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بررسی تجمع زیستی و دفع فلز مس از بافتهای سیاه ماهی (Capoeta fusca) قناتهای شرق ایران | ||
| تحقیقات دامپزشکی و فرآوردههای بیولوژیک | ||
| شناسنامه علمی شماره، دوره 25، شماره 4، دی 1391، صفحه 29-37 اصل مقاله (686.35 K) | ||
| شناسه دیجیتال (DOI): 10.22092/vj.2012.101047 | ||
| نویسندگان | ||
| علیرضا پورخباز* 1؛ زهرا محسنی2 | ||
| 1عضو هیات علمی گروه محیط زیست دانشگاه بیرجند | ||
| 2دانشجوی کارشناسی ارشد گروه محیط زیست دانشگاه بیرجند | ||
| چکیده | ||
| آلودگی اکوسیستم های آبی با فلزات سنگین توجه جهانیان را بدلیل اثرات مضر آنها روی سلامتی انسان و سایر موجودات در محیط زیست بیشتر جلب کرده است. هدف از این تحقیق، تعیین میزان تجمع زیستی و دفع فلز مس، در بافت های آبشش، عضله و پوست سیاه ماهی (Capoeta fusca) می باشد. نمونه برداری ماهی از قنات های منطقه بیرجند در سال 1389 صورت گرفت. نمونه های ماهی (میانگین طول کل 54/13 سانتیمتر و وزن 45/20 گرم) پس از جمع آوری و سازگاری در محیط آزمایشگاه به مدت 10 روز، در داخل آکواریوم ها ی 40 لیتری در سه تکرار برای گروه شاهد و دو گروه آزمون تحت غلظت مس 0/25 و mg/L 0/75 قرار گرفتند. بعد از اینکه نمونه ها در معرض ماده سمی قرار گرفتند، از هر آکواریوم آزمون و شاهد، دو سیاه ماهی در زمان های مختلف تجمعی 7 ، 14 و 21 و دفع 10 روزه جهت آنالیز عنصر مس در بافت های ماهی، انتخاب شدند. نتایج نشان می دهد که بافت آبشش، یک اندام هدف برای جذب عنصر مس می باشد. غلظت مس در بافت های آبشش، عضله و پوست در دو غلظت کشندگی پایین به ترتیب µg/g 88/2، 2/1، 2/1 و بالا 8/4، 9/1 ، 9/1 می باشد. ترتیب میزان تجمع و دفع مس در بافت های سیاه ماهی به صورت آبشش, پوست, عضله است. نتیجه نهایی نشان داد که میزان دفع فلز مس بستگی به غلظت عنصر در اندام هدف، طول دوره دفع و اختلالات اندام پس از دوره انباشت دارد. | ||
| عنوان مقاله [English] | ||
| The study of bioaccumulation and elimination of copper in blackfish (Capoeta fusca) organs from the east Qantas of Iran | ||
| نویسندگان [English] | ||
| A.R Pourkhabbaz1؛ Z Mohseni2 | ||
| 1Department of Environmental Science, Birjand University | ||
| 2Msc Student of Birjand University | ||
| چکیده [English] | ||
| Contamination of aquatic ecosystems with heavy metals has been receiving increased worldwide attention due to their harmful effects on human health and other organisms in the environment. The aim of this study is to elucidate the accumulation and elimination of copper metal on the gill, muscle and skin tissues of Black fish, Capoeta fusca. Sampling was carried out from Qantas of Birjand area in 2011. Fish samples acclimatize for 10 days to laboratory conditions in aquariums after collecting. The samples with the total length of 13.45cm and the weight of 20.45gr, were put in one control group and two treatment groups containing 0.25 and 0.75mg/L CuCl2 in 40-liter aquariums with three replicates. After specimens were exposed to the polluting substance, for each of the experiment and control group, two fish were sampled at 7, 14 and 21 accumulation and 10 elimination days. The Cu level on different organs of black fish (gill, muscle, skin) was found to be 2.88, 1.2, 2.1 for lower and 4.8, 1.9 and 1.9 for higher sub-lethal concentration, respectively. Thus, the gill is a target organ for copper accumulation, and it is also the critical organ for symptoms. The accumulation and elimination level of Cu was found to follow the order gill > skin > muscle. In conclusion, depuration process of Cu element depends on several conditions such as Cu concentration in the organ target, time of depuration, and the abnormalities of organ after accumulation process. | ||
| مراجع | ||
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