FARM RAISED SPAWNER Vs. WILD SPAWNER
From: Delvar Bushehr
To: shrimp@egroups.com
Sent: June 08, 2000
QUESTION:
Does anyone have had success with farm raised spawners?
What is the best way to keep them unharmed over the winter cold?
Delvar Bushehr
shrimpfarm@yahoo.com
********************
COMMENTS 1:
We farm with farm raised Penaeus indicus. Each year we improve their
performance through attention to their husbandry. Currently we use a
mix of about 30% wild broodstock and 70% pond reared broodstock. We use
more wild broodstock in August and September when the temperatures are low
and the prawn are still relatively young. In the following months the
domestic broodstock becomes more important.
One way to manage broodstock through winter is to cycle them through
heated indoor ponds where they can be held for a week, fed well and
stimulated to moult. Through this method they remain in good condition.
Laurence Evans
laurence@amatikulu.co.za
*******************
COMMENTS 2:
In America the shrimp culture industries of Brazil, Venezuela,
Colombia, Mexico, Belize, and the USA are almost entirely based on
shrimp produced from domesticated pond (or tank) reared broodstock, and
have been so for the past 5-20 years (depending on the specific country).
Domestication programs have been recently initiated (belatedly) in
Ecuador, Panama and Honduras (and probably a few other countries that I am
not aware of). The total number of hectares in production with
domesticated shrimp in the aforementioned countries is probably well over
50,000 hectares. I am just guessing, but I estimate that the total amount
of domesticated (from pond/tank raised broodstock) shrimp produced from
those countries since the inception of their domestication programs is
probably in excess of 700,000 metric tons of whole shrimp, with an
approximate market value of US$ 5 billion. I would venture to say that
those numbers constitute a "success".
Those figures are for western hemisphere white shrimp (vannamei and
stylirostris). Comparatively little effort has been made in Asia to
domesticate monodon, mainly due to the abundant supply of wild
broodstock, and the erroneous misconception that pond reared monodon
broodstock are grossly inferior to wild adults.
If you are in a temperate climate, the best way to overwinter your
broodstock is in covered, temperature controlled tanks or ponds, or
using geothermal well water or the heated effluent from power plants (if
available). Or you can produce them in ponds during the warmer months, and
then transfer them indoors during winter.
Henry Clifford
hcclifford@aol.com