تأثير رنگ مخزن پرورش روي شاخص‌هاي رشد، پارامتر‌هاي خوني و پاسخ‌هاي فيزيولوژيك ماهي اسكار (Astronotus ocellatus Agassiz, 1831)

The effect of tank color on growth index, hematological parameters and physiological responses of Oscar fish (Astronotus ocellatus Agassiz, 1831

در اﯾﻦ ﻣﻄﺎﻟﻌﻪ، اﺛﺮ رﻧﮓﻫﺎي ﻣﺘﻔﺎوت ﺗﺎﻧﮏ ﭘﺮورﺷﯽ ﺑﺮ ﺷﺎﺧﺺﻫﺎي رﺷﺪ، ﺧﻮنﺷﻨﺎﺳـﯽ، اﺳـﺘﺮس و ﺑﯿﻮﺷـﯿﻤﯿﺎﯾﯽ ﭘﻼﺳـﻤﺎ ﻣـﺎﻫﯽ اﺳـﮑﺎر ﻣـﻮرد ﺑﺮرﺳﯽ ﻗﺮار ﮔﺮﻓﺖ. آﮐﻮارﯾﻮمﻫﺎ ﺑﻪ رﻧﮓﻫﺎي آﺑﯽ، ﺳﻔﯿﺪ، زرد و ﻗﺮﻣﺰ ﺑﺮاي اﯾﻦ آزﻣﺎﯾﺶ در ﻧﻈﺮ ﮔﺮﻓﺘﻪ ﺷﺪﻧﺪ. ﻃﻮل دوره اﯾﻦ ﺗﺤﻘﯿﻖ 8 ﻫﻔﺘﻪ ﺑـﻮد. ﻏﺬادﻫﯽ در ﺣﺪ ﺳﯿﺮي و در 3 وﻋﺪه در ﺳﺎﻋﺎت 12:00 ،7:00 و 17:00 اﻧﺠﺎم ﮔﺮﻓﺖ .ﺑﺎﻻﺗﺮﯾﻦ ﻣﯿﺰان وزن ﻧﻬﺎﯾﯽ در ﺗﯿﻤﺎر ﺑﺎ رﻧـﮓ ﻗﺮﻣـﺰ ﻣﺸـﺎﻫﺪه ﺷﺪ و ﻫﻤﭽﻨﯿﻦ ﻣﯿﺰان ﺿﺮﯾﺐ ﺗﺒﺪﯾﻞ ﻏﺬاﯾﯽ در ﺗﯿﻤﺎر ﻗﺮﻣﺰ ﻧﺴﺒﺖ ﺑﻪ ﺳﺎﯾﺮ ﺗﯿﻤﺎرﻫﺎ ﮐﺎﻫﺶ ﻣﻌﻨﯽ داري را ﻧﺸـﺎن داد )0/05

The effects of tank color background on the growth performances, hematology, stress and biochemical factors of juvenile’s Oscar fish of were studied. The duration of this study was 8 weeks. Fish was fed for 8 weeks to saturation level (7:00; 12:00; 17:00). Feed conversion ratio (FCR) in red treatment was significantly reduced compared to other treatments (P<0.05). White blood cells (WBC) in the yellow treatment was higher than other treatments (P<0.05). The level of cortisol in red and white treatments was lower than other treatments. The highest amount of cortisol was observed in the blue treatment. The results showed that there was a significant difference in the amount of total protein between treatments. The amount of albumin in red treatment was higher than other treatments (P<0.05). The amount of melatonin in red treatment was higher than other treatments. This study showed us using res color tank is more effective than other color, in regarding growth performances, hematological, biochemical and stress factors that is may be due to more and better physiological adaptation of fish to this color.