scholarly journals Concentration of Mercury in the Livers of Small Terrestrial Rodents from Rural Areas in Poland

Molecules ◽  
2019 ◽  
Vol 24 (22) ◽  
pp. 4108 ◽  
Author(s):  
Maciej Durkalec ◽  
Agnieszka Nawrocka ◽  
Jacek Żmudzki ◽  
Aleksandra Filipek ◽  
Marcin Niemcewicz ◽  
...  
Keyword(s):  
Rural Areas ◽  
Feeding Habits ◽  
Common Vole ◽  
Absorption Spectrometry ◽  
Myodes Glareolus ◽  
Terrestrial Mammals ◽  
Direct Mercury Analyzer ◽  
Mercury Analyzer ◽  
Wet Weight ◽  
Study Sites

Small terrestrial mammals could be used as accumulative biomonitors of different environmental contaminants, but the knowledge of the level of Hg in their bodies is scant. The aim of our research was to verify the factors influencing Hg bioaccumulation and to analyze the concentration of total mercury (Hg) in the livers of four species of wild terrestrial rodents from different rural areas of Poland: the yellow-necked mouse (Apodemus flavicollis), striped field mouse (Apodemus agrarius), common vole (Microtus arvalis), and bank vole (Myodes glareolus). The concentration of total Hg was analyzed in liver tissue by atomic absorption spectrometry using a direct mercury analyzer. The concentration of Hg found in the livers of rodents ranged from <1 to 36.4 µg/kg of wet weight, differed between study sites, species, and sexes, and was related to body weight. We addressed feeding habits as potential causes of differences in liver Hg concentration among species.

scholarly journals Toxicity and Organ Distribution of Mercury in Freshwater Fish (Oreochromis niloticus) after Exposure to Water Contaminated Mercury (HgII)

Toxics ◽  
2019 ◽  
Vol 7 (4) ◽  
pp. 58
Author(s):  
Suhendrayatna ◽  
Arahman ◽  
Sipahutar ◽  
Rinidar ◽  
Elvitriana
Keyword(s):  
Freshwater Fish ◽  
Oreochromis Niloticus ◽  
Total Concentration ◽  
Absorption Spectrometry ◽  
Dry Weight ◽  
Mean Value ◽  
Organ Distribution ◽  
Mercury Analyzer ◽  
Wet Weight ◽  
Probit Method

The purpose of this study was to investigate the toxicity and the distribution of mercury (Hg) in the main tissues of freshwater fish (Oreochromis niloticus) after being exposed to water containing Hg(II). A sample group of 10 fish, of mean weight 80–100 g wet weight, were exposed to different concentrations of Hg (0.0012; 0.0049; 0.0141; 0.0524; 0.1126; and 0.5110 mg-HgII/L) for 72 hours under controlled conditions using the static method in ponds. A control medium was also prepared in two replications. Mortality of fish was closely monitored, and the test was repeated three times. For the toxicity test, observations were based on behavior, mortality, and anatomical pathology. The methodology was based on the OECD guidelines for testing of chemicals and lethal concentration (LC50) and particularly using the probit method. Thus, the mean value was obtained from two replications and then further calculated by a software (MiniTab® 16 version). Prior to analysis, samples were first lyophilized. The total concentration of Hg accumulation in the fish organs was analyzed using heat-vaporization atomic absorption spectrometry (HV-AAS) and a MA2000 automatic mercury analyzer. Results showed that toxicity (LC50) of freshwater fish was 0.1435 mg-Hg(II)/L. The internal organs showed some pathological changes including pale gills, anemic eyes, and a whitish body color after the exposure. Furthermore, histopathologically, exposure to mercury might also affect other organs, such as gills, liver, and hepatopancreas. Mercury was found in trace amounts, and its accumulation was found to be at least in the gills. Meanwhile, the highest accumulation was found in the muscle tissue with approximately 5.7183 µg/g dry weight. If they are put in order, the mercury accumulation in the tissue organs was varied from the highest to lowest one: Muscle > eye > bone > head > gill. Finally, it can be concluded that the Hg exposure could affect the histopathological condition of the tested fish.

