Page 20 - Vol.38-No.6

FISHERIES & FISH FARMING

replace the use of fresh/frozen feed was in-
troduced. The diet is semi-moist (30-35%
moist) and manufactured as short pellets at
any length and diameter needed. The diet
is manufactured using an innovative cold
process which prevents oxidation of sen-
sitive nutrients (fatty acids, vitamins etc.).
Due to its unique process and formulation,
the diet is stable in the water for great-
er than 24 hours and will not break down
when the shrimp is holding and chewing it.
These advantages prevents losing essential
nutrients from the pellet due to break down
and leaching.
Polychaetes Nutrafeed

commercial shrimp producer. The results achieving similar or better performances
(Table 1) showed significant performance used to be a challenge.
improvements when the broodstock were The diet was tested with other crus-
fed on the semi-moist diet. Moreover, taceans including crabs and lobsters for
using the semi-moist diet also proved to broodstock as well as juveniles with good
be cost effective compared to traditional results.
diets. 200 white shrimp L. vannamei were Summary. Semi-moist diet (NutraFeed®)
fed control diet (squid, polychates and nu- can successfully replace fresh/frozen
tritional booster) or NutraFeed® SM diet. feeds and use as a whole diet for shrimp

Polychaete The broodstock were kept in identical tanks broodstock. Enhancing and boosting the
and under the same environmental condi- broodstock performances and the quality
tions. Growth, mortalities, spawning events,
NutraFeed® diets are based solely on dry of larvae. The diet is ideal for RAS reducing
meals without any fresh or frozen ingredi- fecundity, hatching rates and number of organic loading in the system.
ents. They are certified as pathogen free nauplii were determined over 124 days.
with a shelf life of six months (refrigerat-
ed) and 24 months (frozen). To boost the
hormonal cycle, various herbal extracts
(Kolkovski, 2010, 2014) are incorporat-
ed into the diets. These are 100% natural
additives aimed at improving broodstock
performances including enhancing egg and
larvae quality, sperm motility, vitellogenesis,
as well as boosting the immune system and Vannamei Broodstock
digestive system support. Initially, these Dr Sagiv Kolkovski is a co-founder
natural herbal extracts were developed as Monodon Broodstock of Nutrakol Pty ltd which specialized
natural hormonal replacements for women in nutritional and health solutions for
during the menopausal period. The diet is used with domesticated P.

monodon broodstock in Australia with the aquaculture industry.
To compare the performances of mat- Dr Kolkovski is also an aquaculture
uration diet against traditional fresh / remarkable results. This is a significant consultant with over 30 years’
frozen feed organism, a large experiment achievement since it is known that P. mono- experience.
was conducted independently by a large don are particularly picky with their diet and
feeding them solely on formulated diet and info@nutrakol.com
Table 1.
Comparison between traditional (control) fresh/frozen feed and formulated semi-moist diet
(Kolkovski, 2017).
Nauplii/
Treatment Days % Mort/day Avg. SR/day Total spawns Egg/Female % Hatch Total Nauplii
Female
Control 124 0.09 3.34% 602 179,364 154,364 86 92,860,000
NutraFeed 124 0.05 4.74 849 186,266 160,188 86 136,000,000
Difference 44.4% 29.5% 29.1% 3.7% 3.7% 0% 46.5%

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