On sticklebacks. In the spring I collect three spine sticklebacks when they
congregate at the outlet end of a salmon weir. The water is fairly swift and the
sticklebacks shoal together hovering over the rocky bottom. They dip in and out of
the flow. The spring is the only time I see them here. You can see the salmon
patroling out in the deeper--probably picking up stickleback stragglers. BTW I
will be collecting some in a month or two-- If you are interested in some for a
trade of some sort let me know.
R3
"Hoover, Jan J WES" wrote:
> There was an interesting thread recently regarding sticklebacks. The gist
> was, I think, that they were a slow-water species observed in low-velocity
> microhabitats in higher velocity macrohabitats. Discussion involved the
> adavantages/disadvantages of a weak swimmers inhabiting slow water boundary
> layers in swift water. So, how fast can a stickleback swim?
>
> A few days ago, I was flipping through a 1954 book by Frank Lane titled
> "Nature Parade." Lane had a chapter on fish swimming abilities and compiled
> a table of "fastest reasonably authenticated" speeds for a group of 40
> fishes and fish-like organisms. The stickleback (Gasterosteus) was listed
> as the 6th slowest and its speed, measured with a stopwatch, was listed at
> 6.8 mph. This doesn't sound fast but if my math is correct, it is
> equivalent to 299 cm/s! This would be pretty fast for a small fish. Burst
> speeds (highest attainable speeds) measured under controlled conditions for
> juvenile sturgeons, salmonids, and a mackeral are substantially lower:
> 50-150 cm/s. Lane's rankings seem right, though, suggesting that the older
> field-measurments of fish speed were inflated but when compared among taxa
> were relatively correct.
>
>
>
>
>
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