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Re: [Killietalk] Research projects
I like the idea of sex determination through environmental factors. I
can see how this might take extra time, but I could also see how this
could be an ongoing research projects for other students to pick up
the following year.
I have also thought about having them test how several different
environmental factors effect egg production.
The research doesn't necessarily have to e ground breaking or even
new as the experience is the most valuable part. They do have the
opportunity to submit their research to a national competition.
Next year will be my first year working with these students. I hope
to work out as many issues as possible before hand.
Thanks for the input,
On May 6, 2008, at 7:17 PM, Bill Martin wrote:
> Hi Jeremy,
> At 10:36 AM 5/6/2008 , you wrote:
>> I was hoping to get a few ideas on some research projects that I
>> could have some of my students work on at the high school level.
>> These would be juniors and seniors and they would have 6 to 8 months
>> to start and complete their projects. This is an open topic
>> scientific research class, where most students lean towards physics
>> or chemistry. I would like to boost the biology side of things, and I
>> think killifish would be a great model specimen. I am trying to think
>> of a few possible ideas that I could use to help get them started,
>> then let them run with it.
> I have lot?s of ideas for research projects for fish. Not many can
> be done
> with killifish and some involve physiology, some genetics and quite
> a few
> on fish behavior. Some would involve little more than effort while
> in the right hands could win money for college. My feeble attempt at
> influencing the sex of swordtails before they were born with methyl
> testosterone was enough to get me into the semifinals of the
> (now Intel) Science Talent Search and paid for a substantial
> portion of
> four years of college. Years later some very similar research
> succeeded in
> producing 100% males that were fertile and led to the rewriting of the
> genetics of sex determination especially swordtails and platies.
> The idea for killifish is similar to the one already mentioned.
> But trying
> to influence sex through pH, temperature or another environmental
> will probably involve too much time and work. I once lost all my male
> gularus and was left with four females that all had previously
> spawned for
> me. I kept them in the same tank and after six weeks, one started
> to morph
> into a male and actually spawned with the others. Using methyl
> testosterone, try to induce sex reversal in female killifish that had
> previously produced eggs. You can be sure that you will get some
> effects but the real test is breeding the treated females back to
> females and looking for fertile eggs. You can extend it to
> the sex ratio of any fry you get.
> I suspect that within several months you would succeed in producing
> fry and
> in six months get a 50/50 sex ratio fathered by a fish that at one
> produced eggs.
> Email me if you want more ideas regarding angel fish genetics,
> behavior or inter species reactions.
> Bill Martin
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