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Gambusia aff. affinis vs. Gambusia aff. holbrooki: Can you tell the difference?
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Guest_ivan09193_*
, Feb 09 2007 11:54 PM
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#1
Guest_ivan09193_*
Guest_ivan09193_*
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Posted 09 February 2007 - 11:54 PM
For a research project described in a previous post (see "Hybrid Sterility in Mosquitofish"), I need to acquire specimens of the Western Mosquitofish (Gambusia aff. affinis). I have read of a similar looking species found in the eastern half of the United States (Gambusia aff. holbrooki), that would not be suitable for my project due to a radically different sex determination system. Does anyone know how I can tell the two species apart by a visual inspection. I'm willing to do anything to find out the difference (short of karyotyping) .
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#2
Guest_fundulus_*
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Posted 10 February 2007 - 11:06 AM
For a research project described in a previous post (see "Hybrid Sterility in Mosquitofish"), I need to acquire specimens of the Western Mosquitofish (Gambusia aff. affinis). I have read of a similar looking species found in the eastern half of the United States (Gambusia aff. holbrooki), that would not be suitable for my project due to a radically different sex determination system. Does anyone know how I can tell the two species apart by a visual inspection. I'm willing to do anything to find out the difference (short of karyotyping)
Oh oh, he said "hybrid". But to differentiate species of Gambusia morphologically the gonopodium can be examined, and using a dissecting scope the differences can be easily spotted. Having said that, I don't have any references at hand... but my hazy recollection is that at least one article in Copeia has described these differences.
#3
Guest_Brooklamprey_*
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Posted 10 February 2007 - 01:01 PM
Distribution of Gambusia (Poeciliidae) in a Southeastern River System and the Use of Fin Ray Counts for Species Determination (in Shorter Contributions)
David M. Walters; Byron J. Freeman
Copeia, Vol. 2000, No. 2. (May 8, 2000), pp. 555-559.
David M. Walters; Byron J. Freeman
Copeia, Vol. 2000, No. 2. (May 8, 2000), pp. 555-559.
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