Effect of Dietary Lettuce (Lactuca sativa) on Growth Indices and Body Composition of Caspian Kutum (Rutilus kutum)

Document Type : Research Paper

Authors

1 Professor, Department of Fisheries, Faculty of Natural Resources, University of Tehran, Karaj, Iran.

2 M.Sc. Graduate, Department of Fisheries, Faculty of Natural Resources, University of Tehran, Karaj, Iran.

3 Associate professor, Faculty of Environment, University of Tehran, Tehran, Iran.

Abstract

A completely randomized design was conducted to determine the effect of dietary lettuce (Latuca sativa) leaves as plant protein on growth indices of Caspian kutum (Rutilus kutum).Four levels (percent) of dried leaves lettuce, including A (control), B, C and D (0, 4, 8 and 12, respectively), made up experimental treatments for replacing with fish meal, wheat and oat at the kutum diet. Growth indices were significantly different among treatments (P<0.05). Food conversion ratio (FCR), food protein efficiency (FPE) and weight gain (WG) rates in treatment C were significantly (P<0.05) higher than other treatments. Specific growth rate in treatment C was higher than other treatments. The highest mortality rate was recorded at treatment B (68%) and this rate in treatment C was least with the rate of 98 percent. The results indicated that dietary lettuce with the rates of between 8-10% would be usable diet for culture of Caspian kutum without any negative effect on its growth.

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Journal of Fisheries
Volume 70, Issue 4
March 2018
Pages 376-385

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