|
|
Location: Ontario | Looks like this urban myth is busted
Pouring Diet Coke or other carbonated beverages on a fish's injured gills does not stem the bleeding, the researchers determined.
https://ottawacitizen.com/news/local-news/carleton-study-suggests-di...
Edited by lifeisfun 8/31/2020 8:13 AM
|
|
| |
|
Posts: 2015
| But did they try Jack & Coke? poor fish could use a highball in the last hour of life!!!
|
|
| |
|
Posts: 668
Location: mercer wi | I thought it was sugar not carbonated drinks. Diet coke has no sugar |
|
| |
|
Location: Ontario | It had nothing to do with sugar 
But now we know it's better to drink it anyway. |
|
| |
|
| upnortdave - 9/1/2020 6:53 PM
I thought it was sugar not carbonated drinks. Diet coke has no sugar
The story says among the options being touted by supporters was heavily carbonated water, like seltzer, can be used so it isn't the sugar. |
|
| |
|
Posts: 355
Location: Selkirk, Manitoba | Here is more details as to the explanation of why there is a correlation- coincidental timing which is creating confirmation bias:
Illusions of bradycardia, tachycardia
The results showed water temperature had no effect on bleeding and, Cooke said, “Although it looks as though carbonated water or pop poured over the gills of an injured fish helps it to survive, and anglers should feel no regret for doing so, it is an illusion created because of bradycardia.”
Cooke explained “When a fish is taken out of water, its heart stops for about 30 seconds, No heartbeat. Bradycardia. No bleeding. After 30 seconds. Tachycardia. More rapid heartbeats. Lots of bleeding.”
She and her team caught northern pike with hook and line and separated them into two groups which had had their gills clipped. One group was used as a control; the other treated with carbonated beverages poured over their injured gills.
Temperature and ingredients were tested to see if chilled drinks had any different effect than ones at room temperature. The pike were placed in lake water in white-bottomed coolers, which allowed researchers to see and measure bleeding.
Trahan said, “What fools those of us releasing fish after dousing their gills with pop is bradycardia, and the typically dark colour of the lake or river bottom (which doesn’t contrast with the colour of the blood) that begins to flow when the fish somewhat recovers and tachycardia sets in. Our experiment used coolers with white bottoms so that we could see blood flow.”
from: https://oodmag.com/soft-drinks-not-so-good-for-fish-either/
Edited by Angling Oracle 9/2/2020 8:25 AM
|
|
| |
|
Location: Eastern Ontario | What I would like to know is the mortality rate for the two groups |
|
| |
|
Location: Ottawa River | The clipping of pikes gills isn't anything like the nick we typically see when a hook slices a gill. I'm suspect of this test. I've done the carbonation thing and seen it work. Dark bottom??? I can see blood or not. The thinking is that the carbonation (in any beverage of this like) swells the blood vessels enough to squeeze the cut.
You have to agree lifeisfun that anything that "may" help save a bleeding fish is worth it. If they get their cheek cut we don't use pop but press on the wound for a minute or so in the net and that often will stop the obvious bleeding. We at the Ottawa River Musky Factory will keep the pop in the boat. Let's all, as I know personally you do, make healthy releases a priority.
|
|
| |
|
Posts: 105
| For a more visual aid, this video sums it up quite well. It seems to work due to the CO2 and fish's biology, slowing a fish's heart rate for about 30 seconds appearing to stop or slow bleeding. But the results are temporary and don't show any evidence of actually helping a fish.
https://youtu.be/qRo3ZFyvYvs
I hear you though, I'd just about try anything if i had a fish bleeding on me.
|
|
| |
|
Posts: 355
Location: Selkirk, Manitoba | ^^
That is a pretty good video.
Note that fish have a single circulatory system vs double in mammals - so their heart pumps blood to the gills and then the blood continues on to provide oxygen to their organs/muscles and finally comes back to heart to be pumped again (versus us where our heart gets freshly oxygenated blood in our double system, their heart gets the last vestiges of oxygen in the single system after it goes through entire body first). It is thus imperative for the fish that whatever blood that is in the gills is getting a good supply of oxygen - and hence the brachycardia is to protect the heart when the gills detect they are in low oxygen conditions - ie. out of water or immersed in C02 (soda).
Paper on brachycardia response in fish: https://jeb.biologists.org/content/210/10/1715).
So the soda doesn't heal the wound, but does slow the heart and bleeding temporarily (someone would have to measure the receptor mechanism to determine whether more than being out of water alone, I would think perhaps probably would). Ultimately getting the fish back in water to rest and recuperate probably the best scenario.
We can't and won't keep muskies here (54" limit) so really everything is going back including almost all pike, so really preventing the wound in the first place by care in hook/choice and removal and getting fish back quickly is priority. I have some seen some severely damaged gills over the years in healed fish, and bleeding does not necessarily mean death in all cases - interesting paper and story on chinooks here https://fishwithjd.com/2016/08/02/hook-placement-if-it-bleeds-it-die...
|
|
| |
|
Posts: 183
| Fish blood coagulates in water. Simple as that. Keep them in the net and minimize time out of the water even more so if theyre bleeding. |
|
| |
