fan shrimp reproduction

[Andyroo]

I know a lot of the fan shrimp species require a brackish or marine period at or after hatching, but there seem to be some questions as to wether all of the species do.
Around here we've got a good 1/2 dozen species that I've seen, from brown/red 5"ers to brilliant crimson & yellow 1/2-inchers, all of which I've seen "berried" (with roe).

It seems incredible that a shrimp that matures at 1/2" would have its pups float 10miles down to the estuary then have to climb back up.... but nature is often pretty incredible.

So if I was interested in having a whack at breeding these tiny species, would I need/want to use a brackish hatch stage?

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[stackdeck]

I am not familiar with shrimps from where you are..perhaps you have pics or a scientific name for these shrimps?

 

[Andyroo]

I'm asking generally. Are there species of fan shrimp that don't require a marine/estuarine stage?
Local ones don't look particularly different from your bamboo shrimp, though there are several species and there also seems to be some sexual dimorphism.
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[Veneer]

Down in Jamaica you're seeing Micratya, Potimirim, and Jonga (as well as the big Atya, which are less brightly colored). All of them require saline water for larval development -- well, no one's demonstrated that any population's capable of life cycle completion in freshwater alone. They're found further inland than that, btw. If you want, I can try to find some publications related to larval rearing of these or related atyids.

 

[Andyroo]

Thanks Veneer, I'll have a Google on those names.
Don't worry about the literature- I'm more curious than anything. There are some great Lymo-folk at UWI I'll ask if I get really motivated. Some colleagues/friends are breeding & raising Macrobrachium rosenbergii on the south coast- they've got the brackish stages sussed out. I'll ask them too.
I'll keep you posted if/when I get there.
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[DirtyPoorFish]

Yup

 

[EmilyMarie85]

I have what I believe to be a male and a female, of some kind of atya. I saw the female berried once, and wanted to raise the larvae -- I was hoping they would survive in the main tank, but that did not work out... I really think they need brackish..

Female:


This is the male:

 

[Andyroo]

What the guys here do with Macrobrachia is they take the (heavily/mature/late-term) brown-berried females out and put them into another tank with vaguely salty water with a bit of bubble-current. As soon as the eggs come off the females are put back into fresh, and the eggs are left to hatch (couple of days) and are fed on egg-yolk & new hatched brine shrimp. They're kept in the brackish for a couple of moults, then moved to fresh. Don't know about gradual change from brackish to fresh and back- as far as I saw they had only two conditions and were just netting from one and moving to the other. I'll ask and keep you posted... again, when I get off my tush and try this out.
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