Abstract
The presence of a complex of biologically active steroid compounds (BASC) – hydrocortisone, corticosterone, progesterone, testosterone and estrogens (vertebrate hormones) in invertebrate hydrobionts of different phylogenetic levels was revealed in the experiments. The features of the quantitative content of BASC in different organs/tissues of hydrobionts and their changes at different stages of development are shown. The level of BASC in organisms or their organs is largely due to their own steroidogenesis, but at the same time, organisms can accumulate exogenous steroid compounds. The adaptive role of ALS in some invertebrates in changing conditions of the aquatic environment has been found. The similarity of the concentration of steroid compounds in different groups of bionts leads to the idea of a certain “physiological constant” of this complex of compounds in all organisms.
Published Version
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