The effects of light colour and photoperiod on hematological parameters in Sterlet, Acipenser ruthenus, broodstock

Authors

Abstract

This study investigated the effects of light colour and photoperiod on
hematological parameters in female Sterlet, Acipenser ruthenus, broodstock. A
total of 36 fish were reared for 6 months under four treatments; two light colours
(blue & red) and two light regimes (18L:6D &6L:18D) with light intensity of 150
Luxin three replicates. Blood parameters including white blood cells (WBC), red
blood cells (RBC), haemoglobin concentration (Hb), haematocritpercent (Hct),
mean corpuscular volume (MCV), mean corpuscular haemoglobin (MCH) and
mean corpuscular haemoglobin concentration (MCHC) were measured during the
three (Previtellogenesis, VitellogenesisandFinal maturation) reproductive stages.
The results of this study revealed no significant difference (P >0.05) in different
haematological parameters among the treatments. However, the levels of Hct, Hb,
MCV, MCH, and MCHC were considerably (P<0.05) higher in the middle of
reproductive period (vitellogenesis) compared to the other reproductive stages.
The concentration of RBC were however similar in three reproductive stages (P
>0.05). The results suggest that reproductive stage has more effect on
hematological parameters compared with light changes.

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