Comparison of ICP-MS and direct mercury analyzer for the analysis of mercury in pharmaceuticals

Planta Medica ◽  
2015 ◽  
Vol 81 (16) ◽  
Author(s):  
Y Kho ◽  
M Kim ◽  
NY Park ◽  
H Park ◽  
JH Shin
Keyword(s):  
Direct Mercury Analyzer ◽  
Icp Ms ◽  
Mercury Analyzer

Trace Elements and Metals in Farmed Sea Bass and Gilthead Bream from Tenerife Island, Spain

2011 ◽  
Vol 74 (11) ◽  
pp. 1938-1943 ◽  
Author(s):  
C. RUBIO ◽  
A. JALILLI ◽  
A. J. GUTIÉRREZ ◽  
D. GONZÁLEZ-WELLER ◽  
F. HERNÁNDEZ ◽  
...  
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Sparus Aurata ◽  
Graphite Furnace ◽  
Sea Bass ◽  
Absorption Spectrometry ◽  
Lead And Cadmium ◽  
Flame Atomic Absorption ◽  
Tenerife Island ◽  
Wet Weight

The aim of this study was to determine the levels of metals (Ca, K, Na, Mg) and trace metals (Ni, Fe, Cu, Mn, Zn, Pb, Cd) in two fish species (gilthead bream [Sparus aurata] and sea bass [Dicentrarchus labrax]) collected from fish farms located along the coast of Tenerife Island. Ca, K, Na, Mg, Fe, Cu, Zn, and Mn were measured by flame atomic absorption spectrometry, whereas Pb, Cd, and Ni were determined using graphite furnace atomic absorption spectrometry. Mean Fe, Cu, Mn, and Zn contents were 3.09, 0.59, 0.18, and 8.11 mg/kg (wet weight) in S. aurata and 3.20, 0.76, 0.24, and 10.11 mg/kg (wet weight) in D. labrax, respectively. In D. labrax, Ca, K, Na, and Mg levels were 1,955, 2,787, 699.7, and 279.2 mg/kg (wet weight), respectively; in S. aurata, they were 934.7, 3,515, 532.8, and 262.8 mg/kg (wet weight), respectively. The Pb level in S. aurata was 7.28 ±3.64 μg/kg (wet weight) and, in D. labrax, 4.42 ±1.56 μg/kg (wet weight). Mean Cd concentrations were 3.33 ±3.93 and 1.36 ± 1.53 μg/kg (wet weight) for D. labrax and S. aurata, respectively. All Pb and Cd levels measured were well below the accepted European Commission limits, 300 and 50 μg/kg for lead and cadmium, respectively.

scholarly journals Foraging behavior and diet of the vulnerable Cinereous Warbling-finch Poospiza cinerea (Aves, Emberizidae)

2014 ◽  
Vol 74 (4) ◽  
pp. 821-827 ◽  
Author(s):  
U Wischhoff ◽  
F Marques-Santos ◽  
M Rodrigues
Keyword(s):  
South America ◽  
Foraging Behavior ◽  
Rare Species ◽  
Feeding Habits ◽  
Reproductive Organs ◽  
Substrate Use ◽  
Food Items ◽  
Niche Specialization ◽  
Study Sites ◽  
Central South

The Cinereous Warbling-finch Poospiza cinerea is a globally vulnerable Emberizidae passerine, patchily distributed and rare in the open savannah of central South America. Attributes of rare species include niche specificity such as feeding habits. To verify possible niche specialization in this species we aimed to describe its foraging habits related to substrate use, foraging and substrate height, attack maneuvers, and consumed food items. We monitored two groups at two study sites and sampled foraging events with intervals of 15 minutes. The substrates used in greater frequency were foliage and reproductive organs. Foraging and substrate height varied widely with study area. The attack maneuver adopted in greater frequency was glean. Most food items attacked were small invertebrates. Big invertebrates included Lepidoptera, Hemiptera, Coleoptera, Hymenoptera and Orthoptera. Poospiza cinerea was also recorded foraging in mixed bird flocks with seven other species. The generalist foraging behavior of the species cannot be associate to its rarity.

scholarly journals Investigation of Hg Content by a Rapid Analytical Technique in Mediterranean Pelagic Fishes

2018 ◽  
Author(s):  
Giuseppa Di Bella ◽  
Roberta Tardugno ◽  
Nicola Cicero
Keyword(s):  
Mediterranean Sea ◽  
Mediterranean Area ◽  
Pelagic Fish ◽  
Analytical Technique ◽  
Weekly Intake ◽  
Tolerable Weekly Intake ◽  
Direct Mercury Analyzer ◽  
Mercury Analyzer ◽  
Global Concern ◽  
The Mediterranean

Mercury (Hg) fish and seafood contamination is a global concern and needs worldwide sea investigations in order to protect consumers. The aim of this study was to investigate the Hg concentration by means of a rapid and simple analytical technique with direct Mercury Analyzer (DMA-80) in pelagic fish species, Tetrapturus belone (spearfish), Thunnus thynnus (tuna) and Xiphias gladius (swordfish) caught in the Mediterranean Sea. Hg contents were evaluated also in Salmo salar (salmon) as pelagic fish not belonging to the Mediterranean area. The results obtained were variable ranging between 0,015-2,562 mg kg-1 for T. thynnus specie, 0,477-3,182 mg kg-1 for X. gladius, 0,434-1,730 mg kg-1 for T. belone and 0,004-0,019 mg kg-1 for S. salar, respectively. The total Hg tolerable weekly intake (TWI) and % tolerable weekly intake (TWI%) values according to the European Food Safety Authority (EFSA) were calculated. The results highlighted that the pelagic species caught in the Mediterranean Sea should be constantly monitored due to their high Hg contents as well as their TWI and TWI% with respect to S. salar samples.

