scholarly journals Fishmeal Dietary Replacement up to 50%: A Comparative Study of Two Insect Meals for Rainbow Trout (Oncorhynchus mykiss)

Animals ◽  
2022 ◽  
Vol 12 (2) ◽  
pp. 179
Author(s):  
Federico Melenchón ◽  
Eduardo de Mercado ◽  
Héctor J. Pula ◽  
Gabriel Cardenete ◽  
Fernando G. Barroso ◽  
...  
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
High Efficiency ◽  
Fish Growth ◽  
Human Consumption ◽  
Antioxidant Enzyme Activities ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Food And Agriculture ◽  
Food And Agriculture Organization ◽  
Damage Indicators

The demand of optimal protein for human consumption is growing. The Food and Agriculture Organization (FAO) has highlighted aquaculture as one of the most promising alternatives for this protein supply gap due to the high efficiency of fish growth. However, aquaculture has been facing its own sustainability problem, because its high demand for protein has been traditionally satisfied with the use of fishmeal (FM) as the main source. Some of the most promising and sustainable protein substitutes for FM come from insects. The present manuscript provides insight into an experiment carried out on rainbow trout (Oncorhynchus mykiss) with a 50% replacement of FM with different larvae insect meals: Hermetia illucens (HI), and Tenebrio molitor (TM). TM showed better results for growth, protein utilization and more active digestive function, supported by intestinal histological changes. Liver histology and intermediary metabolism did not show relevant changes between insect meals, while other parameters such as antioxidant enzyme activities and tissue damage indicators showed the potential of insect meals as functional ingredients.

scholarly journals Effects of Dietary Inclusion of Canthaxanthin- and α-Tocopherol-Loaded Liposomes on Growth and Muscle Pigmentation of Rainbow Trout (Oncorhynchus mykiss)

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Tran Quoc Toan ◽  
Viet Anh Dang ◽  
Quoc Long Pham ◽  
Phi Hung Nguyen ◽  
Thu Huong Trinh ◽  
...  
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Fish Muscle ◽  
Fish Growth ◽  
Fish Feed ◽  
Carotenoid Pigment ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Mean Size ◽  
The Difference ◽  
Particle Size Characterization

Dietary inclusion of canthaxanthin, a common carotenoid pigment, has been long practiced in aquaculture to give the favorable flesh color in farmed salmonids. However, carotenoids are associated with limited solubility and poor physicochemical stability, and their dose in fish feed is widely regulated. In this study, we included canthaxanthin- and α-tocopherol-loaded liposomes into fish diets and evaluated the effects of supplemented fish feed on fish growth, color, nutrition, and canthaxanthin deposition in fillets of cultured rainbow trout (Oncorhynchus mykiss). The liposomes were fabricated using lecithin as phospholipids with the initial concentrations (IC = mcanthaxanthin/mlipids, % wt/wt) of canthaxanthin at 0.1%, 0.5%, and 1.0%. Particle size characterization showed that liposome mean sizes were 109.70 ± 6.36, 105.10 ± 8.41, and 109.20 ± 5.66 nm (mean ± SD; n = 3), respectively, corresponding with liposomes synthesized at canthaxanthin IC = 0.1%, IC = 0.5%, and IC = 1%. The polydispersity index (PDI) of all samples remained lower than 0.2. There were no significant differences in the mean size and PDI between blank lecithin liposome and canthaxanthin- and α-tocopherol-loaded liposomes. The encapsulation efficiency of canthaxanthin- and α-tocopherol-loaded liposomes decreased when increasing the concentration of canthaxanthin in lecithin liposomes, with EE% values of IC = 0.1%, IC = 0.5%, and IC = 1% being 85.3 ± 2.1, 72.9 ± 1.8, and 55.3 ± 2.6, respectively. For fish growth, at the end of the experiment, final weight was significantly higher in fish fed with diet supplemented with 1 g/kg canthaxanthin- and α-tocopherol-loaded liposomes (IC = 0.5%) in comparison to other experimental control groups. The difference in color of the salmon muscle was most apparent after two months of feeding. However, after three months, there was no noticeable change in the color score of the fish muscle, indicating saturation of color of the fish muscle. The above results suggest the potential of canthaxanthin- and a-tocopherol-loaded liposomes as the red pigment in fish aquaculture.

scholarly journals Effects of water reuse system on antioxidant enzymes of rainbow trout (Oncorhynchus mykiss w., 1792)

