Summary
This controlled feeding trial investigated whether supplementing juvenile striped catfish diets with different oil sources could improve growth and omega-3 fatty acid deposition, a known nutritional deficiency in this species relative to marine fish. Linseed oil supplementation (4% dietary inclusion) significantly increased whole-body omega-3 levels (7.86%), total n-3 fatty acids (9.12%), and growth performance compared to salmon oil, soybean oil, rapeseed oil, or a no-oil control. The findings suggest linseed oil as a practical plant-based dietary intervention to enhance the nutritional profile and consumer appeal of farmed striped catfish.
Regional applicability
This research was conducted in Vietnam, the primary global producer of striped catfish for aquaculture. Findings are directly applicable to Asian aquaculture systems where this species is commercially dominant. Transferability to United Kingdom contexts is limited, as striped catfish is not a significant farmed species in the UK; however, the methodology and results may inform oil supplementation strategies in other freshwater aquaculture species raised in temperate regions.
Key measures
Whole-body omega-3 fatty acid content (%), alpha-linoleic acid (ALA, 18:3n3) content, total n-3 PUFA deposition, growth performance metrics
Outcomes reported
The study compared growth performance, body composition, and fatty acid profiles in striped catfish juveniles fed diets supplemented with salmon oil, soybean oil, linseed oil, or rapeseed oil over 60 days. Key measures included whole-body omega-3 content, alpha-linoleic acid (ALA, 18:3n3), total n-3 fatty acids, and growth metrics.
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