2021
DOI: 10.1590/1519-6984.236427
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Abstract: This study was aimed at determining the concentration of pyrethroid in the surface water, sediment, Weyonia acuminata and Synodontis clarias fish in Lekki lagoon, Lagos, Nigeria. In-situ physicochemical analysis of the surface water was conducted using a calibrated handheld multi-parameter probe (Horiba Checker Model U-10). Intestinal samples from infected and uninfected fish were analyzed for pyrethroid concentrations, microbial colonization, proteins (PRO), superoxide dismutase (SOD), catalase (CAT), reduced… Show more

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(2 citation statements)
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“…Cypermethrin and pyrethrin residues in whole-body fingerling fish exposed in laboratory trials were greater than 50 μg/g when they were sampled 15 min after being placed in recovery baths; however, cypermethrin concentrations in fillets and skin of ready-toeat Channel Catfish decreased to below 50 μg/g within 4 h (fillets) or 24 h (skin) after fish were placed into recovery baths. The depuration rate of cypermethrin is likely to differ among fish species and age-classes and is worthy of further study; however, because fish can depurate pyrethroids in clean water (Morolli et al 2006;Akinsanya et al 2021), cypermethrin concentrations in fingerling-sized fish are likely to decrease to nondetectable levels before they are of a size to be harvested by anglers. Government resource managers may want to prevent the harvest of ready-to-eat fish by fishers for at least 24 h but up to 7 d to allow for the depuration of cypermethrin by fish exposed to chemical control at fish hatcheries.…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…Cypermethrin and pyrethrin residues in whole-body fingerling fish exposed in laboratory trials were greater than 50 μg/g when they were sampled 15 min after being placed in recovery baths; however, cypermethrin concentrations in fillets and skin of ready-toeat Channel Catfish decreased to below 50 μg/g within 4 h (fillets) or 24 h (skin) after fish were placed into recovery baths. The depuration rate of cypermethrin is likely to differ among fish species and age-classes and is worthy of further study; however, because fish can depurate pyrethroids in clean water (Morolli et al 2006;Akinsanya et al 2021), cypermethrin concentrations in fingerling-sized fish are likely to decrease to nondetectable levels before they are of a size to be harvested by anglers. Government resource managers may want to prevent the harvest of ready-to-eat fish by fishers for at least 24 h but up to 7 d to allow for the depuration of cypermethrin by fish exposed to chemical control at fish hatcheries.…”
Section: Discussionmentioning
confidence: 99%
“…2006; Akinsanya et al. 2021), cypermethrin concentrations in fingerling‐sized fish are likely to decrease to nondetectable levels before they are of a size to be harvested by anglers. Government resource managers may want to prevent the harvest of ready‐to‐eat fish by fishers for at least 24 h but up to 7 d to allow for the depuration of cypermethrin by fish exposed to chemical control at fish hatcheries.…”
Section: Discussionmentioning
confidence: 99%