Factors affecting fish physiology

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Lethal factors 

• PH
• Temperature
• Dissolve gases
• Salinity

Controlling factors

•  Oxygen
• Carbon dioxygen

Limiting factors

• PH
• Temperature
• Salinity
• Oxygen

Masking factors

• Turbidity
• Ammonia
• Plankton

Directive factors

•  Nutrient
• Mineral