Arsenic species and uptake in amphibians (Rana clamitans and Bufo americanus)

2013 ◽  
Vol 15 (8) ◽  
pp. 1520 ◽  
Author(s):  
Maeve M. Moriarty ◽  
Iris Koch ◽  
Kenneth J. Reimer
Keyword(s):  
Arsenic Species ◽  
Rana Clamitans ◽  
Bufo Americanus

Development and transmission of Gyrinicola batrachiensis (Walton, 1929) Adamson, 1981 (Pharyngodonidae: Oxyuroidea)

1981 ◽  
Vol 59 (7) ◽  
pp. 1351-1367 ◽  
Author(s):  
Martin L. Adamson
Keyword(s):  
Rana Pipiens ◽  
Early Stage ◽  
Tap Water ◽  
Pond Water ◽  
Rana Clamitans ◽  
Adult Males ◽  
Bufo Americanus ◽  
Individual Female ◽  
Adult Females ◽  
Water Pond

Individual female Gyrinicola batrachiensis from tadpoles produce thin-shelled larvated eggs and thick-shelled eggs containing embryos in an early stage of cleavage. Larvae in thin-shelled eggs hatched soon after deposition and survived for less than 1 h in aged tap water, pond water, or diluted buffer. Results presented herein show that thin-shelled eggs are autoinfective whereas thick-shelled eggs are transmission agents. Thick-shelled eggs isolated from natural infections in Rana clamitans, Rana pipiens, and Bufo americanus were infective to tadpoles of R. clamitans, R. sylvatica, Pseudacris triseriata, and B. americanus but not to transformed anurans. All worms recovered from tadpoles experimentally infected with eggs from natural infections in B. americanus were females and only 15% of worms examined from tadpoles experimentally infected with eggs from natural infections in R. clamitans were males. Development of G. batrachiensis was studied in experimentally infected R. clamitans held at 20 and 25 °C. Development was more rapid at 25 °C and males developed more rapidly than females at both temperatures. Adult males were first observed after 9 days (25 °C) and 16 days (20 °C) and adult females were first observed after 12 days (25 °C) and 19 days (20 °C).

Acidity and associated water chemistry of amphibian habitats in Nova Scotia

1985 ◽  
Vol 63 (1) ◽  
pp. 97-105 ◽  
Author(s):  
J. M. Dale ◽  
B. Freedman ◽  
J. Kerekes
Keyword(s):  
Nova Scotia ◽  
Rana Catesbeiana ◽  
Function Analysis ◽  
Acid Tolerance ◽  
Rana Sylvatica ◽  
Rana Clamitans ◽  
Bufo Americanus ◽  
Amphibian Species ◽  
Species Groups ◽  
Field Transplant

One hundred and fifty-nine field sites consisting of ditches, bogs, marshes, ponds, and lakes in south and central Nova Scotia were surveyed for the presence of the adults, eggs, or larvae of 11 amphibian species. Water samples were analyzed for pH, alkalinity, color, conductivity, Na, K, Mg, Ca, SO4, and Cl. Discriminant function analysis revealed that none of these variables predicted a species' presence. Two three-species groups were found to be significantly associated among themselves, but mutually exclusive of each other. The two groups were (i) Ambystoma maculatum, Hyla crucifer, and Rana sylvatica and (ii) Rana clamitans, Rana catesbeiana, and Rana palustris. Rana sylvatica and A. maculatum were observed breeding successfully in an acidic bog (mean pH 4.1). Rana clamitans adults and larvae were located in the field at pHs as low as 3.5 and 3.9, respectively. Field transplant studies, using eggs of A. maculatum and R. sylvatica (at pH 5.7 and 4.1) and Bufo americanus (at pH 6.3 and 4.1), revealed that R. sylvatica was least sensitive to acidity. There is considerable variation in acid tolerance among the various species of Nova Scotia amphibians. Nevertheless, successful breeding by some species is occurring at very low pHs.

