yamatoes breeding tips

[qwe123r]

hmm.. mine are wormlike and white.. i think the picture shows it yamato right after it has metamorphosised.

[kc]

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On 10/30/2003 11:59:27 PM

hmm.. mine are wormlike and white.. i think the picture shows it yamato right after it has metamorphosised.
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Qwe123r,
I still think yours are not yamatos as they hatches almost immediately, usually the next morning and look like their parent except that they are so small, it is very difficult to see. They start swimming or hopping, jumping immediately.

You can try the following experiment.
Select a female with lots of eggs which are not black in colour but slightly translucent with a black dot in the centre). Monitor her closely. If she starts scratching her tummy, it mean she is releasing her eggs bit by bit.

Put her into a breeding trap inside the same tank make sure the trap is ver close for viewing. Add some moss or plant inside and close the trap as she can claw or jump out.

The poor mother will be so frighten, that she will dispel most of her eggs if not all the next morning and you can see the fry immediately. Unfortunately, most of the eggs that are not ready for hatching will dies and turn moldly.

Cheers!

[kc]

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On 10/30/2003 11:59:27 PM

hmm.. mine are wormlike and white.. i think the picture shows it yamato right after it has metamorphosised.
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Qwe123r,
I still think yours are not yamatos as they hatches almost immediately, usually the next morning and look like their parent except that they are so small, it is very difficult to see. They start swimming or hopping, jumping immediately.

You can try the following experiment.
Select a female with lots of eggs which are not black in colour but slightly translucent with a black dot in the centre). Monitor her closely. If she starts scratching her tummy, it mean she is releasing her eggs bit by bit.

Put her into a breeding trap inside the same tank make sure the trap is ver close for viewing. Add some moss or plant inside and close the trap as she can claw or jump out.

The poor mother will be so frighten, that she will dispel most of her eggs if not all the next morning and you can see the fry immediately. Unfortunately, most of the eggs that are not ready for hatching will dies and turn moldly.

Cheers!

[CoryDorus]

Don't worry, my Yamato has also offloaded some eggs i think becoz I am seeing worm like creatures on the breeding glass now. So you are not alone ...

[:0] []

[CoryDorus]

Ok ... here's some update. Seems like a few of the worms morph into a something like a very tiny version of another stage of "larvae". There is some legs like that but still doesn't look like the parent yet.

[eric_kclee]

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On 11/1/2003 1:33:14 AM

Don't worry, my Yamato has also offloaded some eggs i think becoz I am seeing worm like creatures on the breeding glass now. So you are not alone ...

[:0] []
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Hi, qwe123r and CoryDorus,

Both of you describe it as worm like....do you guys mean Worm as in Earthworm...that is round and slim and wiggle alot?????

Mine is also white but not worm like.... Mine is 'SLUG' like...slug as in seaslug alike....It is like snail without the shell...when it glide it also glide like snail....when it glide on the glass infront of the tank....its body is also like snail...elongated and with sharp ending trail...except it is thin and flat to the glass.

Can you guys confirm these sighting???

I remember seeing this slug 1 or 2 weeks before I spotted the tiny shrimp...I even thought they are slug a killed a few of them....[]

[CoryDorus]

Yes. Similar to what you have described. Can't really see it flat becoz it is so tiny.

[qwe123r]

yup thats how mine looks like too! some of them also seem to have entered the pupa stage haha so it looks like i only have at most afew more days before i can comfirm they are yamatos [:]

[gnome]

Okay - my Yamato nauplii do not match any of the descriptions here. Mine look like small, thin slivers of glass that "bob" in the water for the first few days (occasionally twitching or jerking). They gravitate towards the light. None of them "glide" on the glass at all. After a few days, they can "perch" on the glass surface, but they stay very still as if adhered to one spot. Otherwise, they are floating around in the water, head-down. When they become more active swimmers, they will propel themselves "backwards" or tail-first. They do not resemble adult Yamatos by any means. They must go through many stages in their development before finally reaching adulthood, which may take five months or longer. They require an entire month before they are no longer free-floating. At about 5 mm size, they may take on an appearance similar to gammarus shrimp.

I'm finding that after about the fifth day, they no longer are so attracted to the light. They may stay close to the bottom of the tank until after sundown. Once the ambient light is gone, the nauplii seem to congregate in the center of the tank, again moderately attracted to the light. This is the best time for me to determine if numbers have significantly diminished.

Mine are now nine days old. There are still many, but somewhat fewer than when I started. These were from three female Yamatos that released their eggs in the span of three days. I've been keeping them at 75 degrees Farenheit and feeding them Liquifry sparingly but up to five times a day. I believe the elevated salinity (1.5 teaspoon coarse sea salt in 2.5 gallon tank) helped to induce hatching. I removed the mothers from the tank and continued to increase the salinity until I reached a total of 4 tsp. If I lose this batch, I will know that this was not enough.

According to a woman who has successfully bred her Yamato shrimp many times, the best foods for the larvae are algae and infusoria. She suggests not only clippings of algae-laden stem plants and leaves, but to culture some green water and feed from this daily. I've been using Liquifry (because I have no algae and did not think to culture GW before the shrimp spawned) but the larvae have been doing fine with it. And a very good thing to have in the tank is Java moss. Java moss is teeming with infusoria, which the larvae can feed on. The moss will also act as an ammonia sink if you're afraid to do water changes for a while. Java moss will survive a salinity of up to approximately 2 tsp salt per gallon.

