کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9454775 | 1308556 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of dehydroabietic acid and abietic acid on survival, reproduction, and growth of the crustacean Daphnia magna
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effects of dehydroabietic acid and abietic acid on survival, reproduction, and growth of the crustacean Daphnia magna Effects of dehydroabietic acid and abietic acid on survival, reproduction, and growth of the crustacean Daphnia magna](/preview/png/9454775.png)
چکیده انگلیسی
Resin acids, a class of wood extractives, are potential toxic constituents in many pulp and paper mill effluents. In the present investigation, the effects of two predominant resin acids, dehydroabietic acid (DHA) and abietic acid (ABA), on survival, reproduction, and growth of the freshwater crustacean Daphnia magna were assessed over its life cycle. Based on the experimentally determined acute toxicity data (48-h EC50's) for DHA (7.48Â mg/L) and ABA (7.98Â mg/L), D. magna was treated chronically with each resin acid at nominal concentrations of 0, 0.25, 0.5, 1.0, 2.0, 4.0, and 8.0Â mg/L for 21 days. Both DHA and ABA at concentrations as high as 4.0Â mg/L did not affect physiological and reproductive parameters such as time to maturation, number of molting, number of broods, and number of offspring produced from surviving daphnids, while significant mortality was observed only at 8.0Â mg/L in both cases. However, a small but statistically significant decrease in Daphnia growth (body length) at the end of exposure was detected at concentrations as low as 0.5Â mg/L for DHA and 1.0Â mg/L for ABA, respectively. These results indicated that both DHA and ABA had the potential to exhibit weak growth inhibition without apparent negative effects on reproduction to D. magna at nonlethal concentration levels. This slight effect is not expected to be ecologically significant because the concentrations of DHA and ABA in biologically treated pulp and paper mill effluents are well below the effective levels observed in the present study.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ecotoxicology and Environmental Safety - Volume 61, Issue 1, May 2005, Pages 83-88
Journal: Ecotoxicology and Environmental Safety - Volume 61, Issue 1, May 2005, Pages 83-88
نویسندگان
Yasushi Kamaya, Naohiro Tokita, Kyoji Suzuki,