< > Physical Factors / Environmental Components:
Substrate, Space, Physical Force & Predation

Individual Physical Factors directly causing disease

• Accommodation construction
• Acid / Alkali (Strong)
• Faecal / Urine contamination of substrate
• Fishing tackle
• Handling/Equipment
• Handling/Equipment (Eggs)
• Household rubbish
• Inter/intra specific interaction
• Non-specific physical trauma
• Pressure necrosis
• Restriction of normal movement
• Soil and mud