Dead Bass at the Backyard Pond! Time for an Investigation
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- เผยแพร่เมื่อ 21 พ.ย. 2024
- We have a dead bass at the backyard bass pond. I need to find out what happened to this largemouth bass. Winter kill? Lack of oxygen under the ice? Starting the pond aerator too early? Too late? Did the fish eat something bad? Too much late winter pond aeration, or not enough oxygen? Did I have the diffuser too low at the pond bottom? Could that be what killed this fish? In order to get to the bottom of this, I cut the dead fish open to see what's inside. I need to figure out what happened to this fish so that I don't have the same problem happen to any other fish and bass in the pond.
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i have experienced that same problem several times. large older bass don't like beeing moved from one body of water to another. they have more trouble adapting to a new environment than younger fish. sometimes it went well for the first couple months, but tipically the next winter they were floating dead.
my conclusion: the younger/smaller the fish you move, the lower the mortality.
I may have been overthinking it. That makes so much sense, and I never even thought of that.
Hi. To Be clear, the pond completely iced over right? No degassing holes, no aeration for a duration? The largest fish have the highest oxygen demand, first to go. I would guess your largemouth died and you found it floating later as bacteria and such started taking action and the fish went from the bottom to the top. As your fish respirate the take oxygen and add CO2 into The water column. A sealed system Traps the gasses and allows very little exchange and no new Oxygen. The biological process takes oxygen(aerobic bacteria must have it to break down waste), the bacteria in the pond, the algae, the fish and insects all take it from the water column. CO2 and other gasses will build in the water column and your PH may decline if the GH/KH of you pond is minimal(opposition to acids). The entire biological process, fish and animal life create waste, ammonia , CO2 etc. and converts ultimately to hydrogen sulfide, methane, nitrogen and other non life loving things. The oxygen pump
You were using was shut off. The bacteria this supported would begin to start dying off to a smaller number which in turn reduces the carrying capacity of your system. When it gets cold the entire system slows down but does not stop, suddenly stopping the air support and not degassing will stress your system. If you leave a hole on the end of the pond and continue to aerate this would allow degassing and offer additional O2 to the system which would have likely given you the balance you need. A few notes: the bubbles you see on the bottom(not O2) are generally from anaerobic bacteria giving off gasses such as hydrogen sulfide methane etc.. These bacteria live in lower oxygen zones and break down nitrates and release gasses. The minnows with white patches are showing clear system stress and this fungal/ bacterial symptom is their immune system being challenged. I think the whole problem is rather simple, the more oxygen in the upper water column the better, the more vapor exchange(degassing) the better. This process supports more beneficial organisms and reduces stress on a system. Hope this gibberish helps.
That's a lot of great info, thanks for the detailed explanation.
I empathize with you for losing the bass but the autopsy was really funny.
Did not enjoy the process.
My first guess is ... a lack of oxygen in the pond for a fish that large.
Thanks
You may need more aquatic plants
Thanks, I think you're right. I'm going to work on that this summer.
@@ryanhoelke
I hope it works.
It's definitely not good to lose fish.
Fish Detective?
Has a nice ring to it