RATL: A Database of Reptile and Amphibian Toxicology Literature

Table 6 - pH Studies - 17
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
HYRE adult POPSUR Some population decline and no correlation
was found between pH and presence or
absence of species.
Bradford et al. 1994
HYRE embryo MORT 4.9-5.8 Al 75 µg/L 4.23 (TS),
Aluminum did not significantly affect post Bradford et al. 1994
(nomina 4.31(hatch
treatment survival but significantly reduced
l conc.) survival),
hatching time at all pH levels. Total length
4.32(post-
(TL) was unaffected. Critical pH: 4.25 (posttreatmenttreatment
survival), 4.75 (TL), 4.75 (hatch
survival)
time).
HYRE tadpoles MORT 4.9-5.8 Al 75 µg/L total
No significant effect. Critical pH: 4.25 Bradford et al. 1994
(nomina survival:
(post-treatment survival).
l conc.) 4.14
(SD=0.02)
hatch
survival:
4.26
(SD=0.09)
posttreatment
survival:
4.27
(SD=0.09)
HYVE embryo DEVOBS At pH 4.3, 50 % or more developed
normally.
Gosner and Black 1957 k
HYVE embryo HATSUC 3.5-6.3 20 3.5 Critical pH was 3.8. Hatching success varied
from 22.2% at pH 3.5 to 100% at pHs 4.0
and 5.0.
Grant and Licht 1993
HYVE tadpoles HATSUC 3.5-6.3 20 3.8-4.0 Critical pH was 3.5-3.8. pH had significant
effect on the mean total length of the
tadpoles. Mean total length of tadpoles at
pH 3.8 was not significantly different from
length at pH 4.0 (which was statistically the
same as length at higher pH).
Grant and Licht 1993
HYVE tadpoles BEHAV 5.3-6.6 HYVE abundance was affected by an
interaction between soil and acidification in
that treatment effects were only observed in
macrocosms with clay soils.
Sparling et al. 1995
LELA egg PHYSIO 10 Structure and molecular composition of
jellycoats were analyzed.
Carroll et al. 1991
LEMA adult MORT 4.6 - 7.0 8-10 None of the caged animals placed upstream
(pH 7.0) died; most of those placed
downstream (pH 4.6) died.
Huckabee et al. 1975 k