RT - Journal Article T1 - Growth performance of rainbow trout (Oncorhynchus mykiss) with respect to nutritional factors in north Iran (Haraz River) JF - IFRO YR - 2014 JO - IFRO VO - 13 IS - 3 UR - http://jifro.ir/article-1-1709-en.html SP - 509 EP - 521 K1 - Rainbow trout K1 - Growth K1 - Haraz K1 - Production AB - Monthly samples of six fish farms from January 2010 to December 2010 in the northern Iran, Haraz River, were used to determine relationship between chemical parameters of main water, inlet and outlet and their effects on fish growth and production. Results revealed that concentration of nutrients in outlet was more than that of inlet of farms and statistical analysis showed that there were significant differences between stations (p0.05) in different months Correlation between daily growth, SGR, FCR, production and chemical parameters of water were analyzed by Pearson Correlation. The results revealed negative correlation (α= 0.01) between nitrite and daily growth (P=0.004, Pearson Correlation=-0.24), ammonium and SGR (P=0.0001, Pearson Correlation=-0.272), although there were no correlation for FCR, and nutritional parameters (p>0.05). LA eng UL http://jifro.ir/article-1-1709-en.html M3 ER -