How can you tell a male fish and a female fish apart?

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Offline Simulated

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Just wondering ha

Thanks Sim  [:)]

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Offline Simulated

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How can you tell a male fish and a female fish apart?
« Reply #1 on: 28/04/2008 01:47:20 »
Anybody a fishy person? Ha that's a funny

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Offline Simulated

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How can you tell a male fish and a female fish apart?
« Reply #2 on: 17/05/2008 12:59:47 »
Anyybodyy?

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Offline neilep

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How can you tell a male fish and a female fish apart?
« Reply #3 on: 17/05/2008 13:40:52 »
The female fishes are the ones wearing bras,

The male fishes are the ones getting stressed at the credit card statement !!, oh, and they have hairy gills too !!  [;)]
Men are the same as women, just inside out !

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Offline neilep

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How can you tell a male fish and a female fish apart?
« Reply #4 on: 17/05/2008 13:42:06 »
Good question though matey !...I am sure the answer will come soon !!...but remember...the weekend here is ' quiet time '
Men are the same as women, just inside out !

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Offline Simulated

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How can you tell a male fish and a female fish apart?
« Reply #5 on: 17/05/2008 14:14:01 »
Ha, thanks Neil. Wow. Ha

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blakestyger

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How can you tell a male fish and a female fish apart?
« Reply #6 on: 27/05/2008 21:56:30 »
Many fish posses sexual dimorphism so that's easy - but many, such as Clupids (Herring family), do not so they have to be taken apart in the laboratory.

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Offline turnipsock

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How can you tell a male fish and a female fish apart?
« Reply #7 on: 27/05/2008 23:52:17 »
That is an easy question. The males have one x and one y chromosome and the females have two x chromosomes.
Beeswax: Natures petrol tank sealant.

When things are in 3D, is it always the same three dimensions?

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Offline Simulated

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How can you tell a male fish and a female fish apart?
« Reply #8 on: 28/05/2008 00:10:38 »
Well, without testing that kind of stuff. Can you just look at it?

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blakestyger

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How can you tell a male fish and a female fish apart?
« Reply #9 on: 28/05/2008 09:20:00 »
Interestingly,fish sex chromosomes are not the same as the XX and XY setup that humans have - it's more complicated than that.
In the Swordtails for instance there are three types of sex chromosome: X,Y and Z but each individual has only two of these. That is, there are no XYZ or XXY etc,.
A fish carrying a Z will be female otherwise if it carries a Y it will be male. A Z always trumps a  Y and there can be no ZZ, so there are several possibilities:

YY, YX and YZ are female.
XZ, XX and YY are male

Out of interest spiders are quite complex too, males are either XXX or nothing and females are XXXXXX