Studies on lysine utilisation and dietary lysine requirement with Atlantic salmon (Salmo salar L.) parr ...

• Main Author: Hauler, Rhys
• Format: Thesis
• Language: unknown
• Published: University Of Tasmania 2023
• Subjects: Atlantic salmon; Salmo salar
• Online Access: https://dx.doi.org/10.25959/23229038; https://figshare.utas.edu.au/articles/thesis/Studies_on_lysine_utilisation_and_dietary_lysine_requirement_with_Atlantic_salmon_Salmo_salar_L_parr/23229038

For Atlantic salmon, estimates of the efficiency of lysine utilisation for growth (liveweight, protein and lysine gain) and obligatory loss (maintenance) are currently unavailable. The primary aim of this thesis was to examine efficiency of lysine utilisation in Atlantic salmon parr under various nutritional constraints. Where possible, results were discussed in a comparative perspective to identify the similarities between fish and terrestrial animals. Lysine utilisation by parr was used to evaluate a factorial approach to determine the lysine requirement (allowance), which remains relative unexplored in fish nutrition. When Atlantic salmon parr were fed lysine intakes that limited growth response (marginal lysine intakes) the efficiency of lysine utilisation for lysine gain was 0.71. A similar efficiency was confirmed for marginal lysine intakes in published lysine requirement studies for Atlantic salmon. Based on these observations, reevaluation of published dietary lysine requirements of fish identified ...