Ryo Yamaguchi
@r-yamaguchi.bsky.social
Assistant Prof. at Hokkaido University | evolution, ecology, speciation, mathematical model | https://www.ryamaguchilab.com/en
Golden ginkgo trees at Hokkaido University 🍂
November 5, 2025 at 2:52 AM
Golden ginkgo trees at Hokkaido University 🍂
New review out! With students in my lab, we explore how population size shapes speciation—from drift in small populations to selection in large ones. Do small or large populations speciate faster? The answer is more nuanced than you might think.
esj-journals.onlinelibrary.wiley.com/doi/full/10....
esj-journals.onlinelibrary.wiley.com/doi/full/10....
Speciation Through the Lens of Population Dynamics: A Theoretical Primer on How Small and Large Populations Diverge
Population size and dynamics fundamentally shape speciation by influencing genetic drift, founder events, and adaptive potential. Small populations may speciate rapidly due to stronger drift, whereas...
esj-journals.onlinelibrary.wiley.com
October 14, 2025 at 11:25 PM
New review out! With students in my lab, we explore how population size shapes speciation—from drift in small populations to selection in large ones. Do small or large populations speciate faster? The answer is more nuanced than you might think.
esj-journals.onlinelibrary.wiley.com/doi/full/10....
esj-journals.onlinelibrary.wiley.com/doi/full/10....
Question for speciation researchers!
I'm looking for "the most classic mathematical models of speciation" to introduce in my class. What comes to mind when you hear this phrase?
Would love to hear what you consider the classical models in the field. I'll start first:
I'm looking for "the most classic mathematical models of speciation" to introduce in my class. What comes to mind when you hear this phrase?
Would love to hear what you consider the classical models in the field. I'll start first:
September 26, 2025 at 1:08 AM
Question for speciation researchers!
I'm looking for "the most classic mathematical models of speciation" to introduce in my class. What comes to mind when you hear this phrase?
Would love to hear what you consider the classical models in the field. I'll start first:
I'm looking for "the most classic mathematical models of speciation" to introduce in my class. What comes to mind when you hear this phrase?
Would love to hear what you consider the classical models in the field. I'll start first:
Morning walk: a forest waterfall and Chrysolina aino (Japanese flightless leaf beetle) on a leaf. Cool autumn weather in Hokkaido.
September 22, 2025 at 1:04 AM
Morning walk: a forest waterfall and Chrysolina aino (Japanese flightless leaf beetle) on a leaf. Cool autumn weather in Hokkaido.
New review out in @cp-trendsecolevo.bsky.social - 'The genomics of discrete polymorphisms maintained by disruptive selection' doi.org/10.1016/j.tr...
Redirecting
doi.org
September 5, 2025 at 12:15 AM
New review out in @cp-trendsecolevo.bsky.social - 'The genomics of discrete polymorphisms maintained by disruptive selection' doi.org/10.1016/j.tr...
Rainy Sunday. Black-banded Hairstreak (Antigius attilia) — Hokkaido, Japan
August 17, 2025 at 6:29 AM
Rainy Sunday. Black-banded Hairstreak (Antigius attilia) — Hokkaido, Japan
Wagimo signatus resting on understory foliage — Hokkaido, Japan #butterfly
August 1, 2025 at 12:00 PM
Wagimo signatus resting on understory foliage — Hokkaido, Japan #butterfly
Reposted by Ryo Yamaguchi
🚨 The New Age of global bird phylogenies continues!
Hot on the heels of the fantastic updated tree created by @eliotmiller.bsky.social and others, we use a different approach to generate a near-comprehensive timetree of >9000 bird species. 1/3
www.cell.com/current-biol...
🧪🌐🪶
Hot on the heels of the fantastic updated tree created by @eliotmiller.bsky.social and others, we use a different approach to generate a near-comprehensive timetree of >9000 bird species. 1/3
www.cell.com/current-biol...
🧪🌐🪶
A new time tree of birds reveals the interplay between dispersal, geographic range size, and diversification
Flight may affect the dispersal and evolution of birds. Using a new evolutionary tree,
Claramunt et al. find that efficient fliers have broader geographic ranges, and speciation
reduces range size, bu...
www.cell.com
July 30, 2025 at 3:43 PM
🚨 The New Age of global bird phylogenies continues!
Hot on the heels of the fantastic updated tree created by @eliotmiller.bsky.social and others, we use a different approach to generate a near-comprehensive timetree of >9000 bird species. 1/3
www.cell.com/current-biol...
🧪🌐🪶
Hot on the heels of the fantastic updated tree created by @eliotmiller.bsky.social and others, we use a different approach to generate a near-comprehensive timetree of >9000 bird species. 1/3
www.cell.com/current-biol...
🧪🌐🪶
Exciting news! Our lab student Hidaka Kubo's (@hidakakubo.bsky.social ) first research paper has been published in the Journal of Theoretical Biology!
www.sciencedirect.com/science/arti...
www.sciencedirect.com/science/arti...
Modeling alternative strategies of male emergence timing
In many butterfly species, males emerge earlier than females as part of a strategy to maximize male reproductive success. Although behavioral ecologic…
www.sciencedirect.com
July 24, 2025 at 9:45 PM
Exciting news! Our lab student Hidaka Kubo's (@hidakakubo.bsky.social ) first research paper has been published in the Journal of Theoretical Biology!
www.sciencedirect.com/science/arti...
www.sciencedirect.com/science/arti...
Papilio maackii (Alpine Black Swallowtail) after rainfall
July 18, 2025 at 1:42 PM
Papilio maackii (Alpine Black Swallowtail) after rainfall
Reposted by Ryo Yamaguchi
Started a Theoretical Ecology starter pack. For from complete. Respond if you want to be added or removed.
go.bsky.app/PwpvZLb
go.bsky.app/PwpvZLb
December 27, 2024 at 12:30 AM
Started a Theoretical Ecology starter pack. For from complete. Respond if you want to be added or removed.
go.bsky.app/PwpvZLb
go.bsky.app/PwpvZLb
Reposted by Ryo Yamaguchi
I made a starter pack of speciation researchers. Please let me know if you or someone you know would like to be added. I am particularly sad that so far there are not many speciation researchers from the Global South represented.
go.bsky.app/J7qDY56
go.bsky.app/J7qDY56
December 7, 2024 at 4:40 PM
I made a starter pack of speciation researchers. Please let me know if you or someone you know would like to be added. I am particularly sad that so far there are not many speciation researchers from the Global South represented.
go.bsky.app/J7qDY56
go.bsky.app/J7qDY56