FEFU scientists sounded the concentration of pesticides in mussels and fish

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A scientist of the Far Eastern Federal University shared the results of many years of research on the content of organochlorine pesticides (OCPs) in mussel tissues living in the Far Eastern seas, the press service of the university reports. The study was published in the scientific journal Water Research.

The author of the study, Vasily Tsygankov, head of the laboratory of ecobiotechnologies at the FEFU Biomedicine School of FEFU, notes that from the mid-20s to the 2000s, the concentration of OCPs in mussels in the Russian Far East, which were widely used in agriculture from the mid-20s century, grew 10 or more times. Pesticides have penetrated into the ecosystems of the Sea of ​​Japan, the Sea of ​​Okhotsk and the Bering Sea.

Photo: Press Service of the Far Eastern Federal University
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At the same time, according to the ecotoxicologist, according to new, not yet published experimental results, at present, the concentration of OCPs in Far Eastern mussels has decreased almost three times. Similar results of fluctuations in the performance of pesticides were also detected in the tissues of other marine inhabitants: mollusks, fish, seabirds, and mammals. In the fatty tissues of the latter, toxicants are particularly concentrated. Pesticides enter marine organisms from coastal waters where their concentration can be very high.

As Tsygankov emphasizes, HOPs in the environment are dangerous for all living things that are at the top of the food chain – not only for animals, but also for people.

"The reason is that the biomagnification process is in effect: pesticides in higher concentrations accumulate in representatives of higher trophic levels as a result of feeding on organisms of lower trophic levels that contain a low amount of toxicants. This can lead to poisoning and even death. It has been established that the OCPs suppress the endocrine and immune systems of marine animals, lead to various abnormalities and genetic changes in the population, provoke the occurrence of tumors. us to ensure that we all think about the new standards for monitoring pesticides in the environment, and in particular in the Far East of Russia, "- he said.

The research results will form the basis for conclusions – in which direction the situation with pesticides is changing. At the same time, it is possible that in different regions of the picture will also be different.

By the way

In 2018, FEFU scientists studying sea birds and mammals of the Sea of ​​Okhotsk and the Bering Sea came to the conclusion that pesticides accumulate more actively in organisms with a high content of adipose tissue. Also, more of them are accumulated by species that live longer and stand higher in the food chain. For example, there are few pesticides in small fish organisms, and seabirds, mammals, and predators that feed on this fish have a high concentration of COPD.

The degree of OCP accumulation in marine organisms is an important indicator of the ecological state of the planet. This indicator is taken into account when monitoring the state of the environment.

. (tagsToTranslate) Society (t) Science (t) Branches WG (t) Far East (t) DFO (t) Primorsky Krai (t) Zen

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