Araştırma Makalesi

Effects of total replacement of dietary fish oil by vegetable oils on growth performance, nutritional quality and fatty acid profiles of rainbow trout (Oncorhynchus mykiss) at optimum -and high temperature conditions

Cilt: 38 Sayı: 2 15 Haziran 2021
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Effects of total replacement of dietary fish oil by vegetable oils on growth performance, nutritional quality and fatty acid profiles of rainbow trout (Oncorhynchus mykiss) at optimum -and high temperature conditions

Abstract



The present study investigated the effects of total replacement of dietary fish oil by different vegetable oils on growth performance, nutritional quality and fatty acid profiles of rainbow trout (Oncorhynchus mykiss) at optimum -and high temperature conditions. Five iso-nitrogenous and iso-lipidic diets including 100% fish oil and vegetable oils were prepared for rainbow trout fingerlings with an average weight of 11.27±0.01 g. After the fish were fed experimental diets for 9 weeks at the optimum temperature (17.74 ± 0.01 ° C), all groups were fed an FO diet containing only fish oil for 4-weeks at the upper optimum temperature conditions (19.28 ± 0.11°C). In both feeding trials, experimental fish were hand-fed ad libitium twice a day. Results showed that growth performance and feeding efficiency were significantly better (p<0.05) in groups fed by VO-based diets compared to groups fed by FO based diet at optimum temperature. Survival was 100% in CANO, SFO, CO PNO groups and 94.12 ± 3.39% in FO (control) group at the end of the 9 weeks. Growth, feed consumption and survival of fish fed the upper-optimum temperature were significantly differed (p<0.05). In particular, while the survival rate of the groups fed with vegetable oil-based diets at optimum temperature and then fed only fish oil remained 100%, this rate decreased to 54.17 ± 1.39% in the control group. Eicosapentaenoic acid (EPA, 20:5n-3), docosahexaenoic acid (DHA, 22:6n-3) and n-3 PUFA of fish fed by VO based diets were low. When all groups were fed only FO diet for 4 weeks at upper-optimum temperatures, EPA, DHA and n-3 PUFA ratios increased. In addition, after the upper-optimum temperature trial, increases in the nutritional quality indices of fish meat were also detected.


Keywords

Teşekkür

This study was conducted at the Research and Application Center of the Aquaculture and Fisheries Faculty of Sinop University, Turkey. We extend our gratefulness to Osman PARLAK, the Owner of the Kuzey Su Urunleri fish farm, for providing us the fish.

Kaynakça

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Ayrıntılar

Birincil Dil

İngilizce

Konular

Gıda Mühendisliği

Bölüm

Araştırma Makalesi

Yayımlanma Tarihi

15 Haziran 2021

Gönderilme Tarihi

17 Kasım 2020

Kabul Tarihi

18 Mart 2021

Yayımlandığı Sayı

Yıl 2021 Cilt: 38 Sayı: 2

Kaynak Göster

APA
Dernekbaşı, S., Parlak Akyüz, A., & Karayücel, İ. (2021). Effects of total replacement of dietary fish oil by vegetable oils on growth performance, nutritional quality and fatty acid profiles of rainbow trout (Oncorhynchus mykiss) at optimum -and high temperature conditions. Ege Journal of Fisheries and Aquatic Sciences, 38(2), 237-246. https://doi.org/10.12714/egejfas.38.2.14

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