Regular ArticleEffects of Growth Hormone and Insulin-like Growth Factor I on Salinity Tolerance and Gill Na+, K+-ATPase in Atlantic Salmon (Salmo salar): Interaction with Cortisol
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Dietary effects on biomarkers of growth, stress, and welfare of diploid and triploid Atlantic salmon (Salmo salar) during parr-smolt transformation
2022, Aquaculture ReportsCitation Excerpt :This result appears to confirm that both diploid and triploid salmon successfully underwent parr-smolt transformation, and that elevated levels of gene expression encoding for the hormones is a pre-adaption to prepare the fish for life in seawater. In anadromous fish, cortisol plays a role in salinity adaptation, by influencing the number and size of gill chloride cells and stimulating the activity and expression of their ion transporters, i.e. Na+, K+-ATPases (McCormick, 2001; Zadunaisky, 1996), and it acts in synergy with the GH/IGF system to increase salinity tolerance and seawater adaptation (McCormick, 1996). In our study, muscle cortisol levels changed significantly over time, with higher concentrations being recorded in November and December than in October (Fig. 5b), thereby reflecting and confirming its role in the parr-smolt transformation and pre-adaptation for life in seawater (Chalmers et al., 2018).
Regulation of thyroid hormones and branchial iodothyronine deiodinases during freshwater acclimation in tilapia
2021, Molecular and Cellular EndocrinologyTesting of NKA expression by mobile real time PCR is an efficient indicator of smoltification status of farmed Atlantic salmon
2021, AquacultureCitation Excerpt :McCormick and Saunders (1987) suggested that the transport protein Sodium Potassium ATPase (NKA) is responsible for salt regulation and seawater acclimation in salmon. NKA concentration has been shown to consistently increase in the gills during smolt SW acclimation (Prunet et al., 1989; McCormick, 1995, 1996, 2001; 2000; Bystriansky and Schulte, 2011; Handeland et al., 2013) and acts in conjunction with the Na(+)/K(+)/2Cl(−) cotransporter (NKCC), which assists in salt secretion through gill chloride cells (Pelis et al., 2001), and the cystic fibrosis transmembrane regulator (CFTR) which is an apical Cl- channel functioning under favourable electrical gradients (Marshall and Singer, 2002). NKA is composed of two major subunits alpha and beta, each having several isoforms.
Effects of long-term cortisol treatment on growth and osmoregulation of Atlantic salmon and brook trout
2021, General and Comparative Endocrinology