MARINE
CLADOCERANS AS FEED IN LARVAL SHRIMP REARING
From:
Eric Pinon epinon@ecua.net.ec
To: shrimp@yahoogroups.com
Sent: 8 March 2001
Comments 1:
A few days ago you mentioned about using Cladocerans
to feed shrimp larvae.
We have been working for a few months now with Daphnia
pulicaria, out of Klamath Lake - Oregon. These Daphnia happens to bloom
intensely at some seasons on the lake and graze freneticly on the lake's
algae. Klamath lake has a specific water chemistry and grows a blue-green
algae called AFA Aphanizomenon flos-aquae.
Our interest is that the Daphnia are highly fed on
the AFA, thus bringing a high load of pigments, vitamins, immunostimulants,
insaturated fatty acids and phyconutrients an "animal feed"
usually doesn't. Basically it’s a natural enrichment.
We have started to use it in white shrimp maturation
and PL. They have proved strong attractability to both. PL 4 seems to
be the smaller stage to start feeding it.
The application is pretty close to the use of Artemia
biomass for PL or broodstock.
Eric Pinon
E-mail:
epinon@ecua.net.ec
***************
COMMENTS
2:
Since we are
fairly new at this with the Daphnia, the best information I can give you at
the moment is to feed comparative amounts of Daphnia biomass to Artemia
biomass. For instance, if you would incubate a one pound tin of 85% +
hatching Artemia cysts, drained the nauplii into a net, you would obtain 1.3
kg of Artemia biomass. Each 25 pound plastic pail of Daphnia contains
11.34 kg of drained Daphnia biomass or the equivalent of 8 pounds of 85%
hatching Artemia.
Howard Newman
Desert Lake Technologies, LLC
E-mail: bshrimp@aol.com
http://www.desertlake.com
Tele: + 1 541 885-6947
Fax: + 1 541 885-6951