2012 ◽  
Vol 49 (No. 10) ◽  
pp. 373-378 ◽  
Author(s):  
I. Ozmen ◽  
A. Bayir ◽  
M. Cengiz ◽  
A. N Sirkecioglu ◽  
M. Atamanalp
Keyword(s):  
Antioxidant Enzymes ◽  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Water Reuse ◽  
Breeding Systems ◽  
Antioxidant Enzyme Activities ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Flow Through ◽  
Reuse System ◽  
Glucose 6 Phosphate Dehydrogenase

The objective of the present study was to investigate the importance of the antioxidant enzymes; glucose-6-phosphate dehydrogenase (G6PD), glutathione reductase (GR), superoxide dismutase (SOD), glutathione peroxidase (GP) and catalase (CAT) in defense against toxic reactive oxygen species (ROS). For this purpose, comparative studies were performed on the antioxidant enzyme activities in red cells of rainbow trout (Oncorhynchus mykiss) between flow-through and recirculated breeding systems G6PD, GR and SOD activities were found significantly lower in reuse system than flow-through system. But, GP and CAT activities were increased significantly in the erythrocyte of rainbow trout held in reuse water tanks.

scholarly journals Tarçın (Cinnamomum verum) Yağının Gökkuşağı Alabalığı (Oncorhynchus mykiss) Büyüme Performansı ve Kan Parametreleri Üzerine Etkileri

2019 ◽  
Vol 7 (2) ◽  
pp. 370
Author(s):  
Osman Sabri Kesbiç
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Growth Performance ◽  
Blood Parameters ◽  
Serum Glucose ◽  
Fish Growth ◽  
Control Group ◽  
Cinnamon Oil ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Albumin Content

In this study, the effects of supplementation of cinnamon oil on rainbow trout (Oncorhynchus mykiss) feeds on fish growth performance, feed evaluation and blood parameters were investigated. In this scope, experimental diets containing cinnamon oil at 5 different concentrations of 0 mL/kg (TY0), 1 mL/kg (TY1), 2 mL/kg (TY2), 4 mL/kg (TY4) and 10 mL/kg (TY10) were prepared. During the 60 days of the study, the rainbow trout weights of 10,68±0,35 g were used and the experiment was carried out in 100 L volume aquariums with 5 groups of 3 replicate. In the feeding experiment, growth performance and feed utilization of the groups fed with cinnamon oil increased significantly compared to the control group. It was determined that cinnamon oil had significantly increasing effect on erythrocyte, hemoglobin amount and hematocrit ratio in fish. In addition, cinnamon oil decreased the level of serum glucose, triglyceride and cholesterol in the fish, and increased the total protein and albumin content. As a result, feed containing 4 mL/kg of cinnamon oil was affected fish growth performance and blood parameters positively.

scholarly journals Comparative Analysis of Egg Biochemical Composition and Egg Productivity Rainbow Trout (Oncorhynchus mykiss Walbaum, 1792) in Different Stations in Turkey

2021 ◽  
Vol 21 (3) ◽  
pp. 117-127
Author(s):  
Birol Baki ◽  
Dilara Kaya Ozturk ◽  
Serhat Tomgisi
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Rainbow Trout ◽  
Amino Acid ◽  
Oncorhynchus Mykiss ◽  
Egg Quality ◽  
Total Amino Acid ◽  
Human Consumption ◽  
Productivity Analysis ◽  
Rainbow Trout Oncorhynchus Mykiss

In the study, two objectives were selected in determining the quality and efficiency of Oncorhynchus mykiss eggs obtained from different stations: (1) to determine the biochemical, amino and fatty acid composition and egg quality, (2) to study the effect of egg productivity on egg quality. The study was conducted in 5 different production areas which is produces the most rainbow trout eggs in Turkey. Broodstocks over 3 years old were randomly selected from the company. After the egg productivity analysis, biochemical analysis were conducted. The most abundant amino acid in all stations was glutamic acid, followed by leucine, lysine, in that order. Total amino acid and essential amino acid (EAA) values were between 30.40±0.93-44.47±0.43 and 15.69±0.25-23.88±0.07 g/100g, respectively. As a result of analysis of fatty acids, docosahexaenoic acid (DHA), oleic acid and linoleic acid values were higher than other fatty acids. In addition, polyunsaturated (PUFA) values were higher than saturated (SFA) and monounsaturated (MUFA) fatty acid values in the eggs obtained from all stations. Consequently, the amino and fatty acid values of rainbow trout eggs were determined to be sufficient for embryonic development of fish and this values showed rainbow trout eggs as potential source of food for human consumption.

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