Heavy Lmetals Accumulation and Macronutrients in the Livers of Some Fish Species of Bardawil Lagoon and Their Histological Changes

The EU Interreg Project “GEREMIA” on waste management for the improvement of port waters: results on monitoring the health status of fish as bioindicator

“…Lead concentrations were higher in samples from the port than from the fishpond, for the liver (p value: 5.608e − 13), gills (p value: 1.571e − 13), and muscle (p value: 3.667e − 09) (Table 2). In addition, Pb is assessed to alter normal histology of tissues (Authman et al 2015;Gad El-Hak et al 2021;Yacoub and Abdel Satar 2003), and, in the present study, a positive correlation of Pb content was found with the presence of necrosis foci in the liver (r: 0.55, Spearman's coefficient) and SL epithelial lifting in gills (r: 0.50, Spearman's coefficient). Furthermore, concentrations of Pb in samples from the port of Genoa were substantial when compared to other studies on Mugilidae fish, where a higher content of Pb is reported in gills, reaching a maximum of 3 mg/kg, while Pb concentrations in the liver and muscle usually do not exceed the values of 1 mg/kg and 0.3 mg/kg, respectively (Bat et al 2018;Engin 2015;Licata et al 2003;Rajeshkumar et al 2015;Salem and Ayadi 2016;Stancheva et al 2013;Usero et al 2003).…”

“…Manganese is reported to be a constituent for bones (Yacoub and Abdel Satar 2003), and this could explain the higher content in gills that in the other tissues found in the present study. Copper resulted to reach much higher levels in liver than in gills and muscle, being an essential component of enzymes and thus crucial to metabolic functions of liver (Salem and Ayadi 2016), and its mean concentrations were significantly higher, according to the Mann-Whitney test, in samples from the port than from the fishpond in liver (p value: 5.639e − 05), gills (p value: 3.266e − 08), and muscle (p value: 0.01891) (Table 2).…”

Effect of 17 a-Methyl Testosterone on Haematology and Histology of Liver and Heart of Oreochromis andersonii (Castelnau, 1861)

“…We speculate that the presence of brown granules was caused by haemorrhage due to the inflammation of tissue, and cannot be attributed to the MT oral administration. This is because the rapid and continued destruction of RBC and breakdown of haemoglobin may have converted them into hemosiderin [41]. All the samples exhibited extra-hepatic pancreas a classical content of glycogen, which fills most of the cytoplasm.…”

Histopathology investigation on the Vardar chub (Squalius vardarensis) populations captured from the rivers impacted by mining activities

“…Although metal accumulation depends on fish species, as well as on metal itself, it is generally higher in the liver, as main detoxification organ, compared to other fish organs, which makes fish liver widely used target organ for monitoring of long term metal pollution of water ecosystems (Arellano et al, 1999;Yacoub and Abdel Satar, 2003;Filipović Marijić and Raspor, 2007;Koca et al, 2008;Podrug et al, 2009;Jovanović et al, 2011;Dragun et al, 2012Dragun et al, , 2015.…”

“…Consequently, histology presents a successful tool, which is sensitive and selective for monitoring the sub-lethal effects of metals on the aquatic biota (Arellano et al, 1999). However, different pathologies and abnormalities on hepatic tissue caused by metals were studied only sporadically (Arellano et al,1999;Yacoub andAbdel Satar, 2003, Olojo et al, 2005;Kraemer et al, 2005;Koca et al, 2005Koca et al, , 2008Giari et al, 2008;Yildiz et al, 2010;Gurcu et al, 2010;Roberts and Rodger, 2012;Hadi and Alwan, 2012;Javed and Usmani, 2013).…”