Petriv V. Metabolic and productive action of iodine in pond fish

The object of the investigation is a hormonal and metabolic profile of blood of pond fish under the influence of increased concentration of iodine in water and diet. The subject of the investigation is the content of thyroid hormones and metabolic profile of blood of two-year-old carp with increasing iodine intake with food and of two-year old carp, white silver carp and grass carp grown in the water with high iodine concentration, their growth and iodine content in skeletal muscle. The methods of the investigation are biochemical (spectrophotometric, Radioimmunoassay, chromatographic), fish-breeding (ichthyological, hydrochemical), and statistic. The novelty of the research: The content of thyroid hormones has been defined for the first time and the metabolic profile of blood of two-year old carp with high content of iodine in the diet has been studied. The content of thyroid hormones in the blood has been investigated and thus the intensity of growth and iodine content in skeletal muscle of two-year old carp, white silver carp, and grass carp grown in ponds with higher concentration of iodine in water has been studied. The increase of thyroxine level and the absence of significant changes in triiodothyronine content in the blood of two-year old carp and herbivorous fish under the increase of iodine intake have been found. The result of the research: The way of enhancing the growth intensity of carp and herbivorous fish (white silver carp and white grass carp) and iodine content in the meat received, based on the increase of iodine concentration in water as a result of adding KI and KIO3, has been experimentally grounded. The guidelines on increasing the growth intensity and nutritional value of meat of carp by adding iodine to the diet have been published and the patent of Ukraine for utility model "The way of enhancing the iodine content in the muscles of herbivorous fish" has been obtained.