7941

• UCREFRP Catalog Number: 7941
• Author: Johnson, W. W. and M. T. Finley
• Title: Editor
• USFW Year: Series
• USFW - Doc Type: 1980
• Copyright Material: NO

37
96-h LC50 96-h LC50
Test Stage or Temp 95% CI Test Stage or Temp 95% CI
organism wt (g) (C) (mg/L) organism wt (g) (C) (µg/L)

Channel catfishe 0.3 18 0.49 G. lacustris M 21 3.0
2.0-4.5
Bluegille 0.5 24 0.94
G. fasciatus M 21 4.3
G.fasciatus' M 21 313 3.5-5.2
Rainbow trout' 1.2 13 450 Orconectes IE 21 3.2b
1.6-7.5
Bluegill' 0.3 24 440
848-h LC50 Palaemonetes M 21 3.2b
. 1.8-5.8
NOTE: Toxicity of Aquathol K increased with in- Pteronarcella N 15 0.54
creases in test temperatures; the 96-h LC50 decreased 0.40-0.72
from 1,740 mg/L to 343 mg/L when the temperature
was increased from 7° to 22°C. However, no change in Pteronarcys YC2 15 0.25
toxicity was observed when pH varied between 6.5 and 0.20-0.31
9.5. Copper endothall was slightly more toxic to green
sunfish in soft water than in hard water; 96-h LC50's Claassenia YC2 15 0.08

were 1.3 and 4.3 mg/L, respectively. 0.06-0.09
Acroneuria YC2 15 >0.18
Hexagenia 11 15 62
41-95
ENDRIN Baetis J 15 0.90
0.57-1.4
Chemical Name: 1,2,3,4,10,10-hexachloro-6,7-epoxy-
1,4,4a,5,6,7,8,8a-octahydro-1,4-endo,endo-5,8- Ischnura J 21 2.4
dimethanonaphthalene 1.5-3.8
Alternate Names: CAS 72-20-8, Compound 269, ENT- 7tpula J 15 12
7.3-18
17251, Hexadrin, Mendrin
Atherix J 15 4.6
Principal Use: Insecticide 3.1-6.8
Sample Description: Technical material, 99% Rainbow trout 1.0 13 0.75
0.64-0.88
SUMMARY OF ACUTE TOXICITY
Goldfish F 12 0.441
96-h LC50 0.29-0.66
Test Stage or Temp 95% CI
organism wt (g) (C) (µg/L) Carp F 12 0.
0.25-0.41
Simocephalus I1 21 458
35-58 Fathead minnow 1.2 18 1.8
1.0-3.0
Daphnia magna 11 21 4.2a
Black bullhead 1.5 24 1.1
Daphnia pulex 11 15 208 1.0-1.3
13-30
Channel catfish 1.4 24 0.32
Cypridopsis M 21 1.88 0.29-0.35
Asellus M 15 1.5 Mosquitofish 0.6 17 1.1
0.9-3.7 0.4-3.4