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Contemporary Problems of Ecology

2022 year, number 6

Assessment of toxicity of bottom sediments from coastal areas of Peter the Great Gulf (Sea of Japan)

1A. V. Zhirmunsky National Scientific Center of Marine Biology of FEB RAS, Vladivostok, Russia
2Far Eastern Federal University, Vladivostok, Russia
Keywords: bottom sediments, pollution, bioassay, sea urchin embryos and larvae, Peter the Great Gulf


Toxicity of bottom sediments from some areas of the Peter the Great Gulf has been studied using bioassay with embryos and larvae of the sand dollar Scaphechinus mirabilis (Agassiz, 1864). Based on the calculation of the integral toxicity index (ITI), different inhibition rates of early larval development are identified in elutriate from the bottom sediments. The effects are the most negative in the coastal zone of the Vladivostok in Gornostay Bay (Ussuriysky Bay) and in the Kozmina Bay (the Nakhodka Bay). Larvae in elutriate from the were characterized by significant anomalies, and the ITI was maximal (ITI = 10). A high percentage of abnormally developed larvae was detected in a sample from Podyapolsky Bay (ITI = 6.08). The results of the study confirm the decrease in the anthropogenic press on the Peter the Great Gulf, except for of local areas adjacent to sea ports and a reclaimed solid domestic waste landfill.