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a thread for thinkers...

Started by Guest_Auban_* , Apr 27 2013 02:15 AM

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3 replies to this topic

#1 Guest_Auban_*

Guests

Posted 27 April 2013 - 02:15 AM

ok, so, here is my dilemma: i have a fish that has been spawned many times in captivity, and yet nobody has been able to keep the fry alive in captivity. i have set my sights on this fish, and will continue to work with it until i have solved the problem. after that, ill probably just let everyone know what worked and will then move on to another challenge.

anyway, the fish in question is the empire gudgeons(hypseleotris compressa). i have the fish, and it seems that they are approaching breeding age, so i need to formulate a plan. since no hobbiest has ever raised them successfully in an aquarium, any and all new ideas are valid. i don't care how crazy it is, if it makes even a little bit of sense, ill try it. who knows, maybe you can be the person who came up with the idea that cracked the code of the empire gudgeon.
what i need is any and all ideas for raising empire gudgeon fry. this is a thread for free thinkers, those who like taking a theoretical problem and trying to solve it with thought alone.

so, any thoughts as to why nobody has been successful with this fish?

i know this has nothing to do with native fish, but if i can find out what this fish needs, i may be able to apply that to other fish. personally, i don't find any information to be useless, regardless of how inconsequential it may seem to be.

Edited by Auban, 27 April 2013 - 02:17 AM.

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#2 Guest_Subrosa_*

Guests

Posted 27 April 2013 - 06:01 AM

It seems likely that some sort of salinity manipulation is at least part of the trick. The fry probably require saltier water than the adults.

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#3 Guest_EricaWieser_*

Guests

Posted 27 April 2013 - 07:18 AM

I agree with Subrosa.

so, any thoughts as to why nobody has been successful with this fish?

They try to raise the fry in fresh water.

If there's one thing I've learned from NANFA, it's to observe fish in their native habitat. This is especially important for replicating spawning conditions and when rearing fry. Dave from http://www.rainbowfi...c.php?f=2&t=127 said, "Here in the coastal top end rivers particularly the Darwin, Daly and Howard you can see large scale H.compressa fry migrations heading upstream from about April to July after the wet season flooding is finished." Based on that, it seems the fry need increased salinity to survive well because in the wild they get washed downstream towards the ocean. They only return to freshwater afterwards.

Edited by EricaWieser, 27 April 2013 - 07:21 AM.

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#4 Michael Wolfe

Board of Directors

North Georgia, Oconee River Drainage

Posted 27 April 2013 - 07:44 AM

I'm sorry, while I certainly appreciate the free thinking aspect of the conversation, we have to stick to our mission here. While this thread may in fact be interesting, so are a lot of other topics to a lot of other people. This has to be the Native Fish Forum. This thread is locked and will be deleted.

Either write something worth reading or do something worth writing. - Benjamin Franklin