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Updated: May 26, 2026
07:29
A Standardized Protocol for Preference Testing to Assess Fish Welfare
Published on: February 22, 2020
Dietary nitrogen and fish welfare
Luis E C Conceição1, Cláudia Aragão, Jorge Dias
1CCMAR-CIMAR L.A., Centro de Ciências do Mar do Algarve, Universidade do Algarve, Campus de Gambelas, 8005-139, Faro, Portugal, lconcei@ualg.pt.
Fish Physiology and Biochemistry
|January 4, 2012
Summary
Optimizing fish diets with specific amino acids (AA) can improve welfare under stress. Proper nitrogen formulations help fish cope with stressful periods, enhancing their immune system and behavior.
Area of Science:
- Aquaculture Nutrition
- Fish Physiology
- Animal Welfare Science
Background:
- Limited research exists on optimizing dietary nitrogen for fish welfare.
- Stress significantly impacts fish amino acid (AA) metabolism and nutrient requirements.
- Sub-optimal diets can exacerbate welfare issues in farmed fish.
Purpose of the Study:
- To review how stress affects fish AA metabolism.
- To explore the impact of suboptimal dietary nitrogen on fish welfare.
- To evaluate strategies for improving dietary nitrogen formulations to mitigate stress in fish.
Main Methods:
- Literature review of metabolomic and genomic studies.
- Analysis of the effects of specific amino acid supplementation.
- Evaluation of plant-protein ingredients and bioactive peptides.
Main Results:
- Stress increases the requirement for indispensable amino acids (AA).
- Supplementation with arginine, leucine, lysine, methionine, threonine, and glutamine can enhance immunity.
- Tryptophan influences behavior and feed intake; bioactive peptides improve immunocompetence.
Conclusions:
- Dietary nitrogen optimization is crucial for fish welfare under stress.
- Improved formulations can help fish manage stressful periods.
- Addressing antinutritional factors in plant-based diets is essential for maximizing nutritional value.
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