Abstract:
:The acute and chronic toxicities of lindane to larvae of the freshwater insects Chironomus riparius Meigen, Chaoborus flavicans (Meigen), and Sigara striata (L.) were investigated in mesocosm compartments of an experimental pond. The following median lethal concentrations (LC50s) were determined: 240-hr LC50 of 2.0 micrograms lindane liter-1 for second instar C. riparius, 72-hr LC50 of 6.5 micrograms lindane liter-1 for fourth instar C. riparius, and 96-hr LC50s of 4.0 and 3.9 micrograms lindane liter-1 for fourth instar C. flavicans and fourth or fifth instar S. striata, respectively. Lindane significantly reduced the growth over 10 days of second instar C. riparius compared to that of the control at the treatment concentrations where larvae survived (1.0, 2.5, and 7.0 micrograms lindane liter-1). A significant increase in the median emergence time in comparison to that of the control was observed for C. riparius exposed to 0.8 and 2.0 micrograms lindane liter-1, with higher concentrations causing 100% mortality. The findings compare well with previously reported laboratory data on the toxicity of lindane to insects and support the methodology and results of a laboratory growth test for C. riparius.
journal_name
Ecotoxicol Environ Safjournal_title
Ecotoxicology and environmental safetyauthors
Maund SJ,Peither A,Taylor EJ,Jüttner I,Beyerle-Pfnür R,Lay JP,Pascoe Ddoi
10.1016/0147-6513(92)90023-vkeywords:
subject
Has Abstractpub_date
1992-02-01 00:00:00pages
76-88issue
1eissn
0147-6513issn
1090-2414pii
0147-6513(92)90023-Vjournal_volume
23pub_type
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