Gender determination? - Tropical Fish Keeping - Aquarium fish care and resources
 
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post #1 of 1 Old 02-01-2012, 12:16 PM Thread Starter
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Gender determination?

Ok, so I know how to tell makes and females apart, lol. That's not my question. I am curious about how livebearers get their gender. I know some fish decide on gender after seeing who is dominant and then a certain ratio of males to females develops. Is this the case with livebearers? Or is it genetically based from the start? I have noticed on my platy fry that they all look female for a while. Then after about 2 months, some start looking like males. And it seems to be in a ratio closer to 2:1 or more than 1:1 like it would be genetically. It's consistently more females than males. When I search online, I only ever find how to differentiate between genders.

Anyone know for sure?

Tanks- 55 gal(in progress)-Common pleco, Angels, lemon and rummynose tetra, blue rams; 29 gal planted- rasboras, corys, otos, clown plec, shrimp; 10 gal- juvenile goldfish; 6 gal planted- betta

Other Pets-Maggie(Tricolor Paint Mare),
Lily(Sun Conure), Zoe and Melina(Budgies), Leonardo- Bearded Dragon, Pilot and Phoenix(Golden Retrievers), Beckham(german shepard/akita), Myrtle and Richard(hermit crabs)

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