This document summarizes a study that tested the use of roasted guar korma (RG) as a replacement for fishmeal and soybean meal in shrimp feeds. The study found that: - Diets with 5% RG replacement performed similarly to the control diet in terms of shrimp growth and feed conversion ratio (FCR). - Diets with 10% RG replacement showed slightly lower shrimp growth and a statistically higher FCR compared to the control, though all FCR values were still good. - The results indicate that 5% RG can safely replace fishmeal and soybean meal in shrimp feeds, providing an important cost savings. Higher 10% inclusion is possible but may impact growth and efficiency slightly.

1. INCORPORATING
FISH FARMING TECHNOLOGY
November | December 2014
Utilisation of Roasted Guar Korma as
alternative for fishmeal and soybean meal in
shrimp diets
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The International magazine for the aquaculture feed industry

3. Utilisation of Roasted Guar Korma
as alternative for fishmeal and soybean meal in shrimp diets
Roasted Guar Korma is a high
protein raw material, obtained
after extraction of Guar gum from
the seeds of the leguminous plant
Cyamopsis tetragonoloba. It is cleaned and
roasted after the gum extraction to remove
anti-nutritional factors present in korma,
such as trypsin inhibitor, improving its nutri-tional
values and total digestibility.
The product is obtained without added
chemicals or preservatives and is completely
GMO free, which can be an important factor
to replace soybean meal.
Roasted Guar Korma is thus a competitive
alternative for soybean meal, but there is little
information about its use in Aquafeeds.
Experiment:
3 experimental diets were produced: one
reference diet, a diet with 5 per cent Roasted
Guar Korma and a diet wiht 10 per cent
Roasted Guar Korma. Feeds are produced
with a pellet mill on a 2 mm die, using
preconditioning with steam (>90°C) and
postconditioning (>90°C) during 20 minutes.
Roasted Gur Korma replaced 50 per cent
soybean meal and 50 per cent Chilean Fish
meal to obtain the same protein levels in all
feeds.
Shrimp trial
The shrimp trial was conducted at the
CreveTec-AFT Research station in Venray.
The trial started with shrimp (Litopenaeus
vannamei, Shrimp Improvement Systems) of
+2,5 g and lasted for 4 weeks.
There are 4 replicates for each diet, so 12
tanks of 150 l in total. Each tank received 30
shrimp. All tanks are connected to a bigger
tank. This way, all tanks have the same water
quality. Water quality in the big tanks is main-tained
with bioflocs.
Feed gift is adapted daily according to
the average weight of shrimp, biomass and
expected growth.
Each week, shrimp were counted and
weighed together to have average weight and
total biomass.
Results:
Initially, growth of feeds with RG were
showing better growth, but this did not
continue during the whole 4 weeks. We can
observe that the feed with 10 RG has a little
less growth, and this difference is statistically
different.
by Eric De Muylder1, Diana Pablos2, Milivoj Rubcic2 and Leon Claessens3
Table 1: Composition of Roasted Guar Korma
Crude Protein 55%
Crude Fat 7%
Moisture 6%
Crude Fiber 3%
Ash content 6%
Amino acids (as % of crude Protein)
Methionine 1,105%
Cysteine 1,278%
Lysine 4,208%
Threonine 2,817%
Arginine 12,744%
Isoleucine 2,915%
Leucine 5,367%
Valine 3,357%
Histidine 2,450%
Phenylalanine 3,734%
Table 2: Composition of test diets
REF RG5 RG10
Raw Material :
Chilean fish meal 25 22,5 20
Squid liver powder 4 4 4
Hemoglobin powder 2 2 2
Wheat flour 34,8 34,8 34,8
Soybean meal 20 17,5 15
Rice bran 5 5 5
Soyalecithin 1,2 1,2 1,2
Fish oil 0,9 0,9 0,9
Wheat Gluten 5 5 5
Premix 2 2 2
Roasted Guar Korma 5 10
Total 100 100 100
Crude Protein 38,26 38,26 38,26
Lipids 7,08 7,08 7,08
10 | INTERNATIONAL AQUAFEED | November-December 2014
FEATURE

4. The FCR was statistically higher for the
feed with 10 per cent RG, but differences
are very small and all FCR observed are very
good.
Conclusions
We can safely conclude that 5 per cent
Roasted Guar Korma can replace 2,5 per
cent soybean meal and 2,5 per cent fish meal
in feeds for Shrimp (Litopenaeus vannamei),
which is an important result, because it will
be an important cost saving for the shrimp
feed producer. Also 10 per cent inclusion
rate is possible, but then there might be a
very low effect on growth and FCR. Roasted
Guar Korma is also a valuable alternative for
soybean meal in case the producer wants to
guarantee GMO free production.
About the authors:
by Eric De Muylder1, Diana Pablos2,
Milivoj Rubcic2 and Leon Claessens3
1CreveTec, Heirbaan 56, 1740 Ternat,
Belgium, eric@crevetec.be
2 Pacta Srl, Via Lametta, 146- 41010
Limidi di Soliera, Italy, info@pactasrl.
com
3AFT, Poststraat 8, 5801 BC Venray,
Netherlands, info@aquaculture-ft.com
Table 3. Average weight
Day 0 7 14 21 28
Ref 2,523 a 3,423 4,690 6,900 8,908 b
RG5 2,591 a 3,516 4,774 6,933 8,938 b
RG10 2,498 a 3,522 4,665 6,599 8,484 a
Week 1 2 3 4 total
Ref 0,899 a 1,267 2,210 2,007 6,385 a
RG5 0,925 a 1,258 2,160 2,005 6,347 a
RG10 1,024 a 1,143 1,933 1,885 5,985 b
Week 1 2 3 4 total
Ref 1,106 1,040 0,711 1,081 0,943 a
RG5 1,211 1,154 0,762 1,135 1,011 ab
RG10 0,980 1,159 0,835 1,101 1,004 b
THE BEST WAY TO PREDICT THE FUTURE IS TO CREATE IT.
—Peter F. Drucker
Table 4. Growth
Table 5. FCR
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November-December 2014 | INTERNATIONAL AQUAFEED | 11
FEATURE

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FISH FARMING TECHNOLOGY
Utlisation of Roasted
Guar Korma
INCORPORATING
– as alternative for fishmeal and soybean
meal in shrimp diets
Hydrolyzed yeast
– as a source of nucleotides and digestible
nutrients in shrimp nutrition
Biomin’s World Nutrition Forum
– "Meeting the needs of the present while improving the
ability for future generations to meet their own needs"
Securing the future
– Aquaculture growth and
role in global food production
Fish Farming Technology supplement
- Seal defense, Temperature stress
VOLUME 17 ISSUE 6 2014 - NOVEMBER | DECEMBER
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