Mark de Boer
markdeboer.bsky.social
Mark de Boer
@markdeboer.bsky.social
Curator Rotterdam Zoo, working on North Sea conservation and rehab of stranded sea turtles in NE Atlantic.
EAZA Chair Elasmobranch Taxon Advisery Group and Sea Turtle Working Group
EEP Coordinator Testudo kleinmanni, Dipturus batis & intermedius
Reposted by Mark de Boer
Mooi verhaal over de vijfde steuruitzet gister, een project van lange adem waar we al in 2010 met WWF Nederland aan begonnen www.nrc.nl/nieuws/2025/...
De steur is net zo zeldzaam als de reuzenpanda of de Siberische tijger, maar er zwemmen er weer negentig rond
Steur: Wel vijf meter lang, driehonderd kilogram zwaar en soms honderd jaar oud: de steur is een majestueuze vis. Je ziet ze amper meer. Daarom worden ze actief uitgezet, in de hoop dat ze ooit terugk...
www.nrc.nl
September 15, 2025 at 3:30 PM
Reposted by Mark de Boer
Boeier's Journey: While we've been busy with nesting sea turtles Boeier been busy too, so here's an update for Boeier (Diergaarde Blijdorp / Rotterdam Zoo).

Our last report we reported that Boeier moved from just off the beach across from San Antonio Bay, just south of Surfside/Freeport.
June 3, 2025 at 2:27 PM
Reposted by Mark de Boer
Yesterday, we released more green sea turtle patients from our recent cold stun events with our partners at the Houston Zoo! We also were able to release a loggerhead sea turtle that we have been caring for since October.

We are grateful for the TAMUG Corps of Cadets who came in to help us remove
March 7, 2025 at 2:06 AM
With a little help from your friends... Thanks to the Port of Rotterdam for supporting the Dutch sturgeon project!

@portofrotterdam.bsky.social @diergaardeblijdorp.bsky.social
March 5, 2025 at 3:55 PM
Proud of the new research article we published! An in situ & ex situ research performed on Antillian iguanas at Rotterdam Zoo and St Eustatius

#zoo #conservation #iguana #eDNA #insitu #exsitu #research @diergaardeblijdorp.bsky.social

rdcu.be/d6mw5
Safeguarding Iguana diversity: enabling rapid and low-effort tracking of non-native iguanas through terrestrial eDNA innovations
rdcu.be
January 15, 2025 at 5:53 PM
4 November, I had the pleasure of releasing Boeier, the Kemps Ridley, in the Gulf of Mexico after it had been caught in the Dutch North Sea a year earlier and rehabilitated at Rotterdam Zoo.
Boeier's Journey: Another week and Boeier (Diergaarde Blijdorp / Rotterdam Zoo/Houston Zoo) seems to have found her spot in Mexico, at least for now. She is currently still meandering just off the Laguna Madre and coast near Los Americanos, Tamaulipas, MX.
December 30, 2024 at 7:38 PM
Follow the journey of our Kemps Ridley Boeier in the Gulf of Mexico. Boeier was found in a fisherman's net in the Dutch North Sea, oct 2023 and released Nov 2024 at Galveston Beach, Tx
Boeier's Journey: A week after Boeier (Diergaarde Blijdorp / Rotterdam Zoo/Houston Zoo) swam into Mexico, she has slowed down but is still heading south. She is currently meandering just off the Laguna Madre and coast near Los Americanos, Tamaulipas, MX.
December 24, 2024 at 2:31 PM
First loggerhead of the season, stranded yesterday at Hoek van Holland, The Netherlands
diergaardeblijdorp.nl/nl/media/dik...
Dikkop binnengebracht
Waar het tot op heden voornamelijk Denemarken was waar dit jaar schildpadden aanspoelden, was het gisteren de beurt aan Hoek van Holland. Daar spoelde een onderkoelde dikkopschildpad aan. Het diertje ...
diergaardeblijdorp.nl
December 23, 2024 at 7:11 PM
My overview of stranded cold-stunned sea turtles 2023-2024 in the Netherlands in the RAVON Magazine. Article in Dutch, summary in English. www.naturetoday.com/intl/nl/natu...
Nature Today | Groot aantal strandingen van zeeschildpadden aan de Nederlandse kust
In januari 2024 werd een recordaantal van vijftien aangespoelde zeeschildpadden gemeld, een uitzonderlijke stijging ten opzichte van voorgaande jaren. In het nieuwste RAVON-tijdschrift wordt dit opval...
www.naturetoday.com
December 17, 2024 at 10:26 PM
Reposted by Mark de Boer
European winter walkers keep 👀 out. A dead Kemp's Ridley turtle was reported on 13th December at Talacre, North Wales, UK. There will be more. Reporting guidelines here: www.ukturtles.online/Graphics%20a...
🐢🌍🧪🦑 🦤 #seaturte #marineturtle
@whysharksmatter.bsky.social @exetermarine.bsky.social
December 17, 2024 at 8:45 AM
Reposted by Mark de Boer
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
December 5, 2024 at 10:05 PM
Interesting article on Heterodontus eggs!
Morphology of the unique egg cases of hornsharks (Heterodontiformes: Heterodontidae)
buff.ly
December 5, 2024 at 9:33 PM
No significant difference found between tagged and untagged growth rates and body condition. Also no damage found to the carapace from the tag attachment. #seaturtle #tagging #transmitter

besjournals.onlinelibrary.wiley.com/doi/10.1111/...
Assessing the impacts of satellite tagging on growth rates of immature hawksbill turtles
Animal-borne devices including transmitters, data loggers and identification tags are widely used across taxa to address important biological and ecological questions. Some of these devices may af...
besjournals.onlinelibrary.wiley.com
December 4, 2024 at 7:24 AM
The story of our Kemps Ridley #seaturtle. Found in the North Sea and rehabilitated in our facility at Rotterdam #Zoo. Released 4 weeks ago into the Gulf. #conservation #rehabilitation #aquarium #northsea

wildlife.org/kemps-ridley...
Kemp’s ridley sea turtle makes transatlantic journey - The Wildlife Society
A stranded Kemp’s ridley sea turtle found in Europe was returned to the Gulf of Mexico in November
wildlife.org
November 30, 2024 at 6:03 PM
Niels Breve received his PhD at Wageningen University today for his research on the reintroduction of the sturgeon in the Dutch Delta. Together with several partners, we (Rotterdam Zoo) are collaborating on this fascinating project!

#conservation #acipenser #sturgeon #river #northsea #fish #rhine
On re-introducing sturgeons to the river Rhine and the North Sea | PhD Theses
AUTHOR(S)= Brevé, Niels Willem Paavo \ Brevé, Niels Willem Paavo \ Brevé, Niels Willem Paavo; YEAR=20242024; PUBLISHER=Wageningen UniversityWageningen University, WageningenWageningen
library.wur.nl
November 27, 2024 at 8:02 PM
Reposted by Mark de Boer
Nice article from our friends at Upwell on their leading edge work studying the lost years of sea turtles, this time off South Africa. 🐢🌍🧪🦑 #seaturtle #marineturtle
www.upwell.org/news/2024/11...
November 26, 2024 at 9:01 AM
Transatlantic Rescue Mission Returns Endangered Kemp's Ridley Sea Turtle Home www.nationalparkstraveler.org/2024/11/tran...
November 15, 2024 at 3:25 PM