PDA

View Full Version : Pregnant Amano


chem
Feb 6th 2008, 12:39 PM
It would appear that one of my Amanos is pregnant. Not really interested in breeding them but I thought it was cool. She hides at the back of the tank so sorry for the calcium stains. I guess the larvae will only survive in brackish conditions.

http://i167.photobucket.com/albums/u150/jrschem/100_1107.jpg

DaFishMan
Feb 6th 2008, 01:56 PM
I guess the larvae will only survive in brackish conditions.

True, sea-salt is needed for better development of the eggs plus the larvae won't live past the free-floating to crawling stage without it. Nice pic though. My Amanos have had eggs several times, no larvae ever seen.

This may be of some help, about 2 tspn per gallon seasalt to a 10g tank according to this link. http://www.gsas.org/Articles/1999/shrimp2.html Good luck :)

Melody
Feb 6th 2008, 02:45 PM
Great pic!

zapisto
Feb 7th 2008, 06:26 AM
True, sea-salt is needed for better development of the eggs plus the larvae won't live past the free-floating to crawling stage without it. Nice pic though. My Amanos have had eggs several times, no larvae ever seen.

This may be of some help, about 2 tspn per gallon seasalt to a 10g tank according to this link. http://www.gsas.org/Articles/1999/shrimp2.html Good luck :)

salt/brakish water is need only and only after hatching
larva can live for 24 to 48 hour in freshwater no problem , but after that they need to be migrate to salt/brackish water for developpement.
dont add salt with the adult (even if she will support it really well, and actually can live in salt water).

Melody
Feb 7th 2008, 08:34 AM
Always great to learn from everyone's experiences. I'd try both ways to find out what works best, personally. That's why I like to know all of my options. Thanks for the input everyone!

Soggybottom
Feb 8th 2008, 05:16 PM
I looked into trying to breed these guys too. The way I read it was that the eggs hatch in the normal freshwater habitat and the larvae are washed downstream to brackish waters. There they forage and begin working their way back upriver as they develop.

Melody
Feb 8th 2008, 05:37 PM
If we can't move Shrimp holding eggs because they often drop them and finding the babies would be very difficult, let alone moving them without injuring them... wouldn't it be easier to just let the female 'lay' in high salinity if they handle it ok? I haven't a clue, I'm just wondering how it can be a feasible idea.

DaFishMan
Feb 9th 2008, 10:38 AM
I don't really know either. I know it's easy to buy them, $3. each and very resilient to various tank conditions.

When I slid my tank lid back after a year of ignore, one grabbed my shirt, the 2nd slapped me upside the head, the third did a 'Pfft' sound, jumped out and headed for the fridge... returned to the tank with 3 beers and the rest of my pizza :confused:

Soggybottom
Feb 9th 2008, 10:41 AM
Someone will have to try! I traded my amanos for cherry shrimp.
I wonder how stressful it would be for the expectant mother, especially if the transition was quick. Maybe a saline drip into a wee little birthing tank would be best...maybe the salt would induce labour! :smile:

Melody
Feb 9th 2008, 10:44 AM
I don't really know either. I know it's easy to buy them, $3. each and very resilient to various tank conditions.

When I slid my tank lid back after a year of ignore, one grabbed my shirt, the 2nd slapped me upside the head, the third did a 'Pfft' sound, jumped out and headed for the fridge... returned to the tank with 3 beers and the rest of my pizza :confused:

:rofl: Well, Mr. DaFishMan, I've never heard of that happening... but it doesn't mean it didn't happen to you. Otherwise, I'm sure there are support groups.... :wideeyed:

Melody
Feb 9th 2008, 10:47 AM
Someone will have to try! I traded my amanos for cherry shrimp.
I wonder how stressful it would be for the expectant mother, especially if the transition was quick. Maybe a saline drip into a wee little birthing tank would be best...maybe the salt would induce labour! :smile:

It makes sense to me that it could help with egg development actually, or at least a high mineral environment might be the ticket. I suppose you could remove her when you see her drop and then increase the salinity gradually but as was mentioned, at $1-3 each it would be more practical to buy them unless its the challenge you're after.

Why must these creatures complicate matters for us anyway? We have the best of intentions!:rolleyes:

zapisto
Feb 9th 2008, 11:47 AM
If we can't move Shrimp holding eggs because they often drop them and finding the babies would be very difficult, let alone moving them without injuring them... wouldn't it be easier to just let the female 'lay' in high salinity if they handle it ok? I haven't a clue, I'm just wondering how it can be a feasible idea.

in fact melody , i recommend and highly recommend move the female to a separte tank as soon as you see she have egg (somewhere in the first week of berried)
this way you reduce to close to zero the risk she drope the eggs.

the fact adult amano can leave in brackish water mess up a bit some people.
let me tell what my experience give me about that.
first of all dont forget you will have to migrate not only the female but some male also. because moving the female berried to saltwater does not make any sens for me since you will apply 2 stress (the move + the migration to salt versus just move )

and my observation show, that, female in salt water have less often eggs than female in fresh water.
i breed them so i take 2 group of my own shrimp and separate them one group in salt one group in fresh to arrive at this observations.

Soggybottom
Feb 10th 2008, 10:53 AM
So seeing a berried female doesn't mean she is fertilized yet?
I thought once they were under the body they were good to go...

zapisto
Feb 10th 2008, 11:48 AM
So seeing a berried female doesn't mean she is fertilized yet?
I thought once they were under the body they were good to go...
most of the time in the first 24/72 hours the female will frop the egg if they are not viable.