Use Of Fish Silage as an Alternate Protein Source for the Spawn Rearing of Cirrhinus mrigala (Ham.)
Use Of Fish Silage as an Alternate Protein Source for the Spawn Rearing of Cirrhinus mrigala (Ham.)
Date
2006
Authors
Ittoop, Gijo
Jose, Susheela
Nair, Dinesh K
CM
Joseph, Aneykutty
Journal Title
Journal ISSN
Volume Title
Publisher
Society of Fisheries Technologists (India)Cochin
Abstract
An experiment was carried out to study the efficacy of fish silage as an alternate protein
source for rearing the spawn of Cirrhinus mrigala. 3 days old mrigal spawn of a single batch of
initial average weight 3.5 ± 0.1 mg and length 6 ± 0.14 mm were stocked at a stocking density
of 2nos/L in fibre glass tanks. For the first three days feeding was done with mixed zooplankton.
From the fourth day onwards, four different types of feed were given with 6 replicates each for
30 days. The feeds were as follows: Conventional feed (Powdered ground nut oil cake and rice
bran in the ratio 1:1) (T,), formulated commercial feed (T2), Dried and powdered fish silage
made from low quality trash fish (T,) and Fish silage powder and conventional feed in the
ratio 1:1 (T4). After 30 days, it was found that the percentage weight gain (12138), Specific
growth rate (15.69) and Net Biomass Index (407.7) of the fish spawn fed with fish silage and
conventional feed in the ratio 1:1 were significantly higher compared to those fed either
conventional or commercial feed. The survival was not significantly different in any of the
treatments. The results show that fish silage can be used as an alternative cheap protein source
for the spawn rearing of C. mrigala, thereby reducing the cost of spawn rearing to a great
extent.
Description
Keywords
Fish Silage, Cirrhinus mrigala, spawn feed, specific growth, survival
Citation
Fishery Tech 43(2):176-179