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Rudy Riesch

@evolecollab

Associate Professor at Royal Holloway; research interests include speciation, phenotypic plasticity, sexual selection, livebearing fishes, invasive species, extreme environments, pollution

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08.05.2025
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Latest posts by Rudy Riesch @evolecollab

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New in JFB: Alfaro huberi must have one of the strangest mating behaviors among poeciliid fishes. #TeamFish #FishSci

Paper: onlinelibrary.wiley.com/doi/10.1111/...
Corresponding video: www.youtube.com/watch?v=cKWA...

19.02.2026 15:54 πŸ‘ 24 πŸ” 8 πŸ’¬ 3 πŸ“Œ 3
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Oil Things Bright and Beautiful? How Hydrocarbon Pollution Impacts Guppy Ornamentation Spatial variation in crude oil pollution in Trinidad leads to differing levels of pollutant exposure in connected guppy populations. Male guppy ornamentation is an important sexually selected trait a...

I am excited to share that @hannahmcgx.bsky.social's first PhD chapter (with @amydeacon.bsky.social and Francesco Santi) on how oil pollution influences male guppy ornamentation just got published in @ecol-evol.bsky.social
@rhulbiology.bsky.social
onlinelibrary.wiley.com/doi/10.1002/...

20.02.2026 08:28 πŸ‘ 4 πŸ” 4 πŸ’¬ 0 πŸ“Œ 0
This is a graphical abstract, showing that male nuptial color changes with increasing pollution. Guppies in more polluted waters develop more intense white ornaments and increase the number and body area covered by violet color ornaments.

This is a graphical abstract, showing that male nuptial color changes with increasing pollution. Guppies in more polluted waters develop more intense white ornaments and increase the number and body area covered by violet color ornaments.

Excited to share our new paper, led by Brazilian collaborators, on male coloration of guppies in response to urban pollution:
www.sciencedirect.com/science/arti... @rhulbiology.bsky.social

18.12.2025 09:12 πŸ‘ 5 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

Congratulations indeed to @rsmehlhausenfranks.bsky.social on passing his viva yesterday with minor corrections! Fascinating work on flocking dynamics in pigeons.

20.11.2025 06:25 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Big congratulations @rsmehlhausenfranks.bsky.social on passing your viva today with minor corrections. It’s been a pleasure supervising you. Thank you to the examiners @rjpheathcote.bsky.social and @markjfbrown.bsky.social! And thank you Paul Devlin and @evolecollab.bsky.social for your help too!

19.11.2025 21:18 πŸ‘ 14 πŸ” 2 πŸ’¬ 1 πŸ“Œ 1

It was a fun day indeed and great to hear what everyone is working on or thinking about :)

08.11.2025 12:58 πŸ‘ 5 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Such an amazing honour for an amazing person and colleague!

30.10.2025 08:43 πŸ‘ 5 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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πŸ“£ Excited to advertise a new @treesdla.bsky.social CASE PhD project exploring the effects of forest diversity on soil fauna with ecoacoustics. Supervised by me, @evolecollab.bsky.social and Carlos Abrahams @soilacoustics.bsky.social. Apply by December 17th! 🌳🌲🐜🎧🎀 www.trees-dla.ac.uk/projects/nov...

25.10.2025 08:00 πŸ‘ 8 πŸ” 5 πŸ’¬ 0 πŸ“Œ 0
An invasive mosquitofish in a habitat in southern Italy

An invasive mosquitofish in a habitat in southern Italy

Applications for PhD Studentships with @treesdla.bsky.social
now open for 2026 intake. @kratina.bsky.social and I offer a PhD project on trophic ecology of invasive mosquitofish in Italy, France, and Spain (www.trees-dla.ac.uk/projects/tro...). Please get in touch if you are interested.

