Culling the Herd
- Thread starter jwreffner
- Start date
rsman
New member
Trigger FOOD !!!!
do I? nope not no more
but im not breeding anything right now
as for the rest.
I culled all defects, its never problematic, the reverse can be true, depending on things like number effected and severity other fish could be harmed by a mass dieoff later on. as for the rest evolution is faster when I help, and is there really a ?humane? way for anything to die, but in the wild most would become trigger food (or other larger fish, remembering small fry can be eaten by small fish ) anyway. otherwise that defect would be a trait.
do I? nope not no more
but im not breeding anything right now
as for the rest.
I culled all defects, its never problematic, the reverse can be true, depending on things like number effected and severity other fish could be harmed by a mass dieoff later on. as for the rest evolution is faster when I help, and is there really a ?humane? way for anything to die, but in the wild most would become trigger food (or other larger fish, remembering small fry can be eaten by small fish
) anyway. otherwise that defect would be a trait.
Stop by some time eh?
NicoleC
New member
I understand that freezing is actually a very painful way to die, although it looks peaceful to us. The temperature shock method - dumping the fish in water that is icing over - will kill without the slowness and painfulness of getting cold.
A chopping block and cleaver is much more fast and humane. (But harder on us!)
I havent tried it, but clove oil is supposed to anesthetize them and an OD will kill them. Also Euthanol or MS-222, which vets use.
A chopping block and cleaver is much more fast and humane. (But harder on us!)
I havent tried it, but clove oil is supposed to anesthetize them and an OD will kill them. Also Euthanol or MS-222, which vets use.
Hmmm that is interesting Nicole. I would have imagined that hypothermia would have similar effects on fish as it does humans. But then again we are warm blooded. But then again after reading your post more carefully, I wasn't referring to dumping them in icy cold water, but rather taking warm aquarium water (from the tank lets say) and putting it in the freezer with them to allow them to drop the temp w/ the water gradually. You still think it wouldn't make any difference?
Jay
Jay
NicoleC
New member
To be honest, we don't really understand how fish perceive pain. However, I sincerely doubt that cold blooded fish get hypothermia like warm blooded humans. The "put take water in the freezer" method does not take into account that the fish are probably aware and feeling for a long time, perhaps even when ice crystals have begun to form in the body.
The "shock" method -- where you bring water to the freezing point (but its still partially liquid) and then suddenly dump the fish in will be much a more instantaneous death, and therefore more humane.
Can you tell I've given a lot of thought to this?
I will probably freak out when it comes my time... I'm hoping to find someone with predatory fish...MorandiWine
Premium Member
As far as I know, fish being cold blooded cant feel cold. Freezing is my prefered method of putting a fish down.
tyler
tyler
jacob30
Member
Back in college one pf my professor's described and had us perform something called "snicking." This involved flicking the fish on the top of the head really hard. I use to do this to my younger brother so I was quite skilled at it 
But seriously freezing seems to be the most humane (at least to us). Of course trigger food would be more natural IMO.
But seriously freezing seems to be the most humane (at least to us). Of course trigger food would be more natural IMO.
rsman
New member
if you have ever seen a fish die from CO2 poisioning you might not think its as kind as it sounds....
though like many things first we cant talk to fish, and especially the dead ones. so the assumption is how they die and if its more or less like it might happen without human interaction. as triggers do eat in the wild, ill go with trigger food.
though like many things first we cant talk to fish, and especially the dead ones. so the assumption is how they die and if its more or less like it might happen without human interaction. as triggers do eat in the wild, ill go with trigger food.
wdt2000
Member
Hope this helps
http://depts.washington.edu/iacuc/policies/fish_euthanasia.html
"Exposure to a solution saturated with carbon dioxide (CO2): When possible, carbon dioxide should be used from a compressed gas cylinder source. However, neither the 1993 nor the 2000 Report of the AVMA Panel on Euthanasia address the issue of the source/production of carbon dioxide as it relates to aquatic animal species. The use of chemical methods for the production of carbon dioxide, such as a saturated solution of sodium bicarbonate or Alka-Seltzer Ã"šÃ‚®, has been proven quite effective with fish as noted in the literature. When dosed adequately sodium bicarbonate renders rapid loss of consciousness and death (4,6). As a result, the use of carbon dioxide liberated by chemical means will also be acceptable for the euthanasia of fish when compressed carbon dioxide gas cylinders cannot be used. Individuals who have demonstrated competency with this technique to qualified personnel (i.e. aquatic animal veterinarian or his/her designate) should perform the euthanasia of fish by carbon dioxide."
"The 1993 and 2000 Reports of the AVMA Panel on Euthanasia concludes that cooling to 4Ã"šÃ‚°C will decrease metabolism and facilitate handling of poikilothermic species. This method by itself should only be used to facilitate handling, and it does not constitute an acceptable method of euthanasia since there is no evidence that it reduces pain or is clinically efficacious"
http://depts.washington.edu/iacuc/policies/fish_euthanasia.html
"Exposure to a solution saturated with carbon dioxide (CO2): When possible, carbon dioxide should be used from a compressed gas cylinder source. However, neither the 1993 nor the 2000 Report of the AVMA Panel on Euthanasia address the issue of the source/production of carbon dioxide as it relates to aquatic animal species. The use of chemical methods for the production of carbon dioxide, such as a saturated solution of sodium bicarbonate or Alka-Seltzer Ã"šÃ‚®, has been proven quite effective with fish as noted in the literature. When dosed adequately sodium bicarbonate renders rapid loss of consciousness and death (4,6). As a result, the use of carbon dioxide liberated by chemical means will also be acceptable for the euthanasia of fish when compressed carbon dioxide gas cylinders cannot be used. Individuals who have demonstrated competency with this technique to qualified personnel (i.e. aquatic animal veterinarian or his/her designate) should perform the euthanasia of fish by carbon dioxide."
"The 1993 and 2000 Reports of the AVMA Panel on Euthanasia concludes that cooling to 4Ã"šÃ‚°C will decrease metabolism and facilitate handling of poikilothermic species. This method by itself should only be used to facilitate handling, and it does not constitute an acceptable method of euthanasia since there is no evidence that it reduces pain or is clinically efficacious"
