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، جلد ۱۰، شماره ۵، صفحات ۳۹-۴۳
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| عنوان فارسی |
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| چکیده فارسی مقاله |
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| کلیدواژه‌های فارسی مقاله |
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| عنوان انگلیسی |
Acute Toxicity of a Heavy Metal Cadmium to an Anuran, the Indian Skipper Frog Rana cyanophlyctis |
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| چکیده انگلیسی مقاله |
Background: There has been increasing awareness throughout the world regarding the remarkable decrease in amphibian population. For such amphibian population decline several causes have been given. Cadmium, a heavy metal is released both from natural sources (leaching of cadmium rich soils) and anthropogenic activities to the aquatic and terrestrial environments. This study evaluated the toxicity of heavy metal cadmium to Indian skipper frog Rana cyanophlyctis. Methods: For the determination of LC50 values for cadmium, four-day static renewal acute toxicity test was used. Five replicates each containing ten frogs were subjected to each concentration of cadmium chloride (15, 20, 25, 30, 35, 40, 45 and 50 mg/L). At different exposure periods (24, 48, 72 and 96 h), the mortality of the frog was subjected to Probit analysis with the POLO-PC software (LeOra Software) to calculate the LC50 and 95% confidence level. Results: The LC50 values of cadmium chloride for the frog R. cyanophlyctis at 24, 48, 72, and 96 h are 32.586, 29.994, 27.219 and 23.048 mg/L, respectively. The results have been discussed with the toxicity reported for other aquatic vertebrate --fish. Conclusion: Cadmium caused mortality to the frog and this could be one of the reasons for population decline of frogs which inhabit water contaminated with heavy metals. |
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| کلیدواژه‌های انگلیسی مقاله |
Amphibia, Cadmium, Heavy Metal, LC50, Toxicity. |
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| نویسندگان مقاله |
| Ajai Kumar Srivastav
Department of Zoology, DDU Gorakhpur University, Gorakhpur 273 009, India.
| Shilpi Srivastav
Department of Zoology, DDU Gorakhpur University, Gorakhpur 273 009, India.
| Nobuo Suzuki
Kanazawa University, Ogi, Noto-cho, Ishikawa 927-0553, Japan
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| نشانی اینترنتی |
http://ijt.arakmu.ac.ir/browse.php?a_code=A-10-74-3&slc_lang=en&sid=1 |
| فایل مقاله |
اشکال در دسترسی به فایل - ./files/site1/rds_journals/2737/article-2737-2049624.pdf |
| کد مقاله (doi) |
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| زبان مقاله منتشر شده |
en |
| موضوعات مقاله منتشر شده |
عمومی |
| نوع مقاله منتشر شده |
پژوهشی |
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