Larval peppermint shrimp

[Luis A M]

This is zoea 4,at 7 dah and 4.2mm.This is the stage where the famous pp5,these long curved legs with big red paddles at the end,first show.
Antennule (A1)has forked in two branches,or flagellums.
There are three pairs of walking legs:mp3,pp1 and pp5.And three pairs of swimming legs:mp2,mp3 and pp1.
Tail fin endops have colored up and are a little shorter than the telson.

 

[ediaz]

Buena foto Luis, asombrosa!

me puedes creer ya me olvide de todo eso? Creo me estoy poniendo viejo.

Ed

 

[Luis A M]

<a href=showthread.php?s=&postid=7430222#post7430222 target=_blank>Originally posted</a> by ediaz
Buena foto Luis, asombrosa!

me puedes creer ya me olvide de todo eso? Creo me estoy poniendo viejo.

Ed

Gracias,Ed!
The idea is to document all stages so people trying to raise shrimp will find a reference.
But did you guys work with shrimp at CQ?

 

[ediaz]

The only shrimp we worked there was the food shrimp we got free from Eureka farms and Bill gave everybody a big bag
Se me olvido de cuando estaba en la escuela.

Ed

 

[Jorge MAnuel]

Hello
About Lysmata seticaudata, is it easy to raise?
Where can I find some information about this species reproduction?

Thanks

 

[FuEl]

Slightly off topic but there is a paper on L. seticaudata.

Calado, R., Figueiredo, J., Rosa, R., Nunes, M.L., Narciso, L., 2005a. Effect of temperature, density and diet on development, survival, settlement synchronism, and fatty acid profile of the ornamental shrimp Lysmata seticaudata. Aquaculture 245, 221-237.

The fastest settlement to postlarvae was only 19 days!

 

[Luis A M]

<a href=showthread.php?s=&postid=7439178#post7439178 target=_blank>Originally posted</a> by Jorge MAnuel
Hello
About Lysmata seticaudata, is it easy to raise?
Where can I find some information about this species reproduction?

Thanks

Ricardo Calado in Portugal has worked a lot with L.seticaudata.He thinks it can have a place in the ornamental trade.Try to contact him

 

[Luis A M]

Zoea 5

Zoea 5

This is Z5,at 10 dah and 4.4mm.
pp2 appear at this stage,so now there are four pairs of walking legs:mp3,pp1,pp2 and pp5.And four pairs of swimming legs:mp2,mp3,pp1 and pp2.Branches of A1 are about 1/3 of total antennula length.Endopods are now long as telson,which is now squarish.
In this pics pp5 are pointing forward,like spears,then the other three pairs of walking legs can be seen.
In next pic pp5 are in normal position and antennula and itÃ"šÃ‚´s branches can be seen.

 

[Luis A M]

Zoea 6

Zoea 6

This is Z6,at 14 dah and 4.9mm.
pp3 show.Now there are five pairs of walking legs:mp3,pp1,pp2,pp3 and pp5.And five pairs of swimming legs:mp2,mp3,pp1,pp2 and pp3.
Branches of A1 are now half of total length,and telson is shorter than uropods.

 

[Luis A M]

Zoea 7

Zoea 7

This is Z7,at 16dah.The last pair of pereiopods,pp4 has shown.Now the larva has it´s full set of legs;six pairs of walking legs:mp3,pp1,pp2,pp3,pp4 and pp5.and six pairs of swimming legs:mp2,mp3,pp1,pp2,pp3and pp4.

 

[spawner]

Luis,

Mouth parts are not swimming legs.

5 pairs of walking legs, 4 of which are bifurcated, having exopods and enodpods. 5th is not bifurcated.

 

[Luis A M]

<a href=showthread.php?s=&postid=7498169#post7498169 target=_blank>Originally posted</a> by spawner
Luis,

Mouth parts are not swimming legs.

5 pairs of walking legs, 4 of which are bifurcated, having exopods and enodpods. 5th is not bifurcated.

I disagree here
Exopods of mp2 and mp3 ARE swimming legs in the larva and WILL become mouth parts in the adult.
And there are SIX pairs of walking and swimming legs.
The purpose of posting pics of every larval stage and using these non technical terms is to give a key everyone can follow to monitor the development of larval Lysmata.
You obviously didn´t read my explanatory post,which I am pasting below:





quote:
--------------------------------------------------------------------------------
Originally posted by FuEl
Hi Luis, hope you don't mind me jumping onto your post. Just thought a clearer picture of zoea I larvae would be of interest to other viewers. My larvae was curled up though, different from your stretched out photo.

