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Assessing the Effect of Modified Clay on the Toxicity of Karenia mikimotoi Using Marine Medaka (Oryzias melastigma) as a Model Organism.


ABSTRACT: Blooms of the toxic dinoflagellate Karenia mikimotoi could threaten the survival of marine life, and modified clay (MC) is considered a promising method for the control of harmful algal blooms. Here, using marine medaka as the model organism, the toxicity of K. mikimotoi before and after MC disposal was investigated. The results showed that only a certain density of intact K. mikimotoi cells could cause obvious damage to fish gills and lead to rapid death. A systematic analysis of morphology, physiology, and molecular biology parameters revealed that the fish gills exhibited structural damage, oxidative damage, osmotic regulation impairment, immune response activation, and signal transduction enhancement. MC can flocculate K. mikimotoi rapidly in water and reduce its toxicity by reducing the density of intact algae cells and hemolytic toxicity. The results indicate that MC is an effective and safe method for controlling K. mikimotoi blooms.

SUBMITTER: Zhang P 

PROVIDER: S-EPMC8949556 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature

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Assessing the Effect of Modified Clay on the Toxicity of <i>Karenia mikimotoi</i> Using Marine Medaka (<i>Oryzias melastigma</i>) as a Model Organism.

Zhang Peipei P   Song Xiuxian X   Zhang Yue Y   Zhu Jianan J   Shen Huihui H   Yu Zhiming Z  

Toxics 20220223 3


Blooms of the toxic dinoflagellate <i>Karenia mikimotoi</i> could threaten the survival of marine life, and modified clay (MC) is considered a promising method for the control of harmful algal blooms. Here, using marine medaka as the model organism, the toxicity of <i>K. mikimotoi</i> before and after MC disposal was investigated. The results showed that only a certain density of intact <i>K. mikimotoi</i> cells could cause obvious damage to fish gills and lead to rapid death. A systematic analy  ...[more]

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