Coral Banded Shrimp Settlement

[Noof]

Hello,
I am interested in the settlement cues for CBS. Can anyone tell me a little about it or is it a secret?
Typically do they require chemical or physical cues?

I am also interested in information about Harlequin shrimp breeding which as I understand it is not the most difficult passtime?

If anyone can help the australian reefing hobbiests, it would be appreciated.
Thanks
Nathan

 

[FuEl]

I have not read up anything with regards to settlement cues needed for CBS. From what I know the commercial people just harvest postlarvae from the wild and grow them out in remote facilities. Reported larval duration of various stenopus species spans from >50 to >120 days. Stenopus larvae can take bbs immediately but I make it a point to introduce rotifers as well such that weaker or smaller larvae make it as well. Currently I have some just about to hit the 50 day mark but they are still rather small. Probably not even halfway through their larval cycle yet.

As for harlequin shrimp breeding, many sources online said they can be fed Artemia nauplii straight after hatching and even some sources say they do not feed after the first moult. I have failed miserably using Artemia to start them off and all died by 5-6 days. No moults were observed during this time. The larvae just got weaker and weaker. I would say they need to be started off on rotifers, not bbs.

 

[Luis A M]

IME the problem in raising Stenopus and Lysmata larvae is not the lack of settlement cues,but our failure in keeping them alive thru their long larval life.
Stenopus hispidus seems even more difficult than L.amboinensis/debelius in this respect.My survival record with them is 40 days,for one not particularly healthy specimen.
FIT could raise S.scutellatus past MMP but there are very few reports of S.hispidus being ever raised.I could only find a paper from Bangor of 1995 where S.hispidus took 17/30 weeks (4-7 months) to settle.Earliest time was 123 days.:eek1:

 

[FuEl]

Yep I agree that long larval duration does complicate matters. It does mean that there is a higher probability of things going wrong. I'm working on S. cyanoscelis now. Similar in appearance and size to S. scutellatus. Hopefully a similar larval duration? :rollface:

 

[Noof]

Thanks for the info. I agree that the long larval period could be an issue although I would like to know more about the settlement before I get there? If I am going to get these shrimp to 120 days old then I would like to know where to go next?

Do you have a copy of that paper Luis? Would be interested to see what it contains?

 

[Luis A M]

In a nutshell,you first need to get them to the last zoeal stage and then -but only then-expect them to settle.
Yes,I have the paper.I can ask my daughter to scan and pdf it,if you want it.

 

[Luis A M]

I could pdf it but it is 16K
If some1 wants it that way,let me know where to email it.Will try to make it better tomorrow

 

[Noof]

Thanks Luis,
I would love a copy.
Please email to njp@rla.com.au
Cheers

 

[Luis A M]

It was 16MB,not KB!:eek1:
I had it fixed and itÃ"šÃ‚´s now 2.89 MB.Let me know who needs it.

 

[FuEl]

Most helpful of you Luis. One of the earliest papers on raising cleaner shrimp larvae which I had a pain finding online.

 

[Luis A M]

Yes,see that Bangor people were successfully raising ornamental shrimps at that time and they were using HUFA enriched bs.One of the authors,Wunsch,was probably the first to raise L.amboinensis and L.debelius,and wrote an extensive doctoral thesis describing the early larval stages of L.amboinensis and his rearing techniques.

 

[Krypticol]

krypticol@aol.com would love a copy!!!
Thanks guys!!!

 

[redcray]

<a href=showthread.php?s=&postid=7221239#post7221239 target=_blank>Originally posted</a> by Luis A M
It was 16MB,not KB!:eek1:
I had it fixed and itÃ"šÃ‚´s now 2.89 MB.Let me know who needs it.

I PMed you on Saturday for a copy. Thanks

Matt

 

[Luis A M]

<a href=showthread.php?s=&postid=7241657#post7241657 target=_blank>Originally posted</a> by redcray
I PMed you on Saturday for a copy. Thanks

Matt

Nope,didnÃ"šÃ‚´t make it.
Try again!

 

[FishnWishn]

I will take a copy also FishnWishn@comcast.net
Thanks, Luis

 

[till]

till_deuss@web.de

thanks!

 

[JamisonSmith]

Luis A M,
would love to receive a copy at JamisonMSmith@gmail.com

Thanks,

Jamison

 

[kaserpick]

Luis A M,
I would also love a copy of that paper
kaserpick@yahoo.com

Thanks,
Kaserpick