Changes in growth and amino acid composition of Rutilus frisii kutum during larval development

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Abstract

The present study investigated changes in growth and amino acid composition Kutum
Rutilus frisii kutum during larval development. For this purpose, the periodic sampling from
larvae obtained from breeders propagation was carried out at the fish aquaculture center of
Shahid Rajaee in Sari. The samples were obtained at 1, 3, 7, 10, 15, 20, 25, 30, 35, 40 and 50
days after hatching (DAH). The result of larvae growth showed that mean initial and final
length of Kutum (1 DAH, 50 DAH) were 8.47±0.02mm and 35.34±0.41mm, respectively.
Initial and final weights were 4.02±0.01mg and 483.33±1.11mg, respectively. The
composition of total amino acids of Kutum larvae changed significantly during ontogeny.
High correlations were found between rotifers and dry food but correlations dry food was
higher than that rotifer. No major imbalance was found in essential amino acids profile of the
diet of fish larvae. Nevertheless, low correlation of rotifer to dry food in rotifer AA nutritional
balances was less than dry food. During this study, methionine, lysine, arginine, threonine and
histidine appeared to be limiting amino acids. These fatty acids showed the significant
difference between the amino acid profile in larva and the diet.
*Corresponding author

Keywords

Iranian Scientific Fisheries Journal
Volume 21, Issue 1 - Serial Number 78
July and August 2012
Pages 65-78

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