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Nutritive metal uptake in teleost fish.
Nicolas R Bury1, Paul A Walker, Chris N Glover
1King's College London, School of Health and Life Sciences, Franklin-Wilkins Building, 150 Stamford Street, London, SE1 9NN, UK. nic.bury@kcl.ac.uk
The Journal of Experimental Biology
|November 29, 2002
Summary
This review explores how fish absorb essential metals like iron, copper, and zinc from water and diet. It details uptake pathways in gills and intestines, crucial for maintaining metal balance and preventing toxicity.
Area of Science:
- Environmental Biology
- Aquatic Toxicology
- Comparative Physiology
Background:
- Transition metals are vital for biological functions but toxic in excess.
- Organisms require strict metal homeostasis, coordinating uptake and excretion.
- Aquatic organisms can absorb essential metals from water, in addition to diet.
Purpose of the Study:
- To review uptake pathways for iron, copper, and zinc in teleost fish.
- To assess physiological, pharmacological, and molecular evidence for metal acquisition.
- To understand how fish maintain essential metal balance from water and diet.
Main Methods:
- Literature review of physiological studies.
- Analysis of pharmacological data on metal transport.
- Examination of recent molecular biology findings on metal uptake mechanisms.
Main Results:
- Identified key roles of gills and intestine in metal absorption.
- Outlined specific molecular and physiological pathways for iron, copper, and zinc uptake.
- Highlighted the importance of waterborne metal sources for fish.
Conclusions:
- Teleost fish possess sophisticated mechanisms for acquiring essential transition metals.
- Understanding these pathways is critical for fish health and metal homeostasis.
- Further research into molecular mechanisms can inform aquatic ecosystem management.