belgian grasshoppers: a nutritious food source · introduction need for alternate sources of...
TRANSCRIPT
Belgian Grasshoppers: A Nutritious Food Source Paul, A.1*, Frederich, M.2, Blecker, C.1, Haubruge, E.1, Francis, F.1, Caparros Medigo, R.1, Uttyenbroeck, R.1,Taofic, A.1,
Heuskin, S.1, Lognay, G.1 & Danthine, S.1
1 Gembloux Agro-Bio Tech, Passage des Deportes-2, B-5030 Gembloux, Belgium 2 Department of Pharmacy, University of Liege, B36 Pharmacognosie, Avenue de l`Hopital 1, B-4000 Liege, Belgium
Introduction Need for Alternate Sources of
Protein Entomophagy
Rapid Urbanization
Teaming Millions Africa (524)
Asia (349)
America (679)
Europe (41)
Australia (152)
Edible Insect Species Overview
31%
18% 14%
13%
24%
Beetles
Caterpillars
Bees, Ants andWasps
Grasshoppers,Locusts andCrickets
Others
Percentage share of different insect groups
Why me?
Nutrition Nutritionally superior to conventional meats
Health
- Lower risk of zoonotic infections
-Traditionally used in medications
Environment
- Lesser greenhouse gases emission during production
- Some species feed on dead organic material
Material and Methods
Lipid extraction was done by a cold
extraction technique using 2:1
chloroform/methanol as solvent
Lipids
(Dry weight)
Protein estimation from the residual mass left after lipid extraction
was done using dumas method
Proteins
Thermal profile was analyzed by differential
scanning calorimetry Q1000 DSC connected to refrigerated cooling
system
Thermal Profile of Lipids
Fatty Acid Profile
Fatty acid compositions were determined by GC on a HP 6890 Series GC System fitted with a HP 7683 Series injector and
flame ionization
Samples Grasshoppers caught
from local fields Chorthippus parallelus Conocephalus discolor
Reared in cages to obtain eggs
After laying these grasshoppers were used
for analysis Conocephalus discolor turns cannibal during
caged breeding
Eggs kept at room temperature followed by breaking diapause at 5°C Hatchings obtained (still
juvenile)
Results and Discussion
% Chorthippus
parallelus Conocephalus
discolor
Lipids 6.90 13.07
Proteins 77.80 ± 0.27 78.42 ± 0.17
Thermal Profile of Lipids C 16:0 C 16:1 C 18:0 C 18:1C 18:2
n6C 18:3
n3C 20:3
n3Others
Conocephalus discolor 10.56 1.9 7.55 20.41 53.58 2.28 1.09 9.02
Chorthippus parallelus 0 0 9.74 16.02 14.48 50 0 9.76
0
10
20
30
40
50
60
%
% Fatty Acid Composition
Conclusion 1. Grasshoppers are already consumed as foods in many parts of world. 2. Besides being nutritionally rich, they are also used as medication is
some parts of world and there consumption is also supported by environmentalist.
3. With this amount of proteins and a fatty acid profile with dominant polyunsaturated fatty acids, they can be a potential future food to meet the needs of teaming millions.
4. Further research is required in establishing commercial breeding protocols and effect of specialized diet to improve food quality so that a substantial amount of biomass can be generated to encourage them as human foods.
For more information log on to: www.agricultureislife.be
Project 4B- Field border flowering strips as a source of food or non-
food compounds