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Carbaryl, Carbofuran, and Methomyl - National Marine Fisheries ...

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Table 65. Study designs <strong>and</strong> results with freshwater aquatic invertebrates<br />

Chemical Taxa/species<br />

Assessment<br />

measures<br />

Concentrations tested<br />

multiple n= 25;<br />

species richness, 510 μg/L; single<br />

including predators, herbivores, biomass,<br />

application; simulating<br />

zooplankton<br />

abundance, survival direct overspray<br />

<strong>Carbaryl</strong><br />

<strong>Carbaryl</strong><br />

<strong>Carbaryl</strong><br />

<strong>Carbaryl</strong><br />

C. californica (stonefly)<br />

C. sp. (mayfly)<br />

A. sp (mayfly)<br />

B. americanus (caddisfly)<br />

P. sp. (caddisfly) early instar<br />

P. sp. (caddisfly) late instar<br />

L. unicolor (caddisfly)<br />

Coleopteran (beetles), Diptera<br />

(flies), Trichoptera (caddisflies),<br />

terrestrial insects,<br />

Emphemeroptera (mayflies)<br />

Survival; LC1,LC50<br />

salmonid stomach<br />

contents<br />

Chironomus riparius (midge) Survival (EC50);<br />

Uptake rate;<br />

Bioconcentration<br />

factors (BCFs)<br />

1-30 μg/L<br />

4-100,000 μg/L<br />

10-28 μg/L<br />

5-55 μg/L<br />

5-80 μg/L<br />

5-80 μg/L<br />

5- 80 μg/L<br />

0.5 lbs/acre, 2<br />

applications, 7 days<br />

interval<br />

Multiple concentration<br />

ranges at pH 4,6,8;<br />

temps 12, 20, 30 ◦ C<br />

351<br />

Exposure<br />

Effects<br />

duration<br />

13 d Reduced richness of<br />

community (by 15%),<br />

predators, zoo plankton;<br />

reduced biomass of predators;<br />

increased abundance of large<br />

herbivores;<br />

No effect on zooplankton<br />

abundance;<br />

elimination of diving beetle<br />

larvae, Daphnia pulex, D.<br />

ambigua<br />

96 h<br />

9.0 (LC1); 17.3 (LC50) μg/L<br />

3.0; 11.1<br />

7.5; 20.4<br />

28.8; 41.2<br />

14.8; 30.3<br />

33.8; 61.0<br />

9.5; 29.0<br />

na Increased numbers of Diptera<br />

in stomach after first spray;<br />

increased numbers of<br />

Emphemeroptera, Trichoptera,<br />

Diptera, <strong>and</strong> terrestrial insects<br />

indicating drift; condition factor<br />

of fish increased following<br />

applications due to increased<br />

feeding; fish AChE inhibited<br />

15-34%fish AChE inhibited 15-<br />

34%<br />

24 h EC50s (61-133 μg/L);<br />

Lowest EC50 at 30 ◦ C, pH 4<br />

<strong>and</strong> 6; Highest EC50s at 10 ◦ C,<br />

pH 4 <strong>and</strong> 6.<br />

Uptake rates increased with<br />

temp.<br />

BCFs = 5.36-10.12<br />

Data source<br />

(Relyea<br />

2005)<br />

(Peterson,<br />

Jepson et al.<br />

2001)<br />

(Haines<br />

1981)<br />

(Lohner <strong>and</strong><br />

Fisher 1990)

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