scholarly journals Selenium and mercury in the hair of raccoons (Procyon lotor) and European wildcats (Felis s. silvestris) from Germany and Luxembourg

Ecotoxicology ◽  
2019 ◽  
Vol 29 (1) ◽  
pp. 1-12 ◽  
Author(s):  
Danuta Kosik-Bogacka ◽  
Natalia Osten-Sacken ◽  
Natalia Łanocha-Arendarczyk ◽  
Karolina Kot ◽  
Bogumiła Pilarczyk ◽  
...  
Keyword(s):  
Negative Correlation ◽  
Mercury Concentration ◽  
Total Mercury ◽  
Procyon Lotor ◽  
Dry Weight ◽  
Significant Negative Correlation ◽  
Molar Ratio ◽  
Total Mercury Concentration ◽  
Hair Samples

AbstractThis study examined the concentration of total mercury (THg) and selenium (Se), as well as the molar ratio of Se:THg in hair samples of terrestrial animals. THg and Se concentrations were measured from the hair of raccoons (Procyon lotor) and European wildcats (Felis s. silvestris) from Germany and Luxembourg. Median THg concentrations in hair from raccoons and wildcats were 0.369 and 0.273 mg kg−1 dry weight (dw), respectively. Se concentrations were higher in the hair of raccoons than of wildcats (0.851 and 0.641 mg kg−1 dw, respectively). Total mercury concentration in hair of raccoons from Luxembourg was almost 5× higher that found in hair of raccoons from Germany; however, Se concentration was similar. Thus, molar ratio of Se:THg was ~4× higher in the hair of raccoons from Germany than those from Luxembourg. Significant negative correlation was found between THg concentration and Se:THg molar ratio in both wildcats and raccoons.

scholarly journals A first evaluation on the use of Ardea albus feathers as bioindicators of mercury burden in Amazonian ecosystems

2009 ◽  
Vol 39 (4) ◽  
pp. 969-971 ◽  
Author(s):  
Andreza Lourdes Gomes ◽  
José Luiz Fernandes Vieira ◽  
Maria da Conceição Nascimento Pinheiro ◽  
Maria Luiza Videira Marceliano
Keyword(s):  
Mercury Concentration ◽  
Total Mercury ◽  
Prospective Trial ◽  
Dry Weight ◽  
Atomic Absorption Spectrophotometry ◽  
Average Concentration ◽  
Body Feather ◽  
Feather Sample ◽  
Total Mercury Concentration ◽  
The City

We evaluated in this study the total mercury concentration in feathers of Ardea albus collected in a colony located in the city of Belem-PA, Brazil in a prospective trial for its use as bioindicators of mercury burden in Amazonia ecosystems. An Atomic absorption spectrophotometry with gold amalgamation was used for the metal determination. The total mercury average concentration in body feathers was 2.2 ± 1.5 µg.g-1 and 1.3 ± 0.9 µg.g-1 in wing feathers. No correlation was observed between total mercury concentration and the length of body or wing feathers. Total mercury concentration was above 5 µg.g-1 dry weight in only one body feather sample.

Determination of total mercury concentration in aqueous samples with gold nanoparticles

2014 ◽  
Vol 6 (4) ◽  
pp. 1254 ◽  
Author(s):  
J. S. Crosby ◽  
J. Z. James ◽  
D. Lucas ◽  
C. P. Koshland
Keyword(s):  
Gold Nanoparticles ◽  
Mercury Concentration ◽  
Total Mercury ◽  
Aqueous Samples ◽  
Total Mercury Concentration

scholarly journals Mercury content in the wool of domestic animals in Cherepovets

2018 ◽  
Vol 7 (3) ◽  
pp. 19-23
Author(s):  
Ekaterina Sergeevna Bachina ◽  
Olga Yurievna Rumiantseva ◽  
Elena Sergeevna Ivanova ◽  
Viktor Trofimovic Komov ◽  
Marina Andreevna Guseva ◽  
...  
Keyword(s):  
Mercury Concentration ◽  
Statistical Difference ◽  
Total Mercury ◽  
Domestic Animals ◽  
Mercury Content ◽  
Average Content ◽  
Comparison Analysis ◽  
Vologda Region ◽  
Total Mercury Concentration ◽  
Mercury Analyzer

