously 1) leads to altruistic behavior, 2) provides a signal, and 3) discriminates to only cooperate with others sharing the signal can lead to the stable evolution of altruism…

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Reposted by Brian Lerch

Kevin Zollman @kevinzollman.com · 19/02/2025

We showed that an unusual equilibrium, originally found in models of signaling in economics, is evolutionarily important. You can have communication that is "partially honest" where people *sometimes* lie and where they are *sometimes* believed. This is called the hybrid equilibrium.

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Reposted by Brian Lerch

Amboseli Baboon Research Project @amboselibaboonrp.bsky.social · 14/01/2025

Another baboon project joint lab meeting has ended! Thanks, everyone, for another great meeting!

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