Effect of Dietary Lipid Sources on the Growth and Body Fatty Acid Composition of Sea Bass Dicentrarchus labrax L. 1758
HUNT, ARZU ÖZLÜER
This study was carried out in Yumurtalik Marine Research Station, University of Cukurova in Turkey. In this study was aimed to determine the effects of different levels of soybean oil and fish oil on growth and body fatty acid composition of sea bass (Dicentrarchus labrax). Initial mean body weights of test subjects were 4.80±0.25 g. The fish were housed within experimental, 210 l of experimental fiberglass tanks (20 fish/tank). Fish of all groups were fed on five different levels feed a 105 day period. The fish group fed with Diet 1 (12% Fish Oil = FO) followed by Diet 5 (12% Soybean Oil = SBO) showed the highest growth performance. In this study saturated, monounsaturated and polyunsaturated fatty acid changes in all groups were significant (p>0.05). On the basis of these results it can ...
The effects of fish meal replacement by yeast based nucleotides on growth body composition and digestive enzyme activity in rainbow trout juveniles Oncorhynchus mykiss
HUNT, ARZU ÖZLÜER | YILMAZ, FERBAL ÖZKAN | ENGİN, KENAN | YALIN, SERAP | ŞAHİN, NEFİSE ÖZLEN
This 60 day study investigated the effects of organically certified nucleotide yeast-derived protein source (Nu-Pro®) on growth, feed efficiency, fillet proximate composition and digestive enzymes in rainbow trout (Onchorhyncus mykiss). Diets were isonitrogenous and isocaloric. Three experimental diets wherein 20%, 40% and 60% of the fish meal content was replaced by Nu-Pro®, were compared to the control diet in which the crude protein content was anchovy fish meal and corn gluten meal. The rainbow trout (initial weight 27 g/fish) were fed twice daily in 200-l Aqaria. Live weight gain increase ranged from 125-195% in fish fed the experimental diets. Results indicated that up to 40% fish meal protein can be replaced by Nu-Pro® without compromising growth rates, feed efficiency or the fillet...
Comparing the Effects of Feeding a Fish Oil- or a Cod Liver Oil -Based Diet on Growth, Feed Utilization and Muscle Fatty Acid Composition Nile Tilapia (Oreochromis niloticus)
HUNT, ARZU ÖZLÜER | Yılmaz, Ferbal Özkan
The present study was conducted to study the effect of fish oil (FO) and cod liver oil (CLO) as the dietary lipid sources on the growth performance, feed utilization and fatty acid (FA) composition of Oreochromis niloticus. Two isonitrogenous (38% crude protein), isocaloric (18.9 MJ GE/kg) diets containing 8% lipid were formulated. Each diet was fed to triplicate groups of 17 fish with a mean initial body weight of 18.18 ± 0.02 g. Fish were fed with %3 of their body weight two twice daily. The fish were kept at 28±1 °C in 6 square experimental cages (1×1×1.25 m) for 60 days. Results revealed that the source of lipid significantly affect (P
Effects of Dietary L-carnitine Supplementation on Growth, Muscle Fatty acid Composition and Economic Profit of Rainbow Trout (Oncorhynchus mykiss)
HUNT, ARZU ÖZLÜER
In this study, the effect of dietary L-carnitine on growth, proximate and muscle fatty acid compositions of rainbow trout (Oncorhynchus mykiss) were investigated. The fish were fed with diets containing 300 mg kg-1 L-carnitine (LC300), other group was fed with diets containing 600 mg kg-1 L-carnitine (LC600) and control group was not supplementary L-carnitine for 63 days. The weight gain of LC600 fed with L-carnitine supplemented was found to be 7.73% higher than in control group. Feed conversion ratio in LC600 (1.66) and LC300 (1.60) is better than in control group (2.00). L-carnitine supplemented groups would be lower cost of production than control. Economic conversion ratio (ECR) of LC300 (2.71 US.$ kg-1) would represent a saving of 0.44 US.$ kg-1 compared to the control. L-carni...
Transition of wild-caught juvenile pikeperch, Sander lucioperca (Bogustkaya and Naseka, 1996) to dry feed using different types of food.
HUNT, ARZU ÖZLÜER
Wild-caught juvenile pikeperch (Sander lucioperca [Stizostedion lucioperca]; 6.21±0.38 g and 7.80±0.24 cm) were offered different types of food and tested for their transition to dry feed. Eight groups (including control) were fed according to the experimental feeding regime for 28 days. Group A (control) was fed with live Gambusia affinis fries alone. As initial feeding (the first 7 days of the experiment) before transition to dry feed, groups B, C and D were offered live food, whereas groups E and F were offered moist feed (minced bait shrimp meat and minced fish meat, respectively). Groups G and H were offered semi-moist feed (a mixture of fish meat + dry feed and a mixture of bait shrimp meat + dry feed, respectively). To determine their preferences and acceptance of different feeds, s...