REPORT ON AQUACULTURE ASSOCIATION OF CANADA, ANNUAL MEETING SESSION ON LIVE FEEDS, June 3, 1998 LIVE FEEDS WORKSHOP, June 4, 1998
Though the Live Feeds Session was held on the last day of the AAC
Conference, it was very well attended and appears to have been a great
success. There were five invited speakers and seven contributed
papers (Program and abstracts of the papers are in Appendix I). Four
of the invited speakers attended thanks to funding by The Canadian
Center for Fisheries Innovation and The Atlantic Canada
Opportunities Agency. The fifth invited speaker was able to
participate thanks to funding from The National Research Council,
Industry Research Assistance Program which supported the Live Feed
Workshop on June 4 following the AAC Meeting.
The same five invited speakers (Dr. Lesley McEvoy, NERC,
University of Stirling, Scotland, Dr. Josianne Stottrup, Danish
Institute for Fisheries Research, Dr. Moti Heral, University of
Maryland, Dr. Philippe Dhert, Ghent University, and Dr. Atsuschi
Hagiwara, Nagasaki University) as well as Ms. Tania De Wolf, INVE
and Mr. Phil Boeing, Aquafauna, Bio-Marine Inc. participated in the
Live Feed Workshop and demonstrations at the Memorial University
of Newfoundland, Ocean Sciences Centre on June 4. There were more
than 40 participants from industry, university and government
research programs.
The format was very informal and after approximately 20 minutes of
introductory comments from each speaker, the discussion was largely
driven by questions from the participants. INVE provided 8 kg of
Artemia cysts which were used in demonstrating proper decapsulation
procedures and newly hatched nauplii were used to demonstrate
enrichment techniques. Phil Boeing, Aquafauna provided free samples
and introduced a number of new live feed enrichment products
including Algamac-3000 a spray-dried heterotrophic algal product
which has very high DHA content and high DHA/EPA ratio. This
workshop was enthusiastically received by the participants who felt
that this was a more useful and informative format than the usual
conference format which has 14 minute presentations and little time
for questions and discussions. There was unanimous agreement that a
workshop should be included in the AAC meeting to be held October
1999, in Victoria, BC.
A few examples of the important information exchanged at the
meeting include:
Description of a relatively easy to maintain semi-automatic copepod
culture and collection system. This might help to relieve some of the
dependence on inferior nutritional quality Artemia and rotifers for
marine fish larval culture. (Stottrup)
Identification of a potentially catastrophic over-feeding problem with
MMI, halibut larvae. (Heral)
Results from a cool-water Artemia enrichment technique that results
in much higher DHA levels and acclimates the Artemia to larval
culture temperatures. This results in greater nutrient enrichment and
more active Artemia, which in turn are more rapidly consumed by
the marine fish larvae. (Jonnathan Moir)
A technique to determine health and stress status of cultured rotifers
and use of hormones to reduce stress and double growth rates of
rotifers. (Hagiwara)
Significant improvements in Artemia enrichment using phospholipids
purified from fish roe to produce enrichment emulsions. (McEvoy)
A new combined enrichment "antibiotic" media that significantly
decreased total and potential pathogenic bacterial levels of enriched
Artemia nauplii. (De Wolf, INVE).
A new very high DHA, spray-dried algal enrichment product
(Algamac-3000) that could significantly improve Artemia
enrichment and reduce malpigmentation in juvenile halibut and other
marine flatfish. (Boeing, Aquafauna)
There is little doubt that this workshop has been a valuable tool in
aiding in technology transfer to the developing marine fish culture
industry in Canada and we the organizers would very much like to
thank the sponsors for making this possible.
John Castell, Joe Brown, Brian Blanchard, Olav
Lyngstad, Nick Brown and Gidon Minkoff.
John Castell,
Department of Fisheries & Oceans,
Biological Station, St. Andrews,
NB E0G 2X0, Canada
Tel: (506) 529-5904
e-mail: CastellJ@mar.dfo-mpo.gc.ca
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