Ecotoxicological Studies on Daphnia magna
In this study we used Daphnia magna as an index organism for ecotoxicological studies. In order to determine the filtration and ingestion rates in Daphnia magna, we used algea Chlorella volgaris (10 mg/1). Prior to the tests, the acute toxicity of the herbicides Machete and Saturn and the pesticides...
Main Author: | |
---|---|
Format: | Article |
Language: | fas |
Published: |
Iranian Fisheries Research Organization
1997-01-01
|
Series: | Majallah-i ̒Ilmī-i Shīlāt-i Īrān |
Subjects: | |
Online Access: | http://isfj.areo.ir/article_116032_en.html |
id |
doaj-84bf5fdf5a3443cf8005afba783e0320 |
---|---|
record_format |
Article |
spelling |
doaj-84bf5fdf5a3443cf8005afba783e03202020-11-25T02:13:06ZfasIranian Fisheries Research OrganizationMajallah-i ̒Ilmī-i Shīlāt-i Īrān1026-13542322-59981997-01-01622332Ecotoxicological Studies on Daphnia magnaM. Piri; Sh. Nezami; Gh. Amini ranjbar; V. AregIn this study we used Daphnia magna as an index organism for ecotoxicological studies. In order to determine the filtration and ingestion rates in Daphnia magna, we used algea Chlorella volgaris (10 mg/1). Prior to the tests, the acute toxicity of the herbicides Machete and Saturn and the pesticides Diazinon and Malathion, in order to calculate their EC50, were determined. The concentrations which caused the same mortality rate in 24 hours as the EC50 concentrations of these chemical did, were 18.49 mg/1 for Machete, 4.46mg/1 for Saturn, 0.31 gr/1 for Diazinon and 1.5 grit for Malathion. In order to study the toxic effect of Machete, Saturn, Diazinon and Malathion on the filtration and ingestion rates, Daphnia magna was exposed to Ec50, 3/4 Ec50 ,1/2 Ec50 and 1/4 Ec50 concentrations. The rates were reduced after the organism had been exposed to these toxic chemicals for 5 hours. The effective concentrations at which feeding rate were reduced by 50%, compared to the controls, were for h.....http://isfj.areo.ir/article_116032_en.htmlratecontrolstoxic |
collection |
DOAJ |
language |
fas |
format |
Article |
sources |
DOAJ |
author |
M. Piri; Sh. Nezami; Gh. Amini ranjbar; V. Areg |
spellingShingle |
M. Piri; Sh. Nezami; Gh. Amini ranjbar; V. Areg Ecotoxicological Studies on Daphnia magna Majallah-i ̒Ilmī-i Shīlāt-i Īrān rate controls toxic |
author_facet |
M. Piri; Sh. Nezami; Gh. Amini ranjbar; V. Areg |
author_sort |
M. Piri; Sh. Nezami; Gh. Amini ranjbar; V. Areg |
title |
Ecotoxicological Studies on Daphnia magna |
title_short |
Ecotoxicological Studies on Daphnia magna |
title_full |
Ecotoxicological Studies on Daphnia magna |
title_fullStr |
Ecotoxicological Studies on Daphnia magna |
title_full_unstemmed |
Ecotoxicological Studies on Daphnia magna |
title_sort |
ecotoxicological studies on daphnia magna |
publisher |
Iranian Fisheries Research Organization |
series |
Majallah-i ̒Ilmī-i Shīlāt-i Īrān |
issn |
1026-1354 2322-5998 |
publishDate |
1997-01-01 |
description |
In this study we used Daphnia magna as an index organism for ecotoxicological studies. In order to determine the filtration and ingestion rates in Daphnia magna, we used algea Chlorella volgaris (10 mg/1). Prior to the tests, the acute toxicity of the herbicides Machete and Saturn and the pesticides Diazinon and Malathion, in order to calculate their EC50, were determined. The concentrations which caused the same mortality rate in 24 hours as the EC50 concentrations of these chemical did, were 18.49 mg/1 for Machete, 4.46mg/1 for Saturn, 0.31 gr/1 for Diazinon and 1.5 grit for Malathion. In order to study the toxic effect of Machete, Saturn, Diazinon and Malathion on the filtration and ingestion rates, Daphnia magna was exposed to Ec50, 3/4 Ec50 ,1/2 Ec50 and 1/4 Ec50 concentrations. The rates were reduced after the organism had been exposed to these toxic chemicals for 5 hours. The effective concentrations at which feeding rate were reduced by 50%, compared to the controls, were for h..... |
topic |
rate controls toxic |
url |
http://isfj.areo.ir/article_116032_en.html |
work_keys_str_mv |
AT mpirishnezamighaminiranjbarvareg ecotoxicologicalstudiesondaphniamagna |
_version_ |
1724906322919424000 |