Published 08.04.2026
New research highlights the impact of slaughter methods on fish welfare
A recent scientific study published in Aquaculture examines how different slaughter and transport methods affect fish welfare and product quality in Atlantic salmon. The findings provide valuable insights for an industry facing increasing transport distances and evolving production structures.
Key findings
The study compares slaughter at sea using stun-and-bleed vessels with traditional well-boat transport followed by land-based slaughter.
Key results include:
- Improved welfare indicators when slaughtering at sea
- Lower physiological stress levels
- Slower rigor mortis development
- Comparable product quality during chilled storage
Why this matters
As aquaculture operations scale up and processing becomes more centralized, fish are often exposed to longer transport times and additional handling before slaughter.
This phase has a direct impact on both fish welfare and final product quality.
Reducing stress and improving handling conditions is becoming increasingly important for predictable, high-quality outcomes.
Optimar perspective
At Optimar, we develop solutions designed to improve fish handling throughout the entire value chain.
Efficient and welfare-oriented stun-and-bleed processes contribute to reduced stress levels and more controlled processing conditions.
This research highlights the importance of focusing on fish welfare as a key factor in modern seafood production.
Read the full study
👉 Slaughtering Atlantic salmon using stun-and-bleed vessels or well-boats and their subsequent effects on welfare and quality
Chan et al., 2026 – Aquaculture
👉 https://www.sciencedirect.com/science/article/pii/S0044848626003431
This page summarizes independent scientific research. All findings and conclusions belong to the original authors.
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