Farklı tank renklerinin gökkuşağı alabalığı (Oncorhynchus mykiss Walbaum, 1792) yavrularının büyüme performansı üzerine etkisi

Üstündağ, Mustafa

The effects of vitamin A and E supplementation into the female broodstock diets of Rainbow Trout Oncorhyinchus mykiss W on the fecundity and egg quality parameters

Bilgüven, Murat

This study investigated the effects of different levels of vitamins A and E inclusion in diets on feclllldity, egg fertilization and hatching rate infemale brood fish of rainbow trout (Oncorhynchus mykiss, W.). In this respects 7 diets including control diets (no vitamin A and E) containing two fixed amollllt of vitamin A with increasing doses of vitamin E (50, 100 ve 150 mg kg-1 in diets containing fixed amormt of vitamin A). Total number of 350 female and 70 male brood fish that had average mean body weight of 2-3 kg and 3+ aged stock were employed in this investigation. A total of 50 female and 10 male brood fish was stocked into each experimental concrete ponds. Investigation lasted in 70 days and randomly selected 15 female brood fish were spavvned for eggs at the end of the study. Th...

The effects of fish oil replacement by vegetable oils on growth performance and fatty acid profile of rainbow trout: Re-feeding with fish oil finishing diet improved the fatty acid composition

Kenan, Engin

The present study aimed to demonstrate the effects of feeding vegetable oil (VO)-based diets and their blends on growth, feed utilization and fatty acid (FA) profile in rainbow trout, Oncorhynchus mykiss. Juveniles were fed five experimental diets in which dietary fish oil (FO diet containing anchovy oil) was totally or partially replaced by cottonseed oil (CSO), canola oil (CO), MIX1 (50% FO, 25% CSO and 25% CO) and MIX2 (50% CSO and 50% CO) in a grow-out period for 12 weeks. Afterwards, all fish were switched to a diet containing 100% FO diet for a further 12 weeks to determine the progressive recovery of fatty acid (FA) profile of rainbow trout. Results showed that total and/or partial replacement of FO did not negatively affect growth and feed utilization. Feeding VOs significantly red...

Effects of Dietary Nucleotide Yeast on Immune Responses and Antioxidant Enzyme Activities of Rainbow Trout Juveniles (Oncorhynchus mykiss)

HUNT, ARZU ÖZLÜER | YILMAZ, FERBAL ÖZKAN | ENGİN, KENAN | YALIN, SERAP

This study aimed at demonstrating the effects of dietary supplementation of nucleotide yeast base protein (Nu-Pro®) (NP) on the antioxidant enzyme activities and immune response in liver and blood tissues of rainbow trout (Oncorhynchus mykiss). Fish with an average initial weight of 27.75±0.26 g were randomly assigned to four groups with three replicates. Throughout the 60 day grow-out period the control group was fed a fish meal based basal diet, and three other groups were fed diets in which 20 (NP 20), 40 (NP 40) and 60 % (NP 60) fish meal was substituted with nucleotide (Nu-Pro® (NP) yeast). There were no significant changes of superoxide dismutase (SOD) and catalase (CAT) activities in liver among the experimental groups. A significant decrease (P

Effects of Dietary Cottonseed and/or Canola Oil Inclusion on the Growth Performance, FA Composition and Organ Histology of the Juvenile Rainbow Trout, Oncorhynchus mykiss

Engin, Kenan

This study aimed at demonstrating the effects of total and 50% dietary fish oil replacement by cotton seed and canola oils and a mixture of these vegetable oils (VOs) on growth, tissue fatty acid composition and histology of digestive organs in the juvenile rainbow trout for 84 days. Five iso-nitrogenous and lipidic diets were formulated to replace dietary fish oil (FO) totally by cotton seed oil (CSO), canola oil (CO) and an equal or 50% FO/ 50% VO mixture. Duplicate groups of 50 fish (~15 g) were fed two times daily to apparent satiation. Growth performance, feed efficiency and viscerosomatic index were not influenced by dietary treatments (P>0.05). However, hepatosomatic index was significantly higher (P