UDC (546.39:597):591.526

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IMPACT OF MINERAL NITROGEN COMBINATION ON VIABILITY OF CARP (CYPRINIDAE) FISHES ON DIFFERENT STAGES OF ONTOGENESIS

О. Potrohov, This email address is being protected from spambots. You need JavaScript enabled to view it. , Institute of hydrobiology of Ukrainian National Academy of Sciences, Kуiv
O. Zinkovskiy, This email address is being protected from spambots. You need JavaScript enabled to view it. , Institute of hydrobiology of Ukrainian National Academy of Sciences, Kуiv
Yu. Hudiyash, Institute of hydrobiology of Ukrainian National Academy of Sciences, Kуiv

Character of influence of mineral nitrogen compounds on survival of embryos, larvae and uneven-age groups of a carp (Cyprinus carpio) and a grass carp (Ctenopharyngodon idella) is investigated. It is marked, that the basic negative effect has ammonium in its molecular and ionic form, nitrites evince considerably smaller toxicity and are hemotoxic poison, and nitrates do not influence on fishes. It fixed, that on a measure of passing of an ontogenesis tolerance of fishes to action of ammonium nitrogen strengthens. Change of norms of reactions to action of toxic factors of environment essentially depends on a degree of development of organs and systems of respiration, a circulation of the blood and an excretion. An apparent role plays gradual and long adaptation of fishes to influence of toxins.

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