Effect on Hyalella azteca after pulse exposure to environmentally realistic concentrations of permethrin

Signe Pedersen, Annemette Palmqvist, Valery E. Forbes

Publikation: KonferencebidragKonferenceabstrakt til konferenceForskning

Resumé

Exposure of non-target aquatic organisms to pesticides is likely to occur in short pulses following periods of drain flow, surface run-off or spray drift. However, standard aquatic toxicity tests are primarily based on continuous and maintained exposure periods of 24 to 96 hours for acute effect assessment. There is therefore a mismatch between laboratory and field exposure patterns, which has implications for standard risk assessments and could result in over- or underestimation of toxicity. The aim of the present study was to examine the short-term and delayed effects of different environmentally realistic pulse exposure and concentration of a pyrethroid pesticide, permethrin, on the freshwater amphipod Hyalella azteca.
Permethrin is a pyrethroid insecticide used in mosquito control and to control a wide range of insect pests on various crops and is known to be highly toxic to aquatic invertebrates. H. azteca is widely distributed through North America where it is common as a food source for birds, fish and large invertebrates and is therefore considered as an ecologically important organism. In addition H. azteca has been extensively used as a test organism and is generally sensitive to contaminants. The toxicity of permethrin to H. azteca was first estimated in a 96 hour test with constant exposure. Then the toxicity and delayed effects after 10 days were tested with different concentrations and pulse lengths. The exposure pulses lasted for 1, 3 or 24 hours simulating a realistic run-off event. After exposure, the organisms were transferred to clean water and survival was recorded immediately after the pulse and again after 10 days from the start of the experiment.
OriginalsprogEngelsk
Publikationsdato2011
Antal sider1
StatusUdgivet - 2011
BegivenhedYoung Environmental Scientists Meeting (YES-Meeting) - RWTH Aachen University, Aachen, Tyskland
Varighed: 28 feb. 20112 mar. 2011
Konferencens nummer: 2
http://yes2011.sac-online.eu/

Konference

KonferenceYoung Environmental Scientists Meeting (YES-Meeting)
Nummer2
LokationRWTH Aachen University
LandTyskland
ByAachen
Periode28/02/201102/03/2011
Internetadresse

Citer dette

Pedersen, S., Palmqvist, A., & Forbes, V. E. (2011). Effect on Hyalella azteca after pulse exposure to environmentally realistic concentrations of permethrin. Abstract fra Young Environmental Scientists Meeting (YES-Meeting), Aachen, Tyskland.
Pedersen, Signe ; Palmqvist, Annemette ; Forbes, Valery E. / Effect on Hyalella azteca after pulse exposure to environmentally realistic concentrations of permethrin. Abstract fra Young Environmental Scientists Meeting (YES-Meeting), Aachen, Tyskland.1 s.
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title = "Effect on Hyalella azteca after pulse exposure to environmentally realistic concentrations of permethrin",
abstract = "Exposure of non-target aquatic organisms to pesticides is likely to occur in short pulses following periods of drain flow, surface run-off or spray drift. However, standard aquatic toxicity tests are primarily based on continuous and maintained exposure periods of 24 to 96 hours for acute effect assessment. There is therefore a mismatch between laboratory and field exposure patterns, which has implications for standard risk assessments and could result in over- or underestimation of toxicity. The aim of the present study was to examine the short-term and delayed effects of different environmentally realistic pulse exposure and concentration of a pyrethroid pesticide, permethrin, on the freshwater amphipod Hyalella azteca. Permethrin is a pyrethroid insecticide used in mosquito control and to control a wide range of insect pests on various crops and is known to be highly toxic to aquatic invertebrates. H. azteca is widely distributed through North America where it is common as a food source for birds, fish and large invertebrates and is therefore considered as an ecologically important organism. In addition H. azteca has been extensively used as a test organism and is generally sensitive to contaminants. The toxicity of permethrin to H. azteca was first estimated in a 96 hour test with constant exposure. Then the toxicity and delayed effects after 10 days were tested with different concentrations and pulse lengths. The exposure pulses lasted for 1, 3 or 24 hours simulating a realistic run-off event. After exposure, the organisms were transferred to clean water and survival was recorded immediately after the pulse and again after 10 days from the start of the experiment.",
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Pedersen, S, Palmqvist, A & Forbes, VE 2011, 'Effect on Hyalella azteca after pulse exposure to environmentally realistic concentrations of permethrin' Young Environmental Scientists Meeting (YES-Meeting), Aachen, Tyskland, 28/02/2011 - 02/03/2011, .

