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|Title:||Profile of cortisol during the ontogeny of the Asian seabass, Lates calcarifer||Authors:||Sampath-Kumar, R.
|Issue Date:||1-May-1995||Citation:||Sampath-Kumar, R.,Byers, R.E.,Munro, A.D.,Lam, T.J. (1995-05-01). Profile of cortisol during the ontogeny of the Asian seabass, Lates calcarifer. Aquaculture 132 (3-4) : 349-359. ScholarBank@NUS Repository.||Abstract:||Whole-body cortisol was measured by radioimmunoassay from spawning for various periods up to 188 h post-spawning in 5 different broods. Fertilized eggs contained varying levels of cortisol (0.62-2.25 ng/g wet weight; designated "C0") that presumably originated from the mother. These levels declined as embryogenesis proceeded. The rate of decline (0.056 ± 0.004 ng/g/h) was fairly constant and was independent of C0. The decline continued up to about 4 h post-hatching (around 20 h post-spawning) when cortisol reached minimum levels. Soon after attaining the minimum, the levels started rising steadily to reach values as high as 6.10 ng/g by 180 h post-spawning. The rise is presumed to be a result of cortisol production by the larvae. The onset of this rise is much earlier than that reported in other species; it is also earlier than the first immunohistochemical evidence for the activity of the pituitary-interrenal axis, at around 40 h post-spawning. © 1995.||Source Title:||Aquaculture||URI:||http://scholarbank.nus.edu.sg/handle/10635/106874||ISSN:||00448486|
|Appears in Collections:||Staff Publications|
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