Pesticide Toxicities to Tadpoles of the Western Chorus Frog Pseudacris triseriata and Fowler's Toad Bufo woodhousii fowleri

Sanders, Herman O.

doi:10.2307/1441646

Cited by 60 publications

(32 citation statements)

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“…He also observed that older A. brevis tadpoles were more resistant than younger ones. These observations are similar to studies of other species (e.g., Cooke 1972a;Sanders 1970), and in the absence of more detailed work on Australian species, it should be assumed that the responses would at least be broadly similar.…”

Section: Other Pesticidessupporting

confidence: 83%

“…However, the highest levels are concentrated in the ovaries (Harri et al 1979). Although interspecific variation does occur (Weis 1975;Sanders 1970), generally similar reactions have been noted in other amphibians. Bufo bufo Linnaeus was observed to be the most resistant species to DDT of those Cooke (1972a) investigated.…”

Section: Toxic Effects Of Ddtmentioning

confidence: 53%

“…A survey of chemical residues in primary sewage sludge in the Sydney area had high levels of hexachlorobenzene, chlordane, dieldrin, heptachlor and aldrin (Mann and Ajani 1991). A survey of the toxicity effects (using TL50) of 18 pesticides, including dieldrin, heptachlor and aldrin (all commonly utilized in Australia) upon the tadpoles of Fowlers Toad Bufo woodhousii fowleri Girard, and 16 pesticides on Western Chorus Frog Pseudacris triseriata Weid-Neuwood juveniles, was undertaken by Sanders (1970). He observed that organochlorine compounds were less toxic than others, and that herbicides were generally less toxic than insecticides and systemic pesticides.…”

Section: Other Pesticidesmentioning

confidence: 99%

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Review of environmental factors influencing the decline of Australian frogs

Ferraro¹,

Burgin²

1993

Herpetology in Australia

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This paper reviews the factors involved in the decline, both inter-and intra-specific, of Australian frogs from both disturbed and apparently pristine habitats. Despite a lacl< of published accounts and an absence of long term population studies, a variety of causes were identified. Habitat changes, owing to human influences, are lowering frog numbers and species diversity. Other factors involved include heavy metals, pesticides, salinity, temperature, disease, competition from introduced species and human collection. The complex interactions and synergistic effects of these factors on frogs have yet to be fully elucidated. However, since frogs are sensitive to environmental influences at all stages of their life cycle, population studies would provide base line data to identify, at an early stage, the impact of human influence.

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Section: Other Pesticidessupporting

confidence: 83%

Section: Toxic Effects Of Ddtmentioning

confidence: 53%

Section: Other Pesticidesmentioning

confidence: 99%

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Review of environmental factors influencing the decline of Australian frogs

Ferraro¹,

Burgin²

1993

Herpetology in Australia

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“…Tadpoles can bioaccumulate many aquatic contaminants, which can result in decreased survivorship, predator avoidance, and likelihood of metamorphosis, leaving the animals more susceptible to pond-drying [6][7][8][11][12][13]. Due to their sensitivity to changes in the environment and their obligate aquatic lifestyle, the amphibian tadpole has been a useful model for toxicity testing [2,5,8].…”

Section: Introductionmentioning

confidence: 99%

Effects of environmentally relevant concentrations of endosulfan, azinphosmethyl, and diazinon on Great Basin spadefoot (Spea intermontana) and Pacific treefrog (Pseudacris regilla)

Westman

Elliott

Cheng

et al. 2010

Enviro Toxic and Chemistry

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We conducted dose-response exposures to compare the lethality of endosulfan, diazinon, and azinphosmethyl in the early-life stages of the Great Basin spadefoot (Spea intermontana) and the Pacific treefrog (Pseudacris regilla). Our experiment occurred in two 8-d phases: one, with developing embryos, and two, with Gosner Stage 27 tadpoles. Pesticide concentrations were representative of field-measured concentrations (60 ng/L of endosulfan, 50 ng/L of azinphosmethyl, and 350 ng/L of diazinon), in the same geographic areas where these species occur in British Columbia. Although the concentrations met the requirements for federal water quality guidelines, we observed mortalities, deformities, and other sublethal effects. Phase 1 consisted of exposing Gosner Stage 10 embryos in the pesticide solutions for a total of 8 d. Significant mortality of S. intermontana began posthatch in the highest lethal concentrations of the commercial formulations of endosulfan (Thiodan; LC20(8d)=2,672.7 ng/L) and diazinon (LC20(8d)>175,000 ng/L). Phase 2 compared behavior, morphology, and survival of captive-reared tadpoles exposed to the same 8-d experimental regime as the embryo experiment. Endosulfan induced significant effects on behavior and morphology of P. regilla and significantly reduced survivorship of S. intermontana (LC20(8d)=77.1 ng/L). Abnormal behavior and excitability was observed in both species, with P. regilla tadpoles being more sensitive. At 60,000 ng/L endosulfan, P. regilla also lost pigmentation and exhibited abnormal tail morphology.

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“…Space use and temporal activity : Spencer 1964;Whitaker 1971;Kramer 1973Kramer , 1974Miller 1977;Campbell and Clark 1981. Effects of habitat modification and management: Gosner and Black 1957;Hess 1969;Sanders 1970;Wassersug and Siebert 1975;Porter and Hakanson 1976;Barclay 1980.…”

mentioning

confidence: 99%