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Blueberry milkshakes (i.postimg.cc)
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[-] Cheesus@lemmy.world 278 points 1 year ago

For those who don't know, the blue liquid is their blood

Why are they draining it in this way? Poor things.

[-] CluckN@lemmy.world 210 points 1 year ago

It’s catch and release so they let them go afterwards where they found them. Horseshoe crab blood is an essential biomedical tool that’s saved countless lives.

What are some example uses for the blood? I’m fascinated.

Thanks for the reply too.

[-] CluckN@lemmy.world 134 points 1 year ago

It’s an anticoagulant and can detect the smallest traces of endotoxins in medicine. I’m sure I’m missing some details but there are some great medical journals that detail the process and help explain why it’s $60,000 a gallon.

[-] Mercival@lemm.ee 46 points 1 year ago

It is not an anticoagulant, quite the opposite actually. The blood (limulus amoebocyte lysate) will coagulate at the slightest hint of gram-negative bacteria and their endotoxins.

It's most likely a defense mechanism against bacterial infections.

It's widely used in medicine to check for bacterial contamination of injectable pharmaceuticals.

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[-] Zron@lemmy.world 35 points 1 year ago

Where can someone find these horseshoe crabs?

And are they able to be bred in captivity?

Pls respond fast, I’m already driving to home depot to buy the largest above ground pool they have.

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[-] EvilCartyen@feddit.dk 38 points 1 year ago

The blood contains a coagulent which clots in the presence of bacterial toxins. It is extracted and used to ensure that medical equipent and stuff such as vaccines are sterile and safe.

[-] prayer@lemmy.world 23 points 1 year ago* (last edited 1 year ago)

The main use is to detect how much endotoxins (proteins that cause our immune system to react) are present in a sample. This is important because we often use bacteria/fungus/yeast to produce medicine and then remove the microorganism from that medicine. This checks for anything left behind in that process, far more sensitive than any other test or machine can do.

If it wasn't for horseshoe crab blood, creating medicine that is safe for injection would be a lot harder and potentially more dangerous.

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[-] Alabaster_Mango@lemmy.ca 79 points 1 year ago* (last edited 1 year ago)

Here's a description of the bleeding process:

https://www.horseshoecrab.org/med/bestpractices.html

It's specifically non-fatal:

Bleeding horseshoe crabs to death is not an acceptable practice in the U.S.

The volume of blood taken is actually quite small, as most of the material in the collection jars is anticoagulant.

It may look uncomfortable to us humans, but keep in mind that horseshoe crabs are not human. What's normal for the spider is chaos for the fly. Granted, it would be kinda weird to be hoisted from your home by a giant ape and forced into a blood drive. It's done as gently as possible though.

[-] bstix@feddit.dk 68 points 1 year ago

Unfortunately the practice often results in death anyway. 30% die in the process.

It also has unforseen consequences in the food chain, so by all means we should look for alternatives.

Thankfully alternatives already exist .

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[-] shalafi@lemmy.world 21 points 1 year ago

Still, I was disappointed to find that a large percentage of released crabs die anyway. Can't find the number, but it's significant. 1/3rd?

[-] lemmylommy@lemmy.world 11 points 1 year ago

Afair estimates put the portion of dead crabs between 10 and 30%. Some might also be unable to reproduce due to the bleeding.

[-] Mercival@lemm.ee 14 points 1 year ago

Sadly a lot of the companies harvesting them will just kill and sell them for bait anyways.

Of those that are released, about a third die. Not to say about the decrease in overall fitness, which can lead to them falling prey more easily.

It's obviously a traumatic experience for the animal in the best case scenario and that is going to reflect on their ability to survive in the wild.

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[-] ILikeBoobies@lemmy.ca 30 points 1 year ago* (last edited 1 year ago)

Highest chance of survival/low stress

Edit: many do die still. I don’t want to say it’s safe, just safer

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[-] Imgonnatrythis@sh.itjust.works 88 points 1 year ago

Obviously didn't read the meme. It's a blueberry milkshake. Everyone knows blood isn't that color.

[-] menemen@lemmy.world 15 points 1 year ago* (last edited 1 year ago)

So this is basically like a blood farm from vampires? Shit, still surprises me what an evil species we really are.

