Brook Char Welfare in North American Aquaculture

Key Facts

• Brook char require 10-16C water for optimal welfare and are sensitive to temperatures above 20C
• They are territorial and show aggression at high stocking densities, requiring management intervention
• Water above 20C causes chronic thermal stress and immune suppression in production systems
• Pre-slaughter percussive stunning is standard practice in established North American operations
• RAS technology allows precise temperature management in areas with warm surface water

Welfare Considerations

Brook char welfare in aquaculture reflects their cold clear-stream biology. Temperature management is the primary welfare priority — even brief excursions above 20C cause immune suppression and mortality in high-density production. Their territorial nature creates aggression challenges at commercial stocking densities. RAS technology addresses temperature and density challenges simultaneously by providing controlled conditions year-round.

What You Can Do

• Source brook char from RAS operations with documented temperature management and oxygen monitoring
• Advocate for thermal welfare standards in brook char aquaculture certification schemes
• Support development of species-specific welfare standards for cold-water salmonids in North America
• Choose certified brook char from operations with pre-slaughter stunning requirements
• Support research into optimal social group sizes and enrichment for brook char welfare in captivity