Title: Identify common health problems of fish.
Course: Aquaculture Infusion Units (AIU) > Section: Maintaining a Healthy Stock in an Aquaculture System

Identification should include types of fish disease and common stressors of fish that contribute to infectious and non-infectious diseases. They are

- stressors
  - chemical (e.g., poor water, pollution, diet, and metabolic waste)
  - biological (e.g., density, microorganisms, macroorganisms)
  - physical (e.g., temperature, light, sounds , and gases)
  - procedural (e.g., handling, shipping, and treatments)

- infectious diseases
  - bacterial
    - clinical signs
      - behavioral (e.g., lack of appetite, lethargy)
      - physical (e.g., lesions, discoloration, hemorrhaging)

    - contributing factors
    - prevention

  - viral
    - clinical signs (e.g., behavioral, physical)
    - contributing factors
    - prevention

  - parasitic
    - clinical signs (e.g., behavioral, physical)
    - contributing factors
    - prevention

  - fungal
    - clinical signs (e.g., behavioral, physical)
    - contributing factors
    - prevention

- non-infectious diseases
  - clinical signs (e.g., behavioral, physical)
  - contributing factors (e.g., water quality issues)
  - prevention.

Process/Skill Questions:

- What are some behavioral signs of a fish in distress?
- If a fish has lesions, what is the likely culprit?
- What are some examples of unusual fish behavior that may indicate disease?
- What are three management practices that prevent stress?