Oxyrrhis marina as larval fish food.

Oxyrrhis marina as larval fish food.

Postby Luis A M » Sun May 23, 2010 1:34 pm

If this organism could be used as first fish larval food,it would be very good news,because:
1-At 30 x 15 mics,it is smaller than the smallest copepod naups.
2-It has an atractive (for larvae)motion.
3-It seems easy to culture,very hardy and productive.
4-Unlike many of the ciliates,which require bacteriae and messy organic media,this flagellate feeds on phyto and can be therefore enriched with selected algal species and co-cultured with copepods.
Now we have to check if larvae will take it.Good experiment for our Research Forums.

So here it goes,I started two spp of damsels (N.melas and C.cyanea)with O.marina.Will they eat them,survive and grow? :?
Luis
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Re: Oxyrrhis marina as larval fish food.

Postby "Umm, fish?" » Sun May 23, 2010 8:05 pm

I can report that the sixline wrasse larvae lasted several days longer with O. marina in the water than larvae who did not have the flagellate. I don't know if that means the larvae were eating the O. marina or that the O. marina were predating on bacteria, but it's encouraging nonetheless.
Andy

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Re: Oxyrrhis marina as larval fish food.

Postby Luis A M » Wed May 26, 2010 5:36 pm

Discouraging results :(
Larvae were ok at day 2,ruling out environmental issues.
Few weak larvae could be seen at day 3 and none at day 4.
This is like a starvation test.A control,set the same but given copepods is still fine. :roll:
So O.marina doesn´t work as food for larvae,at least for damsels. :?
Luis
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