scholarly journals Habitat degradation and indiscriminate hunting differentially impact faunal communities in the Southeast Asian tropical biodiversity hotspot

2019 ◽  
Vol 2 (1) ◽  
Author(s):  
Andrew Tilker ◽  
Jesse F. Abrams ◽  
Azlan Mohamed ◽  
An Nguyen ◽  
Seth T. Wong ◽  
...  
Keyword(s):  
Habitat Degradation ◽  
Camera Trap ◽  
Vertebrate Species ◽  
Terrestrial Mammals ◽  
Extinction Rates ◽  
Tropical Biodiversity ◽  
Faunal Communities ◽  
Study Sites ◽  
Functional Extinction ◽  
Conservation Interventions

Abstract Habitat degradation and hunting have caused the widespread loss of larger vertebrate species (defaunation) from tropical biodiversity hotspots. However, these defaunation drivers impact vertebrate biodiversity in different ways and, therefore, require different conservation interventions. We conducted landscape-scale camera-trap surveys across six study sites in Southeast Asia to assess how moderate degradation and intensive, indiscriminate hunting differentially impact tropical terrestrial mammals and birds. We found that functional extinction rates were higher in hunted compared to degraded sites. Species found in both sites had lower occupancies in the hunted sites. Canopy closure was the main predictor of occurrence in the degraded sites, while village density primarily influenced occurrence in the hunted sites. Our findings suggest that intensive, indiscriminate hunting may be a more immediate threat than moderate habitat degradation for tropical faunal communities, and that conservation stakeholders should focus as much on overhunting as on habitat conservation to address the defaunation crisis.

scholarly journals Determination of Hg in Farmed and Wild Atlantic Bluefin Tuna (Thunnus thynnus L.) Muscle

Molecules ◽  
2019 ◽  
Vol 24 (7) ◽  
pp. 1273 ◽  
Author(s):  
Anna Annibaldi ◽  
Cristina Truzzi ◽  
Oliana Carnevali ◽  
Paolo Pignalosa ◽  
Martina Api ◽  
...  
Keyword(s):  
Microwave Digestion ◽  
Health Benefit ◽  
Absorption Spectrometry ◽  
Bluefin Tuna ◽  
Mediterranean Area ◽  
Human Consumption ◽  
Thunnus Thynnus ◽  
Atlantic Bluefin Tuna ◽  
Wet Weight ◽  
The Mediterranean

Mercury (Hg) is a well-known toxic element, diffused in the environment, especially in the Mediterranean Sea which is rich in cinnabar deposits. Mercury bioaccumulation in fish is of great concern, especially for top-level aquatic predators (e.g., shark, tuna, swordfish) and above all for species of large human consumption and high nutritional value. This work aimed to determine Hg concentrations in farmed and wild Atlantic Bluefin tuna (Thunnus thynnus) caught in the Mediterranean area in order to evaluate the level of Hg bioaccumulation. selenium (Se) content was also determined, since this element is an antagonist of mercury toxicity. Mercury and Se were analysed by atomic absorption spectrometry after microwave digestion of the samples. Hg content in farmed tuna was below the legal limit (1 mg/kg, wet weight, w.w.) for all specimens (0.6 ± 0.2 mg/kg), whereas the wild ones had a content over the limit (1.7 ± 0.6 mg/kg); Se concentration was higher in farmed specimens (1.1 ± 0.9 mg/kg) compared to wild ones (0.6 ± 0.3 mg/kg). A safe seafood could show a Se/Hg ratio >1 and a health benefit value (HBVSe) > 0: farmed tuna had higher values than the wild specimens (Se/Hg 5.48 vs. 1.32; HBVSe 11.16 vs. 0.29). These results demonstrate that for Hg, there is a better risk/benefit ratio in farmed T. thynnus. making it safer than wild tuna.

