Department of Biology

Som Niyogi, PhD

Assistant Professor
Department of Biology 
Associate Member of Toxicology Program
112 Science Place
University of Saskatchewan
Saskatoon, SK
S7N 5E2
Tel: (306) 966-4453
Fax: (306) 966-4461


BIOL 224.3 - Animal Body Systems

TOX 301.3 - Environmental Toxicology

BIOL 898.3 -  Special Topics (Physiology and Toxicology of Aquatic Animals)


The overall objective of my research program is to investigate the physiological processes by which aquatic animals absorb and handle essential and non-essential trace metals. Anthropogenic activity has led to elevated concentrations of trace metals in many natural waterbodies with adverse consequences for aquatic life. A comprehensive knowledge of the fundamental mechanisms involved in metal uptake and toxicity, and their interplay with other environmental factors is required to develop reliable models/approaches for risk assessment of metals in the aquatic ecosystems. In this context, my research is focused on understanding the complex relationships among water and food quality, metal speciation, uptake, accumulation, and toxicity in metal-impacted aquatic animals. While the starting point is always basic mechanistic physiology, my research uses tools of organismic physiology, biochemistry, cell biology, geochemistry and modeling to address these issues.


Sougat Misra (Ph.D. Student in Biology)

Raymond Kwong (Ph.D. Student in Toxicology)

Jacob Ouellet (Ph.D. Student in Biology; Co-supervised with Dr. Monique
Dubé, Associate Professor, School of Environment and Sustainability)

Lisa Ramilo (M.Sc. Student in Toxicology; Co-supervised with Dr. Monique
DubéAssociate Professor, School of Environment and Sustainability)

Aditya Manek (M.Sc. Student in Biology; Co-supervised with Dr. Doug Chivers, Professor, Biology)


Kwong R and Niyogi S. 2008. An in vitro examination of intestinal iron absorption in a freshwater teleost, rainbow trout (Oncorhynchus mykiss). Journal of Comparative Physiology 178B: 963-975. pdf

Niyogi S. Kent R and Wood CM. 2008. Effects of water chemistry variables on gill binding and acute toxicity of cadmium in rainbow trout (Oncorhynchus mykiss): A biotic ligand model (BLM) approach. Comparative Biochemistry and Physiology 148C: 305-314. pdf

Niyogi S, Pyle GG and Wood CM. 2007. Branchial versus intestinal zinc uptake in wild yellow perch (Perca flavescens) from reference and metal-contaminated aquatic ecosystems. Canadian Journal of Fisheries & Aquatic Sciences 64: 1605-1613. pdf 

Niyogi S, Kamunde C and Wood CM. 2006. Food Selection, growth and physiology in relation to dietary sodium chloride content in rainbow trout (Oncorhynchus mykiss) under chronic waterborne Cu exposure. Aquatic Toxicology 77: 210-221. pdf 

Niyogi S and Wood CM. 2004. The Biotic Ligand Model, a flexible tool for developing site-specific water quality guidelines for metals. Environmental Science & Technology 38: 6177-6192. pdf 

Niyogi S and Wood CM. 2003. Effect of chronic waterborne and dietary metal exposures on gill metal-binding characteristics in fish: implications for the Biotic Ligand Model (BLM). Human and Ecological Risk Assessment 9: 813-846.  pdf

Last Modified: