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Acute toxicity, behavioral changes, and histopathological effects of deltamethrin on tissues (gills, liver, brain, spleen, kidney, muscle, skin) of Nile tilapia (Oreochromis niloticus L.) fingerlings by M. Zıynet Yildirim; A. Çağlan Karasu Benlı; Mahmut Selvı; Ayhan Özkul; Fıgen Erkoç; Oner Koçak is a Environmental Science article available to read on EtoBox.

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## Abstract Deltamethrin, a synthetic pyrethroid contaminating aquatic ecosystems as a potential toxic pollutant, was investigated in the present study for acute toxicity. The purpose of this study was to evaluate LC~50~ values of deltamethrin on Nile tilapia (__Oreochromis niloticus__ L.) fingerlings and investigate histopathological responses of fish exposed to deltamethrin. The 48 h LC~50~ value for Nile tilapia fingerlings was estimated as 4.85 μg/L using static test system. In addition, behavioral changes at each deltamethrin concentration were observed closely. All fish, exposed to 5 μg/L deltamethrin revealed severe morphological alterations in the gills and liver. In the gills hyperemia, fusion of secondary lamellae and telangiectasis were observed; whereas hydropic degenerations in liver were observed in all examined fish. The results are significant for reporting acute deltamethrin toxicity in terms of behavioral and histopathological changes: Deltamethrin is highly toxic to fingerlings. © 2006 Wiley Periodicals, Inc. Environ Toxicol 21: 614–620, 2006.

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Author

M. Zıynet Yildirim; A. Çağlan Karasu Benlı; Mahmut Selvı; Ayhan Özkul; Fıgen Erkoç; Oner Koçak

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 1520-4081)

Published

2006

Language

EN

Field

Environmental Science (Physical Sciences)