[-] Sal@mander.xyz 2 points 1 day ago

Very interesting list! I am especially curious about Matt Brown's videos. Thanks!

[-] Sal@mander.xyz 3 points 1 day ago* (last edited 1 day ago)

Fresh from the Farm Fungi - he is a mushroom farmer from Colorado. He has a ton of valuable information on growing mushrooms and running a business. He also has a few series of videos on very interesting experiments such as growing boletus, morelles, and cordyceps.

Microbehunter - he is a biology teacher that runs a microscope channel. His videos are very useful for learning the basics of microscopy.

Huygen Optics - I'm not sure about this guy's background. He worked in R&D for Phillips in the 90s and he knows a lot about optics and chemistry, but I don't know much more. He has built some equipment in has garage for sputtering metals on surfaces and has some pretty cool videos.

MissOrchidGirl - she is more popular than the others. She has great info about caring for orchids and a fantastic orchid collection.

Ben Felix - he is a portfolio manager with very solid financial advice. He supports his claims with research articles.

[-] Sal@mander.xyz 7 points 2 days ago* (last edited 2 days ago)

The "Slur filter" is a server setting. The filter makes use of a "regex" (a text matching algorithm) to automatically remove any text that matches those words. An admin needs to explicitly set the rules for that regex. The regex does not take language into account, it is a simple text matching algorithm.

The box is in the Admin settings page and looks like this:

I know that lemmy.ml makes use of a strict set of regex rules. The translation of the french word for "late" matches an ableist slur in English, and so it is removed by lemmy.ml. ~~I am not sure about whether you can check regex for each individual server, but I believe that most instances don't filter that specific word out.~~

EDIT: Ah, I found out how to check the regex. You can check an instance's regex by going to the the URL https://{instance}.{TLD}/api/v3/site and looking for "slur_filter_regex". For example, for lemmy.ml you would go to:

https://lemmy.ml/api/v3/site

[-] Sal@mander.xyz 15 points 2 days ago
[-] Sal@mander.xyz 3 points 2 days ago

If you don't mind sharing, please do!

I looked a bit more into it and discovered that some people do use UV lights for inducing stress responses on plants. Most of what I found is from cannabis growing communities that make use of the UV light to increase the potency of the plant. I don't know how effective that is, but that did signal to me that some shops might sell UV lamps as grow lamps.

An example of a specific lamp I could find is the MIGRO UVB 310. If you follow that link and look through the images you will see that the bulb is clearly labeled with "UV BOOST".

These lamps are meant to be used as supplemental inputs to stress the plant. It is not very likely that you ended up with such a lamp by mistake as it is still a niche type application. But it is good that you are making sure.

[-] Sal@mander.xyz 15 points 2 days ago

I don't know how to set up a specific image captcha, but I like that idea! I have added that to the registration form 😛

[-] Sal@mander.xyz 14 points 4 days ago* (last edited 4 days ago)

Does the bulb have some model written on it? If you tell us the specific model we may be able to find the properties of that light.

There is a good chance that you do not have a "UV lamp" but instead a purple grow light that does not emit a lot of UV. The purple grow lights have an emission that is tuned to the regions of the spectrum for which green plants absorb the most light - so, the lamp emits mostly in the blue and red, which is why they look purple. There is no need to worry about that light, it is perfectly safe.

If you do have a UV lamp and are using that lamp for a plant: Then we really do need more information to estimate the level of risk. Chances are that, if that UV lamp is harmful to you, it is also harmful to the plant, and it is better to swap it for some other type of lamp.

It is not very likely that you are using a one of the more dangerous UV lights - like a mercury-vapor lamp with a quartz bulb - which will produce smelly ozone and can burn your eyes if you stare at them. Those lamps tend to be specialized items that you are unlikely to end up with by mistake. More common lamps would be the blacklights with common variants that produce 365 nm or 395 nm light. Continuous direct exposure of moderately intense 365 nm carries a low risk inducing skin cancer and is better to avoid. 395 nm is relatively safe but I would still not want to expose my skin continuously to it as it may still cause oxidative stress to the skin. These are used ornamentally for making things glow, but they are not the best choice for plants.

[-] Sal@mander.xyz 6 points 5 days ago* (last edited 5 days ago)

Very cool!! My opinion is that it is a thin gila monster

I found another image of a Gila monster with a similar color pattern - with the small black dots inside hexagonal orange patches: https://btarboretum.org/wp-content/uploads/2024/04/20230410_102910-1536x1536.jpg

[-] Sal@mander.xyz 5 points 6 days ago* (last edited 6 days ago)

Good question. The green pigment is biliverdin, which is a product of the breakdown of heme. But more specifically I am not quite sure, I'll have a look.

