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Henry Slesser

@hslesser.bsky.social
412 followers 94 following 7 posts

Molecular ecologist at the British Antarctic Survey, looking at population structure and foraging of Humpback Whales in the Southwestern Atlantic. Lover of all things nature, photography, drones, travel and baseball. All views my own.

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Henry Slesser @hslesser.bsky.social · 15/08/2026
New Paper out! 🐋 What can whale blubber tell us about their reproduction? We combine DNA, hormones and century-old historical records to investigate sex ratio, pregnancy status and male reproductive condition in humpback whales foraging in the southwestern Atlantic (doi.org/10.1111/mms....
doi.org
Sex Ratio, Pregnancy Status, and Blubber Testosterone Concentrations of Humpback Whales (<fc><fi>Megaptera novaeangliae</fi></fc>) on Foraging Grounds in the Southwestern Atlantic
Click on the article title to read more.
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Henry Slesser @hslesser.bsky.social · 01/07/2026
Always know a fun day in the lab is upcoming when you get to break the warning stickers out! Starting work on getting the d13C/d15N isotopes from humpback whale skin from our latest field season in South Georgia, excited to see what they show us! 🐋 #isotopes #labwork #whales
A beaker with toxic, hazardous if ingested and flammable warning stickers attached to the side.
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Henry Slesser @hslesser.bsky.social · 25/03/2026
Visiting the Royal Opera tonight for Rigoletto, the biologist in me couldn’t help but appreciate the level of detail in these stunning animal masks the props department made for Alcina in 2022! Personal favourites include the Mandrill, Bat and Chameleon 🦇
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St Catharine's College @stcatharines.bsky.social · 26/10/2025
A Catz student is having a whale of a time! @hslesser.bsky.social (Molecular Ecology PhD student): 🐋 Studied humpback #whales in the wild with @bas.ac.uk ⚾ Came 4th nationally with @cam.ac.uk #baseball team 💐 Got married! Read our interview: caths.cam.ac.uk/hump... @cam-archaeology.bsky.social
caths.cam.ac.uk
Humpbacks and home runs: Life as a PhD student at Catz
A St Catharine’s postgraduate student has been alternating biology and baseball during his four years at Cambridge. Henry Slesser (a Molecular Ecology PhD student) was interested in both marine biology and baseball when he joined St Catharine’s as a PhD student in 2022. He has since been involved in important research with humpback whales and an impressive series of wins with the Cambridge University Baseball Squad.
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Dr Simon Goodman @phoca-sapiens.bsky.social · 23/11/2024
New PhD studentship opportunity in my lab & with collaborators from the Pinniped Genomes Consortium. Come help us unravel the genomics of seal physiological super powers! Closing date 6th January 2025 🧪🦭🧬🌍🦑🐳 #marine #mammals #consgen #popgen #phylo #molevol #evolution yes-dtn.ac.uk/research/the...
yes-dtn.ac.uk
The evolutionary genomics of life-history adaptations in pinnipeds - Yorkshire Environmental Sciences • Doctoral Training Network
Project summary Pinnipeds (seals, sea lions, fur seals and walrus) are keystone marine predators, and sentinels for marine ecosystem health. Advances in genomics technologies are opening up the possib...
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Woods Hole Oceanographic Institution @whoi.edu · 12/12/2024
The first North Atlantic #rightwhale calves of the season have been spotted off Georgia by Clearwater Marine Aquarium! Cheers to whale moms Nauset + Minus One! 📲 Keep track of these #criticallyendangered newborns w/ @newenglandaquarium.bsky.social: go.whoi.edu/neaq-calves... 📸 NOAA permit 26919
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Dr. Daniel M Moore @danielmmoore.bsky.social · 11/12/2024
Could this be the longest recorded Humpback #Whale migration ever recorded? A male whale has been resighted off #Tanzania in 2019 after first being seen off #Colombia in 2013. Read the study here: royalsocietypublishing.org/doi/10.1098/... #Cetaceans #ClimateChange #Ocean
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Henry Slesser @hslesser.bsky.social · 10/12/2024
Getting into the Christmas spirit with a visit to @oldvictheatre.bsky.social to see a Christmas Carol in the round. A brilliant performance by John Simm as Scrooge, and Dickens’ message of charity and consideration for others ringing as true today as when it was written.
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William (Bill) Sutherland @billsutherland.bsky.social · 09/12/2024
Delighted that our Horizon Scan 2025 paper listing 15 future issues is now published online here and is available open access. Many thanks to Pew and the RSPB for funding. eur03.safelinks.protection.outlook.com?url=https%3A...
doi.org
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Stu Bearhop @stubearhop.bsky.social · 29/11/2024
PhD Opportunity!! Come work with us (University of Exeter, RSPB & BTO) Diagnosing population decline in insectivorous birds. Inkd.in/eG58dQxs Contact me for more details (s.bearhop@exeter.ac.uk). Please Share @britishbirds.bsky.social @ibisjournal.bsky.social @btobirds.bsky.social @rspb.bsky.social
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Ketan Joshi @ketanjoshi.co · 05/12/2024
Noise pollution from Norway's oil and gas exploration is threatening whales --> www.theguardian.com/environment/...
theguardian.com
‘It’s nonstop’: how noise pollution threatens the return of Norway’s whales
Recordings by biologist Heike Vester reveal how oil and gas exploration as well as cruises, fishing boats and even whale-watchers are adding to the din underwater
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Henry Slesser @hslesser.bsky.social · 04/12/2024
Happy isotope day! I shall be celebrating through the joyous activity of weighing samples out. (Prepping for a sulphur run on some whale collagen samples and prey 🐋 🦐)
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Jen Jackson @polarbiome.bsky.social · 03/12/2024
The #Falkland Isl are a high-use, critical habitat for southern right #whales! 🐳 Our new paper w Falklands Conservation studies local #whale habitat use & long-range movements @bas.ac.uk @hslesser.bsky.social #MarMam Ten whales were satellite tagged in July 2022 1/3 www.int-res.com/articles/esr...
Map of the Falkland Islands, southwest Atlantic, showing key coastal sites in the north, and a red box in the northeast showing where the satellite tags were deployed on southern right whales in July 2022.Southern right whale swimming in coastal Falkland Islands waters. Image: Falklands Conservation
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Darren Croft @darrencroft.bsky.social · 29/11/2024
Exciting new NERC funded PhD opportunity available with us on #killerwhale #orca #behaviour and #conservation, co-supervised by Stephanie King, Sam Ellis and Dan Franks in partnership with The Center for Whale Research USA exeter.ac.uk/study/fundin... - deadline 13th January 2025 #killerwhale
Post reproductive mother and Son copyright David Ellifrit Center for Whale Research
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Henry Slesser @hslesser.bsky.social · 28/11/2024
Awesome paper, and a great example of how to pivot when things don’t entirely go how you expect! 🐟
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Dr. Iain Staniland @iainstaniland.bsky.social · 20/11/2024
The IWC has just published its Status of Whales webpages. This represents a huge amount of work by the amazing group of people in our SC. Simple graphics to show whether populations are moving towards extinction or recovery, how this status has changed over a 20-year period. iwc.int/resources/me...
A picture of a webpage detailing the current status of whale stocks. The image shows a dashboard with dials that indicate the relative abundance of the whale population and its trend over the last 20 years.
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