yellowhead jawfish babies

argggggg-
the wild field plankton again. Awesome-i'm glad that worked, but any idea what sized particle they were feeding on? nauplii of copepods, ciliates, did you happen to look under the scope at what your plankton harvests looked like?
AS you mentioned Rots didn't work- but something did- guesses?
frank
 
Frank, I'll give you more details on the rearing later today, got to get some chores done first. An aquarist works from sun to sun, a breeders work is never done. ....

I do plant to go to IMAC if at all possible, I've got to contact Dennis on this, I plan to talk about building a hatchery in the Keys and breeding yellowhead jawfish and Diadema.

Martin
 
HI Frank,
Yesterday was one of "those" days... and today is not much better so I don't have much time. The yellowhead larvae were smaller than I thought they would be, smaller than I remembered from the rearings in the late 70s. I started them out on wild plankton, dissected a few in the first few days and found only small copepod napulii. I had also fed some rotifers, fairly large ones...., and never found a rotifer in any gut. Which does not mean that none of them ever took a rotifer. Perhaps the only real message here is that they prefer small copepod napulii to rotifers. (Who doesn't?) The mouth size at day 3 or 4 indicates that they could take a rotifer, but in my estimation, that has yet to be determined. If I rear them again I'll try a separate tank with just rotifers from the get go. I got the plankton from the Channel 2 bridge, the current runs through there pretty fast and it's easier to get it there than to take out the boat. Really small copepod napulii and other plankters are taken on the outgoing tide and larger copepods are usually taken (depending on weather) at the top of the incoming tide. It takes me about an hour to leave, make two 15 minute tows, get back and process the catch, not bad.

With this resource I may be able to do some of the small pelagic egg species, such as pygmy angels. We'll see....

Martin
 
Thanks Martin-
great field trial, 'pod nauplii theres a surprise. Actually i wonder if the magical "ss" strains of rots would work, but as you mention the YHJF fry may prefer pods over rots
Thanks for the update
frank
 
catching jawfish

catching jawfish

Great to hear from you,Martin!We had some trouble in this forum lately, and most of the active people flied away:( So you come at the right time to cheer things up a bit!;)
Could you tell us more of the rearing set up? Things like photoperiod,algae,rots or pods,water changes,and the like.
Computers are a mistery for me,buy my daughter taught me how to post pics.So if you have them in your desktop,I can tell in plain words how to make it.But you should have photoshop...

Lol my initials are Luis A M too....does anyone here know about how to catch yellowhead jawfish cause i'm going to the bahamas this weekend and am planning to catch some. Are their burrows deep? Do i just hold a net over the entrance and push them out from the bottom with my hand?:hmm4:
 
First step is checking into the collecting laws in the Bahamas, and the laws involving bringing them back here.
 
No experience about catching jawfish,whatsoever.:uhoh2:
But the burrows are pretty deep,and they used to squirt some quinaldine at the entrance.I don´t know if this is still used,or legal.You should ask some Floridian collector.
 
You could email a collector from Florida who might give you an answer. Your best bet is to email cramers caribean corner,Dana is a very nice guy or sealife Inc. (I have no experience with them though) those are the only two I know of that collect the fish vs buying from someone(collector,diver,etc).
 
No experience about catching jawfish,whatsoever.:uhoh2:
But the burrows are pretty deep,and they used to squirt some quinaldine at the entrance.I don´t know if this is still used,or legal.You should ask some Floridian collector.

Yes, the US is the only country to allows its use, permitted, but still....

In Baja for BSJ our guys used a few methods. Most widely used one by our team was a very small gold mustard hook with the barb shaved off. They make little UW fishing poles using ice pole blanks cut down :)
 
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