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  • Title: [Hormonal indices of the normal dolphin Turpsiops truncatus and in the dynamics of experimental stress].
    Author: Orlov MM, Mukhlia AM, Kulikov NA.
    Journal: Zh Evol Biokhim Fiziol; 1988; 24(4):557-63. PubMed ID: 3061252.
    Abstract:
    Radioimmune assay has been made of the content of cortisol, insulin, triiodothyronine (T3) and thyroxine (T4) in the blood serum of the dolphin under normal conditions and during 3- ad 6-hour stress. Normal levels of these hormones were found to be equal to 90.34 +/- 6.86 nmol/l, for cortisol, 64.1 +/- 11.1 pmol/l for insulin, 1.27 +/- 0.04 nmol/l for T3 and 138.3 +/- 8.9 nmol/l for T4. Seasonal changes in cortisol level were observed, hormonal concentration being significantly higher during winter and spring as compared to that during summer and autumn. On the whole, the dynamics of hormonal shifts during stress reaction in the dolphin is similar to that in the terrestrial animals reflecting the development of general adaptive syndrome.
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