Observations on dugongs at Calauit Island, Busuanga, Palawan, Phillipines

1994 ◽  
Vol 21 (6) ◽  
pp. 709 ◽  
Author(s):  
LV Aragones
Keyword(s):  
The Philippines ◽  
Thalassia Hemprichii ◽  
Halophila Ovalis ◽  
Direct Observations ◽  
Seagrass Biomass ◽  
Wet Weight ◽  
Cymodocea Rotundata ◽  
Syringodium Isoetifolium ◽  
Study Sites ◽  
Vantage Points

A simultaneous monitoring system that used a team of local observers to count dugongs around Calauit Island, Busuanga, Palawan, Philippines, from eight vantage points was employed from March 1989 to May 1990 to identify important dugong habitats around the island. On average, five dugongs were seen per survey day. More dugongs were observed during March and July 1989 than in other months. These periods coincided with the bimodal peaking of seagrass biomass in the region and the lull between monsoons for that year. The site where dugongs were most often sighted was about 1.5 m deep, had the largest area of seagrass on the island (approximately 50 ha) and supported a seagrass (above-ground) biomass averaging 1060 g m-2 (wet weight). The dugongs were shy, making observations difficult. They were observed to graze at the study sites once per day, usually starting in the late afternoon or at night. Animals usually stayed on the seaward side of the spur-and-groove sections of the reefs. Short seagrasses such as Halophila ovalis, Halodule uninervis, Cymodocea rotundata, C. serrulata, Syringodium isoetifolium and Thalassia hemprichii showed more evidence of being grazed than the taller Enhalus acoroides. By direct observations of the area grazed by a single dugong, an average consumption rate of 30.5 kg (wet weight) of seagrass (above ground only) per day was estimated. The methodology developed in this study may be used to identify reserve areas for the protection of dugong habitats in the Philippines. The dugong populations of Palawan require further attention and implementation of conservation measures.

Fecal Nickel Excretion by Healthy Adults

1973 ◽  
Vol 19 (4) ◽  
pp. 429-430 ◽  
Author(s):  
Eva Horak ◽  
F William Sunderman
Keyword(s):  
Occupational Exposure ◽  
Occupational Exposures ◽  
Absorption Spectrometry ◽  
Dry Weight ◽  
Weight Basis ◽  
Fecal Excretion ◽  
Hospital Workers ◽  
Major Route ◽  
Wet Weight ◽  
Comprehensive Evaluations

Abstract Nickel was measured by atomic absorption spectrometry in three-day collections of feces from healthy hospital workers (age 22-65) who had lived for more than a year in Hartford, Connecticut. None of the 10 subjects (4/♂ , 6/♀.) had occupational exposure to nickel. Fecal nickel averaged 3.3 µg/g (wet weight); SD, ±0.8; and range, 2.1 to 4.4 µg/g. Corresponding figures on a dry-weight basis were 14.2 µg/g; SD, ±2.7; and range, 10.8 to 18.7 µg/g. The fecal excretion of nickel averaged 258 µg/day (SD, ±126; range, 80 to 540 µg/day). Fecal excretion is evidently the major route for elimination of nickel from the human body. Comprehensive evaluations of environmental or occupational exposures to nickel should also include analyses of nickel in serum, urine, and hair.

scholarly journals Hg Levels in Marine Porifera of Montecristo and Giglio Islands (Tuscan Archipelago, Italy)

2020 ◽  
Vol 10 (12) ◽  
pp. 4342
Author(s):  
Camilla Roveta ◽  
Daniela Pica ◽  
Barbara Calcinai ◽  
Federico Girolametti ◽  
Cristina Truzzi ◽  
...  
Keyword(s):  
National Park ◽  
Total Mercury ◽  
Additional Data ◽  
Dry Weight ◽  
Mercury Content ◽  
Mediterranean Species ◽  
Direct Mercury Analyzer ◽  
Mercury Analyzer ◽  
Main Input ◽  
First Time

Porifera are filter-feeding organisms known to bioaccumulate different contaminants in their tissues. The presence of mercury (Hg) has been reported in different Mediterranean species, mainly collected in the southern coast of France. In the present study, mercury concentrations in the tissue of the sponges of Montecristo and Giglio, two islands of Tuscany Archipelago National Park (TANP), are presented for the first time. Analyses of total mercury content were performed by Direct Mercury Analyzer. Statistical differences have been reported in the Hg concentrations of species collected in both islands, but they do not appear related to the anthropic impacts of the islands. Among the collected species, a high intra- and inter-variability have been recorded, with Cliona viridis showing the lowest concentration (0.0167–0.033 mg·kg−1 dry weight), and Chondrosia reniformis and Sarcotragus spinosulus the highest (0.57 ± 0.15 and 0.64 ± 0.01 mg·kg−1 dry weight, respectively). The variability of Hg measured did not allow us to identify sponges as bioindicators of toxic elements. Anyway, these results improve knowledge on the ecosystem of the TANP, underlining the species-specificity of metal concentrations for Porifera, and providing additional data to address the main input of the Marine Strategy guidelines to protect coasts, seas and oceans.

Sign in / Sign up

Export Citation Format

Share Document