[-] zazaserty@discuss.tchncs.de 16 points 1 year ago

I kinda agree with you but when you think about it it's not that bad. They are released afterwards and we can use that blood to save countless people, like you and me.

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[-] Captain_Patchy@lemmy.world 153 points 1 year ago

People who know know that the crabs survive and are released back into the wild after their "donation"

[-] Ddhuud@lemmy.world 21 points 1 year ago

Most of them, yes.

[-] Draedron@lemmy.dbzer0.com 15 points 1 year ago

So we only catch them, torture them as much as we want and then act like we do good because at some point we "release" them to torture them again in the future.

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[-] Tikiporch@lemmy.world 58 points 1 year ago

If horseshoe crabs were to become less economically important, is that a good thing for horseshoe crabs? They ain't exactly Pandas, so will little Sally and Bobby care if horseshoe crabs become endangered? They're already in a precarious situation...

[-] miss_brainfart@lemmy.ml 40 points 1 year ago

Horseshoe crabs have been existing for almost half a billion years, I would genuinely be sad if we endanger them to critical levels

[-] Duamerthrax@lemmy.world 29 points 1 year ago

Climate Change is warming the waters they spawn their eggs in. They're becoming endangered from that. Not because of a few we harvest blood from.

[-] miss_brainfart@lemmy.ml 13 points 1 year ago

I didn't say that harvesting blood is the one thing endangering them, did I. Just that it would be a shame to see them go

[-] Duamerthrax@lemmy.world 10 points 1 year ago

That's the topic of this thread and even if you didn't say blood harvesting was endangering them, most people are already going to be thinking that's what you're implying.

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[-] kandoh@reddthat.com 34 points 1 year ago

I think living to have your fluids harvested in factory farms is a worse outcome than going extinct.

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[-] joyjoy@lemm.ee 29 points 1 year ago

They're actually being fed the blue milk from Star Wars 8

[-] Maultasche@feddit.de 12 points 1 year ago

That was green milk. Blue milk is from Episode IV.

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[-] Draedron@lemmy.dbzer0.com 16 points 1 year ago

Stop all animal testing and torture

[-] bill_buttlicker@lemmy.world 26 points 1 year ago

This isn't specifically animal testing, rather it is a process to get life saving medicine. They are working hard to synthesize it luckily. This has been the subject of a few major podcasts but I can't remember which ones.

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[-] abraxas@sh.itjust.works 19 points 1 year ago

First off, this isn't testing. We know exactly what we need Horseshoe Crab blood for, and it's incredibly important.

Second, it's probably not torture. The worst-case-scenario level of discomfort from bleeding them is fairly low, like a human giving blood. And that (incorrectly) presupposes them having as advanced pain-sensing as humans. The actual death rate is the bigger issue, but we are talking about saving lives and the medical community is trying really hard to change the status quo on this. Covered below.

Third, what you're seeing in that picture saves thousands of lives per year. How much human suffering, how many human deaths, are you willing to accept to achieve those goals? What if one of those humans that has to suffer or die was your kid? There's no plant-based alternative to this process at this time.

Let me clarify this. Using horseshoe crabs for this purpose is VERY EXPENSIVE. It's only done because we don't have an alternative yet, and the process is necessary for modern medicine. There is plenty of research going into either making this process less expensive (which probably involves a lower death rate for crabs) or finding an entirely different process to achieve the same goals. But none has been found (well, except that they used to use rabbits for this. I don't know the details)

I can understand the desire to spare... um...shellfish some..uh.. pain I guess. But NOT at the expense of human life and suffering. That's just silly.

[-] MooseBoys@lemmy.world 14 points 1 year ago* (last edited 1 year ago)

It’s a simple, nearly instantaneous test that goes by the name of the LAL, or Limulus amebocyte lysate, test (after the species name of the crab, Limulus polyphemus). The LAL test replaced the rather horrifying prospect of possibly contaminated substances being tested on “large colonies of rabbits.” Pharma companies didn’t like the rabbit process, either, because it was slow and expensive.

From https://www.theatlantic.com/technology/archive/2014/02/the-blood-harvest/284078/ (emphasis mine).

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[-] anarchy79@lemmy.world 11 points 1 year ago

This is the kind of shit you see right at the start of alien invasion type sci fi flicks.

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this post was submitted on 08 Nov 2023
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