Effects of black mustard ( Brassica nigra ) seed oil on growth performance, digestive enzyme activities and immune responses in rainbow trout ( Oncorhynchus mykiss )

2021 ◽  
Author(s):  
Masoud A. S. Lakwani ◽  
Osman Nezih Kenanoğlu ◽  
Yiğit Taştan ◽  
Soner Bilen
Keyword(s):  
Rainbow Trout ◽  
Immune Responses ◽  
Oncorhynchus Mykiss ◽  
Growth Performance ◽  
Enzyme Activities ◽  
Seed Oil ◽  
Digestive Enzyme ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Black Mustard ◽  
Digestive Enzyme Activities

Digestive enzyme activities in Adriatic sturgeon Acipenser naccarii and rainbow trout Oncorhynchus mykiss. A comparative study

Aquaculture ◽  
2005 ◽  
Vol 250 (1-2) ◽  
pp. 391-398 ◽  
Author(s):  
M. Furné ◽  
M.C. Hidalgo ◽  
A. López ◽  
M. García-Gallego ◽  
A.E. Morales ◽  
...  
Keyword(s):  
Rainbow Trout ◽  
Comparative Study ◽  
Oncorhynchus Mykiss ◽  
Enzyme Activities ◽  
Digestive Enzyme ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Digestive Enzyme Activities

Effects of different photoperiods on digestive enzyme activities in rainbow trout (Oncorhynchus mykiss) alevin and fry

2016 ◽  
Vol 94 (6) ◽  
pp. 435-442 ◽  
Author(s):  
Fereshteh Ramzanzadeh ◽  
Sakineh Yeganeh ◽  
Khosro JaniKhalili ◽  
Seyedeh Sedigheh Babaei
Keyword(s):  
Enzyme Activity ◽  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Enzyme Activities ◽  
Digestive Enzyme ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
First Feeding ◽  
Significant Difference ◽  
Digestive Enzyme Activities ◽  
L 14

The aim of this study was to investigate the ontogeny of digestive enzymes and effects of photoperiod on pancreatic enzyme activity in rainbow trout (Oncorhynchus mykiss (Walbaum, 1792)) alevin and fry. After hatching, 3600 individuals of first-feeding alevin with a mean (±SD) mass of 119 ± 0.01 mg were reared in plastic tanks at four photoperiod levels (llight (L) : dark (D) cycle) for 6 weeks. Each replicate contained 300 alevin. Photoperiod treatments consisted of 14 h L : 10 h D, 10 h L : 14 h D, 4 h L : 20 h D, and 24 h L : 0 h D. During the rearing period, environmental variables including water temperature, oxygen, and pH were checked. Random sampling of alevin and fry was done at 0, 1, 3, 5, 8, 10, 15, 20, 25, 30, 39, and 44 days after the beginning of the first feeding (equal to 18, 19, 23, 25, 28, 30, 35, 40, 45, 50, 58, 63 days post hatching (dph)). The digestive enzyme activities in alevin and fry had a similar variation trend with age at all photoperiod levels. The specific activities of trypsin, chymotrypsin, and α-amylase at 24 h L : 0 h D were significantly higher than other treatments, but there was no significant difference in specific activity of lipase among treatments. The results demonstrated that growth, feeding efficiency, and digestive enzyme activity improved with longer exposure to photoperiod in rearing conditions.

scholarly journals Effect of Dietary Supplementation of Inulin on Growth Performance, Digestion Enzyme Activities and Antioxidant Status of Rainbow Trout (Oncorhynchus mykiss)

2019 ◽  
Vol 7 (9) ◽  
pp. 1344 ◽  
Author(s):  
Arzu Özlüer Hunt ◽  
Mükereem Çetinkaya ◽  
Ferbal Özkan Yılmaz ◽  
Metin Yıldırım ◽  
Mehmet Berkoz ◽  
...  
Keyword(s):  
Rainbow Trout ◽  
Growth Performance ◽  
Enzyme Activities ◽  
Antioxidant Status ◽  
Digestive Enzyme ◽  
Conversion Ratio ◽  
Control Group ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Final Weight ◽  
Digestive Enzyme Activities

The present study investigated the effects of the prebiotic inulin on the growth parameters, digestive enzyme activities and antioxidant status of rainbow trout (Oncorhynchus mykiss). After acclimation, fish (34±0.22 g; n = 135) were assigned into 9 tanks (15 fish per tank) and triplicate groups were fed a control diet (G-0) or diets containing 1% (G-1) or 2% (G-2) inulin. At the end of the trial (8 weeks), growth factors (final weight, weight gain, specific growth rate (SGR), food conversion ratio (FCR), protein efficiency ratio (PER), Economic conversion ratio (ECR), digestive enzyme activities (pepsin, trypsin, amylase and lipase) and antioxidant status superoxide dismutase (SOD), catalase (CAT) and malondialdehyde (MDA) level of liver tissue were assessed. At the end of the study highest survival rate was observed in the fish fed with 1% G-1 inulin group. Similarly, digestive enzyme activities were significantly higher dietary G-1 group. Subsequently, elevated growth performance (final weight, SGR and FCR) was observed in trout fed with 1% compared to the control group. The effect of the dietary inulin on digestion was partly observed by assaying the activity of pepsin, intestinal amylase, trypsin and lipase. Apart from pepsin activity, results indicated that dietary supplementation of inulin is beneficial and may also have differential effects upon digestive enzyme activities. Antioxidant enzyme activity of SOD and CAT in liver tissue was generally higher in the supplemented inulin diets than in the control and significantly higher in the 1% inulin group. A significant decrease in MDA level of tissue was observed in all inulin supplemented groups when compared to the control group. These results indicate that inulin be considered as a beneficial dietary supplement for growth performance, digestive enzyme activities and antioxidant status of rainbow trout.

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