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Re: Sex Ratio "Experiment"
Doug Karpa-Wilson wrote:
> I'm thinking that there's a lot of ideas about what controls sex ratios out
> there, and lots of us would like to know!
> So, I was thinking we should do an experiment together, or rather collect
> data on the experiments we are already doing.
> What I'm proposing is that volunteers do a few extra things to collect data
> on the fish they are breeding and the resulting sex ratio and send the data
> to me. If there's a big and obvious pattern it should fall out
> statistically in a hurry.
> Here's how it'd work:
> First, folks collect easy to collect data on hypothesized factors:
> mostly temp, pH, any others?
> at different times in their breeding process:
> spawning, incubation, hatching and say, 2 weeks of age.
> and lastly,
> sex ratio.
> Then send the info to me, and I'll do my best to pull out whatever patterns
> I can from what data I get.
> Any thoughts before we start this?
Worth a good literature search, first, as it has been done a lot already.
What affects the ratio in one species often is not the same as in another,
and in some is influenced by very subtle differences not easy to measure.
How else does one explain the late Paul W.'s success in fixing Rivulus sex
ratios by raising two per shoebox and virtually *always* getting pairs?
Wright Huntley, Fremont CA, USA, 510 494-8679 huntleyone at home dot com
"Ignorance creates a fertile climate for demagogues;
maybe that's why politicians give so much support to
the public education establishment."
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