Comparison of aspects of the physiology and morphology of diploid and triploid Atlantic salmon Salmo salar ...

• Main Author: Sadler, J
• Format: Thesis
• Language: unknown
• Published: University Of Tasmania 2023
• Subjects: Atlantic salmon; Salmo salar
• Online Access: https://dx.doi.org/10.25959/23246003.v1; https://figshare.utas.edu.au/articles/thesis/Comparison_of_aspects_of_the_physiology_and_morphology_of_diploid_and_triploid_Atlantic_salmon_Salmo_salar/23246003/1

High mortality rates under suboptimal culture conditions and the incidence of lower jaw deformity (LJD) are problems associated with the commercial production of all female triploid Atlantic salmon (Salmo salar) within the Tasmanian Atlantic salmon industry. The current study investigates the primary and secondary haematological stress responses, the skeletal ontogeny and the incidence of skeletal deformity in fish from different population types (all-female diploids, all-female triploids, mixed sex diploids and mixed sex triploids), throughout development, up until 7 weeks post-sea water (SW) transfer. Plasma cortisol (F) levels of rested freshwater (FW) parr (n = 10) were less than `10` `ng.ml^-1` and were subsequently elevated in parr subject to 1 hour 20 minutes of confinement, regardless of sex or ploidy status. Rested all-female diploid SW smolt (n = 10) had significantly lower plasma F levels than rested all-female triploid, mixed sex diploid, and mixed sex triploid SW smolt. In all SW smolt, plasma F ...