Neocaridina spp. (eg. bee shrimp, cherry shrimp, tiger shrimp, crystal reds, etc.) hatch looking simply like small versions of the adults. They have bigger eggs, but fewer of them in a single brood. They are fully developed from the moment they hatch, except for their reproductive organs. Caridina spp. have thousands of eggs, but they are extremely tiny, vulnerable, and very few survive to adulthood. They begin life as larvae and go through several stages before they even come close to resembling adult shrimp.

The easiest way to try and breed these shrimp is to use a bare-bottom nursery tank set up only for them. This way, you'll know that what you have in there is Yamato shrimp larvae, and you won't lose any to predation (I saw no evidence of cannibalism by the mothers, either). Two of the three mothers are already carrying eggs again, so if this batch fails, I have the next ones to experiment with. They're very prolific and it's too bad that it's so difficult to raise the young in captivity.

-Naomi

[eric_kclee]

Nothing of that sort observed...if they are like that...should have eaten by my many tetras....sound like mosquitos lavae to me.... Like I say, I have 4 survived till teen age..

Not doubting your observation...sound like you have gotten into the science of breeding Yamato...impressive...

Could it be there are a few genes or types of Yamato???
Any Yamato expert who want to share your view?

[CoryDorus]

Hey another updates. Came home yesterday and to my surprise my entire breeding tank is full of floating in mid-water baby yamato shrimps ! Looks like the 2nd female has offload all the eggs. The 1st female was removed much earlier as no eggs are seen in her.

The scene is scary if they were human lifesize [] Is like alien hanging the victim upside down scene. And Imagine the entire tank is full of it. Aiya no cam ...

One point to note i have introduce 2 female at different times. The earlier one result in worm-like stuff and I can only see a few hanging shrimps later. However the 2nd female shrimps seems to bypass this stages totally and straight to the hanging shrimps.

There is possibility the earlier one is a abortive attempt or ....?? and if it is babies she may have pre-released it.[:]

Now I have another problem ... 3 more females are full of Eggs and I have runout of tanks. Looks like all my female went to full gear. Or the only Male s uper hyper active.

[] [] [] [] [] [:0]

[eric_kclee]

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On 11/8/2003 11:19:26 AM

Hey another updates. Came home yesterday and to my surprise my entire breeding tank is full of floating in mid-water baby yamato shrimps !
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Description is confusing....Are they dead or alive...you sounded happy and excited...so must be alive with thousands of yamato frys??

Can pass me some to upbring them? I have good nursery to nurture them...

[CoryDorus]

Alive lah ... but i don't think many will survive considering earlier attempts by other people experience.

Btw I am based in Taiwan ...

[eric_kclee]

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On 11/8/2003 11:46:42 AM

Alive lah ...
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But you sounded exactly like Singaporean... 'LAH'

Hope you have great success, please post somemore update on the progress..do a head count every week and make report..

[]

[vinz]

ummm... worm like? You sure they aren't planaria? Are they flat and looks like a slug?

[eric_kclee]

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On 11/9/2003 1:14:42 AM

ummm... worm like? You sure they aren't planaria? Are they flat and looks like a slug?
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Vincent,
Is white, flat, slug like the correct Yamato's Larvae? Can you confirm that?

[CoryDorus]

Hello friends,

I just want to emphasis ... my earlier experience of worm-like is too tiny to be observed flat.
When I introduced moss and the first female yamato, expectation is the worm emergence and later tiny flea-like creatures are thought to be related to the female eggs which has disappeared.
A few of the vertically floating yamato baby shrimps were seen later.

However the 2nd female yamato was observed differently. When the eggs were offloaded, straight away I saw full tank of vertical mid-floating yamato baby shrimp. I can see it with my naked eyes that they are miniature version of the parent except floating in mid-water vertically.

I know how a mosquito larvae look like btw. And they are baby shrimps.
Today the babies are still floating veritically.

Dennis Wang

[eric_kclee]

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On 11/9/2003 9:57:48 PM

....I saw full tank of vertical mid-floating yamato baby shrimp.

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Cory...
I visited a few web site on breeding Yamato today...Most of them describe that the babies were positioning vertical in the thank(not mentioned if they float or swim), with the Head pointing down.

Did you see their head pointing down...maybe you sighting is correct...

Not too sure about who is right or wrong though, some seems to support the 'slug' sighting...(Vincent didn't reply). It seem that there are people knowing more than we do...hopefully they will add some infor to this thread.

Anyway...according to other site..it states that it is extremely difficult to breed Yamato in captivity...and I have 4 extra Yamato now..I think I should be happy[]

[CoryDorus]

Yes the head is pointing down. I am sure they are Yamato.
But they tend not to attach to glass at this early stage. They may later per others experience.

However they are all gone now ... after 1 week.

Well there is a few things I did not do or not have ...

1. Change water
2. Capability to measure the salt level
3. Mature filter

so as expected all frys gone.

I still have 3 females full with eggs but I am tired of trying now ...

[Blue Whale]

Any User Acceptance Test? Heh Heh...

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On 10/30/2003 2:16:45 PM

Engineer does not 'gasak, gasak'

Engineer does 'Evaluation' and 'DOE-Design of Experiment' to get down to conclusion.

Reason is to convince people (bosses), if not..confuse them.
[]
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