Toxicity risks associated with heavy metals to fish species in the Transboundary River - Linked Ramsar Conservation Site of Tanguar Haor, Bangladesh.
Ecotoxicol Environ Saf
; 269: 115736, 2024 Jan 01.
Article
in En
| MEDLINE
| ID: mdl-38039850
ABSTRACT
The presence of trace metals in aquatic ecosystems can have detrimental effects on fish survival. The Tanguar haor, a Ramsar conservation wetland, receives sediment and water from multiple transboundary rivers. However, there have been limited studies on the metal concentrations in fish species in this sediment-rich wetland. This study aimed to analyze the concentrations of iron (Fe), manganese (Mn), chromium (Cr), copper (Cu), zinc (Zn), cadmium (Cd), and lead (Pb) in water, sediment, and fish tissues. Higher concentrations of Cd and Pb were found in the water and sediment. All these metals were detected in eight fish species, including benthic and pelagic species. Among them, Systomus sarana, a pelagic fish that also consumes benthic organisms, exhibited a higher metal pollution index than other fish, particularly benthic species. The release of higher metal concentrations from sediment into the water has the potential to impact the accumulation of metals in fish. SYNOPSIS This study on metal concentrations in fish species will aid policymaking on ecotoxicology research for transboundary river-connected wetlands.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Water Pollutants, Chemical
/
Cyprinidae
/
Metals, Heavy
Limits:
Animals
Country/Region as subject:
Asia
Language:
En
Journal:
Ecotoxicol Environ Saf
Year:
2024
Type:
Article
Affiliation country:
Bangladesh