when the water settles the larger fish have gone but smaller fish remain. Do they go away intentionally using the higher water or can they not hold their position and get swept away?
2006-10-15 09:50:09 · 6 answers · asked by Stanleymonkey 2 in Environment
Larger fish tend to swim in deeper water, while smaller fish stay near the shore, where the currents aren't as strong. Chances are, the larger fish don't come into your garden, and if they do, they are able to move away to deeper water before getting stuck.
2006-10-15 09:52:18 · answer #1 · answered by Amanda R 4 · 0⤊ 1⤋
The smaller fish remain for a simple reason: they are small.
As the river swells, the smaller fish are dispersed easier than the large fish in the same manner that when a river floods, sand is deposited nearest the shore and silt is deposited the furthest away. As the water level rises up your yard, the smallest fish can make it the closest to your garden because the water level allows them to. The larger fish need deeper water to swim farther into your yard than the small fish. If the fish are forced up into your yard, it would take a stronger current to force a larger fish than the smaller one.
2006-10-15 17:43:45 · answer #2 · answered by Anonymous · 0⤊ 1⤋
This is really a great question, and a very interesting observation.
My guess is that the smaller fish are able to hide behind obstructions and rocks in the stream, and avoid being swept away, while the bigger fish are pushed downstream by the fast current.
I don't agree with the example of the salmon. It's true that they swim upstream against strong currents. But its also true that in order to do so they have to use up a tremendous amount of the energy they have stored in their body over their life in the sea. They don't stay in extra strong currents all their lives...
2006-10-15 11:06:23 · answer #3 · answered by matt 7 · 0⤊ 1⤋
As the water settles (do you mean the level drops?), the smaller fish can swim in the shallow water and sometimes get trapped in the pools that get isolated as the water level continues to drop. The larger fish can hold their position if they wanted to. If you've seen the pictures of salmon swimming upstream against very strong currents, it is clear the fish are capable of holding position against the flow.
2006-10-15 09:56:09 · answer #4 · answered by ramblingmuscrat 2 · 0⤊ 1⤋
Maybe Im dense, but I dont actually understand the question. If its a river then surely all fish can swim where they want to. If the same question was regards a lake I would get it....
2006-10-16 01:51:14 · answer #5 · answered by huggz 7 · 0⤊ 1⤋
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2016-10-02 08:03:31 · answer #6 · answered by kuhlmann 4 · 0⤊ 0⤋