scholarly journals Acute and Chronic Toxicity of Endocrine Disruptive Heavy Metals and Pesticides Exposed to Freshwater Fish P. reticulata and P. sphenops

2021 ◽  
Vol 16 (2) ◽  
pp. 427-435
Author(s):  
Vidhya Varghese ◽  
N. Nagarani ◽  
A. Balasubramani
Keyword(s):  
Heavy Metals ◽  
Chronic Toxicity ◽  
World Wide ◽  
Poecilia Reticulata ◽  
Exposed Fish ◽  
Aquarium Fish ◽  
Safe Level ◽  
Highly Sensitive ◽  
Pesticides Exposure ◽  
Poecilia Sphenops

Environmental monitoring is a recent world-wide approach to save the future in line. The present study focuses on toxicity of heavy metals and pesticides on the freshwater aquarium fish (Poecilia reticulata and Poecilia sphenops). The study intense on drawing the acute and chronic safe levels of metals and pesticide exposed to 96 h and 28 day respectively. On exposure, the fish were observed to be under stress and showed excitability. It was observed that both species were highly sensitive to arsenic and cypermethrin, meanwhile resistant to cadmium and chlorpyrifos. The acute safe levels for As irrespective of species was comparatively lesser than that of Cd exposed fish and the range of safe values for pesticides exposure were between 0.018 and 0.059 ppb. As the water quality is influencedby many environmental factors, the present study helps the aquarist in monitoring the safe level of toxicants in the medium. This in turn increases the economic growth of the aquarist.

scholarly journals Comparison of Joint Effect of Acute and Chronic Toxicity for Combined Assessment of Heavy Metals on Photobacterium sp.NAA-MIE

2021 ◽  
Vol 18 (12) ◽  
pp. 6644
Author(s):  
Nur Adila Adnan ◽  
Mohd Izuan Effendi Halmi ◽  
Siti Salwa Abd Gani ◽  
Uswatun Hasanah Zaidan ◽  
Mohd Yunus Abd Shukor
Keyword(s):  
Heavy Metals ◽  
Chronic Toxicity ◽  
Mixture Toxicity ◽  
Joint Effect ◽  
Antagonistic Effect ◽  
Acute Test ◽  
Acute And Chronic Toxicity ◽  
Toxicological Studies ◽  
Luminescence Inhibition ◽  
Toxicity Unit

Predicting the crucial effect of single metal pollutants against the aquatic ecosystem has been highly debatable for decades. However, dealing with complex metal mixtures management in toxicological studies creates a challenge, as heavy metals may evoke greater toxicity on interactions with other constituents rather than individually low acting concentrations. Moreover, the toxicity mechanisms are different between short term and long term exposure of the metal toxicant. In this study, acute and chronic toxicity based on luminescence inhibition assay using newly isolated Photobacterium sp.NAA-MIE as the indicator are presented. Photobacterium sp.NAA-MIE was exposed to the mixture at a predetermined ratio of 1:1. TU (Toxicity Unit) and MTI (Mixture Toxic Index) approach presented the mixture toxicity of Hg2+ + Ag+, Hg2+ + Cu2+, Ag+ + Cu2+, Hg2+ + Ag+ + Cu2+, and Cd2+ + Cu2+ showed antagonistic effect over acute and chronic test. Binary mixture of Cu2+ + Zn2+ was observed to show additive effect at acute test and antagonistic effect at chronic test while mixture of Ni2+ + Zn2+ showing antagonistic effect during acute test and synergistic effect during chronic test. Thus, the strain is suitable and their use as bioassay to predict the risk assessment of heavy metal under acute toxicity without abandoning the advantage of chronic toxicity extrapolation.

scholarly journals Highly Sensitive AgNP/MWCNT/Nafion Modified GCE-Based Sensor for the Determination of Heavy Metals in Organic and Non-organic Vegetables

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Shirley Tiong Palisoc ◽  
Michelle Tiamzon Natividad ◽  
Nico De Jesus ◽  
Joshua Carlos
Keyword(s):  
Heavy Metals ◽  
Highly Sensitive ◽  
Organic Vegetables

scholarly journals Isolation of Tetrahymena pyriformis From Several Infected Pet Fish Species And a Regime For Its Treatment

2005 ◽  
Vol 29 (1) ◽  
pp. 190-195
Author(s):  
Omar Bassim Ahmed Al- Tayyar
Keyword(s):  
Methylene Blue ◽  
Water Temperature ◽  
Carassius Auratus ◽  
Poecilia Reticulata ◽  
Tetrahymena Pyriformis ◽  
Infected Fish ◽  
Mucus Hypersecretion ◽  
Goldfish Carassius Auratus ◽  
Poecilia Sphenops ◽  
Pterophyllum Scalare

