RATL: A Database of Reptile and Amphibian Toxicology Literature

Table 6 - pH Studies - 20
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
PSCR all POPSUR 4.3-7.3 Al, Zn Amphibians were present in all 118 potential Glooschenko et al. 1992
breeding sites. The presence of HYCR was
positively related to buffering status
(alkalinity, pH and other correlated
variables).
PSCR embryo DEVOBS 3.8 Results not extracted from paper.
Gosner and Black 1957 k
PSCR embryo HATSUC 4.1-4.3 15 100% mortality at early development for
embryos treated with acidic bog water.
71.5% successful hatch, 0.3% curl occurred
for embryos treated with control artificial
soft water (pH 7.5).
Karns 1992
PSCR embryo BEHAV < 3.8-5.0 Abundance marginally correlated with pH,
low pH may decrease hatching success.
Glooschenko et al. 1986
PSCR embryo HATSUC 4.2 bog, 7.5 fen No eggs developed or hatched at pH 4.2;
71.5 % hatched at pH 7.5.
Karns 1984 k
PSCR embryo
(mid
blastula)
HATSUC 4.5-6.0 21 Al Results not extracted from paper.
Dale et al. 1985 k
PSCR embryo
(mid-
REPRO 3.0-8.0 20 0 % hatch at pH 3.0; 80-83 % hatched at pH
Dale et al. 1985
6.0 - 8.0; 54 % hatched at pH 4.0, all
blastula)
hatched larvae were deformed and all died.
k
PSCR tadpoles POPSUR Results not extracted from paper. Mallory et al. 1996
PSCR tadpoles MORT 4.2 6.7% survival at pH 4.2 (bog water), 100%
survival at pH 7.5 (artificial soft water).
Karns 1992
PSCR tadpoles BEHAV 4.0, 4.5 20-22 3.74 (96
Activity declined significantly at both pH Freda and Taylor 1992
h);
levels during the experimental period in the
N=30/treat
fluvarium. Tadpoles avoided pH level 4.0. A
-ment
significant correlation was found between the
96 h LC50 for pH and the % reduction in use
of the two octants acidified.
PSCR tadpoles (4
wk)
MORT 4, 5, 7 96 h survival was over 90 % at pH 7.0 and
approx. 70% at pH 5.0. No tadpoles
survived 24 h at pH 4.0.
Correll et al. 1987 k
PSNI embryo DEVOBS 3.8 Results not extracted from paper.
Gosner and Black 1957 k
PSSC adult PHYSIO 7.0 pyruvate 0.03-0.50
mM
Less LDH activity in brain and heart than in
either NRHE or ELOB snakes; snakes had
lower Km values.
PSTR adult POPSUR No evidence that amphibian embryos are
present during snow melt and episodic
acidification; population decline not likely
due to acidification.
Baeyens and Hurley 1986
Vertucci and Corn 1996