Mercury (Hg) and its compounds are considered as one of the ten major dangerous groups of chemicals. The content of mercury in the coat was 136 cats and 113 dogs in the territory of the Vologda Region in Cherepovets. The total mercury concentration in the wool samples was measured on a mercury analyzer RA-915 +. The values of the mercury index in cats range from less than 0,001 mg / kg to 13,00 mg / kg, in dogs from less than 0,001 mg / kg to 1,858 mg / kg. Statistical difference in the content of mercury in wool between cats and dogs was revealed. The Hg content in cats is 3,5 times higher than the dogs have. Comparison analysis showed the concentration of mercury in the wool of cats and dogs have no statistically significant differences. The authors noted that cats had 4 times more mercury who ate fish. The average content of Hg in the wool of dogs is slightly different for those who ate fish.

Total mercury concentration in two marine fish species, mackerel (Scomberomorus sp.) and snapper (Lutjanus sp.), from several Mexican fishing ports

2018 ◽  
Vol 25 (14) ◽  
pp. 13894-13905
Author(s):  
Martha Elena Ramírez-Islas ◽  
Alejandro De la Rosa-Pérez ◽  
Fabiola Altuzar-Villatoro ◽  
Patricia Ramírez-Romero
Keyword(s):  
Marine Fish ◽  
Fish Species ◽  
Mercury Concentration ◽  
Total Mercury ◽  
Marine Fish Species ◽  
Total Mercury Concentration

scholarly journals Gerris spinolaeLethierry and Severin (Hemiptera: Gerridae) andBrachydeutera longipesHendel (Diptera: Ephydridae): Two Effective Insect Bioindicators to Monitor Pollution in Some Tropical Freshwater Ponds under Anthropogenic Stress

2012 ◽  
Vol 2012 ◽  
pp. 1-10
Author(s):  
Arijit Pal ◽  
Devashish Chandra Sinha ◽  
Neelkamal Rastogi
Keyword(s):  
Dissolved Oxygen ◽  
Negative Correlation ◽  
Dry Weight ◽  
Significant Negative Correlation ◽  
Positive Correlation ◽  
Freshwater Ponds ◽  
Abundance Patterns ◽  
Water Quality Variable ◽  
Free Carbon Dioxide ◽  
Tropical Freshwater

The abundance patterns of two insects,Gerris spinolaeandBrachydeutera longipes, were found to be affected by abiotic aquatic factors including free carbon dioxide, dissolved oxygen, BOD, and phosphate concentrations prevailing in four tropical freshwater ponds, three of which being anthropogenically stressed. Regression analysis between each individual-independent water quality variable and insect abundance demonstrated a significant positive correlation in each case betweenB. longipesabundance and BOD, phosphate, free CO2, and algae dry weight, while a significant negative correlation of each of these variables was found withGerris spinolaeabundance. Moreover, a significant negative correlation ofB. longipesabundance was calculated with dissolved oxygen concentration, whileG. spinolaeabundance exhibited a positive correlation with the same. Thus,G. spinolaeappears to be a pollution sensitive, effective bioindicator for healthy unpolluted ponds, whileB. longipeshas potential as a pollution-resistant insect species indicative of pollution occurrence.

