Rema MK
Microencapsulation and its Effects on Quality and Shelf Life of Prawn Larval Feed - Panangad Department of Processing Technology, College of Fisheries 1998
Three microencapsulated diets have been prepared using clam meal as the protein source
and collagen and gelatin (extracted from fish skin waste) and commercially available egg albumin
as the encapsulating material. Attempts were made to rear the larval prawn, M 'aorobrachium
rosenbergii, with these diets and to study the effect of encapsulation on quality and shelf life of the
encapsulated feeds. The results of the 15 days feeding trials showed that all the three encapsul-
ated diets were acceptable to the larvae from V th stage onwards with survival rate ranging from
80-90 % which is comparable with that of live Artemia nauplii (90%) and the larvae also
undergone moulting during the rearing period. The microbial analysis and the rancidity tests
conducted to evaluate the shelf life of the feed showed that all the feeds remain in good condition
after 45 days of storage except that the gelatin encapsulated diet showed a comparatively higher .
number of microflora. However, the gelatin encapsulated diets showed permissible limit of
rnicroflora after 15 days of storage. The peroxide and rnalonaldehyde content of the prepared diets
were below the toxic level to affect the survival of the larvae, A definite tolerable level of rancidity
in prawn feeds is not known. Hence, to find the lethal level of toxicity of oxidised feed further
work has to be done in this field.
639.2 / REM/MI
Microencapsulation and its Effects on Quality and Shelf Life of Prawn Larval Feed - Panangad Department of Processing Technology, College of Fisheries 1998
Three microencapsulated diets have been prepared using clam meal as the protein source
and collagen and gelatin (extracted from fish skin waste) and commercially available egg albumin
as the encapsulating material. Attempts were made to rear the larval prawn, M 'aorobrachium
rosenbergii, with these diets and to study the effect of encapsulation on quality and shelf life of the
encapsulated feeds. The results of the 15 days feeding trials showed that all the three encapsul-
ated diets were acceptable to the larvae from V th stage onwards with survival rate ranging from
80-90 % which is comparable with that of live Artemia nauplii (90%) and the larvae also
undergone moulting during the rearing period. The microbial analysis and the rancidity tests
conducted to evaluate the shelf life of the feed showed that all the feeds remain in good condition
after 45 days of storage except that the gelatin encapsulated diet showed a comparatively higher .
number of microflora. However, the gelatin encapsulated diets showed permissible limit of
rnicroflora after 15 days of storage. The peroxide and rnalonaldehyde content of the prepared diets
were below the toxic level to affect the survival of the larvae, A definite tolerable level of rancidity
in prawn feeds is not known. Hence, to find the lethal level of toxicity of oxidised feed further
work has to be done in this field.
639.2 / REM/MI