While performing maintenance on a clutch of 48 hour zebrafish embryos,
I came across one with a swarm of parasites within its chorion. All
the other embryos in the clutch were fine. I examined the embryo 5
hours later and it was almost completely devoured. I assume that this
is a parasite that the mother passed on? Unfortunately, the cross was
albino stock and the individual fish was put back into a group tank
after breeding. What were those things and what action if any needs
to be taken?
If anyone would like a picture or video of the embryo I’d be happy to
send one in hopes of identifying the parasite.
On Jul 31, 6:16 pm, [Only registered users see links. ] wrote:
See previous discussion on this board concerned with "coleps" for the
most information. Also: [Only registered users see links. ]
These commonly contaminate embryo dishes and are frequently found
inside the chorion. There is no silver bullet, if you have adults on
a seperate system from your fry you should try fluctuating the
conductivity significantly in the adult system on a semi-regular
basis. Clean "bio-sludge" from system drain gutters and spillways and
frequently ethanol work areas, incubators, etc. Bleach all eggs as a
short-term control. Perhaps the most important single factor:
thouroghly clean your embryo dishes of everything but the embryos on a
daily basis (leftover chorion is the colep equivelant of the deluxe
nacho platter at T.G.I.Fridays).