nickdulvy.bsky.social
Nick Dulvy
@nickdulvy.bsky.social
4.5K followers 2.7K following 190 posts
I lift the lid on the oceans & census the life hidden beneath by combining Darwin’s toolbox–of natural history field guides, thermometer, microscope, and dissection kit–with big-data approaches @earth2ocean.bsky.social
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nickdulvy.bsky.social
Nick Dulvy @nickdulvy.bsky.social · Dec 5
New #GlobalSharkTrends study published in @science.org reveals #overfishing has more than halved shark & ray populations over the past 50-years causing widespread erosion of ecological function and exceptionally high extinction risk
👉Full article bit.ly/GlobalSharkTrends
🧵1/20
Scalloped hammerhead sharks (Sphyrna lewini) IUCN Critically Endangered © Masayuki Agawa_Ocean Image Bank
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nickdulvy.bsky.social
Nick Dulvy @nickdulvy.bsky.social · Dec 5
We developed a national RLI and found ecology is important. Countries with healthier Shark & Ray populations (larger RLI), have:
👉 greater shelf area (more habitat)
👉 cooler sea surface temperature
👉 greater primary production
This is consistent with greater extinction risk in the tropics
🧵16/20
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nickdulvy.bsky.social
Nick Dulvy @nickdulvy.bsky.social · Dec 5
Bright spots with some science-based fisheries management measure benefiting sharks & rays:
1. USA & Canada
2. NE Atlantic
3. S. Africa
4. Australia & New Zealand
#OceanOptimism
@nancyknowlton.bsky.social
@joshuacinner.bsky.social
www.science.org/doi/epdf/10....
🧵15/20
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nickdulvy.bsky.social
Nick Dulvy @nickdulvy.bsky.social · Dec 5
Researchers highlight troubling dark spots where shark & ray biodiversity is plummeting.
1. Japan–Taiwan
2. Indonesia to New Guinea
3. India & Bay of Bengal
4. Western Indian Ocean
5. SW Atlantic
6. Galapagos & SE Pacific
7. Gulf of California
🧵14/20
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infopointa.bsky.social
Infopoint #Klimawandel #Artensterben @infopointa.bsky.social · Aug 3
"Overfishing the largest species in nearshore and pelagic habitats risks loss of ecomorphotypes and a 5 to 22% erosion of functional diversity."

Ecological erosion and expanding extinction risk of sharks and rays
Dulvy @nickdulvy.bsky.social et al 2024
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helenyan.bsky.social
Helen Yan @helenyan.bsky.social · Aug 22
🚨New PhD paper out today in @natcomms.nature.com with @renatoamorais.bsky.social and Dave Bellwood! 🚨

Marine fishes exhibit extraordinary patterns of diversity, but how does this diversity relate to their productivity? 🐟🐠🐡

🌐
🦑🧪

🔗 nature.com/articles/s41...
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seaprinceaaron.bsky.social
Aaron B. Judah🔱 @seaprinceaaron.bsky.social · Sep 4
First first-author paper just got accepted!!!! New deep-sea shark, ray, and chimaera science inbound 👻🦈
Shark National Geographic GIF
ALT: Shark National Geographic GIF
media.tenor.com
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whysharksmatter.bsky.social
David Shiffman, Ph.D. 🦈 @whysharksmatter.bsky.social · 25d
Today is “drag and tag,” tagging sharks with drag queens while raising money for LGBQT+ youth organizations in Florida!

www.scientificamerican.com/article/drag...
Drag Queens Tag Sharks in Annual Florida Science Celebration
The annual “Drag ’n Tag” expedition takes place amid a wave of antitransgender legislation
www.scientificamerican.com
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sharkcolin.bsky.social
Colin Simpfendorfer @sharkcolin.bsky.social · 6d
New #sharkscience out in @currentbiology.bsky.social by @seaprinceaaron.bsky.social and colleagues.
Deep-sea mining risks for sharks, rays, and chimeras. A must read for this looming threat to many already threatened species.
www.cell.com/current-biol...
@iucnshark.bsky.social
Deep-sea mining risks for sharks, rays, and chimeras
Judah et al. identify 30 species of chondrichthyans that overlap with proposed deep-sea mining activities, nearly two-thirds of which are already threatened with extinction. Precautionary management o...
www.cell.com
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currentbiology.bsky.social
Current Biology @currentbiology.bsky.social · 6d
And for more on #shark #conservation, check out this well-aged review from @sharkcolin.bsky.social and colleagues

www.cell.com/current-biol...
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katieocean.bsky.social
Katie Matthews, PhD @katieocean.bsky.social · 6d
🧪🌏🦑🌊🦈 New paper alert #deepseamining #sharks
sharkcolin.bsky.social
Colin Simpfendorfer @sharkcolin.bsky.social · 6d
New #sharkscience out in @currentbiology.bsky.social by @seaprinceaaron.bsky.social and colleagues.
Deep-sea mining risks for sharks, rays, and chimeras. A must read for this looming threat to many already threatened species.
www.cell.com/current-biol...
@iucnshark.bsky.social
Deep-sea mining risks for sharks, rays, and chimeras
Judah et al. identify 30 species of chondrichthyans that overlap with proposed deep-sea mining activities, nearly two-thirds of which are already threatened with extinction. Precautionary management o...
www.cell.com
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Reposted by Nick Dulvy
seaprinceaaron.bsky.social
Aaron B. Judah🔱 @seaprinceaaron.bsky.social · 6d
#deepseamining #polymetallicnodules #conservation #marineconservation #marinebiodiversity #mantaray #whaleshark #ghostshark #whiteshark #cookiecuttershark #chocolateskate #baskingshark #megamouthshark #sharkconservation #marinebiology #mining #ocean #deepsea #chimaera #marinelife #sharkscience
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seaprinceaaron.bsky.social
Aaron B. Judah🔱 @seaprinceaaron.bsky.social · 6d
Great to team up with @cgmull.bsky.social @nickdulvy.bsky.social @britfinucci.bsky.social, Victoria and Jeff, to bring sharks, rays, and chimaeras to the larger discourse on deep-sea mining. This paper is also my first first-author publication and I am excited it could be this one!
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seaprinceaaron.bsky.social
Aaron B. Judah🔱 @seaprinceaaron.bsky.social · 6d
🚨 NEW PUBLICATION 🚨

