Improving the treatment of amoebic gill disease in salmonids with soft freshwater and the mucolytic drug L-cysteine ethyl ester ...

• Main Author: Roberts, Shane
• Format: Thesis
• Language: unknown
• Published: University Of Tasmania 2023
• Subjects: Atlantic salmon; Salmo salar
• Online Access: https://dx.doi.org/10.25959/23245724.v1; https://figshare.utas.edu.au/articles/thesis/Improving_the_treatment_of_amoebic_gill_disease_in_salmonids_with_soft_freshwater_and_the_mucolytic_drug_L-cysteine_ethyl_ester/23245724/1

Amoebic gill disease (AGD) is the single most significant disease affecting Tasmanian marine salmonid farming. The current treatment of AGD is freshwater bathing affected sea-caged fish. However, this current method of treatment is becoming less effective with an apparent increase in bathing frequency over the years fuelling a rise in production costs to the Tasmanian Atlantic salmon industry. The research reported in this thesis primarily aimed to identify an improved method of treatment that not only has an enhanced efficacy compared to the current treatment, but also exhibits minimal physiological consequences to treated fish. Initial experiments aimed at assessing the pathophysiological effects of AGD and freshwater bathing, with the intention for later comparison to improved and novel treatments. Freshwater· bathing elicited a minor ionoregulatory, and possibly acid base, dysfunction that was enhanced in AGD-affected Atlantic salmon (Salmo salar L.). Significant histochemical changes to gill mucous ...