Effect on Hyalella azteca after pulse exposure to environmentally realistic concentrations of permethrin. / Pedersen, Signe; Palmqvist, Annemette; Forbes, Valery E.

2011. Abstract fra Young Environmental Scientists Meeting (YES-Meeting), Aachen, Tyskland.

Publikation: KonferencebidragKonferenceabstrakt til konferenceForskning

TY - ABST

T1 - Effect on Hyalella azteca after pulse exposure to environmentally realistic concentrations of permethrin

AU - Pedersen, Signe

AU - Palmqvist, Annemette

AU - Forbes, Valery E.

PY - 2011

Y1 - 2011

N2 - Exposure of non-target aquatic organisms to pesticides is likely to occur in short pulses following periods of drain flow, surface run-off or spray drift. However, standard aquatic toxicity tests are primarily based on continuous and maintained exposure periods of 24 to 96 hours for acute effect assessment. There is therefore a mismatch between laboratory and field exposure patterns, which has implications for standard risk assessments and could result in over- or underestimation of toxicity. The aim of the present study was to examine the short-term and delayed effects of different environmentally realistic pulse exposure and concentration of a pyrethroid pesticide, permethrin, on the freshwater amphipod Hyalella azteca. Permethrin is a pyrethroid insecticide used in mosquito control and to control a wide range of insect pests on various crops and is known to be highly toxic to aquatic invertebrates. H. azteca is widely distributed through North America where it is common as a food source for birds, fish and large invertebrates and is therefore considered as an ecologically important organism. In addition H. azteca has been extensively used as a test organism and is generally sensitive to contaminants. The toxicity of permethrin to H. azteca was first estimated in a 96 hour test with constant exposure. Then the toxicity and delayed effects after 10 days were tested with different concentrations and pulse lengths. The exposure pulses lasted for 1, 3 or 24 hours simulating a realistic run-off event. After exposure, the organisms were transferred to clean water and survival was recorded immediately after the pulse and again after 10 days from the start of the experiment.

AB - Exposure of non-target aquatic organisms to pesticides is likely to occur in short pulses following periods of drain flow, surface run-off or spray drift. However, standard aquatic toxicity tests are primarily based on continuous and maintained exposure periods of 24 to 96 hours for acute effect assessment. There is therefore a mismatch between laboratory and field exposure patterns, which has implications for standard risk assessments and could result in over- or underestimation of toxicity. The aim of the present study was to examine the short-term and delayed effects of different environmentally realistic pulse exposure and concentration of a pyrethroid pesticide, permethrin, on the freshwater amphipod Hyalella azteca. Permethrin is a pyrethroid insecticide used in mosquito control and to control a wide range of insect pests on various crops and is known to be highly toxic to aquatic invertebrates. H. azteca is widely distributed through North America where it is common as a food source for birds, fish and large invertebrates and is therefore considered as an ecologically important organism. In addition H. azteca has been extensively used as a test organism and is generally sensitive to contaminants. The toxicity of permethrin to H. azteca was first estimated in a 96 hour test with constant exposure. Then the toxicity and delayed effects after 10 days were tested with different concentrations and pulse lengths. The exposure pulses lasted for 1, 3 or 24 hours simulating a realistic run-off event. After exposure, the organisms were transferred to clean water and survival was recorded immediately after the pulse and again after 10 days from the start of the experiment.

M3 - Conference abstract for conference

ER -

Pedersen S, Palmqvist A, Forbes VE. Effect on Hyalella azteca after pulse exposure to environmentally realistic concentrations of permethrin. 2011. Abstract fra Young Environmental Scientists Meeting (YES-Meeting), Aachen, Tyskland.