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The effect of partial replacing of dietary fish oil with beef tallow and canola oil on hematological parameters of rainbow trout (Oncorhynchus mykiss)
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Sepideh Alami1   , Sarah Jorjani * , Afshin Ghelichi1 , Rezvanollah Kazemi3 , Zahra Ghiasvand4 |
1- Department of Fisheries, Azadshahr Branch, Islamic Azad University, Azadshahr, Iran
Department of Fisheries, Azadshahr Branch, Islamic Azad University, Azadshahr, Iran, Department of Fisheries, Azadshahr Branch, Islamic Azad University, Azadshahr, Iran , sarahjorjani@yahoo.com
3- International Sturgeon Research Institute, Agricultural Research, Education and Extenshion Organization (AREEO), Rasht, Iran
4- Azadshahr Branch- Islamic Azad University- Azadshahr- Iran |
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Abstract: (665 Views) |
| The aim of this study was to investigate the effect of replacing beef tallow and canola oil with dietary fish oil on hematological parameters of rainbow trout (Oncorhynchus mykiss). For this purpose, 250 fish with an average weight of about 20 grams were selected and randomly with 3 replications as: treatment 1 or control (diet containing 100% fish oil), treatment 2 (diet containing 50% fish oil and 50% beef tallow, treatment 3 (diet containing 50% fish oil and 50% canola oil) and treatment 4 (diet containing 50% fish oil, 25% beef tallow and 25% canola oil) were treated in a 500 liter fiberglass basin. The fish were fed twice for 90 days according to the feeding tables. At the end of the period, blood samples were taken from the caudal vein and blood indices were measured. The highest count of red blood cells and hematocrit percentage belonged to the control treatment and the lowest amount of these was observed in treatment 3. The results of the present study showed that the percentage of lymphocytes in the control treatment was significantly higher than other treatments. No significant difference was observed in other measured hematological parameters. According to growth performances and hematological parameters, it is possible to replace 25% beef tallow and 25% canola oil instead of fish oil in the diet of rainbow trout. |
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| Keywords: Rainbow trout, Hematology, Fish oil, Beef tallow, Canola oil |
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Full-Text [PDF 732 kb]
(125 Downloads)
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Type of Study: Research |
Subject:
Special
Received: 2021/07/7 | Accepted: 2021/08/3 | Published: 2023/12/22
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