Tetrahymena pyriformis has been firstly isolated from brood Goldfish(Carassius auratus) Common, Fantail, Ryukin, Veiltail and Moor, Black molly(Poecilia sphenops), Gourami (Trichogaster trichopterus), red Swordtail(Xiphophorus helleri), Guppy (Poecilia reticulata), deep Angelfish(Pterophyllum scalare) and brood Algae eater (Hypostomus plecostomus) inIraq. The infected fish suffered from mucus hypersecretion large hyperemicareas on the skin, and slight shedding of the scales. The incidence percentage ofinfection was 100 %. Rising water temperature was up to 29 – 30cْ for one timeand methylene blue was at a concentration of 5 ppm for 24 hours. Sodiumchloride at a concentration of 2 % for one minute and two minutes has noobvious effect on Tetrahymena pyriformis. Treatment with NaCl at theconcentration of 1% for 20 minutes for three consecutive days achieved the bestresults.

scholarly journals PARTIAL CHRONIC TOXICITY TEST OF COPPER (Cu2+), ZINC (Zn2+) and CYANIDE (Cn+) FOR YOUNG COBIA FISH (Rachycentron canadum)

2008 ◽  
Vol 33 (1) ◽  
pp. 49-53
Author(s):  
Le Quang Dung ◽  
Nguyen Duc Cu
Keyword(s):  
Heavy Metals ◽  
Growth Rate ◽  
Statistical Analysis ◽  
Chronic Toxicity ◽  
The Body ◽  
Toxicity Tests ◽  
Fish Length ◽  
Toxic Substances ◽  
Rachycentron Canadum ◽  
Copper Zinc

The partial toxicity tests of copper (Cu2+), zinc (Zn2+) and cyanide (CN-) for young cobia (Rachycentron canadum) fishes 45 days-old were conducted in Doson station during ten days (yr 2005). These three toxic substances affected strongly the growth rate of the Cobia fish (length and weight of the body), even at the lowest treated concentration. The LC50 values of copper, zinc and cyanide were 0.32 mg l-1; over mg l-1 and 0,049 mg l-1, respectively. Based on the statistical analysis of growth rate of cobia by determining 1C25, IC50, NOEC and LOEC values, we have addressed the safe concentrations of these two heavy metals and cyanide in the environmental aquaculture which must be lower than 0.025 mg Cu l-1, 0.5 mg Zn l-1 and 0.005 mg CN l-1, respectively. The result also showed that cyanide was the most toxic to Cobia, followed by copper and zinc.

scholarly journals Changes in serum biochemistry of fish, Catla catla in response to metal toxicity

2020 ◽  
Vol 3 (1) ◽  
pp. 41-45
Author(s):  
Wardah Hassan ◽  
Sajid Abdullah ◽  
Naila Hadayat ◽  
Huma Naz ◽  
Shakeela Parveen
Keyword(s):  
Heavy Metals ◽  
Metal Toxicity ◽  
Biochemical Parameters ◽  
Serum Biochemistry ◽  
Catla Catla ◽  
Target Tissue ◽  
Serum Biochemical Parameters ◽  
Exposed Fish ◽  
Treated Fish ◽  
Serum Biochemical

In the present study an attempt has been made to evaluate the effect of heavy metals i.e. nickel (Ni) and zinc (Zn) on the serum biochemical parameters of Catla catla. The fish were exposed to lethal concentrations (96-hr LC50) of selected metals. The studied serum biochemical parameters were sodium (Na), potassium (K), chloride (Cl), albumin (Alb), urea (U), glucose (Glu), aspartate aminotransferase (Ast) and alanine aminotransferase (Alt). Results revealed a decrease in Na, Cl and Alb levels of metal exposed fish at all exposure periods as compared to control. However, an increase in K, U, Glu, Ast and Alt levels was observed in the metal exposed fish. All the biochemical parameters showed significant dependence on exposure durations in both treated fish except Na and Alb in Zn treated fish. This study indicated that the alterations in serum biochemical parameters may be the result of the target tissue damage and dysfunction induced by the metal and that these parameters can thus be used to assess the toxic effects of metals on organisms.

scholarly journals A simple electrochemical sensor based on rGO/MoS2/CS modified GCE for highly sensitive detection of Pb(ii) in tobacco leaves

RSC Advances ◽  
2021 ◽  
Vol 11 (47) ◽  
pp. 29590-29597
Author(s):  
Chuanen Guo ◽  
Chengxiang Wang ◽  
Hongyan Sun ◽  
Dongmei Dai ◽  
Hongtao Gao
Keyword(s):  
Heavy Metals ◽  
Electrochemical Sensor ◽  
Crucial Role ◽  
High Performance ◽  
Electrochemical Determination ◽  
Tobacco Leaves ◽  
Highly Sensitive ◽  
Highly Sensitive Detection ◽  
Sensor Detection

High-performance electrode modification materials play a crucial role in improving the sensitivity of sensor detection in electrochemical determination of heavy metals.

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