DNA sexing

[norto]

Just wondering whether it is possible to DNA sex discus? Because I have parrots also that is what is done with immature birds or birds that cannot be sexed visually.
Regards,
Norto. :?:

[ILLUSN]

birds the sex chromosomes are well known, i'm not sure that it's the same with fish, i work in cytogenetics (chromosome analysis) and i'm yet to find the discus genome anyware.

[Ben]

It is possible as i looked into it. just too $$$$$$

[ILLUSN]

is it possible to do cytogeneticly? if so cytogeneticist offering services for free

[Squid]

It can be done - but big bucks. Its much easier to maturate the fish (ie replicate the natural oncoming of the breeding season) You can then carefully insert a pippette into the fishes vent and extract either sperm or underdeveloped ova. Works better on bigger fishes

Tony Norton (Squid)

[mistakes r crucial]

That sounds painful! About the equivalent of us falling a*s end on a baseball bat, ouch!
MAC

[Squid]

Hopefully not that bad - It doesn't seen ot worry other fishes that I've seen it done to (Goldfish, trout, oscars, cichlids in general) Would have to use a fine needle pipette though - and hope they dont flinch.

Squid

[Kingkat]

Squid, We used to use a soft flexible tube on Barramundi Cod and Mangrove Jack and the like at the hatchery. It was a specially made tube with a rounded end not a square cut end. And we used to do it on crocs with our fingers!!!
Cheers,
David.

[mistakes r crucial]

With a Croc David I reckon I'd rather put my finger in that end that the other one lol!
MAC

[Kingkat]

That's true Mac but it still wasn't an enjoyable job. I preferred feeding whole mudcrabs to the groper broodstock! Sorry for off topic.
Cheers,
David.

[Squid]

Yeh David - exactly the same technique but a little harder on smaller cichlids. You can buy those blunt ended syringes etc from any good aquaculture supplier.

Squid