Abstract:
:Fertilized eggs of zebrafish were exposed under flow-through conditions to several concentrations of the following pesticides: lindane 40, 80, 110, 130, and 150 micrograms/liter; atrazine 300, 1300, and 9100 micrograms/liter; deltamethrin 0.5, 0.8, and 1.2 micrograms/liter. Hatching, abnormalities in development (external deformations, edema, etc.), and mortality were recorded over a period of 35 days. At the end of the experiment, the body lengths of the fish were measured. Survival of juvenile fish after 35 days was reduced by increasing concentrations of all xenobiotics tested: lindane enhanced the mortality from 110 micrograms/liter and atrazine from 1300 micrograms/liter, and deltamethrin showed an effect even at the lowest test concentration (0.5 micrograms/liter). Other parameters were affected differently: hatching rate was reduced only by deltamethrin (from 0.8 micrograms/liter): lindane caused a decrease in growth (40 micrograms/liter) but had no effect on the other parameters. Atrazine increased the number of deformations and edema (1300 micrograms/liter) but did not influence hatching rate and growth. The sensitivity of the early life stages to the pesticides was compared with acute toxicity data (LC50) of adult zebrafish. The early life stages were less sensitive to lindane (118 versus 75 micrograms/liter), whereas in the case of atrazine (1300 versus 37,000 micrograms/liter) and deltamethrin (0.5 versus 2 micrograms/liter; 0.5 micrograms/liter was the lowest concentration tested) larvae were more sensitive.
journal_name
Ecotoxicol Environ Safjournal_title
Ecotoxicology and environmental safetyauthors
Görge G,Nagel Rdoi
10.1016/0147-6513(90)90004-osubject
Has Abstractpub_date
1990-12-01 00:00:00pages
246-55issue
3eissn
0147-6513issn
1090-2414pii
0147-6513(90)90004-Ojournal_volume
20pub_type
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