Environmental Resources Unit C Animal Wildlife Management Problem Area 3 Fish Management Diagnosing Fish Diseases Lesson 7 Diagnosing Fish Diseases вЂў How many of you have had a cold or the flu lately? вЂў What was some of the symptoms you had? вЂў How did you treat this illness? Terms вЂў вЂў вЂў вЂў вЂў вЂў вЂў Abscess Bacterial disease Bathing Chemical disease Cyst Dipping Environmental disease вЂў вЂў вЂў вЂў вЂў вЂў вЂў Feed additive Fungal disease Hosts Indefinite treatment Infectious disease Lesion Non-infectious disease Terms вЂў вЂў вЂў вЂў Nutritional disease Parasites Parasitic disease Physiological disorders вЂў Prevention вЂў Quarantine вЂў вЂў вЂў вЂў вЂў вЂў Sanitation Symptom Treatment Ulcer Vigor Viral disease Objectives вЂў Identify signs of disease in fish. вЂў Describe the types of fish disease. вЂў Identify methods of preventing and treating fish disease. What are signs of diseases in fish? вЂў Diseases may cause fish to: вЂ“ Stop growing вЂ“ Grow slower вЂ“ Even die вЂў Identifying signs of disease early allows for treatment of disease in time to reduce the losses. вЂў Healthy fish are alert and active. вЂў Unhealthy fish display symptoms of disease. вЂ“ A sign that a disease may exist Common symptoms of disease вЂў Lack of appetite вЂ“ Fish are active eaters. вЂ“ Consume all of the feed rapidly after being fed. вЂ“ A change of eating habits may be a symptom. вЂў Lack of vigor вЂ“ Healthy fish are active and vigorous. вЂ“ Vigor is the movement of fish in the water. Common symptoms of disease вЂў Skin abnormalities вЂ“ Ulcers вЂў Open sores on skin containing pus. вЂ“ Lesions вЂў Result of an injury. вЂ“ Abscess вЂў Area of the skin that is swollen and usually contain pus. вЂ“ Cyst вЂў Pocket in the skin that contains fluid or dead skin. Common symptoms of disease вЂў Abnormal body shape вЂ“ Bulging eyes. вЂ“ Growths around fins or mouth. вЂ“ Swollen bellies. http://www.americulture.com/ вЂў Change in behavior вЂ“ Healthy fish behave similarly from day to day. вЂ“ Producer must be familiar with normal behavior of fish. What are the types of fish diseases? вЂў Infectious disease вЂ“ Can be passed from one fish to another. вЂ“ Caused by germs or pathogens. вЂў Non-infectious diseases вЂ“ CanвЂ™t be spread from one fish another. вЂ“ Not caused by germs or pathogens. What are the types of fish diseases? вЂў Dead fish вЂ“ Immediately remove. вЂ“ Evaluate for signs of disease. www.sun.ac.za/kie/unistel/ aquaculture/ What are the types of fish infectious diseases? вЂў Bacterial disease вЂ“ Caused by bacteria. вЂ“ Usually internal. вЂ“ Lab test required to test for disease. вЂў Fungal disease вЂ“ Caused by tiny organisms called fungi. вЂ“ Grow on dead flesh. вЂ“ Could be a sign of another disease. What are the types of fish infectious diseases? вЂў Viral disease вЂ“ caused by a virus. вЂ“ often undetectable and difficult to treat. вЂў Parasitic disease вЂ“ Caused by parasites вЂў animals or plants that live in or on other animals (hosts). вЂ“ Harm hosts by chewing or sucking. вЂ“ If live in digestive system steals nutrients from host. What are the types of fish non-infectious diseases? вЂў Nutritional disease вЂ“ Inadequate diet вЂ“ Not enough food вЂ“ Improper nutrition вЂ“ Too much food can cause problems also вЂў Environmental disease вЂ“ Substances in the water вЂ“ Include heavy metals, gas or pesticides What are the types of fish non-infectious diseases? вЂў Chemical disease вЂ“ Level of a chemical in the water reaches point that injuries or death occurs. вЂ“ Come from pesticides or other pollutants. вЂў Physiological disease вЂ“ Abnormal functions in the organs of the fish. How can fish diseases be prevented and treated? вЂў Diseases among fish can be controlled in two different ways. 1. Prevention вЂў Keeping fish healthy and free of disease. 2. Treatment вЂў Using medication or other practices to help fish overcome diseases. How can fish diseases be prevented? вЂў Sanitation вЂ“ Keeping the water and facilities clean. вЂ“ Washing tanks. вЂ“ Ensuring people donвЂ™t introduce a disease. вЂў Quarantine вЂ“ Separating some fish from the others to prevent diseases. вЂ“ New fish are brought in to a facility it is common to quarantine them for a few weeks. How can fish diseases be treated? вЂў Dipping вЂ“ Immersing the fish for a few seconds in a concentrated solution designed to treat disease. вЂ“ Used when a few fish need to be dipped. вЂ“ Common dips include: вЂў Formalin вЂў salt How can fish diseases be treated? вЂў Feed Additives вЂ“ Medications mixed in with the feed. вЂў Bathing вЂ“ Similar to dipping. вЂ“ Except fish are placed in solution for a longer time. http://www.tilapiaseed.com/ How can fish diseases be treated? вЂў Injecting вЂ“ medications may be injected in to the fish using a needle and syringe. вЂў Indefinite treatment вЂ“ adding a low concentration of a chemical to the water over a long period of time. http://www.genomar.com/supreme.asp Review / Summary вЂў What are signs of diseases in fish? вЂў What are the types of fish diseases? вЂў How can fish diseases be prevented and treated?