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Re: GAR breeding and Barometric Pressures
The medical profession has no explanation for the onset of arthritic
discomfort when a storm approaches either, but they do recognize it as a
fact, even if they can neither explain it nor reproduce it in a pressure
chamber. The angling community also recognizes significant changes in
gamefish activity that is related to fronts, storms and presumably barometric
pressure effects. I can certainly understand that there is no way that I can
conceive that a lake trout 100 feet down can tell what the barometric
pressure is, but the evidence is pretty clear that they respond in some way
to change in the weather. While there is no doubt in my mind that
temperature, light and water changes have a major effect on stimulating
spawning in killifish, something else related to weather changes may also
have an effect. Jim, did your study look at correlations between just
absolute pressure reading or was it also capable of looking at pressure
deltas? It may be the change and the direction of the change rather than the
actual pressure that is the stimulus. I also wonder whether 20 pairs is a
sufficient sample size? Has any statistical analysis been applied to any of
the influences to determine significance? Use of something like JMP software
to analyze the data may be very enlightening.
Lee Harper
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