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Abstract
Fish is the most indispensable source of proteins for individuals and have high nutritional value. On the other hand, the fish culturing raised issues of fish health due to close contact between the aquatic environment and the fish pathogens. So, the aim of the current study was to identify the bacterial pathogens and screen the injured Rainbow trout rearing in different trout hatcheries run under fisheries department of the government of Azad Jammu and Kashmir, Pakistan. Seven bacterial pathogens such as Shigella flexneri, Enterobacter amnigenus, Salmonella Typhimurium, Serratia odorifera, Pseudomonas aeruginosa, Streptococcus pyogenes, and Bacillus cereus were isolated and identified. Results revealed that the injury of fish specimens was due to overcrowding. Instead of rainbow coloration, specimens have darker black in color. The water of ponds was not clean and clear and such conditions was because of the greater quantity of feed thrown in the water. It was concluded that poor hygienic water condition and overloading allowed the opportunistic bacterial contaminations to succeed which cause a serious threat to hatcheries.
Highlights
Fish is an active, most important source of food for human beings that meet up around 60% of the world’s demand for high-quality protein
Rainbow trout samples were collected from Pattika, Salkhalan, Kuttan, Dawarian, and Kail Sari hatcheries, respectively
Some signs and symptoms were observed such as hemorrhaging of skin and internal organs, bulging eyes, swollen abdomens, reddish tints/spots to eyes, gills, skin, and fins, and abnormal behavior, respectively (Figure 2)
Summary
Most important source of food for human beings that meet up around 60% of the world’s demand for high-quality protein. Most of the emerging countries takings 30% of their yearly protein from fish (Abisoye et al, 2011). Owing to low fat and a high protein and vitamins food, fish has gained rapid attention (FAO and WHO, 2011). 3 pp.607614 countries, freshwater fishery plays a significant role to replace the need of meat of high nutritional value (Hussain et al, 2011; Rubbani et al, 2011) and a ready source of income for smallholder farming sector (Smith and Yoshida, 2000). Due to over-exploitation, fish from freshwater and marine sources are in the severe waning (Limburg et al, 2011)
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