Dr Rachael Gray

PhD, BVSc (Hons), Grad Cert Ed Stud (Higher Education)
Senior Lecturer Veterinary Pathology  

B14 - Mcmaster Building
The University of Sydney

Telephone +61 2 9351 2643

Website The University of Sydney
Curriculum vitae Curriculum vitae

Biographical details

I completed my Bachelor of Veterinary Science (BVSc) at The University of Sydney in 1996 and worked in small animal veterinary practice for three years. I then undertook a PhD through The University of Sydney investigating aspects of health in leopard and Weddell seals in Eastern Antarctica. After the completion of my PhD in 2005, I commenced as a lecturer in Veterinary Anatomy at The University of Sydney. In 2010, in an effort to better align my teaching and research, I moved to teaching Veterinary Clinical Pathology. I completed a Graduate Certificate in Educational Studies (Higher Education) in 2006 at The University of Sydney.

I currently teach across multiple units in the Doctor of Veterinary Medicine (DVM) and supervise a number of PhD, Master's and Honours students.

My main areas of research are health investigations of native animals with a focus on pinnipeds as well as eastern grey kangaroos and Little penguins. My research regularly takes me to many seal and sea lion colonies across Australia.

Research interests

My main areas of research interest are health and disease investigations of seals and sea lions. Current investigations include:

  • Hookworm disease in Australian sea lions
  • Treatment trials for hookworm disease in Australian sea lions
  • Toxicant investigations in pinnipeds including heavy metals and persistent organic pollutants
  • Comparative health studies in pinnipeds: Australian sea lions, NZ sea lions, Australian and long-nosed fur seals
  • Acute phase protein investigations (pinnipeds, domestic and captive felids)
  • E. coli prevalence and phylotyping in pinnipeds and Little penguins
  • Immunocompetence and sexual dimorphism in eastern grey kangaroos
  • Reference interval development for haematology and biochemistry (pinnipeds, domestic canines and felines)

Teaching and supervision

Teaching: various units of study across the Doctor of Veterinary Medicine (DVM) with a focus onVeterinary Pathology - anatomic pathology and Veterinary Clinical Pathology including haematology and biochemistry, protein investigations, case based approach to clinical pathology teaching, urinalysis, endocrinology

Research Supervision

Current HDR Students:

Scott Lindsay: Investigations of reduced reproductive success in Australian sea lions due to hookworm disease and Toxoplasma gondii

Sarah Michael: Health investigations of NZ sea lions on Enderby island, Auckland Islands

Shannon Taylor: Toxicant investigations (heavy metals and persistent organic pollutants) in fur seals and sea lions

Mariel Fulham: Comparative E. coli prevalence and phylotype in pinnipeds in Australian waters

Maquel Brandimarti: Immunocompetence and sexual dimorphism in eastern grey kangaroos - investigations of health status

Lucinda Barton: Osteoarthritis in captive big cats

Anne Jordan: Stability of thyroid hormones in domestic cats

Maria Ignacia Meza Cerda: ummunology in Australian sea lion pups

Honours students (2019)

Bridget Webster: E. coli diversity in pinniped pups

DVM 3 Research Supervision (2019)

Four students working on a diverse range of topics including response to anaemia in Australian sea lions, development of haematology reference intervals in Australian fur seals, toxiciant investigations in long-nosed fur seals and reference interval development in domestic canines and felines

Service

My main areas of service include participation in the Diagnostic biopsy service for Veterinary Pathology Diagnostic Service; Category A member on an Animal Ethics Committee.

Current research students

Project title Research student
Too much of a good thing? The ecoimmunology of overabundant eastern grey kangaroos (Macropus giganteus) Maquel BRANDIMARTI
�Development of immune assessment as a tool for evaluation of disease on developing Australian sea lion pups (Neophoca cinerea)� Ignacia MEZA CERDA
Anthropogenic toxicants linked to disease and morbidity in endangered pinniped populations. Shannon TAYLOR

Current projects

I have a number of current and ongoing projects which include:

  • Impact of hookworm disease in Australian and NZ pinnipeds
  • Impact of toxicants (heavy metals and persistent organic pollutants) on the health and immunocompetence of Australian pinnipeds
  • Toxoplasma gondii in Australian sea lions - impact on reproductive success?
  • E. coli and antimicrobial resistance in pinnipeds
  • Health in Little penguins
  • Immunocompetence and sexual dimorphism in eastern grey kangaroos
  • Stability of thyroid hormones in domestic cats
  • Acute phase proteins in pinnipeds and domestic felids
  • Development of laboratory reference interval development: domestic canines and felines

As of January 2019, I do not have any upcoming PhD or Master's projects available.

Associations

I am a member of the following associations:

  • Marine Mammal and Seabird Health Collaborative
  • Society of Marine Mammalogy
  • Wildlife Disease Association
  • Australian Marine Science Association
  • Australian Society of Veterinary Pathologists

I have active collaborations with researchers at Macquarie University, Massey University, Phillip Island Nature Parks, and the South Australian Research and Development Institute.

I serve as a Category A (Veterinarian) on an Animal Ethics Committee

Awards and honours

2016 Faculty of Veterinary Science Highly Commended ‘In recognition of outstanding academic achievement in the field of pinniped health and disease status’

Selected grants

2019

  • Anthropogenic Persistent Organic Pollutants and mercury linked to disease and mortality in Australian pinnipeds; Gray R, Taylor S; Ecological Society of Australia/Student Research Grant.

