We are experiencing high mortality with our Galaxids die at around the 14th day after hatching. I thought it could be that they are not able to inflate their swim bladder. In the wild they spawn at sea/brackish water and at around week 12 they migrate to freshwater. Does anybody know what sign to look at or if there is another reason. The lab didn't show any pathogen and said most fish had empty guts. I think due to their inability to swim properly made them not able to catch the live food we offer.
Dear Tagried
I would like to get your email address so we can discuss scientific matters on fishes if you like.
Laith A. Jawad
Auckland
New Zealand
Larvae might not be accepting the feed being offered to them, owing small size of the mouth. They need to be fed with feed of small dimensions. May be you can initially try chicken egg custard, along with live feed.
Dear Tagried, the 14 day time frame may coincide with the dietary switch from the yolk-sac to exogenous food sources. This is broadly similar to observations I have made on the timing larvae of other galaxiids switch to free-feeding. Although these observations were based larvae collected from the field.
Dear Tagried,
I think you should try different foods and see if any of them is right.
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