Impact of Certain Heavy Metals on the Gill and Liver of the Nile Tilapia (Oreochromis Niloticus)

Gaber, Hanan S.

doi:10.21608/ejabf.2007.1936

Cited by 9 publications

(6 citation statements)

References 42 publications

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“…The results obtained in pure water without copper sulphate, suggest to us that there is an initial recovery process, which is better expressed in the lower concentration. Our study, similar to Gaber [34], shows that this process is slow and long-lasting.…”

supporting

confidence: 88%

Gill tissue recovery after copper exposure in Carassius gibelio (Pisces: Cyprinidae)

2013

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We investigated the influence of copper in a long-time treatment with concentrations of 0.05 mg L−1 and 0.1 mg L−1 to track the histopathological changes in gills of Carassius gibelio, and to find at what extent they will recover after the effect of the copper concentrations stops. Treatment with copper lasted 21 days and the recovery time was of the same duration. The results of histological examination showed degenerative changes (resulting in thinner secondary lamellae and filamentary epithelium), and hyperplastic and hypertrophic changes (proliferation, vasodilatation, aneurysms, epithelial interstitial edema, and fusion) in gills under the influence of two concentrations. The degenerative changes have higher prevalence at low concentrations, while hyperplastic and hypertrophic ones — at high concentrations. After the period of recovery they remained the same, but the extent of expression on the surface of gill filaments changed. The long-time copper intoxication in low concentrations of copper affects gill structure, causing severe changes whose recovery is a slow process that requires a longer period of time.

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confidence: 88%

Gill tissue recovery after copper exposure in Carassius gibelio (Pisces: Cyprinidae)

2013

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“…Therefore, the concentration of metals in gills reflects their concentration in water where the fish live [6][7][8].…”

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confidence: 99%

Comparison of Heavy Metal Levels in Muscle and Gills of Four Benthic Fish Species from the Northeastern Mediterranean Sea

Olgunoğlu¹,

Artar²,

Olgunoğlu³

2015

Pol. J. Environ. Stud.

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Heavy metals are of particular concern due to their toxicity and bioaccumulation ability in aquatic ecosystems and aquatic organisms. In general, they are not biodegradable and have long biological halflives. According to the World Health Organization (WHO), heavy metals must be controlled in food sources in order to assure public safety [1]. Heavy metals are taken up and accumulated by aquatic organisms both from the surrounding medium and via food sources (deep-sea carnivorous fish in particular accumulate metals in their muscles via the food chain). The extent of heavy metal accumulation is affected by external (dissolved metals, physicochemistry, dissolved oxygen, interactions between metals, sediment, food, seasonal effects, geographical differences) and internal (individual variability, body size and development stage, sex, breeding condition, brooding, moulting and growth, behaviour) factors [2,3].Many species of marine benthic fish are largely being used to assess the quality of aquatic environments because they could concentrate large amounts of some metals in different tissues such as muscle and gills [4,5]. The gills are considered the main site of entry for the dissolved metals. They are sensitive to any change of water components and serve as a good indicator of water quality since gill filaments and lamellae provide a very large surface area for direct and continuous contact with contaminants Pol. J. Environ. Stud. Vol. 24, No. 4 (2015), 1743-1748 AbstractIn the present study, the concentration of cadmium (Cd), lead (Pb), copper (Cu), zinc (Zn), and iron (Fe) in the gill and muscle tissues of four benthic fish species (Merluccius merluccius, Lophius budegassa, Helicolenus dactylopterus, and Chlorophthalmus agassizi) from the northeastern Mediterranean Sea in Turkey were investigated. From the obtained results, the heavy metal concentrations in muscle were lowest and highest in the gills for each species. Cd was not detected in any tissues of the species. The order of heavy metal concentrations were found as Zn>Fe>Cu>Pb=Cd in muscle tissue samples for four selected fish species (p<0.05). In the muscle tissue, the highest concentration of Zn (5.875 μg/g) was found in Lophius budegassa. The concentrations of heavy metals in gills of four selected fish species were Fe>Zn>Cu>Pb>Cd (p<0.05). In the gills, the highest concentration of Fe (73.730 μg/g) was also found in Lophius budegassa. The comparison of our results with previous studies showed that the metal levels of tissues are variable in organisms caught from the same area. In our study, the concentrations of Cd, Pb, Cu, Zn, and Fe in the muscle tissue are less than the permissible limits set for heavy metals by food regulations.

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“…The results regarding different fish species Se requirements are not consistent some reported higher [4,23], and others reported lower [24]. This difference might be due to the several incomputable variations in fish species, environmental differences [25], biochemical properties of different Se sources [26], and mathematical models used to find the Se requirement [27].…”

Section: Discussionmentioning

confidence: 95%

Evaluation of dietary selenium methionine levels and their effects on growth performance, antioxidant status, and meat quality of intensively reared juvenile Hypophthalmichthys molitrix

et al. 2022

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The objective of this study was to optimize the organic selenium (Se) requirements of intensively reared silver carp (Hypophthalmichthys molitrix). A total of n = 300 juveniles silver carp 11.40±0.52 cm long, and average weighing 25.28±0.18 grams were randomly assigned to 15 aquaria (20 fish/100L aquaria) and subjected to five different dietary Se levels in a completely randomized design. The diets were pelleted supplemented with exogenous Se

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Impact of Certain Heavy Metals on the Gill and Liver of the Nile Tilapia (Oreochromis Niloticus)

Cited by 9 publications

References 42 publications

Gill tissue recovery after copper exposure in Carassius gibelio (Pisces: Cyprinidae)

Gill tissue recovery after copper exposure in Carassius gibelio (Pisces: Cyprinidae)

Comparison of Heavy Metal Levels in Muscle and Gills of Four Benthic Fish Species from the Northeastern Mediterranean Sea

Evaluation of dietary selenium methionine levels and their effects on growth performance, antioxidant status, and meat quality of intensively reared juvenile Hypophthalmichthys molitrix

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