Abstract
In this study, DNA damage in hybrid tilapia exposed to the short-transport process has been investigated. Gill samples were taken from tilapia which after immediately from the transport process (t0 group), after 6 hours from transport process (t6 group), after 12 hours from transport process (t12 group), after 24 hours from transport process (t24 group) and not applied transport process (control group) have been investigated and the results have been compared as statistically. The Damage frequency (%), Arbitrary Unit and Genetic Damage Index (%) were evaluated in gill cells of tilapia. As a result of the study, it is determined that highest the damage frequencies (%) as 69.00±4.58 and 66.00±3.00 were significantly observed in t0 and t6 groups respectively (P
Highlights
In fish farming, transfer covers different time procedures
The formation of reactive oxygen species (ROS) often derives from a stress event (Halliwell & Gutteridge, 1999).These products are biologically generated during metabolism in stress conditions, their synthesis is greater than the ability of cells to remove them, leading to lipid peroxidation, protein carbonyls’ formation, DNA damage and cell death( Davies, 1995; Winston & DiGiulio, 1991).One of the most important ROS is the superoxide radical, which reacts with nitric oxide giving rise to peroxynitrite, a potent oxidant that may oxidize proteins, lipids and DNA
The revealed rise in the DNA damage in the fish subjected to transportation compared to the parameters in the fish before the experiment suggests that the changes in the gill cells are determined by the cortisol induced damage of the chromosome DNA
Summary
Transfer covers different time procedures. In addition, keeping stress at a minimum for fish businesses is very important for the welfare of the creature. The difficult situations in which aquatic organisms remain due to environmental conditions cause oxidative stress in the living thing. This increases the risk of fish getting sick and bacterial infections (Sanz et al, 2012). Due to metabolic activity in fish transfers, the amount of nitrogenous compounds in the transport water is toxic to fish. In this context, the amount of non-ionized ammonia (NH3) should be less than 0.2 mg/l under cultivation and transportation conditions. The amount of non-ionized ammonia (NH3) should be less than 0.2 mg/l under cultivation and transportation conditions When this value is exceeded, toxication occurs in fish (Boyd & Tucker, 1988). DNA damage in hybrid tilapia exposed to the short-transport process has been investigated
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