“EFFECT OF REPLACEMENT OF DIETARY FISHMEAL BY SQUILLA MEAL AND EARTHWORM MEAL MIXTURE ON GROWTH PERFORMANCE, SURVIVAL RATE AND BODY COMPOSITION OF WHITE LEG SHRIMP, Litopenaeus vannamei”
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Date
2020-11
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JAU,JUANAGDH
Abstract
The experiment on “Effect of replacement of dietary fishmeal by squilla meal
earthworm meal mixture on growth performance, survival rate and body composition
of white leg shrimp, L. vannamei” was conducted during March to May, 2020 in
Aquaculture Laboratory of College of Fisheries science, Junagadh Agricultural
University, Veraval. The objective of this research was to determine the effect of
replacement of fishmeal by squilla meal and earthworm meal in the diet of L.
vannamei post larvae. Six experimental diets were formulated and prepared. 35%
protein level was maintained in all the diets. The control diet was prepared without
squilla meal and earthworm meal, while the treatment containing 20%, 40%, 60%,
80% and 100% squilla meal and earthworm meal mixture were prepared and fed to L.
vannamei at 10% body weight four times in a day for 60 days. The data pertaining to
growth, survival rate, feed conversion ratio and protein efficiency ratio of L.
vannamei were evaluated. L. vannamei post larvae (average weight 0.0155 g) were
stocked at a density of 20 nos. in each18 aquarium tanks. The highest weight gain and
SGR were recorded in treatment T6 compared to other treatments. 100% survival rate
was recorded in all treatments. The lowest FCR and higher PER were recorded in
treatment T6 (100% squilla meal and earthworm meal). The result of the present
investigation revealed that replacement of squilla meal and earthworm meal
significantly affected the weight gain, SGR, survival rate, FCR and PER of L.
vannamei.