Seasonal changes in populations of Gyrinicola batrachiensis (Walton, 1929) in wild tadpoles

1981 ◽  
Vol 59 (7) ◽  
pp. 1377-1386 ◽  
Author(s):  
Martin L. Adamson
Keyword(s):  
Seasonal Changes ◽  
Sharp Increase ◽  
Rana Clamitans ◽  
Bufo Americanus ◽  
Individual Female ◽  
Single Generation ◽  
Late Fall ◽  
Permanent Pond ◽  
Young Of The Year ◽  
Almost All

Five hundred and thirty-five tadpoles of Rana clamitans, collected from a permanent pond throughout spring, summer and fall, 1976 to 1978, and 85 tadpoles of Bufo americanus, collected from a seasonal marsh in summer, 1978 were examined for the presence of Gyrinicola batrachiensis. Rana clamitans laid eggs in June or July, passed one winter in the tadpole stage, and metamorphosed the following June or July. Gyrinicola batrachiensis occurred only in tadpoles and was lost from metamorphosing tadpoles prior to the eruption of the forelimbs. Individual female worms produce thick-shelled eggs involved in transmission as well as thin-shelled, autoinfective eggs. The number of each egg type in female worms collected from August 1977 to June 1978 was determined. Young-of-the-year tadpoles apparently were infected by ingesting thick-shelled eggs. In late fall almost all tadpoles contained adult worms and thin-shelled eggs predominated in female worms at this time. There was no transmission or autoinfection in winter; female worms which had wintered in tadpoles deposited autoinfective thin-shelled eggs in April resulting in a sharp increase in intensity. Females of the autoinfective generation matured in May and June, and contained almost exclusively thick-shelled eggs. Thus, young-of-the-year tadpoles enter an environment recently contaminated with thick-shelled eggs of G. batrachiensis. Bufo americanus hatches and metamorphoses in a single season. In this host, G. batrachiensis underwent a single generation. Males were not found and females contained only thick-shelled eggs. The absence of autoinfective eggs in worms from this host is understandable because of the brief period toads spent as tadpoles.

Associations between blood arsenic and urinary arsenic species concentrations as an exposure characterization tool

2021 ◽  
Vol 750 ◽  
pp. 141517
Author(s):  
Yuko Takayama ◽  
Yuko Masuzaki ◽  
Futoshi Mizutani ◽  
Toyoto Iwata ◽  
Eri Maeda ◽  
...  
Keyword(s):  
Arsenic Species ◽  
Urinary Arsenic ◽  
Urinary Arsenic Species

scholarly journals Associations between Arsenic Species in Exfoliated Urothelial Cells and Prevalence of Diabetes among Residents of Chihuahua, Mexico

2014 ◽  
Vol 122 (10) ◽  
pp. 1088-1094 ◽  
Author(s):  
Jenna M. Currier ◽  
María C. Ishida ◽  
Carmen González-Horta ◽  
Blanca Sánchez-Ramírez ◽  
Lourdes Ballinas-Casarrubias ◽  
...  
Keyword(s):  
Arsenic Species ◽  
Urothelial Cells

scholarly journals Effect of Milling and Parboiling Processes on Arsenic Species Distribution in Rice Grains

Rice Science ◽  
2021 ◽  
Vol 28 (4) ◽  
pp. 402-408
Author(s):  
Maria Chiara Fontanella ◽  
Maria Martin ◽  
Daniele Tenni ◽  
Gian Maria Beone ◽  
Marco Romani
Keyword(s):  
Species Distribution ◽  
Arsenic Species ◽  
Rice Grains

Filter design for arsenic species in aqueous environments: An ab initio optimization of the absorbing capacity of magnetite-based arsenic filters

2021 ◽  
Vol 295 ◽  
pp. 129794
Author(s):  
Victor Pilicita ◽  
Galo J. Páez Fajardo ◽  
Rosa Ormaza ◽  
Louis F.J. Piper ◽  
Jorge Silva-Yumi
Keyword(s):  
Ab Initio ◽  
Filter Design ◽  
Arsenic Species ◽  
Aqueous Environments
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