COMMON FISH DISEASES ASSOCIATED WITH NUTRIENT DEFICIENCY IN FEED.

Feed must be balanced in all essential nutrients in terms of carbohydrate,protein,fat and oil. Vitamins and minerals are also essential for growth,balance and total health status of fish.The various component manifest different signs when absent in feed,the most prominent sign is stunted growth,delayed harvest s=,reduced survival rate.Vitamins and minerals in feed are essential to regulate metabolism,thus any deficiency results in ill health,imbalance and deformations. Scoliosis refers to skeletal deformations in the body of fish.The fish is bent backwards,head tilted and skin peeling.This condition is as a result of vitamin c deficiency, it also occurs when calcium or phosphorus is also lacking in feed.Skeletal deformations can also result from contamination of pond with heavy metals such as mercury. Calcium and phosphorus deficiency could also result in "running horse disease"; where fish swim violently in groups around sides of pond in uncoordinated manner.Fish could also appear darkened(burnt out) or sometimes black,these fish have smaller bodies and big head.This condition is linked to anaemia,and has been traced to incomplete feed. Fish feed must be balanced for the value to be noticed ,hence nutrients must be properly balanced and mixed. Atovi premix is an essential part of feed,its complete with needed nutrients at required levels. Atovi premix ensures growth and early harvest of fish.The premix ensures a blend and perfect balance of the feed,it enhances the metabolism of feed ensuring proper absorption and reduce amount of waste.The use of atovi help prevent build up of nitrogenous waste thus purifies pond,there is a balance in aigae bloom,hence no death of micro organisms in filter.The atovi premix ensures proper inter-cellular function,hence there is no incidence of diseases in fish fed atovi premix.

The role of water in fish farming.

Water is the natural habitat of fish thus for successful farming venture,the quality must be monitored and controlled.The growth of any fish depends on the water parameters,feeding protocol,feed composition and genetic potential of the fish specie. The sources of water for the fish farming could be any of the following; wells,dams,boreholes ,sea/lagoon and streams.The system of farming intended will dictate the source of water to be used.The earthen pond usually get water from streams,sea/lagoon and channeled springs while the concrete ponds are filled either from wells,boreholes or dams.The most important factor to consider is the quality of the water source. Water for fish farming must possess the following qualities; 1) The PH must be between 7-9,not acidic or too alkaline. 2)The water must be clean and free from contaminants/pollutants such as oil,chemicals,paints or heavy metals. 3)It must be odorless,free from scumb or foam. 4)It must contain enough dissolved oxygen 4mg/litre. 5)It must have a temperature of between 25-32 degree . 6) The carbon dioxide must not be less than 5mg/litre. 7)Ammonia level 0.05mg/litre. 8)Nitrate not less than 50mg/litre. 9)Nitrite not less than 0.30mg/litre. Water quality should be checked at regular intervals using a water kit and necessary adjustment made,a change in any of the water parameters leads to stress in the fish which could lead to severe loses. Oxygen a major index of water quality needs regular monitoring and balancing.The reduced and increased levels of oxygen has a bad effect on the fish.When oxygen level is depleted in the pond,it leads to suffocation and death of the fish,while supersaturation leads togas bubble disease in fish.The supersaturation usually occurs in algae bloom,where there is rapid photosynthesis resulting in small bubbles accumulating in fish intestines,muscles and gills causing the fish to float. The management practices also hamper on the health of the fish,so these must also be taken into consideration in fish farming.