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ИзученИе элементного состава тканей И органов некоторых вИдов промысловых рыб бухты северная залИва петра велИкого (японское море) © 2016 г. н.И. стеблевская 1, 2 , с.в. чусовитина 2 , н.в. полякова 1 , е.а. Жадько 2

Изучено содержание микроэлементов в органах и тканях промысловых и культивируемых гидробионтов залива Петра Великого (Японское море). Определены особенности распределения и накопления микроэлементов органами и тканями гидробионтов. Показано влияние видовых различий и условий обитания на накопление и распределение нормируемых токсичных элементов (Pb, As, Cd и Hg) в тканях и органах моллюсков и рыб. Ключевые слова: микроэлементы; гидробионты; залив Петра Великого; рентгенофлуоресцентный метод.

The article touches upon the problem of sustainable development of the sea hydrobionts. Deep-sea scallop Mizuhopecten yessoensis is one of the most common breeding species in Primorsky Kray usually grown by two methods: cage and bottom. The cage (industrial) cul-tivation type is the most developed, but requires close attention. Improper planning of the mariculture development can affect the scallop survival, which in turn will lead to significant financial losses. Nowadays mariculture farms in different countries register the mass mortality of the cultivated aquatic organisms, the causes of this phenomenon being not clear, and often their identification requires a lot of time, as well as financial expenses. The use of prognostic mechanisms based on biomarkers can help identify the hidden threats in the body of cultivated scallops that lead to the mass mortality. The assessment of the state of mollusks at earlier stages of development will allow predicting and preventing significant losses of commercially valuable species. There have been analyzed the biomarker and scallop mortality rates of the scallop Mizuhopecten yessoensis cultivated by the cage method. Different groups of mollusks from 2 generations with the age difference of 10 years have been evaluated. In the course of the study it was found that with the increasing number of DNA defects and active accumulation of malondialdehyde in tissues the mortality of mollusks increases. It was stated that in scallops aged 1+ generations of 2015 there were registered the great number of DNA molecule defects and the high level of malondialdehyde concentration in the digestive gland and in the gills, which subsequently led to the mortality of almost all commercially valuable species aged 3+.

The contents of some elements in muscular and bone tissue, gills, reproductive gland, liver and skin of Arabesque greenling Pleurogrammus azonus and southern halibut flounder Hippoglossoides dubius caught in Amur Bay (Peter the Great Bay, Japan Sea) were studied. Characteristic features of this element distribution in organs and tissue are shown. Higher accumulation of some elements by bottom-dwelling species -southern halibut which consumes crustaceans, bivalves and polychaetes was found. The content of toxic elementslead, cadmium, arsenic and mercury in the organs and tissue of the studied species caught in Amur Bay does not exceed the maximum permissible concentration.