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The effect of dietary fatty acid composition on growth performance and some hepatopancreatic enzymes under temperature stress and hypoxia in white shrimp, Litopenaeus vannamei
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Samira Mobaraki1   , Narges Javadzadeh * , Hadide Mabudi1 , Mahmoud Hafezieh3 , Mojghan Khodadadi1 |
1- Department of Fisheries, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran.
Department of Fisheries, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran., Department of Fisheries, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran. , nargesjavadzadeh@yahoo.com
3- Iranian Fisheries Science Research Institute, Agricultural Research Education and Extension Organization (AREEO), Tehran, Iran. |
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Abstract: (616 Views) |
| This study aimed to investigate the effect of dietary fatty acid composition on growth performance and some hepatopancreatic enzymes under temperature stress and hypoxia in western white shrimp (Litopenaeus vannamei). For this purpose, 27 tanks with a volume of 300 liters, the density of 15 shrimps with 3 types of diets under 3 stress treatments (1: no challenge to environmental stresses; 2: with hypoxic stress (2±1 ppm); 3: with increasing temperature stress (36±2 °C). After the end of the experimental period, the highest survival rates in treatments 1 and 3 were 91.11 and 86.67%, respectively. The obtained results showed that the consumption of diet 1 compared to diet 2 shows a 90% survival rate. There was a significant difference in specific growth rate between treatments so that the highest rate was obtained in treatment 1 and the lowest in treatment 2 (p<0.05). The results of the physical and chemical parameters of water on different days showed that there was no significant difference between different treatments (p<0.05).The results of aspartate amino transferase (AST) in different treatments showed that there is a significant difference between the amount of AST in different diets before and after environmental stress (p>0.05). In shrimp fed with diet 2, the amount of enzyme during temperature stress (285.83±17.7 IUL) showed the highest increase in the amount of enzyme titer, which was more than 3 times the amount of enzyme in pre-stress conditions. Based on the results, the amount of alanine amino transferase (ALT) in shrimp fed with diets 2 and 3 increased sharply. Also, the measurement results of this enzyme in different treatments were significantly different (p>0.05). Generally, it can be concluded that shrimp fed a diet with 7.02% of total fat, total saturated fatty acids (5 g per 100 g of food), and total unsaturated fatty acids (13 g per 100 g of food) had the highest survival rate and higher specific growth under adverse environmental conditions. |
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| Keywords: Fatty Acid, Growth, Survival, Environmental Stress, Litopenaeus vannamei. |
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Full-Text [PDF 367 kb]
(132 Downloads)
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Type of Study: Research |
Subject:
Special
Received: 2021/06/18 | Accepted: 2021/08/19 | Published: 2024/09/22
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