"Long-Armed Prawn" @ Petco = Macrobrachium?

GunmetalBlue · Post by **GunmetalBlue** » Sun Jun 19, 2005 3:57 pm

Hey Chlorophyll, the kiddies look great! Is that the ol' Agfa loop pic trick?

If you're cataloguing all their stages, it could make for a very interesting and informative article/webpage. You certainly seem to know enough about them. Best wishes on their continued progress, Papa-san.

-GB

chlorophyll · Post by **chlorophyll** » Fri Jun 24, 2005 1:44 am

Thanks GB. They're still doing pretty well. Down to 800-900 now, but stocking density is really only supposed to be 100/L ... so if I could possibly get 400 out of my 4 L nursery, it would be pretty good.

I was a bit too lazy to try to catalogue all the larval stages, however here's probably the best one around on the net. They do have the last two pictures switched in order, and my stage VI pleopod buds photo blows their's away if I do say so myself

(part of the reason I took my own pic is because their's is kind of hard to see)
But I guess it is easy to seem to know about a species that has been studied so extensively as M. rosenbergii has been. However, it could still serve as a nice foundation for studying and larval-rearing other larvae-bearing FW shrimp.

There are other shrimp which I would be interested to catalogue their larval stages. I hope to get the opportunity soon.

I think I finally have stage IX at day 19. This is a difficult stage for me to ID since I'm not so familiar with identifying "appendices internae," at all, much less under microscope on a jumping baby.
Looking for a different way to ID this stage, I noticed the rostrum being larger than ever previously and fully viewable above the eyestalk (where the rostrum is largely hidden behind the eye in all previous stages). Just like the stage X pic in the online catalogue, but lacking the little rostrum teeth that mark stage X. I'm taking that to be a good indicator of stage IX. Wish I had a pic. Maybe later. I always have a hard time with cameras

chlorophyll · Post by **chlorophyll** » Sat Jul 09, 2005 6:12 am

Finally, observed stage XI individuals. Just one moult away from PL, with a dozen or so over 200 individuals left. I'm anticipating perhaps 25% from here may not see PL. Once I start getting PL's, I'll probably only keep the nursery running for another 10 days, so those who don't grow up might just be out of luck

(well, I don't know, we'll see if I have such callous soul-lessness in me...)

Truth is, most of the larvae are still probably back at stage IX (few might even be lingering at VIII). But I'm be looking for a boom in the next week.

GunmetalBlue · Post by **GunmetalBlue** » Mon Jul 11, 2005 9:24 am

Chlorophyll, you've been nursing these guys along some time now, will be exciting for them to reach the final stage (Hehe, sounds like the Tour de France or something). So some are still straggling along at an earlier stage, huh?

Keep us posted this week should they reach PL.

-GB