Elham Madani; azam moshfegh; Mahbubeh Setorki; Akram Tehranifard
Abstract
Glyphosate based pesticides are safe for humans, but their widespread use in agricultural areas and water contamination raised serious concerns about its toxicity. The aim of this study was to investigate the effects of different doses of roundup on body weight, gonadosomatic index (GSI) and histological ...
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Glyphosate based pesticides are safe for humans, but their widespread use in agricultural areas and water contamination raised serious concerns about its toxicity. The aim of this study was to investigate the effects of different doses of roundup on body weight, gonadosomatic index (GSI) and histological alterations of gill and testis in common carp. 32 common carp broodstock (1723.75 ± 72.72gr) were randomly divided into 4 groups of 8 fish. . One group (control) had no exposure to herbicide and 3 groups (treatment) were exposed to rounduppesticide at 4 concentrations (5, 10 and 15 mg/L) for 10 days. After treatment period, body length, body weight and GSI index were determined and gill and testis samples were prepared for histological studies. Based on the results, exposure to roundup at a dose of 20 mg/L caused a significant decrease in body weight on the10th day and GSI index on the 5th and 10th day (p<0.05). In fishes exposed to roundup (20mg/L) necrosis and disintegration of gill lamellae structure, adhesions of gill lamellae, separation of basement membrane and damage of gill epithelium and exudation of blood cells were observed. In the testis of fish exposed to the highest dose of roundup, an increase in the number of spermatogonium due to reduced spermatogenesis, degradation of spermatocyte, reduction of spermatozoa, reduction of sperm storage tubules diameter and destruction of interstitial duct and sertoli cells were observed. The results indicated destructive effects of sublethal doses of roundup on gill structure and reproductive performance of common carp.
Mohammad Forouhar Vajargah; Seyed Aliakbar Hedayati
Abstract
Abstract One of the most important factors that today is important with the risks associated of the growing industry and technology, is plant pesticides that can lead to the destruction of aquatic communities in the long times by entering aquatic ecosystems. So in current study acute toxicity of butachlor ...
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Abstract One of the most important factors that today is important with the risks associated of the growing industry and technology, is plant pesticides that can lead to the destruction of aquatic communities in the long times by entering aquatic ecosystems. So in current study acute toxicity of butachlor poison that is a very common at the agricultural plant was studied in 5-7 gr common carp and Caspian roach for detection of LC50 at 96 hour. Experiment was in static plan and based on the OECD standard conducted for 4 days; water physicochemical parameters including PH, dissolved oxygen and temperature were measured that they were in suitable ranges. Based on the results, acute toxicity of butachlor on carp and Caspian roach were 0.785 and 0.258 mg/l respectively and maximum allowable concentration MAC value were calculated as 0.078 and 0.025 mg/l respectively. According to the standard for determine of the toxicity of various pesticides, butachlor was considered more highly toxic for Caspian roach than common carp.
Kazem Parivar; Nasim Hayati Roodbari; Alireza Badiei; Roghiyeh Taghizadeh Hajiagha
Volume 4, Issue 1 , September 2015, , Pages 1-10
Abstract
Abstract Increase in the use of nano zinc oxide in medicine, manufacturing cosmetic products and research, have raised the questions about their toxicity. Zinc has direct role in growth, maturation and ovulation through influence on production of estradiol and progesterone. In this study the effects ...
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Abstract Increase in the use of nano zinc oxide in medicine, manufacturing cosmetic products and research, have raised the questions about their toxicity. Zinc has direct role in growth, maturation and ovulation through influence on production of estradiol and progesterone. In this study the effects of nano zinc oxide on oogenesis of adult NMRI mouse strain have been investigated. The adult female mice were randomly divided into six groups, including control, sham and four experimental groups. Experimental groups were injected nano-ZnO (50-100-150-300 mg/kgbw) Intraperito-neally, respectively for 3 days. After 7 day, histological changes of ovaries were studied. Data indicated increase of numbers of Graafian follicles and corpora lutea in 100 and 150 mg/kg bw doses. Increase in estradiol and progestron levels with increase on dose was observed. Data indicated increase of numbers of atretic follicles with decreased body weight in higher doses. Results indicated oogenesis under 100 and 150 doses nano-Zno has improved with enhancing the number of Graafian follicles and corpora lutea, and decrease of body weight and increase of number of atretic follicles under higher doses. The results also indicated that nano-Zno has toxic effects on reproductive organs in female animal.
