PlanetCatfish.com

Can anyone sex this L082

Maybee it would be easier if you rounded up all three fish for detailed photographs. It is always easier to sex fish when you can compare several fish.

Haven´t had the luck of a photo-option of all 4 jet, but ofcaurse you are right.
/Svend

The chance of having 4 of the same sex is 0,5x0,5x0,5x0,5=0,0625%. I think I will let time tell if they will mate.

/Svend

danishcatfish wrote:The chance of having 4 of the same sex is 0,5x0,5x0,5x0,5=0,0625%. I think I will let time tell if they will mate.

/Svend

That is, assuming to external influences on sex choise are around

Unfortunately, quite a few species (life bearers, cichllids) are known which are vulnerable

Remember, the well know XX - female XY - male sysetem is only around in mammals. Birds have XX /X[] (thus nothing) but other vertebrates have no sex chromosomes, they get male or female depending on a lot of causes, some internal, some external

Yes - in teory

There could also occurre bias from caching. Males are easyer to cach becaurse they stay in the caves. Maybe on a ration 4:1 male:female.

But still - it is stressfull to cach them a eksamen them with closeup photoes. I rather trust i luck.

/Svend

danishcatfish wrote:Yes - in teory

There could also occurre bias from caching. Males are easyer to cach becaurse they stay in the caves. Maybe on a ration 4:1 male:female.

/Svend

As I have same 10 wild caught Ancistrus, I hope your estimation is right. However, I do share your analysis, that catching the fishes in the wild sometimes has a large influence:

Ancistrus males stay on their turf (read stone) females mostly don't
I once read an explanation why Bitodomas (a cichlid) are so hard to breed: Young males are said to preferr swallow waters, while females prefer deeper water

The Indians catching them, naturally only collect swallow water - hence only males get exported