RATL: A Database of Reptile and Amphibian Toxicology Literature

Table 6 - pH Studies - 31
Species
Code b
Lifestage Study
Endpoint g
pH Level(s)
Temp h Additional
Contam a
Cont.
Conc.
Conc.
e
Units
e
LC50 LC100 e
Effects eg
Reference k
RASY larvae POPSUR 4.5-5.5 15-20 Fe 250-350 µg/L Interactive effects of pH and metals on a
freshwater, palustrine wetland assemblage
were measured in 500L outdoor mesocosms.
Horne and Dunson 1995
RASY larvae POPSUR 4.5-5.5 15-20 Pb 2-5 µg/L Interactive effects of pH and metals on a
freshwater, palustrine wetland assemblage
were measured in 500L outdoor mesocosms.
Horne and Dunson 1995
RASY larvae POPSUR 4.5-5.5 15-20 Zn 25-41 µg/L Interactive effects of pH and metals on a
freshwater, palustrine wetland assemblage
were measured in 500L outdoor mesocosms.
Horne and Dunson 1995
RASY larvae (25-
27)
MORT 15 Tadpoles produced by adult from acidic
ponds were more acid tolerant.
Pierce and Harvey 1987 k
RASY tadpoles MORT 4.14-5.75 Al 0-200 Results not extracted from paper.
Clark and LaZerte 1985 k
RASY tadpoles POPSUR Results not extracted from paper. Mallory et al. 1996
RASY tadpoles DEVOBS 4.2 96 h exposure to bog water (pH 4.2): (i) for
Porter Ridge, artificial soft water hatched
tadpoles there was 31.7% survival; (ii) for
Porter Ridge, bog hatched tadpoles there was
83.3% survival; for Avery Carlos marsh,
artificial soft water hatched tadpoles there
was 5.0% survival.
Karns 1992
RASY tadpoles BEHAV 3.75, 4.0, 4.5 20-22 3.71 (96
Along with RACL, they were the least Freda and Taylor 1992
h);
sensitive species and did not avoid pH 4.0.
N=30/treat
They did avoid pH 3.75. A significant
-ment
correlation was found between the 96 h
LC50 for pH and the % reduction in use of
the two octants acidified to pH 4.0.
RASY tadpoles MORT 5.4, 4.5, 4.1 As a result of increased mortality among
AMJE over 7 d, 38% more RASY survived at
pH 4.1 than at pH 5.4.
Sadinski and Dunson 1989
RASY tadpoles DEVOBS 4.5 and 5.5 ambient Cu 0.015 mg/L Copper was extremely toxic to both species Horne and Dunson 1995
outdoor
during both acute and chronic exposures.
Acute exposure RASY survival was
significantly greater in the low pH (88 vs
52%) and the high hardness treatments (90
vs 50%).
RASY tadpoles HATSUC 3.5-6.3 20 3.5 Critical pH was 3.5-3.8 for tadpoles; survival Grant and Licht 1993
at pH 3.8 did not differ from that at pH 3.5
or 4.0 but it was significantly lower than at
pH 4.0.