I have found this open access article from 2020:Taboada, Carlos, et al. "Multiple origins of green coloration in frogs mediated by a novel biliverdin-binding serpin." Proceedings of the National Academy of Sciences 117.31 (2020): 18574-18581.

This article goes into more specificity about the protein that binds the pigment and allows it to become concentrated inside of the body and bones. In this article they point out that green is a difficult pigment to make using vertebrate biochemistry. Multiple frogs have evolved in parallel this mechanism to sequester the green biliverdin within the body, develop a translucent skin, and become green this way (for camouflage).

However, the common milk frog is not very green. It could be that the biliverdin-binding protein is a trait that is derived from an ancestor and is now vestigial. In the cited article, near the end, they do include a section "Other BBSs Functions". In this section they point out that some frogs with green bones do not look green, and suggest that the protein could be involved in inflammation pathways and behave as an anti-oxidant. But nothing conclusive.

I quickly skimmed for other recent papers but I can't find anything conclusive.

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submitted 1 week ago by Sal@mander.xyz to c/herpetology@mander.xyz

This is a Trachycephalus typhonius, formerly Trachycephalus venulosus, from Yucatan.

These frogs secrete a sticky and irritant milk-like fliud through its skin when bothered. Several years ago I got some some of that fluid into my eyes by accident - that hurts similar to scratching one's eye after touching a spicy pepper. So, they are not terribly toxic but I certainly do not recommend the experience.

Funnily enough I just ran a search and found a publication of someone who describes a similar but worse experience: https://www.thebhs.org/publications/the-herpetological-bulletin/issue-number-152-summer-2020-1/3101-09-a-caution-on-handling-i-trachycephalus-venulosus-i-anura-hylidae-toxic-effects-of-skin-secretion-on-human-eyes/file

You may notice that the finger pads of this frog look green. That's because its bones are green! A characteristic feature of this species. Here is a photo (not mine) of a skeleton of one of these : https://www.pybio.org/wp-content/uploads/2008/06/t-ven31.jpg

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submitted 1 month ago* (last edited 1 month ago) by Sal@mander.xyz to c/herpetology@mander.xyz

A new paper on a Bolitoglossid showed up in my alerts today! 🥳

It is a one-pager and comes with a beautiful photo of a foraging arboreal salamander 😄

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Imantodes cenchoa (mander.xyz)
submitted 1 month ago* (last edited 1 month ago) by Sal@mander.xyz to c/herpetology@mander.xyz

Found this Imantodes cenchoa sleeping on top of a leaf in Punta Laguna, Quintana Roo.

Here is a photo of where it was sleeping:

There are a few different snakes of the genus Imantodes in Yucatán. What sets this species apart is that the row of scales on its back consists of enlarged scales. Here is a closeup emphasizing that row of scales. The green arrow points at an enlarged mid-dorsal scale, the blue arrow at a regular scale.

In comparison, here is a photo from an Imantodes tenuissimus that I took back in 2009 in Mérida, Yucatán (with a less sharp camera), and a closeup of its mid-dorsal scales that does not show this enlargement.

Imantodes tenuissimus

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submitted 1 month ago* (last edited 1 month ago) by Sal@mander.xyz to c/herpetology@mander.xyz

One of my favorite frogs! Spent some time specifically looking for it. Managed to find two near Cobá, in Quintana Roo (in the Yucatán peninsula). This frog hides in holes in lime stone and tree trunks, and makes use of its flat head to block the entrance. This type of defense is known as phragmosis.

Some other shots:

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Anole sleeping (mander.xyz)
submitted 1 month ago by Sal@mander.xyz to c/herpetology@mander.xyz

Found this anole in Yucatan. I am not sure of its exact species - probably an Anolis sp..

Anoles often sleep at the tips of leaves and twigs. My guess is that this is a strategy to prevent nocturnal predators sneaking up on them through the branches without making its bed vibrate. When woken up they can quickly drop down.

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Leatherleaf slug (mander.xyz)
submitted 1 month ago by Sal@mander.xyz to c/invertebrates@mander.xyz

These are quite common in Yucatan, Mexico.

The leatherleaf slugs belong to the family Veronicellidae. This particular one could be Sarasinula plebeia, but it is not so easy to definitively ID these.