22.10.2025 07:11 πŸ‘ 4 πŸ” 1 πŸ’¬ 2 πŸ“Œ 1
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Congratulations to Dr Walter Lucchesi and Dr Becky Thomas (@beckythomas.bsky.social) who have been awarded Senior Fellowship of @advancehe.bsky.social (formerly the Higher Education Academy). This reflects their leadership in education both within and beyond @rhulbiology.bsky.social πŸŽ‰πŸ‘

17.10.2025 09:34 πŸ‘ 7 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0

Thank you, Audrey, glad you liked it and animal sounds are fascinating indeed :)

10.10.2025 13:36 πŸ‘ 1 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0
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One of @rhulbiology.bsky.social UG students, Alice, attended @britishecologicalsociety.org summer school this year and shared these lovely phots. She befriended many like-minded ecologists, networked with people from different environmental sectors, and studied a wide range of topics & organisms

25.09.2025 07:53 πŸ‘ 4 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
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First of the two @rhulbiology.bsky.social presentations at today's @ceevol.bsky.social Autumn Symposium is by @hannahmcgx.bsky.social who presents her PhD work on effects of oil pollution on guppy colouration

19.09.2025 11:49 πŸ‘ 3 πŸ” 2 πŸ’¬ 0 πŸ“Œ 1
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Our 3rd year students are having great time at Borneo fieldcourse expedition setting camera traps, doing behavioural observations and participating in tree planting for the Regrow Borneo project

18.09.2025 08:47 πŸ‘ 2 πŸ” 1 πŸ’¬ 1 πŸ“Œ 0
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#alevelresultsday | Izzy Frey Now that the dust of the much-anticipated (and often dreaded) #ALevelResultsDay this week has begun to settle, having heard mentions of it all over the news, radio and TV, it has me sat here on a Sund...

Great post from our alumna Izzy Frey reflecting on her own journey from receiving unexpected #ALevelResults to her current job as an ecologist at Tetra Tech and why studying biology @royalholloway.bsky.social ended up the best decision she ever made
www.linkedin.com/feed/update/...

21.08.2025 09:55 πŸ‘ 4 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
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Antarctic leopard seal β€˜songs’ are surprisingly similar to nursery rhymes The fact that animals don’t use words makes it hard to decode their communication. But technology is starting to make it easier.

I recently wrote about a cool new paper by another research group on Antarctic leopard seal communication for The Conversation; it was fun to focus on some #bioacoustics again for a change. πŸ˜ƒ theconversation.com/antarctic-le...

20.08.2025 12:43 πŸ‘ 6 πŸ” 1 πŸ’¬ 1 πŸ“Œ 0
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Congrats to Danny Hodgson on successful PhD viva today! On the left is Danny with her supervisors after viva and on the right Danny is shown working at home during COVID lockdown in a specially constructed desktop clean room to prevent sample contamination. Incredible resilience and determination!

22.05.2025 13:21 πŸ‘ 4 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
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@evolecollab.bsky.social lab cleaned up at the RHUL biology PGR symposium 🐟πŸ’ͺ best MSc talk (Ella) + runner up (Rebecca) and best PhD poster (yours truly)😎

13.05.2025 20:00 πŸ‘ 5 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
This photograph captures Sir David Attenborough seated outdoors on the rugged terrain of Skomer Island. Behind him, the ocean and coastal cliffs form a scenic backdrop under a clear sky. Sir David, dressed in a khaki jacket and light trousers, looks towards the camera with a gentle expression, exuding a sense of warmth, calm, and wisdom. Around him, puffins can be seen flying and perched on the rocky ground, illuminated in rays of golden sunlight as the sun sets behind the cliffs.

This photograph captures Sir David Attenborough seated outdoors on the rugged terrain of Skomer Island. Behind him, the ocean and coastal cliffs form a scenic backdrop under a clear sky. Sir David, dressed in a khaki jacket and light trousers, looks towards the camera with a gentle expression, exuding a sense of warmth, calm, and wisdom. Around him, puffins can be seen flying and perched on the rocky ground, illuminated in rays of golden sunlight as the sun sets behind the cliffs.

Happy 99th birthday to the man who gave voice to the wild. πŸŽ‰

Sir David Attenborough, thank you for a lifetime dedicated to the natural world, and for sharing its story with wisdom, wonder, and grace.

You've inspired generations to fall in love with nature.

08.05.2025 07:09 πŸ‘ 43186 πŸ” 7969 πŸ’¬ 652 πŸ“Œ 478