The effect of L-tryptophan on aggressive interactions in barramundi (Lates calcarifer), and food intake of Atlantic salmon (Salmo salar) during seawater transfer ...

• Main Author: Hulse, TD
• Format: Thesis
• Language: unknown
• Published: University Of Tasmania 2023
• Subjects: Atlantic salmon; Salmo salar
• Online Access: https://dx.doi.org/10.25959/23239412.v1; https://figshare.utas.edu.au/articles/thesis/The_effect_of_L-tryptophan_on_aggressive_interactions_in_barramundi_Lates_calcarifer_and_food_intake_of_Atlantic_salmon_Salmo_salar_during_seawater_transfer/23239412/1

Aggressive behaviour between fish is common in both freshwater and seawater environments, at all stages of development and both between species and within species groups. In monoculture fish farms intracohort aggressive behaviours result in the establishment of dominance and feeding hierarchies, growth depensation (the increase in size variability within a population over time due to differences in growth rates), stress, injury, increased pathogen susceptibility and death. Given the material impact of aggressive behaviours on stock value, Australian fish farmers of both Atlantic salmon and barramundi, carry out specific husbandry practices and provide culture environments that aim to reduce these interactions. Tryptophan (TRP), an essential amino acid, is the precursor of serotonin (5-HT), a monoamine neurotransmitter implicated in mood modulation and behavioural change. This study examined whether supplementary dietary tryptophan (TRP) reduces the rate of aggressive interactions between barramundi. It also ...