--------------------------------------------------------------------------------


YouÃ"šÃ‚´re very welcome Junkai,and your picture is very good! Wow,so much to be said about such a tiny larva!
BTW,I forgot to give the size of the larva,it is 2.8 mm.
Your pic is so clear that even the endopod of mp2 can be seen at the left side.
This reminds me that IÃ"šÃ‚´m talking about "walking legs"and "swimming legs"as I think this is easy to understand for everybody.This is not technical,however and might be objected by some specialists.So a short glossary and explanation could help because the development of the larval appendix is somewhat complex.
"Real"legs are called pereiopods (pp)
Maxillipedia (mp)are appendix used for feeding in the adult,the third pair (mp3)are those white "legs"cleaners use to remove fish parasites.
Pleopods (pl)are the swimmerettes.
In the larva,each of this appendix(except pp5) are split in two branches,called exopodites (my "swimming legs") and endopodites (my "walking legs") .
A new born larva,(zoea1)has no pp yet,and swims with the mp2 and mp3.
As it develops, real legs,pp will show,one at a time and lastly the pleopods.When these are fully developed the last zoeal stage is reached and the larva is ready to settle.
So the "swimming legs"are the exop. of:mp2,mp3,pp1,pp2,pp3 and pp4.
And the "walking legs"are the endop. of mp3,pp1,pp2,pp3,pp4 and pp5.
That was my best effort to make it simple,which it is not!

 

[Luis A M]

This is Z8,at 18 dah.At this stage the pleopods appear,as tiny buds.
This is a wird lateral view,to show the pleop. buds under the body.See the huge pp5,larger than the whole larva.Walking legs point forward and swimming legs to the rear.

Closer look of the buds:

And a dorsal view.The six pairs of colored walking legs can be readly seen:

 

[FuEl]

Looking great Luis, they should settle out in the next few days.

 

[Luis A M]

Zoea 9

Zoea 9

This is Z9 at 22 dah and 6.8mm.
Pleops are developing and now are biramous (two branched)and with 2-3 setae (hairs) at the tips.
I also found a well developed,transparent flagellum of A2 reaching the fork of A1.It must have shown some stages before but I missed it.

Detail of pleops at 50X:See the exopods budding to the left,like spurs.The first pleop,to the right is less developed than the others.

Closer view at 100 X,hairs at the tips :

 

[Luis A M]

Zoea 10

Zoea 10

This is Z 10,at 25 dah and 7.3mm.
Pleopods have grown and can be moved.Exop.is now 60% of endop.Many setae border the tips of pleops. A2 is almost as long as A1.See it at the left of the left A1

Lateral view showing the pleops:

Pleops at 50X.The 1st pair,to the left remains less developed:

at 100X:

 

[Luis A M]

Zoea 11-Last stage

Zoea 11-Last stage

This is Z11,the last larval stage,at 31 dah and 7.5mm.
Pleopods are now fully developed.They measure 1.4mm, and exopod is almost as long as endopod.The 1st pair of pleops.remain less developed.

View of the front end,with the colored forked A1 and the clear A2.Hard to see but pp1 and pp2 end in chelae (claws).

Side view showing the pleops:

same at 50X:

This is the end of the larval series of this species of peppermint shrimp.Pictures of all the larval stages were shown and short description of the diagnostic features were given.Hopefully it will be useful as a reference for anyone attempting to raise Lysmata larvae.

 

[mwp]

Very Cool Luis! No "newly settled" pics?

Matt

 

[Luis A M]

<a href=showthread.php?s=&postid=7588410#post7588410 target=_blank>Originally posted</a> by mwp
Very Cool Luis! No "newly settled" pics?

Matt

Thanks Matt
First post larva showed yesterday,at 34 days.:celeb2:
Promise to post a pic,if I manage to catch it.

 

[Luis A M]

I promised pictures...
This is a post-larva -9mm.No need of a description,just a cute tiny shrimp!

and this is a close view of the head of a 12mm juv.,after it´s first post met molt.These guys grow very fast after settlement!