[AT] OT- Fish Kill

[Bob McNitt]

Warren -

I'm sure aeration would help, but it sounds as though you've 
accumulated/grown too many fish for the pond's cu. ft. of oxygenated water 
to support them all, so periodic die-offs are inevitable. We have a 5-6 acre 
private pond full of small sunfish, perch & bass about a mile from us, and 
every year--usually right after ice-out or in mid summer, or both, it 
experiences a die-off, but enough fish remain to keep the cycle going. 
Unfortunately all the fish species are increasingly stunting.

----- Original Message ----- 
From: "charliehill" <charliehill at embarqmail.com>
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
Sent: Sunday, March 15, 2009 8:59 PM
Subject: Re: [AT] OT- Fish Kill


>I remember reading something about pond water doing a sort of inversion in
> certain temperature conditions such as a change of seasons.  The inversion
> causes a layer of oxygen depleated water that kills fish.
>
> We have fish kills here in our rivers on still, hot summer nights because
> the oxygen level drops.
>
> Either way an aereator would help as someone else mentioned.  Just a 
> simple
> pump pulling water out of the pond and spraying it back in would probably 
> do
> some good.
>
> Charlie
> ----- Original Message ----- 
> From: "Bob McNitt" <nysports at frontiernet.net>
> To: "Antique tractor email discussion group" 
> <at at lists.antique-tractor.com>
> Sent: Sunday, March 15, 2009 8:18 PM
> Subject: Re: [AT] OT- Fish Kill
>
>
>> Warren -
>>
>> Having worked with fisheries pros over the years in my outdoor editor
>> capacity, I'd guess the abundance of dying vegetation depleted the
>> dissolved
>> oxygen, and because the density of sunfish was so high, many just
>> suffocated.
>> Bob in CNY
>>
>> ----- Original Message ----- 
>> From: "Mogrits" <mogrits at gmail.com>
>> To: "Antique tractor email discussion group"
>> <at at lists.antique-tractor.com>
>> Sent: Sunday, March 15, 2009 6:38 PM
>> Subject: Re: [AT] OT- Fish Kill
>>
>>
>>> The "blue dye" John Hall mentions is copper sulfate and we've used it
>>> in the past to kill vegetation in the summer months. The pond never
>>> freezes over hard in winter but it did freeze a couple times this
>>> winter.
>>>
>>> I've googled and the verdict for winter fish kills is decaying
>>> vegetation. Nothing to be done about it really, unless I did some
>>> emergency aeration with pumps and diffusers. It fits the bill- there
>>> is a lot of grass decaying right now that's never been there before.
>>>
>>> We use no pesticides or fertilizers that could come into play here- I
>>> hesitate to even use roundup nearby if there's any threat of rain.
>>>
>>> Luckily, the kill seems to be the smaller bluegill and no largemouth
>>> bass. We are overpopulated with bluegill anyway and they are stunting
>>> the bass. Besides smelling bad for a few days the biggest downside is
>>> keeping my yellow lab from retrieving the rancid carcasses and
>>> bringing them to the doorstep.
>>>
>>> On the plus side, if the snapping turtles do their job this could be a
>>> big summer for turtle stew.
>>>
>>> Warren
>>> _______________________________________________
>>> AT mailing list
>>> http://www.antique-tractor.com/mailman/listinfo/at
>>
>>
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