Digestibility Of Ingredients In Two Pelleted Diets By Macrobrachium Rosenbergii (De Man)
The digestion coefficients of nutrients in two diets containing 30% and 40% protein were evaluated in the Malaysian giant freshwater prawn Macrobrachium rosenbergii. Chromic oxide was used as an internal marker for the evaluation of digestibility. Evaluations were carried out with juvenile and...
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| Format: | Thesis |
| Language: | English English |
| Published: |
1988
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/11752/1/FPSS_1988_2.pdf http://psasir.upm.edu.my/id/eprint/11752/ |
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| Summary: | The digestion coefficients of nutrients in two diets
containing 30% and 40% protein were evaluated in the
Malaysian giant freshwater prawn Macrobrachium rosenbergii.
Chromic oxide was used as an internal marker for the
evaluation of digestibility. Evaluations were carried out
with juvenile and adult prawns including female prawns
undergoing three different stages of gonad maturation.The results indicate that the adult prawns were able to
digest the nutrients of the ingredients better than the
juveniles. In the two diets tested copra cake, wheat flour
and soyabean meal were better digested than fish meal and
shrimp meal for both juvenile and adult prawns. Copra cake
was found to be a good source of lipids (71- 100% ) ,
carbohydrate (85 - 9 6 % ) and dry matter ( 72 - 9 2% ) as well as a
good attractant. Carbohydrate, gross energy and dry matter
were very well digested in wheat flour with values of 9 3 -
100%, 86- 95% and 85-97% respectively. Soyabean meal gave
good digestion coefficients for protein (84 - 99% ) , lipid (90-
97% ) and carbohydrate (80- 100% ) . The results indicated that
copra cake, wheat flour and soyabean meal are good sources
of nutrients for M. rosenbergii. No differences in
digestibility was observed for the female prawns with green,
yellow and orange gonads. This showed that the stage of
gonad maturation has no significant effect on digestibility. |
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