Growth evaluation of Oreochromis niloticus (Cichlidae, Neopterygii) exposed to Trichlorfon

Guimarães, Ana Tereza Bittencourt; Calil, Patrícia

doi:10.1590/s1516-89132008000200012

Cited by 9 publications

(2 citation statements)

References 25 publications

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“…For instance, five applications of 0.25 ppm TCF in water weekly are recommended to treat parasites. However, TCF is repeatedly and indiscriminately used to treat parasites at high concentrations by fish farmers without specialized technical orientation in Brazil, leading to residue contamination of the water environment . It has been reported that different species of aquatic organisms have various sensitivities to TCF exposure.…”

Section: Introductionmentioning

confidence: 98%

“…However, TCF is repeatedly and indiscriminately used to treat parasites at high concentrations by fish farmers without specialized technical orientation in Brazil, leading to residue contamination of the water environment. 6 It has been reported that different species of aquatic organisms have various sensitivities to TCF exposure. The toxicity of TCF to the crustacean Daphnia magna and the early stages and adults of Danio rerio was 0.29 μg L −1 (LC50 48 h ), 25.4 mg L −1 and 28.8 mg L −1 (LC50 96 h ), respectively.…”

Section: Introductionmentioning

confidence: 99%

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Toxicity, Biodegradation, and Metabolic Fate of Organophosphorus Pesticide Trichlorfon on the Freshwater Algae Chlamydomonas reinhardtii

Wan

Ding

et al. 2020

J. Agric. Food Chem.

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This study investigated the toxicity of trichlorfon (TCF) to the freshwater algae Chlamydomonas reinhardtii, as well as its biodegradation and metabolic fate. The growth of C. reinhardtii decreased with increasing TCF concentration, and the maximum inhibition ratio was 51.3% at 200 mg L–1 TCF compared to the control. Analyses of pigment content, chlorophyll fluorescence, and antioxidant enzymes indicated that C. reinhardtii can produce resistance and acclimatize to the presence of TCF. The variations in pH during cultivation suggested that photosynthetic microalgae have innate advantages over bacteria and fungi in remediating TCF. A 100% biodegradation rate was achieved at a maximum concentration of 100 mg L–1 TCF. Ten metabolites were identified by GC–MS, and the degradation pathways of TCF by the algae were proposed. This research demonstrated that C. reinhardtii is highly tolerant to and can efficiently degrade TCF. Thus, C. reinhardtii can be used to remove traces of TCF from natural water environments and to treat TCF-contaminated wastewater.

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%