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Effect of different feeding rates on feed intake, growth and nutritional performance in juvenile Persian sturgeon (Acipenser persicus) at high temperature
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Bahram Falahatkar1   , Shapour Gholami2 , Eshahgh Rasouli Kargar2 , Iraj Efatpanah1 |
1- University of Guilan
2- Dr. Yousefpour Marine Fishes Restocking and Genetic Conservation Center |
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Abstract: (806 Views) |
| The present study aimed to investigate the effect of different feeding rates in summer condition (higher than 25ºC) on the growth and feed intake of juvenile Persian sturgeon (Acipenser persicus). For this purpose, four feeding rates including 1, 1.5, and 2% of body weight, and also based on appetite until satiety were considered in three replicates. A total of 20 juveniles with an average weight of 19.3±0.1 g were distributed in each concrete tank with a volume of 800 L and fed daily at 5, 11, 17, and 23 for 60 days. After 60 days, the results showed that in most of the measured parameters including final weight, final length, weight gain, body weight increase, and specific growth rate, the highest values were observed in the fish fed to satiation. Moreover, the amount of voluntary feed intake (as %/day) was observed in the satiety level and the lowest feed conversion ratio was measured in the fish fed with 1.5% feeding rate. There was no significant difference in condition factor among treatments. Based on the voluntary feed intake, the results showed that fish in this condition need 2.4% of feeding rate per day. This study showed that it is possible to easily culture and feed juvenile Persian sturgeon in summer condition at high temperatures without any problem and to achieve the highest growth and feed efficiency, the feeding level of 2.4% of body weight per day is recommended in the present experimental conditions. |
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| Keywords: Persian sturgeon, Summer season, Voluntary feed intake, Production yield |
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Full-Text [PDF 632 kb]
(793 Downloads)
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Type of Study: Research |
Subject:
تغذيه
Received: 2022/03/26 | Accepted: 2020/07/31 | Published: 2023/04/15
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