Silver Perch Welfare in Australian Pond Aquaculture

Silver perch is a native Australian freshwater species once important in aquaculture, with welfare considerations around oxygen management and handling stress.

Key Facts

Bidyanus bidyanus was a major species in early Australian inland aquaculture development
Production declined due to disease and competition from other species but still continues in NSW and Victoria
Silver perch are sensitive to dissolved oxygen depletion particularly in warm summer temperatures
They accept pelleted diets readily and grow well in pond systems
Native species farming can align with conservation goals when sourced from captive broodstock

Welfare Considerations

Silver perch welfare in pond aquaculture is primarily linked to water quality management. Oxygen depletion events during hot summer nights or following algal crashes cause acute physiological stress and mortality. Handling stress during grading and harvesting causes cortisol elevation and immune suppression requiring careful management. The species' potential for conservation benefit through captive breeding and stock enhancement adds an additional dimension to welfare considerations, as hatchery conditions affect the fitness and welfare of released fish.

What You Can Do

Monitor dissolved oxygen continuously in silver perch ponds during summer
Install emergency aeration backup for critical periods of oxygen risk
Handle silver perch during cooler periods and minimise air exposure during grading
Support native species aquaculture that maintains robust captive broodstock populations
Advocate for aquaculture welfare standards to apply to all Australian native species in culture