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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 - 23<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 />

RACA tadpoles<br />

(stage 25-<br />

MORT 3.9-4.3 Near 0 % mortality at pH 4.3; 78%<br />

mortality at pH 4.2 <strong>and</strong> 100 % mortality at<br />

Gascon <strong>and</strong> Bider 1985<br />

30)<br />

pH 3.9.<br />

k<br />

RACL adult BEHAV 4-7 Results not extracted from paper. Vatnick et al. 1996<br />

RACL adult POPSUR 3.5-3.9 Both adults <strong>and</strong> larvae found in fields at pH<br />

3.5 - 3.9.<br />

Dale et al. 1985<br />

RACL adult POPSUR 4.44 - 6.63 Occurred in all ponds; densities increased in<br />

more acidic ponds; egg mass density was<br />

reduced as pH decreased.<br />

Clark 1986 k<br />

RACL adult POPSUR pH range= 4.53-6.97. Doka et al. 1997<br />

RACL all POPSUR 4.3-7.3 Al, Zn <strong>Amphibian</strong>s were present in all 118 potential Glooschenko et al. 1992<br />

breeding sites. The presence <strong>of</strong> RACL was<br />

positively related to buffering status<br />

(alkalinity, pH <strong>and</strong> other correlated<br />

variables).<br />

RACL embryo MORT 3.7-3.99 14.4-19 0 % mortality.<br />

Saber <strong>and</strong> Dunson 1978 k<br />

RACL embryo HATSUC 3.75-5.8 100 % hatching in s<strong>of</strong>t water at pH 4.25 <strong>and</strong><br />

Freda <strong>and</strong> Dunson 1986<br />

only 35 % in acidic bog water; 100 %<br />

hatching at pH 4.00 in s<strong>of</strong>t water <strong>and</strong> only<br />

10 % in acidic bog water.<br />

k<br />

RACL embryo HATSUC 4.4-7.85 21% decrease in hatching success at low pH.<br />

Lower temperatures <strong>and</strong> low pH also resulted<br />

in decreased length <strong>of</strong> frogs.<br />

Schalk et al. 1998<br />

RACL embryo DEVOBS At pH 4.1 50 % or more developed<br />

normally.<br />

Gosner <strong>and</strong> Black 1957 k<br />

RACL juvenile PHYSIO 4.0 Substantially increased transepithelial net ion<br />

McDonald et al. 1984<br />

loss <strong>and</strong> net acid uptake, <strong>and</strong> a slight<br />

inhibition <strong>of</strong> active ion transport.<br />

Disturbances disappeared by 7 h exposure in<br />

tadpoles by persisted in juveniles.<br />

k<br />

RACL larvae PHYSIO 2.5-4.0 Acute exposure depressed Na influx <strong>and</strong><br />

accelerated Na efflux. Increased external Ca<br />

slowed loss <strong>of</strong> Na. Initial body Na content<br />

was inversely correlated with acid tolerance.<br />

Freda <strong>and</strong> Dunson 1985 k<br />

RACL larvae<br />

(stage 25-<br />

MORT 3.3-6.0 5, 21 100 % survival after 14 d at 21°C for pH 3.5<br />

Dale et al. 1985<br />

- 6.0; 80 % survival at pH 5.0 after 38 d at<br />

29)<br />

5°C.<br />

k<br />

RACL tadpoles POPSUR Results not extracted from paper. Mallory et al. 1996

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