This study aims to examine the effects of magnetic water on behaviour, performance and some physiological parameters of Nile tilapia fish and the physicochemical properties of water. Forty-eight Nile Tilapia fish with 30.95±1.75g in weight were reared under normoxia conditions and classified into two groups (n=12/aquarium, 2 replicates). Group 1: fish raised in non-magnetized water (control). Group 2: fish raised in magnetic water using a magnetic field, 18000 Gauss (MW). Fish performance, behavioural and physiological responses were examined as well as water quality parameters of the fish aquarium were measured. At the end of the experiment, fish (n=6/aquarium, 2 replicates) of two groups were exposed to 8 hours of hypoxia. Fish behaviour was recorded and water quality parameters of the fish aquarium were measured. Results revealed that the body weight and body weight gain of fish were significantly (p<0.05) increased, however, feed conversion ratio was decreased for fish reared under the use of water magnetization. Magnetic water fish showed high comfort behavioural activities with low surfacing and eliminative behaviours. Water magnetization improved significantly the dissolved oxygen, ammonia, and turbidity of the fish aquarium. Magnetic water fish showed high total protein and globulin with a lower plasma glutathione reductase (GSH). Fish of magnetic water showed a significant increase in resting and a decrease in surfacing, chasing, and biting with lower plasma cortisol when exposed to hypoxia condition. The dissolved oxygen of magnetic water was significantly more than the dissolved oxygen of normal water after hypoxia exposure. These findings suggest that using magnetic water has significant performance and behaviour benefits, as well as reduced hypoxia stress effects in Nile tilapia fish.
Berseem is a conventional and cheapest green forage distributed all over the world. It is a good source of fiber and high nutritive value thus, it used as adlibitum feed for young growing rabbit. Additionally, rabbit is characterized by hind gut fermenter animals through its caecal microbial fermentation as well as rabbit has strong accommodation to high level of fiber diets that increasing the digestive efficiency moreover, it help the rabbits in microbial digestion and production of an energetic substance (volatile fatty acids &high quality proteins). Therefore, this study was applied for examining the outcome of berseem replacement as a cheap green forage by expensive commercial pellets feed in young growing rabbit; by means growth performance, carcass trait, histomorphometric, hematological profiles and behavioural changes. Twenty-four growing male rabbits (white New-Zealand breed) were used and classified into three different groups; two groups of them were supplemented with different two levels of Egyptian green berseem 50% with 50% pellets and berseem 90% with 10% pellets as well as the third group feeds on 100% commercial pellets. The diet was offered to rabbit by rate 4% of their body weight on dry matter basis daily. The study lasted for four weeks. Results showed that, the body weight and weight gain of rabbits were affected by berseem treatments. Moreover, using forage as green Egyptian berseem in rabbit diet with concentrates had a significant effect on feeding and exploration behaviour and a significant increase in total blood protein, globulin, albumin and decrease in A/G ratio. Furthermore, rabbits fed with the mixed diets had lower total cholesterol than those fed with control and they had higher HDL than control group in most blood parameters considered; the values are similar in all groups. Furthermore, there are a significant increase the length of Physiology
A quaculture is one of the significant monetary applications and vital sources of protein for human consumption (Hayatgheib et al., 2020). Fish is a an extremely nourishing food that contains various fundamental supplements like omega3, vitamin D, iodine, and calcium. Also, they are viewed as a source of profits in all countries (FAO, 2020). Nile tilapia (Oreochromis niloticus) is the 2 nd aquaculture type in the world and has a high tolerance to environmental changes, so it is viewed as the principal candidate for creating aquaculture in unusual water sources (Brum et research Article Abstract | A feeding trial for 4 weeks was performed to estimate the impacts of dietary garlic oil and/or ginger oil on the growth performance, physiological responses, and gene expression of Nile tilapia fish (Oreochromis niloticus). A 180-healthy Nile tilapia having an average weight of 50.0±2.24 g was randomly distributed into 6 groups (30 fish/ group/three replicates) as the following: T1 (control group) nourished with the basal diet only, T2 given the basal diet supplemented with 0.5% garlic oil, T3 given the basal diet supplemented with 1% garlic oil, T4 given the basal diet supplemented with 0.5% ginger oil, T5 given the basal diet supplemented with 1% ginger oil, and T6 given the basal diet supplemented with a mixture of 0.5% garlic and 0.5% ginger oil. The fish group received ginger oil in its diet at a 0.5% rate (T4) showed a significant increase of growth performance (overall body weight, weight gain, and specific growth rate) with a lower feed conversion ratio. Besides, garlic oil supplementation on fish diet at a 0.5% rate (T2) improved the overall body weight. The plasma biochemical parameters results indicate that garlic oil and/or ginger oil supplementation on the Nile tilapia diet at different levels raises markedly raises the T4 hormone level and reduces total cholesterol and LDL-cholesterol levels. Moreover, administration of 1% garlic oil and ginger oil (T3 and T5 respectively) and both of them (T6) to the diet of Nile tilapia significantly (P<0.05) reduces the plasma urea and uric acid concentration. The results of gene expression showed that TNF-α and IL-1β genes expression was the highest in the fish supplemented with 1% ginger oil (T5). It is concluded that garlic and/or ginger oil supplementation to the fish diet enhances growth as well as immunostimulant agents and improves the general health of Nile tilapia.
The aim of this study was to conclude the effect of feed frequencies and amount on growth performance, carcass traits, physiological responses and behaviors of broilers chicks. One hundred Ross broiler chicks at 7 days old were randomly assigned into five regimens (20 chicks per each program with two replicate).
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