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#1
07/12/2005, 11:27 PM
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what is the most humane way to kill a fish
I have a yellow tang, that was stuck to a powerhead when I came home today and has been doing terrible since then. I just found it being eaten by one of my crabs and thought it was dead until I took it away from the crab so I could flush it and it started swimming. It is rapidly turning white and there's no chance it will live.
Any suggestions for a quicker painless death? Thanks |
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#6
07/14/2005, 12:01 PM
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This may be sound horrible, please don't flame me if you disagree... but I had a similar situation with a yellow tang, and I wanted the deed to be done quickly, so I netted it into a plastic bag, which I placed on the counter. Then I used a rolling pin...
It's grisly, but I know for sure that it was all over insantly. Just my two cents Eric |
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#10
07/15/2005, 12:00 AM
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My personal opinion is that the freezer is emotionally easier on the person doing it. Think about it. How long does it take a few ounces of water to freeze. The fish is alive during some portion of this. Keep in mind, I'm not being super eco friendly crazyness, just some thoughts from a physics standpoint.
I agree, the rollingpin method is faster, but many cannot bring themselves to do it. |
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#11
07/15/2005, 12:05 AM
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If the rolling pin is too up close and personal, I've always found it quick and not so personal to wrap the animal in some paper towel and put it in a plastic bag then tuck the bag under the tire of my car ....very quick and there is no way to mess it up. For a fish I'd probably wet the paper towel with tank water to make it more comfortable while I was working.
colleen I really don't know enough to comment on fish anatomy but I've always heard its painful to mammals to freeze to death |
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#12
07/15/2005, 01:26 PM
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The freezer is actually one of the least ethical ways of killing a fish. It's actually quite painful for the fish.
A very humane and almost painless way to kill a fish is in water and adding clove oil. It's like euthanasia. Next time, stay away from the freezer. |
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#13
07/18/2005, 11:00 AM
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We use denatured alcohol, ethanol, for field collections. Most drug stores sell it cheap and it's safe. It euthanizes them quickly.
__________________
"Lose yourself in nature and find peace." - Unknown |
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#14
07/18/2005, 11:14 AM
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alcohol is pretty painful too though, unfortunatly, it burns the fish's bodys very much.
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#15
07/18/2005, 11:35 AM
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wow
this is very interesting. I have not had to deal with this situation. I would like to see if we could get a consensus on the most humane thing, not just the most emotionally appealing for us. I dread the day I will have to do this...
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Thanks for your responses. |
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#16
07/18/2005, 11:37 AM
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Clove oil is very powerful stuff. I have read experiences where people use it as an anestetic
Clove oil, it is my belief is the most humane way for the fish to euthanize it. This also isnt too difficult on the person doing it either, just put the clove oil in a bowl of water, and then the fish. Its pretty quick, and painless (as far as dieing goes). |
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#17
07/18/2005, 11:40 AM
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Unfortunately, there is no painless way of euthanasia just less painfull methods. I agree that the freezer is not very humane and clove oil will do the trick much more humanely.
We use denatured alcohol because it is quick and doesn't "burn" the tissue, otherwise the specimens would be useless for research purposes.
__________________
"Lose yourself in nature and find peace." - Unknown |
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#18
07/18/2005, 12:34 PM
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I read about the clove oil method a little bit ago and it does seem better than anything else.
Soon as I get a chance I'm going to run out and get some and keep it on hand. I just hope I won't have to use it for a long time. |
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#19
07/18/2005, 03:03 PM
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Why isn't a freezer good? Fish aren't mammals, they're cold blooded. Wouldn't their metabolism just shut down? I don't know, I'm curious too, but I thought freezing was painful to mammals cuz we're warm blooded and our body tries all sorts of stuff to keep our body temps normal.
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#20
07/18/2005, 06:15 PM
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The IACUC (intstitutional animal care and use commision) requires that fish be euthanized by icing. In my lab we work with zebra danios. We do genetics so that means lots of breeding but we can't have lots of fish so many must be sacrificed. We have to write into our protocols that fish will be sacrificed by icing or we aren't allowed to use the fish. We make up a tub of icewater and float a tank in it, no need to actually freeze the water with the fish in it. It is very fast.
Fish are cold blooded and don't experience freezing the same way a mammal does. I'm not sure how much they can feel temperature at all. This is testable though, cells that sense temperature are well described and it is simple enough to ask if fish have these. I'll look into it.
__________________
"Science is like a blabbermouth who ruins the movie by telling you how it ends. Well, I say there are some things we don't want to know. Important things!" - Ned Flanders |
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#22
07/18/2005, 07:33 PM
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deedo, its nice to get a professional opinion, or at least procedure. I still like the idea of the clove oil though. I suppose it makes sense, considering they are cold blooded. The ice water bath is also probably better than just straight freezing because it makes contact everywhere, instead of point sources.
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#23
07/19/2005, 11:47 AM
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there is definitely a difference between freezing and cooling...
I assume forming crystals in your body tissue would hurt more than being shut down by cooling.
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Thanks for your responses. |
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#25
07/19/2005, 10:02 PM
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Thats just wrong!
Quote:
Thats just Wrong!
__________________
Greenman Capital Reef Aquarist Society |
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