Kevin Thiessen, PhD

DIC images of developing Mnemiopsis embryos at various stages, beginning with a zygote in (A) until 9 hpf in (P). (A) Zygote. (B) 2-cell stage. (C) 4-cell stage. (D) 8-cell stage. (E) 16-cell stage. (F, G, H) 32- to 60-cell stages. (I, J, K, L) Gastrulation. (M, N, O, P) Post-gastrulation. The aboral side is up. hpf, hours post fertilization. Additional file 1 shows the embryonic development of the same specimen in a time-lapse movie. Taken from Figure 2 in Fischer et al. EvoDevo 2014

The part in this video can happen to a degree in other phyla but it's the asymmetric cleavages at later stages that really sets Ctenophores apart (see images below). You can read more about the process in this 2014 research paper from the Mark Q. Martindale Lab: pmc.ncbi.nlm.nih.gov/articles/PMC...

The comb jelly or sea walnut (Mnemiopsis leidyi) undergoes a Ctenophore-specific cleavage program that is characterized as unipolar and holoblastic (total cleavage). This offspring came from a specimen found in Eel Pond in Woods Hole, USA. Credit to 2017 Embryology Course at @mblscience.bsky.social.

It took me four years to switch to the UK language/dictionary on Word 🙈 Keep calling it estrogen!

People get paid to do this?! 🤦 If you ever need a niche zebrafish-specific editor, you know where to look 👀

a cartoon dog is sitting in front of a fire and saying i 'm fine this is fine everything is fine Alt: a cartoon dog is sitting in front of a fire and saying i 'm fine this is fine everything is fine

Me: Trying to get work done as an American living abroad

Cute lil' globby guy 😍

Happy #RareDiseaseDay! I had fun putting this thread together. It’s just a small morsel of the amazing #zebrafish work done by the Undiagnosed Diseases Network. For a full list of fishy publications from the UDN, see: pubmed.ncbi.nlm.nih.gov?term=Undiagn... @zdmsociety.bsky.social @izfs.bsky.social

@hammofish.bsky.social Check this out!

Turn down the brightness, please and thank you. 😉

a man in a suit and tie is smiling and says you sound unhinged Alt: a man in a suit and tie is smiling and says you sound unhinged

Usually that’s the kind of thing you keep to yourself 😉 😂

Do you really have notifications set for all zebrafish papers? 😳

This looks like a fantastic course! And Woods Hole is lovely, too 😍

That’s very German of them. I miss those traditions and the unique culture of the region 😩

They have an ethics statement in their paper that says “Sampling in Greenland was carried out following laws and regulations and with authorization from the Government of Greenland” so it wasn’t illegal. Personally I just can’t imagine killing something that old. It’s like chopping down a great oak.

The preprint says “Sampling in Greenland was carried out following laws and regulations and with authorization from the Government of Greenland” but doesn’t mention bycatch just long-line fishing. I’m becoming more and more cynical 🤨

Don’t get me wrong, I am a believer in the benefits of animal research but doesn’t this raise a lot of ethical issues related to capturing and harvesting of a nearly-endangered species?

So exciting! Keep us fin-formed 😉

I'm curious! Are you testing different temperatures or oxygen gradients this time around or something new? Any spoilers you can share?

Please help Zebrafish Husbandry Association get their measure over the line 🙏 #ThatsHowWeShoal

More details ⬇️
🔗 to become ZHA member: www.zhaonline.org/membership
🔗 to vote (Please don't spam): docs.google.com/forms/d/e/1F...
🔗 to current Constitution and Bylaws: www.zhaonline.org/constitution...

Could also be bad timing with AWS (US mirror site) using Cloudflare (which has been down sporadically).

Is this restricted to the US? It works fine in the UK. Could you try another mirror site and see if that works?

Very jealous! Do you find any other species in the shoal other than conspecifics?

Happy to have contributed the member news as part of @zebrafishrock.bsky.social 😀 Do check out the other features in the News Splash when you've got a few minutes to spare!

🔗 to member news: www.izfs.org/newssplash/n...

FFS 🤦‍♂️

And here I was starting to think that working on wu:fc01d11 during grad school was unfortunate! 😂

I still don’t know what it means. I definitely do not slay if this post is any indication bsky.app/profile/zebr...

a man says " you 're saying the quiet part out loud " in a living room ALT: a man says " you 're saying the quiet part out loud " in a living room

No comment 🤣

Finally putting my social media skills to work for my favorite societies 💪

Happy to announce I've joined the IZFS Publications & Communications Committee to coordinate their member news for the News Splash!

I've also taken on the role of Co-Chair of the newly-formed ZDMS Communications Committee!

Enhance your timeline on #InternationalDayOfWomenAndGirlsInScience by following our two(!) Starter Packs of outstanding Group Leaders and Senior Scientists from the #zebrafish community! 🐟 🧪

#WomenInScience Volume 1: go.bsky.app/4BegEjv
#WomenInScience Volume 2: go.bsky.app/VoebYrt

Really enjoyed this imaging spotlight by @focalplane.bsky.social. The transgenics are 🔥!