علوم زیستی دریا
Ashkan Banan; Mohammad Reza Kalbasi Masjidshahi; Mahmoud Bahmani; Mohammad Ali Yazdani Sadati
Abstract
The present study aimed to investigate effects of colored light and tank color on stress response of juvenile beluga, Huso huso, including the measurement of some sero-haematological parameters (Hemoglobin, hematocrit, cortisol, glucose, etc.) and carcass chemical analysis. The study was conducted at ...
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The present study aimed to investigate effects of colored light and tank color on stress response of juvenile beluga, Huso huso, including the measurement of some sero-haematological parameters (Hemoglobin, hematocrit, cortisol, glucose, etc.) and carcass chemical analysis. The study was conducted at International Sturgeon Research Institute in Rasht, Gilan, using 64 specimens for colored light treatments with initial weight 98.83 ± 1.42 (mean ± SE) g which were reared (in groups of 8) under white, red, green and blue light and using 48 specimens for tank color treatments with initial weight 98.46 ± 1.17 (mean ± SE) g which were reared (in groups of 8) in white, black and blue tanks, all for 12 weeks. Based on the obtained results, cortisol levels in fish reared under red and green lights were significantly higher so much so that in addition to stress and light color effects, their interaction was also significant (P< 0.05). The results also depicted that cortisol levels in fish reared in black tank were significantly lower so much so that in addition to stress and tank color effects, their interaction was also significant (P< 0.05). However, in regard to the other parameters- hemoglobin, hematocrit and carcass chemical analysis- no significant differences were observed. Reviewing the obtained results demonstrates that blue light and black tank by establishing comfort in beluga juveniles have positive significant effects on physiological conditions and spell better stress response.