Hormone Induced Spawning???

[Fishes33]

This is a little section that I came across on the web...

Why cant we do this to the ST?

Hormone induced spawning

The use of hormones to induce spawning in fish is a strategy rarely used by fishkeepers, and should only be attempted by trained professionals.

Hormone induced spawning is widely used in aquaculture and by many commercial fish farmers to allow them to spawn difficult fishes that would otherwise be very challenging to breed; a range of difficult-to-breed fish species sold in the aquarium trade are believed to be produced in this manner.

and so on and so on...

Do you think by injecting of GnRH analog with dopamine antagonist and injection of gonadotropin can trigger a ST to spawn?

 

[JD7.62]

It should, and Ive done TONS of research on it. Hormone breeding fish is pretty simple and straight forward. I was going to do it with a buddy of mine who has a lab and does this stuff for a living. I was even invited to work with Kentucky State University's fisheries program for the experiment.

Problem is finding mature STs. Females do not produce eggs untill they are about 18" and nearly 5 pounds in weight!!! Good luck finding a mature ST in N. America.

Also you cant just inject the fish and hope it is mature. If you do, and the fish is not mature, you can permanently retard the fish's sexual maturation.

*waits for T1s smart ass remarks*

 

[Fishes33]

It should, and Ive done TONS of research on it. Hormone breeding fish is pretty simple and straight forward. I was going to do it with a buddy of mine who has a lab and does this stuff for a living. I was even invited to work with Kentucky State University's fisheries program for the experiment.

Problem is finding mature STs. Females do not produce eggs untill they are about 18" and nearly 5 pounds in weight!!! Good luck finding a mature ST in N. America.

Also you cant just inject the fish and hope it is mature. If you do, and the fish is not mature, you can permanently retard the fish's sexual maturation.

*waits for T1s smart ass remarks*

Milokai got a 18" ST

What do you mean by permanently retard the fish's sexual maturation? Many things can breed prematurely, and they get the damage too? Eg. Human can have baby as young as 14 and also convict (fish) can mate at a very young age as well. im a bit lost here

 

[JD7.62]

Lots to learn my friend. It sounds like youre a little behind on the biology curve. No offense but if you think that a human at 14 (even 10 year olds can have children) that has had a baby isnt sexually mature then you need to give up on this project.

If an animal can produce offspring then it is obviously sexually mature. In other words a fish or a human isnt producing offspring if its not sexually mature.

The hormones used could permanently damage the processes that takes place to make the fish sexually mature if used too early.

ETA - if you made the fish not mature sexually its possible you will end up with a MEGA giant ST.

In the fisheries industry, most food fish are bred to be sterile, this is because the fish uses less of its resources into sexual maturation and more into growing. The end result is a larger, more marketable fish for the table.

A couple examples are tilapia, they are all sterile males. Here in KY freshwater shrimp farming is pretty big and that is because our climate is warm enough to grow the shrimps but not warm enough for them to breed so that means the shrimp grown here grow very large compared to areas where they are grown and bred out.

 

[krichardson]

I cant believe that this hasnt been attempted or at least looked into here or in Asia,especially with all of the other things that have been done such as the hybridizing of catfish and cichlids.

 

[Fishes33]

ETA - if you made the fish not mature sexually its possible you will end up with a MEGA giant ST.

8.5" and 11" atm

I want some MEGA size ST!!! How about I provide you the fish, and if they breed, its 50/50 (baby) share with u

 

[VVateverzYo]

If i remember correctly from older post people in asia did get them to breed the problem was the baby did not survive

 

[krichardson]

Was this breeding by hormone injection or natural process?

 

[masone]

I believe they did trials in Thailand. These were published in 1994, I'm sure I've seen a more recent paper, like VVateverzYo said, the biggest issue was raising fry. Will see if I can hunt up the studies in full if anyone is interested.

Natural breeding of Siamese tigerfish Datnioides microlepis Bleeker

Natural breeding of Siamese tigerfish, Datnioides microlepis Bleeker was conducted at Nakhonsawan Inland fisheries Development Center, during December'1991 to July'1992. The parents were stocked in 5 cement ponds of 4 square m at the water depth of 90 cm, both stocking rate and sex ratio was arbitrarily allocated according to the samples at hand. The water and aeration were circulated all time. The broodstocks were fed with small alive fish and 2 month before spawning period, the preys were injected with 200 I.U. of Vitamin E/kg. Natural spawning occur in March'1992 embouyant eggs were hatch within 15-17 hours and the yolk was absorbed in 2-3 days. The larvae were fed with hard boiled yolk eggs with powder spirulina, Rotifer, Moina., small shrimps and fish frys respectively. The total of 230 fish fingerings with the age of 4 months were obtained.


Breeding and nursing of Siamese tiger fish, Datnioides microlepis Bleeker

Breeding and nursing of Siamese Tiger Fish from Maekong River was carried out 5 time at Mukdharn Fresh Water Fisheries Station by hormone injection, Twenty-Seven brooders (9 females and 18 males) were injected in two time. The first time using extracted hormone, 10 micrograms of Suprefact mixed with 10 milligrams of Motilium were injected per kilogram of body weight for female and 5 micrograms of Suprefact mixed with 10 milligrams of Motilium were injected per kilogram of body weight for male. And 18-20 hours later the second injection were done by using 30 micrograms of Suprefact mixed with 10 milligrams of Motilium for female and 10 micrograms of Superfact mixed with 10 milligrams of Motilium for male. After that the brooders were allowed to spawn themselves after injection. The results showed that all brooders could not spawn.

 

[Fishes33]

Reading a little of that section from masone

Now it all seems IMPOSSIBLE, back to the drawing board

OR

could CLONING work?

take the ST tissue or WHATEVER they're called and inject into "OTHER KIND" of fish's egg?

Just like the GLO-Fish gene comes from some sort of jellyfish..

Possible?

Hmmmm...