Andy Gardner
@andygardner.bsky.social
940 followers 710 following 21 posts
Evolution | Theory | Social Evolution | Population Genetics | Behavioural Ecology | Kin Selection | Multilevel Selection | Inclusive Fitness | Sex Ratio | Altruism | Professor of Biology at University of St Andrews, Scotland.
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Reposted by Andy Gardner
andygardner.bsky.social
Join us for Part 2 of the "Advances" symposium today, from 11am in Room 129+130. #ESEB2025
andygardner.bsky.social
And Chedhawat Chokechaipaisarn, whose poster "The consequences of constrained sex allocation under local mate competition" (P02.036) is in Tuesday's session.

This is based on his recent paper in Journal of Evolutionary Biology:

doi.org/10.1093/jeb/...

@jevbio.bsky.social @eseb2025.bsky.social
Photo of Chedhawat Chokechaipaisarn
andygardner.bsky.social
Two other members of the research group have successfully made it to @eseb2025.bsky.social ahead of me.

Look out for @kztwyman.bsky.social, whose poster "A formal theory of group-level adaptation for obligate eusociality" (P01.068) is in this evening's session.
Photo of Kalyani Twyman.
andygardner.bsky.social
Finally on my way to #ESEB2025, a day late, following flight cancellation...

Disappointed to miss 1st day of talks, but happy that S03.01 "Advances in technology..." is in @ju-morimoto.bsky.social's safe hands.

Starting 10.30am, Meeting Room 129+130, with invited talk by @kokkonut.bsky.social.
Programme for Part I of the Symposium "Advances in technology, mathematical and statistical models and their application in evolutionary ecology: the dawn of a new era", including talks by Hanna Kokko, Szymon Drobniak, Aurelien Tellier, Yuxin Ning and Md Ruhul Armin.
andygardner.bsky.social
New paper: "The consequences of constrained sex allocation in diploids and haplodiploids under local mate competition", with Chedhawat Chokechaipaisarn:

doi.org/10.1093/jeb/...

@jevbio.bsky.social
Figure 1. Unbeatable sex allocation strategy of unconstrained females (r*) as a function of proportion of constrained females (p) under local mate competition with two foundresses colonising the patch. Shown are the result for Godfray’s (1990) erroneous diploidy solution (dashed grey line), our corrected diploidy solution (solid grey line), and our haplodiploidy solution (solid black line). Overlaid are results from individual-based simulations (discs).
Reposted by Andy Gardner
Reposted by Andy Gardner
ajmongue.bsky.social
It's finally out! This paper took quite a while but I'm so excited to share now! For anyone who studies sex chromosomes, take note: we found a rare "slower X"! (dN/dS_X < dN/dS_Autos) 👀
andygardner.bsky.social
New paper: “The clonality window: relatedness and the group covariance effect in the evolution of division of labour”, with @kztwyman.bsky.social #OpenAccess

doi.org/10.1093/evol...

@journal-evo.bsky.social #Image: #ChatGPT #Evolution #OA
AI-generated image using the paper's title and abstract as input.
Reposted by Andy Gardner
royalsocietypublishing.org
Sex-ratio optima for haplodiploid parents converge in viscous populations when dispersal is density-dependent. Read 'Density-dependent dispersal reduces conflict over the sex ratio': royalsocietypublishing.org/doi/10.1098/... #BiologyLetters #evolution
andygardner.bsky.social
New paper: "Kin-discriminating partner choice promotes the evolution of helping"

with Tom Scott (@tomwscott.bsky.social) & Geoff Wild (@geoffwild.bsky.social) #OpenAccess

doi.org/10.1093/evol...

@journal-evo.bsky.social #Image: #ChatGPT #Evolution #OA
andygardner.bsky.social
New paper: "Kin competition drives the evolution of earlier metamorphosis", with @bingdongevo.bsky.social.

doi.org/10.1002/ece3...
Reposted by Andy Gardner
kztwyman.bsky.social
Hello - how nice to be off twitter!
I'm a PhD student at the University of St Andrews studying evolutionary theory (my research profile: tinyurl.com/kztwyman).
Would love to connect with anyone working in evolution, theory, social behaviour etc.!
Reposted by Andy Gardner
salazarafra.bsky.social
Join us for our satellite event on selfish genetic elements!
andygardner.bsky.social
Chedhawat (Tim) has given an online seminar about this sex-ratio work, here:

cassyni.com/events/K7vsZ...
A slide from Tim's talk, featuring a schematic showing how haplodiploid inheritance works, with mothers contributing genes to sons and daughters, and fathers contributing genes only to daughters.
andygardner.bsky.social
New paper: "Density-dependent dispersal reduces conflict over the sex ratio" (OpenAccess), w/ Chedhawat Chokechaipaisarn.

doi.org/10.1098/rsbl...

Sex-ratio optima for haplodiploid parents converge in viscous populations when dispersal is density-dependent.
A portion of the title page of the paper. The Abstract reads:

Haplodiploids—in particular, wasps—are the workhorses of sex-allocation research. This is owing to their unusual system of sex determination, which provides a ready means of sex ratio adjustment. Notably, their sexually asymmetrical mode of genetic inheritance leads mothers and fathers to come into conflict over the sex ratio of their offspring. In the simplest outbreeding scenario, a mother is favoured to employ an even sex ratio while a father prefers that all his mate’s offspring are female. An important modulator of evolutionary conflict between mating partners is genetic relatedness, raising the possibility that this sex ratio conflict is reduced in low-dispersal settings with mating occurring between relatives. However, the impact of population viscosity on sex ratio conflict in haplodiploids remains unknown. Here, we develop and analyse a kin-selection model to investigate how the rate of dispersal modulates sex ratio conflict in a haplodiploid, viscous population setting. We find that population viscosity is associated with a reduction in the extent of sex ratio conflict—the effect being very weak under density-independent dispersal and much stronger under density-dependent dispersal.
Reposted by Andy Gardner
andygardner.bsky.social
One of my undergraduate students, Callum Ferrando, has just published a comic in Journal of Evolutionary Biology. You can find "Taylor's famous result" here:

doi.org/10.1093/jeb/...

@jevbio.bsky.social @uniofstandrews.bsky.social
andygardner.bsky.social
One of my undergraduate students, Callum Ferrando, has just published a comic in Journal of Evolutionary Biology. You can find "Taylor's famous result" here:

doi.org/10.1093/jeb/...

@jevbio.bsky.social @uniofstandrews.bsky.social
andygardner.bsky.social
New paper: "Kin selection as a modulator of human handedness: sex-specific, parental & parent-of-origin effects" (#OpenAccess), with Bing Dong & Silvia Paracchini (@silparacchini.bsky.social):

doi.org/10.1017/ehs....

#OA #Image commons.wikimedia.org/wiki/File:Cu...
Rock art at Cueva de las Manos, Santa Cruz Province. From Wikipedia: "Cueva de las Manos (Spanish for Cave of the Hands or Cave of Hands) is a cave and complex of rock art sites in the province of Santa Cruz, Argentina, 163 km (101 mi) south of the town of Perito Moreno. It is named for the hundreds of paintings of hands stenciled, in multiple collages, on the rock walls."
andygardner.bsky.social
New paper: "Transmission of social status drives cooperation and offspring philopatry", with Antonio Rodrigues (Open Access)

doi.org/10.1098/rspb...
andygardner.bsky.social
New paper: "Sexual antagonism in sequential hermaphrodites", w/ Thomas Hitchcock (@imprintedgene.bsky.social) *Open Access*

doi.org/10.1098/rspb...

Image: commons.wikimedia.org/wiki/File:Am...
Image of clown anemonefish.