Heavy Metal Concentrations in Fish Tissues from the Northeast Mediterranean Sea

Background. The potential toxicity of metals in water may have detrimental effects on the biochemical processes of aquatic organisms, especially fish, which serve as a source of protein in the protein-deficient Nigerian diet. Objective. The present study aimed to determine the concentration of heavy metals in African catfish (C. gariepinus) and investigate the health risk associated with heavy metals in fish. Methods. Heavy metal concentrations in the water samples were determined using atomic absorption spectrophotometry (AAS) and particle induced x-ray emission spectroscopy (PIXE) for sediment and fish tissues/organ samples. Results. Mean nickel (Ni) concentrations differed significantly (p<0.05) by sample type in both the dry and rainy seasons. Similarly, during the rainy season, mean lead (Pb) concentrations in all of the samples from Osogbo differed significantly (p<0.05) by type, with the highest concentration in fish muscle (10.11±1.21 μg/kg) and the lowest Pb concentration in pond water (1.72±0.05 μg/L). Mean chromium (Cr) concentrations of samples from the Ewuru/Rara stream in Yakoyo also differed significantly (p<0.05) by type, with the highest concentration in fish muscle (113.10.±10.07 μg/kg) and the lowest concentration in pond water (3.31±0.22 μg/L). Discussion. Heavy metal concentrations in pond and stream sediment samples revealed transport and deposition processes where trace metals are deposited and incorporated into sediment after entering the aquatic system. Iron (Fe) had the highest concentration levels ranging from (196.21 μg/g – 698.65 μg/g) in the three locations investigated, while Pb levels were the lowest, ranging from (9.05 μg/g – 75.30 μg/g). Conclusions. In general, the concentrations of Cr, copper (Cu) and manganese (Mn) were below standard guidelines, while the concentrations of nickel (Ni) and lead (Pb) were fairly higher than the tolerable limits for water pollution standards.

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Assessment of Ectoparasites and Heavy Metal Concentrations in Hemichromis Fasciatus, Liza Falcipinnis and Sarotherodon Galileus

Journal La Lifesci ◽

10.37899/journallalifesci.v1i5.243 ◽

2020 ◽

Vol 1 (5) ◽

pp. 12-21

Author(s):

Ikiriko N ◽

Robert B ◽

Amuzie C C

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Fish Species ◽

Fish Tissues ◽

Metal Concentrations ◽

Heavy Metal Concentrations ◽

Permissible Limits ◽

Standard Procedures ◽

Cr Concentration ◽

Rivers State

Ectoparasites and heavy metal pollution pose health risks to both wild and aquaculture fish species. Here, we examine the ectoparasites of fish species (Hemichromis fasciatus, Liza falcipinnis and Sarotherodon galileus) from Abalama and Ilelema locations of the Buguma Creek, Rivers State, Nigeria, over a period of six months (February to July, 2020). Fish tissues (muscles, gills and gut) were also examined for heavy metals (Cr, Cd and Pb). Parasitological investigations were done following standard procedures, as well as the heavy metal analysis which was done using atomic absorption spectrophotometer after dry ashing-acid digestion. Two ectoparasites were isolated: Zeylanicobdella arugamensis from L. falcipinnis at both locations and Cymothoa exigua from H. fasciatus at Ilelema. In surface water, Cr concentration was <0.003µg/l throughout the study period; Cd concentrations ranged between 0.06µg/l and 0.09µg/l at both locations, while Pb values were 0.29µg/l - 0.64µg/l at Abalama, and 0.56µg/l – 0.71µg/l at Ilelema. These values were within international acceptable standards. In fish tissues, however, Cr values were <0.003µg/g in both locations throughout the study period. At Abalama, Cd ranged between 7.18µg/g and 8.15µg/g, and Pb between 72.83µg/g and 92.23µg/g. At Ilelema, Cd concentrations were between 7.56µg/g and 8.67µg/g while Pb values ranged between 78.32µg/g and 92.88µg/g. Differences in heavy metal concentrations in both water and fish tissues between both locations were not statistically significant (p>0.05). All fish species and tissues bioaccumulated appreciable concentrations of the heavy metals. Cr in fish tissues was within permissible limits, but all Cd and Pb values exceeded international permissible limits.

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Analysis of Heavy Metal Concentrations (Cd, Pb, Cu, Zn, Fe) in Giant Red Shrimp (Aristaeomorpha foliacea Risso 1827) from the Mediterranean Sea

Challenging Issues on Environment and Earth Science Vol. 6 ◽

10.9734/bpi/ciees/v6/1735c ◽

2021 ◽

pp. 79-88

Author(s):

Mine Perçin Olgunoglu ◽

Ilkan Ali Olgunoglu ◽

Yusuf Kenan Bayhan

Keyword(s):

Heavy Metal ◽

Mediterranean Sea ◽

Metal Concentrations ◽

Heavy Metal Concentrations ◽

Aristaeomorpha Foliacea ◽

The Mediterranean

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Heavy Metal Concentrations (Cd, Pb, Cu, Zn, Fe) in Giant Red Shrimp (Aristaeomorpha foliacea Risso 1827) from the Mediterranean Sea

Polish Journal of Environmental Studies ◽

10.15244/pjoes/33201 ◽

2015 ◽

Vol 24 ◽

Cited By ~ 6

Author(s):

Mine Olgunoglu ◽

İlkan Olgunoglu ◽

Yusuf Bayhan

Keyword(s):

Heavy Metal ◽

Mediterranean Sea ◽

Metal Concentrations ◽

Heavy Metal Concentrations ◽

Aristaeomorpha Foliacea ◽

The Mediterranean

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Metal concentrations in tissues of the Black Sea fish Mugil auratus from Sinop-Icliman, Turkey

Human & Experimental Toxicology ◽

10.1191/0960327103ht323oa ◽

2003 ◽

Vol 22 (2) ◽

pp. 85-87 ◽

Cited By ~ 25

Author(s):

Ayhan Filazi ◽

Ruhtan Baskaya ◽

Cavit Kum ◽

Sahver Ege Hismiogullari

Keyword(s):

Heavy Metal ◽

Black Sea ◽

Liver Tissue ◽

Lead Level ◽

Dry Weight ◽

The Black Sea ◽

Fish Tissues ◽

Metal Concentrations ◽

Heavy Metal Concentrations ◽

Muscle Tissues

Levels of five heavy metals [copper (Cu), lead (Pb), cadmium (Cd), chromium (Cr) and nickel (Ni)] were evaluated in liver and muscle tissues of fish (Mugil auratus) collected from the Black Sea at Sinop-Icliman, Turkey. Sampling and analysis methods are described. Variations of heavy metal concentrations with seasons are discussed. Cr and Ni concentrations were below the limits of detection (<0.05 and 0.1 ug/g dry weight) in all tissues and seasons. Cu, Pb and Cd were detected within these limits, as mg/kg dry weight, in liver tissue: 0.49-1.30, 0.60-1.21 and 0.15-0.50, and in muscle tissue: 0.30-1.00, 0.57-1.12 and 0.10-0.40, respectively. Cu, Pb and Cd concentrations in these tissues were elevated and the highest heavy metal concentrations were found in the liver. While Cu, Pb and Cd concentrations were highest in fish tissues collected in August 2000, the lowest concentrations of these metals were observed in fish tissues collected in May 2000. Pb had the highest level observed in fish tissues. According to the Turkish Food Codex Regulation's residue limits, the cadmium level determined in fish tissues was high (0.1 mg/g) and the lead level, especially in liver tissue, was high in August (1 mg/ g), while other metals (Cu, Cr and Ni) were within the maximum residue limits.

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