Go Back   Science Forums Biology Forum Molecular Biology Forum Physics Chemistry Forum > Molecular Research Topics Forum > Animal and Molecular Model Systems > Zebrafish Forum
Register Search Today's Posts Mark Forums Read

Zebrafish Forum Zebrafish Danio Rerio Forum. Discuss zebrafish, aquarium culture and molecular biology lab specimens.

Hatchfry encapsulation I

Hatchfry encapsulation I - Zebrafish Forum

Hatchfry encapsulation I - Zebrafish Danio Rerio Forum. Discuss zebrafish, aquarium culture and molecular biology lab specimens.

LinkBack Thread Tools Display Modes
Old 08-11-2003, 02:43 PM
Dallas Weaver, Ph.D.
Posts: n/a
Default Hatchfry encapsulation I

Christina and others,

When thinking about using various non-living diets on your larval fish,
you should keep in mind the world wide billion dollar aquaculture
business of producing commercial larval fish and shrimp. With this
business spending several hundred million dollars per year on larval
diets, their experience may be relevant.

I don't know of any commercial hatchery that has gone to zero live
feeds for animals with small larval stages. Dry/prepared feeds are only
used to supplement live feeds, not replace live feeds. For example,
when the price of artemia cysts increases, the hatcheries increase the
amount of dry feeds to save money, while decreasing the performance
of their animals.

As zebra fish researchers are not producing billions of animals, the
actual cost of the feed is a minor fraction of the total cost of the
research. Under these conditions, researchers should just forget about
dry/prepared larval feeds and just use live feeds for the larval stages.

The performance difference between live and dry/prepared is very
significant. When the aquatic feed industry can produce a
dry/prepared diet that can take a zebra larva from "swim-up -- first
feeding" to large enough to eat 48 hr artemia napulii in 3 to 4 days, I
will consider switching from rotifer/paramecia feeds. When they do
develop such a dry feed, you will see the price of artemia cysts fall to
the historical value of < 10$/lb.

I have talked to researchers who spend 10 days or more on this swim-
up stage and that means 6+ days of lost research effort and, more
importantly, a fish that was nutritionally stressed at a young age, which
may impact later research and breeding.

The only real larval feed issues relevant to zebra researchers revolve
around how to produce or purchase your supply of live feeds and how
to enrich those feeds to get the proper nutrition. I have several
customers who just buy a weekly supply of rotifers and then feed those
live rotifers some instant algae to enrich them before feeding to the
larval zebra fish.


PS: With live feeds all the way, you can go from egg to egg in 47 days
with this fish. You have to ask, what would that do to your research

in article bg9of1$389$[Only registered users see links. ].mrc.ac.uk, Christina
Quasarano at
[Only registered users see links. ] wrote on 7/30/03 5:38 PM:

Reply With Quote

encapsulation , hatchfry

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
bacterial encapsulation Ramya Balaji Protocols and Methods Forum 0 09-18-2006 10:03 AM
encapsulation Amanda Moss Microbiology Forum 0 04-12-2004 06:46 PM

All times are GMT. The time now is 05:10 AM.

Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Copyright 2005 - 2012 Molecular Station | All Rights Reserved
Page generated in 0.11485 seconds with 16 queries