TR
EN
Effects of feed rations containing egg powder in different proportions on growth performance, feed utilization, body composition, and survival rate of rainbow trout (Oncorhynchus mykiss Walbaum, 1792) fry
Abstract
This study aims to determine the appropriate egg powder ratio that can be substituted into the fish meal to close the protein deficit without adversely affecting the development performance of rainbow trout fry (Oncorhynchus mykiss) (0.38±0.01 g and 3.55±0.05 cm). Also, the effects of egg powder used as a protein source on rainbow trout feed on growth performance, feed utilization, body composition, and survival rates were investigated. The egg powder ratio in the ration of the groups were arranged to be 0% (Control), 25% (E-25), 50% (E-50), 75% (E-75), and 100% (E-100) of the amount of protein obtained from fish meal. To evaluate their growth performance, fish were fed for 90 days between March and May, and additional feeding was given for 17 days for the challenge test. As a result of the study, when the more than 25% egg powder was added to the ration, the final body weight (FBW), weight gain (WG), weight gain rate (WGR), specific growth rate (SGR), feed intake (FI), and protein efficiency ratio (PER) had a statistically significant difference among the groups (P<0.05). It was determined that the difference between groups was insignificant in terms of condition factor (CF), and the addition of more than 25% egg powder to the ration increased the feed conversion ratio (FCR) statistically and significantly (P<0.05). As a result of the challenge test carried out with two different fish pathogens (Lactococcus garvieae and Yersinia ruckerii), it was determined that the addition of egg powder decreased the survival rate in all groups compared to the control group (P <0.05). As a result, it was concluded that up to 25% of egg powder can be used rainbow trout fry feeds, but continuous feeding with egg powder supplemented feeds may cause fish health problems.
Keywords
Thanks
We thank Cansu YILMAZ TERZİ and Şükrü GÜNEŞ due to their help and support during the study period.
References
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Details
Primary Language
English
Subjects
Food Engineering
Journal Section
Research Article
Publication Date
March 15, 2021
Submission Date
February 19, 2020
Acceptance Date
November 9, 2020
Published in Issue
Year 2021 Volume: 38 Number: 1
APA
Köse, Ö., Arıman Karabulut, H., Kurtoğlu, İ. Z., & Er, A. (2021). Effects of feed rations containing egg powder in different proportions on growth performance, feed utilization, body composition, and survival rate of rainbow trout (Oncorhynchus mykiss Walbaum, 1792) fry. Ege Journal of Fisheries and Aquatic Sciences, 38(1), 69-78. https://doi.org/10.12714/egejfas.38.1.08
Cited By
Dandelion root extract in trout feed and its effects on the physiological performance of Oncorhynchus mykiss and resistance to Lactococcus garvieae infection
Annals of Animal Science
https://doi.org/10.2478/aoas-2023-0072