Janz, David

Professor

David Janz

Department of Veterinary Biomedical Sciences
Western College of Veterinary Medicine
52 Campus Drive
Saskatoon, Saskatchewan, Canada
S7N 5B4

Phone: 306-966-7434

Email: david.janz@usask.ca


Academic Degrees

B.Sc. (Simon Fraser), M.Sc. (Trent), Ph.D. (British Columbia)


Current Teaching

  • TOX 300.3  General Principles of Toxicology
  • TOX 412.3  Toxicology of Industrial Pollutants
  • TOX 842.3  Biochemical Toxicology
  • VBMS 333.5 Veterinary Pharmacology  

Current and Recent Research Projects

  • Development of techniques to determine long term stress in wildlife
  • Endogenous and exogenous factors influencing gonadal development in fish
  • Aquatic ecotoxicology of selenium in native fish species
  • Noninvasive approaches to evaluate effects of environmental stressors

Publications

Pettem CM, Briens JM, Janz DM, Weber LP, (2018). Cardiometabolic response of juvenile rainbow trout exposed to dietary selenomethionine. Aquatic Toxicology, 198: 175-189.

Cattet M, Stenhouse GB, Boulanger J, Janz DM, Kapronczai L, Swenson JE, Zedrosser A, (2018). Can concentrations of steroid hormones in brown bear hair reveal age class? Conservation Physiology 6: 10.1093/conphys/coy001.

Pettem CM, Weber LP, *Janz DM, (2017). Cardiac and metabolic effects of dietary selenomethionine exposure in adult zebrafish. Toxicological Sciences, 159: 449-460.

Demuth BS, Ferrari MCO, Weber LP, Janz DM, Chivers DP, (2017). Exposure to a contextually neutral stressor potentiates fear conditioning in juvenile rainbow trout, Oncorhynchus mykiss. Hormones and Behavior, 94: 124-134.

Kroshko T, Kapronczai L, Cattet M, Macbeth BJ, Stenhouse GB, Obbard ME, *Janz DM, (2017). Comparison of methanol and isopropanol as wash solvents for determination of hair cortisol concentration in grizzly bears and polar bears. MethodsX, 4: 68-75.

Cattet M, Stenhouse GB, Janz DM, Kapronczai L, Erlenbach JA, Jansen HT, Nelson OL, Robbins CT, Boulanger J, (2017). The quantification of reproductive hormones in the hair of captive adult brown bears and their application as indicators of sex and reproductive state. Conservation Physiology, 5: doi:10.1093/conphys/cox032.

Sergiel A, Hobson KA, Janz DM, Cattet M, Selva N, Kapronczai L, Gryba C, Zedrosser A, (2017). Compatibility of preparatory procedures for the analysis of cortisol concentrations and stable isotope (d13C, d15N) ratios: A test on brown bear hair. Conservation Physiology, 5: doi:10.1093/conphys/cox021.

Duran MC, Janz DM, Waldner CL, Campbell JR, Marques FJ, (2017). Hair cortisol concentration as a stress biomarker in horses: Associations with body location and surgical castration. Journal of Equine Veterinary Science, 55: 27-33.

Creutzinger KJ, Stookey J, Marfleet T, Campbell JR, Janz DM, Marques FJ, Seddon Y, (2017). An investigation of hair cortisol as a measure of long-term stress in beef cattle: Results from a castration study. Canadian Journal of Animal Science, 97: 499-509.

Massé AJ, Muscatello JR, Hogan NS, *Janz DM, (2017). Tissue-specific selenium accumulation and toxicity in adult female Xenopus laevis chronically exposed to elevated dietary selenomethionine. Environmental Toxicology and Chemistry, 36: 1047-1055.

Massé AJ, Muscatello JR, *Janz DM, (2016). Effects of elevated in ovo selenium exposure on late stage development of Xenopus laevis tadpoles. Bulletin of Environmental Contamination and Toxicology, 97: 463-468.

Thomas JK, *Janz DM, (2016). Embryo microinjection of selenomethionine reduces hatchability and modifies oxidant responsive gene expression in zebrafish. Scientific Reports, 6: doi:10.1038/srep26520.

Carlson RI, Cattet MRL, Sarauer BL, Nielsen SE, Boulanger J, Stenhouse GB, *Janz DM, (2016). Development and application of an antibody-based protein microarray to assess physiological stress in grizzly bears (Ursus arctos). Conservation Physiology, 4: doi:10.1093/conphys/cow001.

Mislan P, Derocher AE, St. Louis VL, Richardson E, Lunn NJ, Janz DM, (2016). Assessing stress in Western Hudson Bay polar bears using hair cortisol as a biomarker. Ecological Indicators, 71: 47-54.

Green DJ, Duffy M, Janz DM, McCullum K, Carrière G, Jardine TD, (2016). Historical and contemporary patterns of mercury in a hydroelectric reservoir and downstream fishery: Concentration decline in water and fishes. Archives of Environmental Contamination and Toxicology, 71: 157-170.

