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RATL: A Database of Reptile and Amphibian Toxicology Literature

RATL: A Database of Reptile and Amphibian Toxicology Literature

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Table 6 - pH Studies - 35<br />

Species<br />

Code b<br />

Lifestage Study<br />

Endpoint g<br />

pH Level(s)<br />

Temp h Additional<br />

Contam a<br />

Cont.<br />

Conc.<br />

Conc.<br />

e<br />

Units<br />

e<br />

LC50 LC100 e<br />

Effects eg<br />

Reference k<br />

RATE embryo DEVOBS 4.5, 6.0 Al 0-1600 µg/L pH in the absence <strong>of</strong> Al had no effect on<br />

survival to tadpoles stage. Increasing Al<br />

conc. reduced the survival <strong>of</strong> lowl<strong>and</strong><br />

embryos in circumneutral water, but did not<br />

effect upl<strong>and</strong> embryos.<br />

Tyler-Jones et al. 1989<br />

RATE embryo MORT 3.8, 4.0, 4.25, 7±1 Ca 0.5, 1.0, mg/L pH rose then remained close to initial levels. Cummins 1988<br />

4.5<br />

2.0 <strong>and</strong><br />

There was no significant relation between<br />

4.0<br />

calcium conc. <strong>and</strong> the amount pH increased.<br />

RATE embryo DEVOBS 3.92-4.84 Al When limestone was added to ponds 1 <strong>and</strong> 2, Beattie <strong>and</strong> Tyler-Jones<br />

fertilization success increased from approx<br />

87% to 100%. The mean percentage<br />

survival <strong>of</strong> embryos increased significantly<br />

from 22% to 93% <strong>and</strong> from 0% to 69.3%,<br />

respectively.<br />

1992<br />

RATE embryo- MORT 5.0 14.5 Al 0-1.6 mg/L Elevated Al conc. increased the rate <strong>of</strong> Olsson et al. 1987<br />

tadpoles<br />

morphological defects in larvae. Spinal<br />

curvatures <strong>and</strong> vesicles on head <strong>and</strong> thorax<br />

were observed. Vesicles ruptured <strong>and</strong> caused<br />

ulceration at later stages.<br />

RATE embryo- MORT 4.0 14.5 No altered hatching frequency could be found Olsson et al. 1987<br />

tadpoles<br />

for any stage <strong>of</strong> development due to a 24 h<br />

reduction <strong>of</strong> pH to 4.0. All samples from a<br />

certain egg mass showed similar hatching<br />

success independent <strong>of</strong> the stage at which<br />

they were acid shocked.<br />

RATE embryo- HATSUC 4.5 18.0 Significantly lower hatching frequency for Olsson et al. 1987<br />

tadpoles<br />

embryos incubated on sphagnum (35.2%<br />

survival) in comparison to controls (67.6%<br />

survival). A rise in pH occurred in control<br />

aquaria (from 4.5 to 4.97); this did not<br />

happen in the sphagnum treated aquaria.<br />

RATE larvae MORT 3.92-7.39 Embryonic survival in the two acidic ponds<br />

increased from 0 % <strong>and</strong> 22 % to 69% <strong>and</strong> 93<br />

% respectively following liming. A year after<br />

liming, embryonic survival in one pond had<br />

decreased significantly from 93 % to 79 %.<br />

Beattie et al. 1993<br />

RATE larvae DEVOBS 4.0-6.0 Al 100-800 Low pH exerted a strong harmful effect <strong>and</strong><br />

high levels <strong>of</strong> Al almost completely<br />

precluded successful reproduction.<br />

Andren <strong>and</strong> Nilson 1988<br />

RATE not<br />

specified<br />

POPSUR 4.0-8.0 Survey <strong>of</strong> amphibian breeding sites.<br />

Beebee 1983 k

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