Today in @currentbiology.bsky.social, we found that 30 species of #sharks, #rays, and #chimaeras overlap with proposed #deepseamining in Areas Beyond National Jurisdiction #ABNJ - over 60% are already #threatened with #extinction 🦈

📸 Blue Planet Archive / Masa Ushioda
The Pygmy Shark (Euprotomicrus bispinatus), the world’s second smallest shark species and one of the species with a high overlap with proposed deep sea mining. Credit: Blue Planet Archive / Masa Ushioda.
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cgmull.bsky.social
Chris Mull @cgmull.bsky.social · 6d
Depending on the mining type there are varying degrees of depth overlap between impacts and species depth ranges. We highlight four recommendations including limiting discharge plumes to below 2,000 meters to limit overlap with sharks and rays.
@seaprinceaaron.bsky.social @nickdulvy.bsky.social
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cgmull.bsky.social
Chris Mull @cgmull.bsky.social · 6d
New paper led by @seaprinceaaron.bsky.social in @currentbiology.bsky.social looking at the threats deep sea mining poses for sharks, rays, and chimaeras. We found 30 species are threatened via various pathways including collector impact and plumes at depth and pelagic discharge plumes.
Figure 1: highlighting various pathways through which mining can impact sharks, rays, and chimaeras including collector impact and plumes, and discharge plumes. Figure 2: The diversity of sharks, rays, and chimaeras impacted by deep sea mining operations. Nearly 2/3 of these species are already at an elevated risk of extinction.
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ubcoceans.bsky.social
UBC Oceans @ubcoceans.bsky.social · 27d
A World Trade Organization ( @wto.org ) agreement to end harmful #fisheries #subsidies, originally signed by WTO member nations in 2022, is set to enter into force after the requisite number of countries have now ratified the deal. www.seafoodsource.com/news/supply-...
2022 WTO deal on ending harmful fisheries subsidies set to come into force
A 2022 World Trade Organization agreement to end harmful fisheries subsidies is set to enter into force.
www.seafoodsource.com
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noiweala.bsky.social
Ngozi Okonjo-Iweala @noiweala.bsky.social · Aug 6
Sri Lanka has deposited its instrument of ratification for the Fisheries Subsidies Agreement, the 107th member to do so. Congratulations to the Sri Lankan Government, and to H.E Amb Wijesekara and his team.
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jorisphilip.bsky.social
Joris Philip @jorisphilip.bsky.social · Jul 10
NoWPaS 2025 connection
#FSBI2025
peterbetts.bsky.social
Peter Betts @peterbetts.bsky.social · Jul 10
It was brilliant to catch up with so many people from #NoWPaS2025 at #FSBI2025
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domino-joyce.ecoevo.social.ap.brid.gy
Domino Joyce @domino-joyce.ecoevo.social.ap.brid.gy · Jul 10
Reviewer 3 #fsbi2025
Grumpy man on a wine bottle
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otolithgirl.bsky.social
Dr Anna Sturrock @otolithgirl.bsky.social · Jul 11
Absolutely brilliant #FSBI2025 banquet. I'm so grateful to Sarah and her team for organising such an amazing meeting, and to our past and current presidents & ian winfield for their incredible stewardship of this v special society...And all the young 'uns for bringing their fresh ideas/dance moves!
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jamesmacarthur.bsky.social
jamesmacarthur.bsky.social @jamesmacarthur.bsky.social · Jul 11
A #FSBI2025 icon!
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estidiaz.bsky.social
Estibaliz Díaz @estidiaz.bsky.social · Jul 11
Yesterday I presented #DIASPARA at the FSBI/IFM Symposium in Belfast #FSBI2025 🐟🌍 @thefsbi.bsky.social
We are strengthening the scientific basis for managing eel and salmon by analysing life-history traits, developing FAIR databases, and improving stock assessment models.
shorturl.at/tsy53
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aquaben.bsky.social
Ben Parker @aquaben.bsky.social · Jul 9
Did you know @thefsbi.bsky.social fund up to 2 PhD studentships each year?

These include:
🐟 4 years of PhD funding.
🦈 A stipend higher than UKRI (on average).
🐠 Annual research budget of £3500.
🎣 +other benefits.

See fsbi.org.uk/phd-students... for full details or grab Melanie or me at #FSBI2025
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peterbetts.bsky.social
Peter Betts @peterbetts.bsky.social · Jul 9
Had a great time getting to #FSBI2025 with @otolithgirl.bsky.social and Lucy Smith using a range of #FSBIGreenTravel methods
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catiefish.bsky.social
catiefish.bsky.social @catiefish.bsky.social · Jul 9
Very proud of my MRes student who presented our results to the #FSBI2025 on coral reef fish communities from North West Madagascar
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