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#10993367 - 07/22/15 10:52 AM Watching NatGeo....
jwatts77 Offline
TFF Team Angler

Registered: 11/03/06
Posts: 3155
Loc: Texas
They were showing how a huge school of sardines can actually be so dense the sardines in the center of the school can die from lack of oxygen. I wonder if this happens to shad on our lakes? Just thinking, maybe this is why you see a bunch of dying shad sometimes. Maybe not.

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#10993572 - 07/22/15 12:31 PM Re: Watching NatGeo.... [Re: jwatts77]
upchurch_k Offline
Outdoorsman

Registered: 07/01/08
Posts: 119
Loc: Fort Worth, TX
I guess it could be possible, I've seen some of those shows too and it seems like you would have to have all of the shad in the lake converge at once to match the size of some of those balls of sardines.
_________________________
Kevin Upchurch


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#10993701 - 07/22/15 01:42 PM Re: Watching NatGeo.... [Re: jwatts77]
Fishbreeder Offline
Extreme Angler

Registered: 02/07/10
Posts: 1381
Loc: Brazoria County, Texas
Originally Posted By: C.A.S.T.
They were showing how a huge school of sardines can actually be so dense the sardines in the center of the school can die from lack of oxygen. I wonder if this happens to shad on our lakes? Just thinking, maybe this is why you see a bunch of dying shad sometimes. Maybe not.


Sometimes around here....

A large reservoir will be drained through say a 6 or 8 inch pipe for many days or weeks into a bayou or creek. Many fish will come up to the running water. If it is either turned off, or detiorates significantly in quality (close to the bottom) all those fish can die pretty quick.

Now I'm not sure if the shad can school so thick in open water to die of oxygen starvation, but they are particularly susceptible to low DO and will be among the first fish to show stress at such times.

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