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No acute toxicity to Uca pugnax, the mud fiddler crab, following a 96‐h exposure to sediment‐bound permethrin
10.1002/tox.20363.abs
In coastal areas, the application of pyrethroid insecticides and the resulting sediment residues pose a potential threat to marine benthic ecosystems. Pyrethroids cause acute toxicity and exhibit a wide range of sublethal effects on fish and crustaceans when exposure is aqueous. Fiddler crabs that inhabit salt marsh sediment are sensitive to sediment‐associated pollutants and serve as a sentinel species for xenobiotic exposure. We exposed adult U. pugnax to salt marsh sediment spiked with different 60% trans/40% cis permethrin concentrations for 96 h, and evaluated changes in oxygen consumption rate, hemolymph osmolarity, and glutathione S‐transferase activity (GST) following exposure. Marsh sediment was not lethal to U. pugnax at permethrin concentrations of 100–10,000 μg/kg. Sediment‐bound permethrin had no significant effect on respiration and osmoregulation. Exposure caused an induction of hepatopancreas GST in a dose‐dependent manner. Gill and midgut tissues showed induction at permethrin concentrations at 10,000 μg/kg. We conclude that short term exposure to permethrin‐contaminated sediment does not pose a significant threat to this species or impact respiration and osmoregulation. Furthermore, increased GST activity allows us to evaluate this enzyme's induction as a generalist biomarker for sediment‐bound pyrethroid exposures. © 2008 Wiley Periodicals, Inc. Environ Toxicol, 2008.
No acute toxicity to Uca pugnax, the mud fiddler crab, following a 96‐h exposure to sediment‐bound permethrin
10.1002/tox.20363.abs
In coastal areas, the application of pyrethroid insecticides and the resulting sediment residues pose a potential threat to marine benthic ecosystems. Pyrethroids cause acute toxicity and exhibit a wide range of sublethal effects on fish and crustaceans when exposure is aqueous. Fiddler crabs that inhabit salt marsh sediment are sensitive to sediment‐associated pollutants and serve as a sentinel species for xenobiotic exposure. We exposed adult U. pugnax to salt marsh sediment spiked with different 60% trans/40% cis permethrin concentrations for 96 h, and evaluated changes in oxygen consumption rate, hemolymph osmolarity, and glutathione S‐transferase activity (GST) following exposure. Marsh sediment was not lethal to U. pugnax at permethrin concentrations of 100–10,000 μg/kg. Sediment‐bound permethrin had no significant effect on respiration and osmoregulation. Exposure caused an induction of hepatopancreas GST in a dose‐dependent manner. Gill and midgut tissues showed induction at permethrin concentrations at 10,000 μg/kg. We conclude that short term exposure to permethrin‐contaminated sediment does not pose a significant threat to this species or impact respiration and osmoregulation. Furthermore, increased GST activity allows us to evaluate this enzyme's induction as a generalist biomarker for sediment‐bound pyrethroid exposures. © 2008 Wiley Periodicals, Inc. Environ Toxicol, 2008.
No acute toxicity to Uca pugnax, the mud fiddler crab, following a 96‐h exposure to sediment‐bound permethrin
Stueckle, Todd A. (author) / Griffin, Kristin (author) / Foran, Christy M. (author)
Environmental Toxicology ; 23 ; 530-538
2008-08-01
9 pages
Article (Journal)
Electronic Resource
English
Elsevier | 1991
Salinity effects on cadmium accumulation in various tissues of the tropical fiddler crab Uca rapax
| Online Contents | 1996