poodoo wrote:was a broken swimming pool so just had water some water plants, no aeration in it.
And as you mentioned, they were just fingerlings. Stocked trout in lakes are a bit larger and advanced than fingerlings and use more oxygen.
Those plants alone in the pool would of been providing plenty of oxygen, food (mozzies, dragonflies and so forth lay larvae on water plants), and working as a filter also as the plants feed on/absorb the fish poo water too.
So long as the pool was kept at a depth, so the plants didn't die, and the water didn't get too warm, then that would of been plenty enough for the fingerlings to live a few seasons.
With a lot of the smaller lakes, some of them don't even have the depth of an average swimming pool, and the plants die off also due to low very low oxygen levels (even though they do produce a lot of oxygen , they still need some to live !), also the low water levels exposing the water plants to too much sunlight kills them off, which also the fish feed on, then also with the larger fish taking the oxygen too (what's left of it as the plants creating the oxygen die off), everything pretty much dies off. Then it all goes stagnant and green algie weed grows everywhere.
This happens in a lot of the smaller stocked lakes each year , until the lakes are refreshed with new rainfall to clean and oxygenate the water again.
Even rainfall breaks the water surface , oxygenated rain water and also dragging more oxygen into the water from the air as the rain hits the surface. Like a waterfall constantly oxygenates the water, or running waters breaking the surface to oxygenate the water. Smaller lakes and dams can become stagnant very quick if water levels drop / plants die / and not enough rainfall drops to refresh them.
Unlike rivers and streams which have constant flowing water, rapids and so forth , creating breaks in the water surface drawing in oxygen.
The bigger birds are definatly onto the stocked lakes these days too !, I've seen plenty of big birds around stocked lakes taking the stocked trout. I witnessed 1 bird alone take around 6 trout with a few minutes, surfacing while gulping down the fish. Bugger, took more than his bag limit !.
:lol: lol.
There has been a lot of smaller lakes that have missed out on re-stocking some seasons due to all the above.
DPI do list some of the lakes that don't get a restock due to problems, but personally I don't think they are listing them all.
A lot of the lakes are in really bad condition this year , not producing , and not only myself , but others also questioning if some of the lakes have even been restocked again this year.
Cheers , Rick.
thanks for the confidence poodoo