Looking for France's Most Toxic Scorpion - Outdated
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- เผยแพร่เมื่อ 26 ส.ค. 2024
- Looking for the most venomous scorpion in France, the Yellow Scorpion (Buthus occitanus).
EDIT: Since the species Buthus pyranaeus (Ythier, 2021) was recently described in the paper "The genus Buthus Leach, 1815 (Scorpiones: Buthidae) in France with description of a new species from the Eastern Pyrenees", it is now unknown which species in France is most venomous. At the time that I had recorded this video, B. occitanus was the only Buthus species known from France.
LD50 (BotIT6 toxin) values by geography:
1. Buthus occitanus "Mediterranean" - 0.90 and 1.44mg/kg
2. Buthus occitanus paris "S. France" - 4.15mg/kg
3. Buthus occitanus tunetanus "N. Africa" - 0.90mg/kg
A few notes to make here. As I mentioned in the video, B. occitanus "Mediterranean" is vague and hardly useful by itself, but one of its LD50 values matches up exactly with that of the group collected from North Africa (either Tunisia, Algeria, Libya, or Morocco) so we can reasonably assume that this group was also from North Africa. There are two values for the "Mediterranean" group because its actually comprised of two groups, Hassan 1984 and Zlotkin 1976, presumably from two separate locales. The subspecies denomination, B. o. paris, given to the group collected from Southern France is erroneous as far as I can tell. This is because B. occitanus spp. paris was a subspecies from Morocco that was elevated to its own species, Buthus paris, in 2003. Buthus paris was actually originally described as its own species in 1839, but there was some synonymization and reclassification between then and now, ultimately leading the species back to its current taxonomical position. When there is incongruity between collection data and an ID assigned to specimens by the collector, I tend to trust the data provided more, so, in this case, I believe that the specimens were truly collected from Southern France and are not B. paris from Morocco. Lastly, Buthus occitanus tunetanus, along with all subspecies of B. occitanus that once were, is no longer valid. It was elevated to the species level in 2003 too. This isn't too relevant to the subject matter though, I know, but I wanted to point out anything here that is outdated regardless. Buthus has had quite a few former subspecies, so I'm glad that modern systematics (as of 2000) mostly cleared up the mess, thus allowing us to understand an older venom analysis. Let me know what y'all think if you read any of that. :D
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I went to Italy, stayed on my family's farm. At night I went outside and found many scorpions crawling around on the farm.
love how you preface the video with "we're gonna go find the most venomous bug in france" and then just immediately find it every time.
Bro I just discovered your channel a few days ago. Super interesting. And I like that you’re knowledgeable. Thanks for sharing!
Thank you. :)
Lol that tiny snake was pissed and quick 😂
Thanks for sharing your adventures!
This scorpion-related video is also very good.
This video was filmed during the day, so it was even better to see.
It would be nice to be able to see the habitat of scorpions during the future.
Amazing to see so much wildlife in the burn area (especially scorpions), I've read that there's also intraspecific variation in E. flavicaudis regarding venom toxicity. It seems to be a general rule that the higher the average temperature in a region the higher levels of venom toxicity, my theory is less moisture so more concentrated?
This is a good hypothesis. It could also be that food is more scarce in arid environments than it is in mesic ones. Related: "Euscorpius flavicaudis sting is not lethal but not harmless either: First record of neurological symptoms in child after sting" (Vaucel et. al., 2020). Read this paper and let me know if you think it holds any significance. Seems flawed to me; not only is it repetitive, but its a bit aimless in the sense that very little of the text pertains to the title.
@@GeneralApathy After re-reading the paper I don't dispute the severity of the envenomation and I can't completely disregard intraspecific variation as a potential cause given the distribution of E. flavicaudis, however it could also simply be due to the child being in poor health or any number of variables. It would amazing if someone collected individuals from different corners of the range and compared LD50 values no doubt it's into the KGs lol
I have recently watched on Netflix a documentary called Europe's largest desert, which was about the only desert in Europe, the Tabernas desert
Great video, I love your scorpion videos
Thank you.
Buthus occitanus is the most widespread european buthid scorpion, and its easternmost distribution is in north-western Italy
Oh I just found out about your channel ! I wish I could have met you there, I know all the scorpion spots around Montpeillier :)
Buthus occitanus is the most venomous scorpion in France and is potentially dangerous to humans but typically not deadly
They all aren't if you aren't weak, allergic a child or a old man ... Usually they don't have enough venom to kill to you but if you get stung in a bad spot maybe then it's lethal but usually you are fine except it would hurt or something else like necrosis or or types of nasty stuff 😅
@@FUCKTHEBBC Buthus occitanus is common in the only desert of Europe, the Tabernas desert
@@FUCKTHEBBC Like most scorpions, Buthus occitanus has a neurotoxic venom, so it does not causes necrosis
The only scorpions with venom that causes necrosis are the members of the genera Nebo and Hemiscorpius, and Hemiscorpius lepturus is a middle eastern scorpion that is notoriously known for its haemotoxic venom that causes necrosis
Have you ever heard of Hemiscorpius lepturus the Gadim scorpion ???
Weird, I had no idea there were geckos and scorpions in france. You think of these as more subtropical in terms of the furthest north you would find them. The southest shore is no further south than my region in Southern Ontario (about 43 degrees north), so I would have expected the same general types of animals.
I love that vidéo
The scorpion Buthus occitanus is also present in Italy, but we need to check if it occur naturally in Italy or if is actually an introduced species
Since his repartition in really wide across the Mediterranean basin and that Italy have a good amount of dry shrubland it’s very likely that it is a native specie
Was it easy to find these? Going to southern france in june. Havent really went looking for scorpions before, do you think there will be some in early june? Thanks in advance
They were quite common both times I was in range for them. That being said, it may benefit you to search for them at night if the conditions are hot and dry.
@@GeneralApathy Thanks :)
The largest Spadix I’ve ever found was like these scorpions. In a hole under a rock
I have one of this as a pet
The best way to find easily scorpions in Europe is going into the Tabernas desert, the only desert in Europe
Another video!!!
Let me know if you ever go back to France !
The title has a typo
Thank you.
a bit late to the party but i hope you enjoyed your stay here :)
I never knew France had Scorpions and Centipedes
What’s the largest species in France?
Nvr mind