Raine JC, Lallemand L, Pettem CM, Janz DM, (2016). Effects of chronic dietary selenomethionine exposure on the visual system of adult and F1 generation zebrafish (Danio rerio). Bulletin of Environmental Contamination and Toxicology, 97: 331-336.

Painter KJ, Janz DM, Jardine TD, (2016). Bioaccumulation of mercury in invertebrate food webs of Canadian Rocky Mountain streams. Freshwater Science, 35, 1248-1262.

Thomas JK, *Janz DM, (2015). Developmental and persistent toxicities of maternally deposited selenomethionine in zebrafish (Danio rerio). Environmental Science and Technology 49: 10182-10189.

Massé AJ, Muscatello JR, *Janz DM, (2015). Dose-dependent early life stage toxicities in Xenopus laevis exposed in ovo to selenium. Environmental Science and Technology 49: 13658-13666.

Choudhury S, Thomas J, Sylvain N, Ponomarenko O, Gordon R, Heald S, Janz DM, Krone P, Coulthard I, George G, Pickering I, (2015). Selenium preferentially accumulates in the eye lens following embryonic exposure: A confocal X-ray fluorescence imaging study. Environmental Science and Technology, 49: 2255 - 2261.

Bechshoft T, Derocher A, Richardson E, Mislan P, Lunn N, Sonne C, Dietz R, Janz DM, St. Louis VS, (2015). Mercury and cortisol in Western Hudson Bay polar bear hair. Ecotoxicology, 24: 1315-1321.

Bourbonnais ML, Nelson TA, Cattet MRL, Darimont CT, Stenhouse GB, Janz DM, (2014). Environmental factors and habitat use influence body condition of individuals in a species at risk, the grizzly bear. Conservation Physiology, 2, doi:10.1093/conphys/cou043.

*Janz DM, Liber K, Pickering IJ, Wiramanaden CI, Weech SA, Gallego-Gallegos M, Driessnack MK, Franz ED, Goertzen MM, Phibbs J, others, (2014). Integrative assessment of selenium speciation, biogeochemistry, and distribution in a northern coldwater ecosystem. Integrated Environmental Assessment and Management, 10: 543-554.

Gerger CJ, Thomas JK, Janz DM, Weber LP, (2014). Acute effects of β-naphthoflavone on cardiorespiratory function and metabolism in adult zebrafish (Danio rerio). Fish Physiology and Biochemistry. 41: 289 - 298.

Cattet MRL, Macbeth BJ, Janz DM, Zedrosser A, Swenson JE, Dumond M, Stenhouse GB, (2014). Quantifying long-term stress in brown bears with the hair cortisol concentration: A biomarker that may be confounded by rapid changes in response to capture and handling. Conservation Physiology, 2: doi:10.1093/conphys/cou026.

McPhee DL, *Janz DM, (2014). Dietary selenomethionine exposure alters swimming performance, metabolic capacity and energy homeostasis in juvenile fathead minnow. Aquatic Toxicology, 155: 91 - 100.

Thomas JK, *Janz DM, (2014). In ovo exposure to selenomethionine via maternal transfer increases developmental toxicities and impairs swim performance in F1 generation zebrafish (Danio rerio). Aquatic Toxicology, 152: 20 - 29.

Franz ED, Wiramanaden CI, Gallego-Gallegos M, Tse JJ, Phibbs J, Janz DM, Pickering IJ, Liber K, (2013). An in situ assessment of selenium bioaccumulation from water-, sediment-, and dietary-exposure pathways using caged Chironomus dilutus larvae. Environmental Toxicology and Chemistry, 32: 2836-2848.

Massé AJ, Thomas JK, *Janz DM, (2013). Reduced swim performance and aerobic capacity in adult zebrafish exposed to waterborne selenite. Comparative Biochemistry and Physiology Part C: Toxicology and Pharmacology, 157: 266 - 271.

Thomas JK, Wiseman S, Giesy JP, *Janz DM, (2013). Effects of chronic selenomethionine exposure on repeat swimming performance, aerobic metabolism and methionine catabolism in adult zebrafish (Danio rerio). Aquatic Toxicology, 130-131: 112-122.

Macbeth BJ, Cattet MRL, Obbard ME, Middel K, *Janz DM, (2013). Evaluation of hair cortisol concentration as a biomarker of long-term stress in free-ranging polar bears. Wildlife Society Bulletin, 36: 747-758.

*Janz DM, (2012). Selenium. In Farrell A, Brauner C (Ed.), Fish Physiology (pp. 327 - 374). San Diego: Elsevier

*Janz DM, DeForest D, Brooks M, Chapman P, Gilron G, Hoff D, Hopkins W, McIntyre D, Mebane C, Palace V, Skorupa J, Wayland M, (2010). Selenium toxicity to aquatic organisms. In Chapman P, Adams W, Brooks M, Delos C, Luoma S, Maher W, Ohlendorf H, Presser T, Shaw D (Ed.), Ecological Assessment of Selenium in the Aquatic Environment (pp. 141 - 231). Boca Raton: CRC Press

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