Eman Zahran

Prof. Dr. Eman Zahran

Aquatic Animal Medicine, Mansoura University, Al Manşūrah, Ad Daqahlīyah, Egypt
orcid

Research Focus & Metrics

Academic Career Length

17Years (2010-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 April 2018 in Aquatic Toxicology
Verified
Journal Article
Closed access
Eman ZahranEman Zahran
Eman Zahran
EREngy Risha
Engy Risha
WAWalaa Awadin
Walaa Awadin
DPDušan Palić
Dušan Palić

1 September 2018 in Fish & Shellfish Immunology
Verified
Journal Article
Closed access
Eman ZahranEman Zahran
Eman Zahran
EEEman A. Abd El-Gawad
Eman A. Abd El-Gawad
EREngy Risha
Engy Risha


31 May 2025 in Aquaculture International
Verified
Journal Article
Open access
PDF file
Eman ZahranEman Zahran
Eman Zahran
AMAl-Zahraa Mamdouh
Al-Zahraa Mamdouh
SESamia Elbahnaswy
Samia Elbahnaswy
MEMai M. A. El-Son
Mai M. A. El-Son
EREngy Risha
Engy Risha
MAMahmoud Abdelhamid
Mahmoud Abdelhamid
Heavy metal contamination of aquatic environments threatens fish health and ecosystems. This review examines the bioaccumulation patterns, toxicity mechanisms, effects of oxidative stress, and histopathological changes induced by heavy metals in various fish species across different habitats. Important heavy metals, including mercury, cadmium, lead, arsenic, chromium, copper, and iron, are discussed. These metals can bioaccumulate in fish tissues via waterborne and dietary exposure, and bioaccumulation depends on several factors such as metal type, fish species, and exposure conditions. The generation of reactive oxygen species is one of the main reasons why heavy metals exert their toxic effects; depletion of antioxidants and damage to cellular components lead to oxidative stress. Oxidative stress is induced by alterations in antioxidant enzymes and increases in lipid peroxidation levels. Histopathological changes were recorded in target organs, such as the gills, liver, and kidneys. We emphasize the existing knowledge gap, which requires further research to provide full insights into fish heavy metal toxicity, with potential implications for human consumers. Understanding the toxicity mechanisms of heavy metals in fish is the key to developing biomarkers and mitigation strategies to protect aquatic ecosystems.

1 December 2014 in Veterinary Immunology and Immunopathology
Verified
Journal Article
Closed access
MEMohamed El-Boshy
Mohamed El-Boshy
AEAhmed El-Ashram
Ahmed El-Ashram
EREngy Risha
Engy Risha
FAFatma Abdelhamid
Fatma Abdelhamid
Eman ZahranEman Zahran
Eman Zahran
AGAli Gab-Alla
Ali Gab-Alla