Growth,
survival, quality and digestive enzyme activities of larval shrimp fed
microencapsulated, mixed and live diets
R. Pedroza-Islas, P. Gallardo, E.J.
Vernon-Carter, T. García-Galano, C. Rosas, C. Pascual, G. Gaxiola-2004
Aquaculture
Nutrition, 10(3):
167-174
Abstract:
An artificial diet for shrimp larvae was
microencapsulated with a polysaccharide blend [66% gum arabic, 17% mesquite
gum and 17% maltodextrin 10 dextrose equivalent (DE)]. Microencapsulated
diet (MD) was fed to mysis alone, as a co-feed with the microalgae Chaetoceros
cerastosporum and Tetraselmis chuii (mixed) and compared with a
live diet (control) of C. cerastosporum, T. chuii and Artemia
nauplii. No significant differences (P > 0.05) were
detected in growth rates, development and quality indexes of larvae fed the
three experimental diets. All diets supported survival percentages of
>90%. Shrimp larvae fed MD and mixed diets had higher specific trypsin
activity and soluble protein content than those fed live diet. Amylase
activity decreased in larvae fed the mixed and MD apparently due to the
carbohydrate composition of the diet. The results indicate that it is
possible to substitute a live diet with a microencapsulated one (with a wall
composition made up of a polysaccharide blend) in Litopenaeus vannamei
mysis.
(Apdo Postal 69 Cd del Carmen, Campeche, México.
E-mail of G. Gaxiola: mggc@hp.fciencias.unam.mx)