I originally identified this species a few years ago from the description on this website, but since then they have added an update stating that my original source is also unsure on this one.

UPDATE: It seems that IDing certain slugs by pictures isn’t a good idea. In 2024 when pictures on this page were uploaded to iNaturalist, another user suggested a different species in the genus Leidyula, and then user “deneb16,” a mollusk specialist at UNAM, Mexico’s main university, added the comment that all Mexican species of the family this slug belongs to can’t be identified without dissecting their sexual organs. The family, she agrees, is the Leatherleaf Slug Family, the Veroncellidae.

So, I am not 100% of the species, but it is a leatherleaf slug.

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submitted 1 month ago by Sal@mander.xyz to c/herpetology@mander.xyz

adult greenhouse frog

baby greenhouse frog

Found many of these frogs under a wet trash bag in a back yard in Mérida, Yucatán. I made use of a handheld flash with a remote trigger for lighting, and a Sigma 105 mm as my macro lens.

These frogs do not seem to match with any of the local frogs reported in Julian C. Lee's field guide to the amphibians and reptiles of the maya world.

From a reverse image search, I mostly found images of the green house frog Eleutherodactylus planirostris. Eleutherodactylus planirostris is native to Cuba and the Bahamas, and is often introduced with plants that come from green houses in those areas. These frogs go from tadpole to frog while still inside of the egg, which explains why the baby frogs are so small.

The visual aspect, the incredibly small baby frogs, and the fact that they were found in a back yard in the city with greenhouse plants, all lead me to conclude that it is likely Eleutherodactylus planirostris.

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submitted 4 months ago by Sal@mander.xyz to c/earthscience@mander.xyz
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submitted 4 months ago by Sal@mander.xyz to c/herpetology@mander.xyz
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Prey specificity of predatory venoms (onlinelibrary.wiley.com)
submitted 4 months ago by Sal@mander.xyz to c/biology@mander.xyz
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submitted 4 months ago by Sal@mander.xyz to c/herpetology@mander.xyz
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submitted 5 months ago* (last edited 5 months ago) by Sal@mander.xyz to c/herpetology@mander.xyz
[-] Sal@mander.xyz 50 points 8 months ago* (last edited 8 months ago)

I think that they are referring to Paxillus involotus

It is quite an interesting mushroom. It was considered "safe to eat" for a long time, but it contains an antigen that a human's immune system can learn to attack.

The antigen is still of unknown structure but it stimulates the formation of IgG antibodies in the blood serum.

I once looked into whether this immune response builds up over many exposures, or if it is a random event that has a probability of happening for each exposure. I don't remember finding a convincing answer... If it is a random event, then mushroom could be considered a "Russian roulette" mushroom that will usually provide a nice meal, but, if unlucky, you may experience the following:

Poisoning symptoms are rapid in onset, consisting initially of vomiting, diarrhea, abdominal pain, and associated decreased blood volume. Shortly after these initial symptoms appear, hemolysis develops, resulting in reduced urine output, hemoglobin in the urine or outright absence of urine formation, and anemia. Hemolysis may lead to numerous complications including acute kidney injury, shock, acute respiratory failure, and disseminated intravascular coagulation. These complications can cause significant morbidity with fatalities having been reported.

I agree with you that this is probably unrelated to the "generally similar to humans" comment. I feel like this fantasy is a combination of the above fact mixed in with the fact that the Fungi belong to the Opisthokonts, which places them closer to animals than plants, and so they share some interesting cellular characteristics with us. This places them closer to animals than plants, but "generally similar to humans" is perhaps a bit of a stretch ^_^

But, it is just a meme about a guy being hyped about mushrooms. Hopefully people don't expect memes to be super accurate 😁

[-] Sal@mander.xyz 54 points 1 year ago

Really cool! I'm excited to learn more about you and the project!

What's the format? Should we submit questions beforehand, or will you process questions that arrive at the start time? I've never participated in an AMA 😅

[-] Sal@mander.xyz 48 points 1 year ago* (last edited 1 year ago)

My view is: I don't like this cultural element, and I am glad that I live in a country without it. But if I am a visitor from abroad I would not resist the local culture and try to impose my own values. If I am aware of this cultural element and I dislike it, my options would be to either avoid restaurants and other tipping situations as much as I can, or simply account for the tip when making my financial decisions, and pay it.

If I live in the country then it is different, because then I am more entitled to be a driver of change. Personally, my approach would be to support businesses with explicit no-tipping policy, and to refuse receiving tips myself.

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Sal

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