UV Absorbance By Thallus Extracts of Umbilicate Lichens

1993 ◽  
Vol 25 (4) ◽  
pp. 415-422 ◽  
Author(s):  
Dianne Fahselt
Keyword(s):  
Negative Correlation ◽  
Dry Weight ◽  
Significant Negative Correlation ◽  
Enzyme Polymorphism ◽  
Uv Absorbance ◽  
Banding Patterns

AbstractEleven stands of umbilicate lichens exhibiting a range of variabilities in enzyme banding patterns were compared on the basis of the ultraviolet (UV)absorbing properties of thallus extracts. Stands of Umbilicaria veilea, which were some of the most variable enzymatically, had the lowest UV absorbancy in extracts, and stands of Lasallia papulosa, which were among the least variable enzymatically, showed more UV absorbance than others. Umbilicaria deusta, U. muhlenbergii and U. mammulata had intermediate levels of absorbance. Negative correlations (P = 005–007) were found between enzyme polymorphism and UV absorbance in the ranges 215–220, 269–271 and 304–305 nm. There was also a significant negative correlation at P = 003 between enzyme variability and thallus dry weight extractable with either ethanol or acetone.

Species differences in total mercury concentration in gulls from the Gulf of Gdansk (Southern Baltic)

2016 ◽  
Vol 33 ◽  
pp. 100-109 ◽  
Author(s):  
Emilia Szumiło-Pilarska ◽  
Agnieszka Grajewska ◽  
Lucyna Falkowska ◽  
Julia Hajdrych ◽  
Włodzimierz Meissner ◽  
...  
Keyword(s):  
Mercury Concentration ◽  
Total Mercury ◽  
Species Differences ◽  
Gulf Of Gdańsk ◽  
Total Mercury Concentration ◽  
Gulf Of Gdansk ◽  
Southern Baltic

Total mercury concentration in the fur of free-ranging giant otters in a large Neotropical floodplain

2020 ◽  
pp. 110483
Author(s):  
Grazielle Soresini ◽  
Fabiano Aguiar da Silva ◽  
Caroline Leuchtenberger ◽  
Guilherme Mourão
Keyword(s):  
Mercury Concentration ◽  
Total Mercury ◽  
Total Mercury Concentration ◽  
Neotropical Floodplain ◽  
Free Ranging

Polar microbes and their implications in the aquatic mercury cycle

2020 ◽  
Author(s):  
Céline Lavergne ◽  
Lars-Eric Heimburger ◽  
Patricia Bovio-Winkler ◽  
Rolando Chamy ◽  
Léa Cabrol
Keyword(s):  
Mercury Concentration ◽  
Total Mercury ◽  
Inorganic Mercury ◽  
Atmospheric Mercury ◽  
Aquatic Systems ◽  
Tierra Del Fuego ◽  
South Shetland Islands ◽  
P Value ◽  
Beaver Ponds ◽  
Total Mercury Concentration

<p>The methylmercury has the feature, in addition to its high toxicity for living organisms, to be easily incorporated, bioaccumulated and biomagnified through the food web in aquatic systems. Recently, the microorganisms implicated in the transformation of mercury to methylmercury have been found much more diverse than previously thought. Among them, 9 methanogenic Archaea strains are able to methylate the mercury in pure culture. However, few proofs exist <em>in situ</em> in polar aquatic systems. Antarctic polar regions receive atmospheric mercury through long-range transport of foreign emissions. In a context of increasing releases of heavy metals in aquatic environments and atmosphere, it is a crucial objective to elucidate the fate of mercury in Antarctic polar aquatic ecosystems and the role Archaea could play in mercury transformations. Hence, microbial diversity was investigated in pristine Antarctic lakes (South Shetland Islands, Antarctic, Chile) and continental sub-Antarctic beaver ponds (Tierra del Fuego, Chile) where benthic total mercury concentration was 14 ±6.5 and 89 ±13 ppm, respectively. Until 6.3% of the active community could be constituted by putative methylators and a positive significant correlation was found between total mercury concentration and putative methylator relative abundance (linear model, p-value=0.001). Putative methylator Archaea <em>Methanoregula</em> and <em>Methanosphaerula</em> have been detected but did not seem active in the studied ecosystems (RNA metabarcoding VS DNA metabarcoding).</p><p>Combined with these molecular data, mercury methylation and methylmercury demethylation activities were performed by addition of enriched stables isotopes of inorganic mercury and methylmercury, respectively and we expect to find highest methylation rates in the rich-organic matter ecosystems such as sub-Antarctic beaver ponds.</p>

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