Jørgen Søraker

Jørgen Søraker

@jorgensoraker.bsky.social

DPhil student at the Edward Grey Institute, University of Oxford

112 followers122 following40 posts

Jørgen Søraker reposted

Heavier great tit nestlings 🐥 usually end up as heavier adults 🐦. Is this always a strong correlation? Our new preprint shows that the strength of this 'silver-spoon' association shifts continuously with environmental context, and is stronger in harsh conditions! www.biorxiv.org/content/10.6...

Jørgen Søraker reposted

New paper in @animalecology.bsky.social led by @davididiaquez.bsky.social published today. We document a reduction of ~5% in body mass of adult great tits at Wytham (>1 sd!) over ~45 years and show best explained by natal environment carry-over besjournals.onlinelibrary.wiley.com/doi/10.1111/...

besjournals.onlinelibrary.wiley.combesjournals.onlinelibrary.wiley.com

Jørgen Søraker reposted

Excited to share this joint first-author paper with @andreaestandia.bsky.social, now out in @royalsocietypublishing.org! We combined translocations, common garden experiments and genomic analyses to test for local adaptation to individual tree phenology in winter moths 🌳🐛 doi.org/10.1098/rspb...

royalsocietypublishing.orgNo evidence of fine-scale local adaptation of winter moths to variable tree phenology | Proceedings B | The Royal Society

New paper out in Biological Reviews📝🚨 When trying to explain why female birds engage in extra-pair copulations/paternity, we mostly focus on the benefits. But what about the costs? Should we not consider the downsides of the behavior we try to understand? 🧵 onlinelibrary.wiley.com/doi/10.1002/...

onlinelibrary.wiley.comThe costs of extra‐pair behaviours in birdsExtra-pair behaviours – reproductive behaviours, including those related to copulation and paternity of offspring, amongst animals outside of a social pair bond – have long intrigued behavioural ecol...
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Females can experience loss of parental care (although this is still poorly understood!), STDs, harassment, divorce etc. However, there are also costs for males, including reduced paternity, search costs, STDs and mate guarding.

New paper out in Biological Reviews📝🚨 When trying to explain why female birds engage in extra-pair copulations/paternity, we mostly focus on the benefits. But what about the costs? Should we not consider the downsides of the behavior we try to understand? 🧵 onlinelibrary.wiley.com/doi/10.1002/...

onlinelibrary.wiley.comThe costs of extra‐pair behaviours in birdsExtra-pair behaviours – reproductive behaviours, including those related to copulation and paternity of offspring, amongst animals outside of a social pair bond – have long intrigued behavioural ecol...

Jørgen Søraker reposted

Planning a nestbox temperature manipulation experiment in birds? We’ve just published a preprint that may be useful! 🪺🪶 We review 46 studies and also share our own blue tit pilot experiment from Wytham Woods, highlighting some very real practical challenges doi.org/10.32942/X25387

Jørgen Søraker reposted

Very pleased to welcome Dr Alexandra Cones (LMU Munich) for an EGI seminar in @biology.ox.ac.uk at 4pm this Friday 17 April. Alexandra will speak on "Embracing Complexity: Untangling sources of phenotypic variation across scales using birds" - also live-streamed: joining details below: ⬇️

Remember the EGI seminar later today! Last one of this term!

Edward Grey Institute@egioxford.bsky.social

This week's EGI seminar (last this term 😢) will be given by Dr Jennifer Morinay from @sheffielduni.bsky.social on the factors affecting helping decisions in the Long-tailed Tit - the UK's only cooperatively breeding bird. Seminar in @biology.ox.ac.uk LT1 on Fri 27 Mar at 3.30. All welcome details ⬇️

Jørgen Søraker reposted

🚨🚨 Breaking news from Wytham Woods: The 80th year of data collection of the long-term tit study officially started today with this nest with 3 Blue Tit eggs (pic: @mcmahok.bsky.social). First egg inferred 23 March which is our earliest EVER nest - beating the previous record of 26 March by 3 days!🚨🚨

