Safe Utilization of Prometryne in Sea Cucumber Culture Pond: From Nutrient Diffusion Flux Across Biodeposition-water Interface Aspect

doi:10.11924/j.issn.1000-6850.casb18060081

Abstract

Abstract: Sea cucumber is cultured generally in temperate zone. Macroalgae may outbreak in sea cucumber culture ponds, which influence its survival and growth. Macroalgae are killed by prometryne generally. It is supposed that prometryne might affect the nutrients regeneration in biodeposition because of herbicide toxicity. To evaluate the hypothesis, the sea cucumber feces were exposed to prometryne with different concentrations for 7 days and the nutrients diffusion fluxes across the biodeposition-water interface were studied. The results showed that the nutrients diffusion fluxes across the biodeposition-water interface and the construction of nutrients released from the biodeposition were not influenced by prometryne of normal dosage used to control macroalgae, hence, the prometryne could not affect the regeneration/accumulation of nutrients in biodeposition. It is no necessary to worry about the utilization of prometryne in sea cucumber culture ponds. Results of the present work may shed light on evaluating effects of herbicide on nutrients cycle in seawaters.

CLC Number:

P593

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