Comparison of blood factors and growth of Rainbow Trout in brackish water and fresh water

Subject Areas : Marine Biology

Sh. Masaeli ¹ (Faculty of Marine Science &Technology, Islamic Azad University, North Tehran Branch)
H. Hosseinzadeh Sahafi ² (Iranian Fisheries Research Organization)
M. Alizadeh ³ (Iranian Fisheries Research Organization)
H. Negarestan ⁴ (Iranian Fisheries Research Organization)

Received: 2010-04-26 Accepted : 2010-10-08 Published : 2010-12-21

Keywords: Rainbow trout, growth rate, hematological factors, brackish water, fresh water,

Abstract :

In this investigation, Rainbow trout fish's growth rate, blood factors were studied in brackish water (10 ds/m) and fresh water. For doing this research, some 180 young Rainbow trout with a of 47.1 0.1grams were realest in 6 polyethylene tanks with each 1.5m3 water. Two treatments with three replicates were used in this study. At the time of testing, all environmental conditions were almost constants similar. Feeding at the time of rearing for every replicate, with due attention to water temperature and fish biomass was done. Every fifteen days the process of biometry of fish was done and recorded. After 126 days the live fish were transferred to libratory and after biometry of their weight and length, all desired blood factors were measured using blood from their hearth. The results of four biometry processes showed that fish growth in brackish water was significantly increased (p<0.05). With due attention to other treatments amount of WBC, Hb, HCT, MCV, MCH, MCHC, Lymph, Throm, K+   in brackish water showed significant in crease as compared with specimens fresh water (P<0.05) Mono, Neut, Eos, Na+ in brackish water and fresh water did not show any Significant difference. (p>0.05)