Jørgen Søraker reposted

The last of what’s been an outstanding term’s @egioxford.bsky.social seminars this Friday. All planned and organised by DPhil students & postdocs. Many available on our YouTube channel www.youtube.com/@EGIOxford

youtube.comEGI Oxford
Edward Grey Institute@egioxford.bsky.social

This week's EGI seminar (last this term 😢) will be given by Dr Jennifer Morinay from @sheffielduni.bsky.social on the factors affecting helping decisions in the Long-tailed Tit - the UK's only cooperatively breeding bird. Seminar in @biology.ox.ac.uk LT1 on Fri 27 Mar at 3.30. All welcome details ⬇️

Jørgen Søraker reposted

Such a good EGI seminar from Innes Cuthill today on the ‘survivability onion’ - wide-ranging talk on defensive camouflage in birds, insects and more. One of those seminars that appeals across the department

Can you spot the bird in the picture? Really looking forward to the EGI seminar tomorrow that will be given by Prof Innes Cuthill on defensive coloration! Also streamed, so contact us if you want to tune in! Details below⬇️

Jørgen Søraker reposted

My second DPhil paper is out! A nice example of how continuous long-term monitoring of natural populations can be so valuable for understanding impacts of climate change on wild animals 🪶 📍Wytham Woods, Oxfordshire 🌳🪺

Edward Grey Institute@egioxford.bsky.social

New paper out! Great tits face distinct challenges from extreme weather during development, based on 60 years data from >83k nestlings in Wytham Woods 🐣 Cold snaps & heavy rain can stunt growth, but earlier breeding may help buffer this! By @devisatarkar.bsky.social et al. doi.org/10.1111/gcb.70794

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Also, we found that the correlation in selection for laying date and clutch size for great tits and blue tits were highly correlated, both when using number of fledglings and number of recruits as fitness components. This suggests that they share (at least correlated) drivers of selection!

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We found that selection varies mostly temporally and in a spatio-temporal interaction. Only a small proportion of the variation in selection was due to consistent differences among the subpopulations, suggesting that these subpopulations experience mostly similar selection regimes.

Jørgen Søraker reposted

This week's seminar will be given by Dr Paul Acker from NTNU, Norway on "Processes of life-history adaptation to spatio-seasonal environmental changes" - seminar at 3.30 on Friday in Life & Mind Building @biology.ox.ac.uk All welcome & will also be streamed - see details below

Jørgen Søraker reposted

Looking forward to an excellent series of seminars for the forthcoming term - programme now full till late March & will share programme very soon when we have a few last details. All seminars will be at 3.30 on Fridays in the Life & Mind Building (and usually streamed live)

Jørgen Søraker reposted

This week's seminar - last of this term - is our annual Christmas Seminar. We're welcoming Prof Tim Birkhead back to where he studied as a DPhil student ~50 years ago (can you can spot him in this 1978 photo?) Tim will be talking about "Sperm to Egg: Making a Biologist" - 3pm LT1 in the LaMB

Jørgen Søraker reposted

NEW PAPER: Introduced house sparrows showed more numerous, larger, and more variable DNA-methylation changes after simulated infection than native birds, suggesting distinct epigenetic responses that may aid introduction success. ➡️ vist.ly/4eq4a #ornithology #birds #plasticity #stress 🪶

Jørgen Søraker reposted

Just a reminder of today’s @egioxford.bsky.social seminar - all welcome

Edward Grey Institute@egioxford.bsky.social

This week’s seminar will be given by Prof Daniel Field of @zoologymuseum.bsky.social & @cambridge-earthsci.bsky.social on the origins of modern birds. 3.30pm Friday 28 Nov in LT1 in the Life & Mind Building @biology.ox.ac.uk - all welcome & see below for live streaming joining information

Remember this talk tomorrow! Contact us for link

Edward Grey Institute@egioxford.bsky.social

This week's EGI seminar is being given by Dr Maria Moiron @mmoiron.bsky.social of the University of Bielefeld at 3.30pm on Friday 21 Nov in LT1 in the Life & Mind Building @biology.ox.ac.uk. See below for online joining details - all welcome!