Welfare considerations in sturgeon aquaculture, including the unique challenges of long-lived fish raised for caviar production.
Sturgeon aquaculture presents distinctive welfare challenges related to the biological characteristics of these ancient fish. As long-lived, slow-maturing species, sturgeon may spend many years in aquaculture facilities before reaching production size or reproductive maturity, making the welfare quality of their long-term environment critically important. Their sensitivity to water quality, particularly temperature, dissolved oxygen, and ammonia, means that production systems must maintain consistent, high-quality water conditions. The welfare significance of the long holding period before harvest distinguishes sturgeon from shorter-cycle species and argues for environmental enrichment and appropriate social housing over those extended periods. Progress toward live-harvest caviar extraction methods represents a meaningful welfare improvement over traditional killing, though questions about the stress of the harvest procedure itself remain relevant.