2018

  • Do high testosterone levels lower fitness, and make male kangaroos more vulnerable to parasites?; Brandimarti M, Herbert C, Gray R; Royal Zoological Society of New South Wales/Ethel Mary Read Research Grants.
  • Exploring the microbiome of endangered pinnipeds: the dynamics of E. coli and hookworm co-infection and its impact on pup health; Fulham M, Gray R; Ecological Society of Australia/Student Research Grant.

2016

  • Investigation and mitigation of reduced fecundity due to infectious disease in the endangered Australian sea lion, N. cinerea.; Gray R, Lindsay S, Slapeta J, Higgins D, Marcus A; Hermon Slade Foundation/Research Grants.
  • Assessing the utility of acute phase proteins alpha -1 acid glycoprotein (AGP), haptoglobulin, serum amyloid A and fibrinogen in the diagnosis of inflammatory diseases in cats; Gray R, Norris J, Sanchez-Perez A; Australian Companion Animal Health Foundation/Research Support.

2014

  • Impacts of toxicants in the marine ecosystem on the health of Australian fur seals; Gray R, Lynch M, Kirkwood R, Mondon J; The Hermon Slade Foundation/Research Grant.

2010

  • Prevalence and impact of hookworm infection on Australian sea lion populations; Gray R, Higgins D, Goldsworthy S, Canfield P; Australian Marine Mammal Centre/Australian Marine Mammal Centre Grants Scheme.

2009

  • Investigation of hookworm disease in the Australian sea lion, Neophoca cinerea; Gray R; The Faculty of Veterinary Science, University of Sydney/Postdoctoral fellow and new academic staff travel funds.

2008

  • Investigation of the health and disease status of the Australian sea lion (Neophoca cinerea); Canfield P, Gray R; Winifred Scott Foundation/Research Support.

2007

  • New Staff Research Start-up funds for 2007; Gray R; University of Sydney/Newly Appointed Staff.
  • Investigation of the health and disease status of the Australian sea lion, Neophoca cinerea; Gray R; The Faculty of Veterinary Science, University of Sydney/Start-up Research Fund.
  • Investigation of the health and disease status of the Australian sea lion, Neophoca cinerea; Gray R; University of Sydney/Early Career Researcher.

Selected publications

Download citations: PDF RTF Endnote

Book Chapters

  • Diaz, J., Fusaro, B., Vidal, V., Gonzalez-Acuna, D., Costa, E., Dewar, M., Gray, R., Power, M., Miller, G., Blyton, M., et al (2017). Macroparasites in Antarctic Penguins. In Sven Klimpel, Thomas Kuhn, Heinz Mehlhorn (Eds.), Biodiversity and Evolution of Parasitic Life in the Southern Ocean, (pp. 183-204). Cham: Springer. [More Information]
  • Gray, R., Rogers, T., Canfield, P. (2009). Health Assessment of the Leopard Seal, Hydrurga leptonyx, in Prydz Bay, Eastern Antarctica and NSW, Australia. In Knowles R. Kerry, Martin J Riddle (Eds.), Health of Antarctic Wildlife: A Challenge for Science and Policy, (pp. 167-192). Berlin: Springer. [More Information]
  • Barnes, J., Higgins, D., Gray, R. (2008). Pinnipeds. In Larry Vogelnest, Rupert Woods (Eds.), Medicine of Australian Mammals, (pp. 541-589). Collingwood, Australia: CSIRO Publishing.

Journals

  • Fulham, M., Power, M., Gray, R. (2018). Comparative ecology of Escherichia coli in endangered Australian sea lion (Neophoca cinerea) pups. Infection, Genetics and Evolution, 62, 262-269. [More Information]
  • Taylor, S., Lynch, M., Terkildsen, M., Stevenson, G., Yates, A., Piro, N., de Araujo, J., Gray, R. (2018). Utility of fur as a biomarker for persistent organic pollutants in Australian fur seals (Arctocephalus pusillus doriferus). Science of the Total Environment, 610-611, 1310-1320. [More Information]
  • March, D., Brown, D., Gray, R., Curthoys, I., Wong, C., Higgins, D. (2016). Auditory anatomy of beaked whales and other odontocetes: Potential for cochlear stimulation via a "vibroacoustic duct mechanism". Marine Mammal Science, 32(2), 552-567. [More Information]
  • Lau, Q., Chow, N., Gray, R., Gongora, J., Higgins, D. (2015). Diversity of MHC DQB and DRB Genes in the Endangered Australian Sea Lion (Neophoca cinerea). Journal of Heredity, 106(4), 395-402. [More Information]
  • Marcus, A., Higgins, D., Gray, R. (2015). Health assessment of free-ranging endangered Australian sea lion (Neophoca cinerea) pups: Effect of haematophagous parasites on haematological parameters. Comparative Biochemistry and Physiology, Part A, 184, 132-143. [More Information]
  • Marcus, A., Higgins, D., Gray, R. (2015). Ivermectin treatment of free-ranging endangered Australian sea lion (Neophoca cinerea) pups: effect on hookworm and lice infection status, haematological parameters, growth, and survival. Parasitology Research, 114, 2743-2755. [More Information]
  • Marcus, A., Higgins, D., Gray, R. (2014). Epidemiology of hookworm (Uncinaria sanguinis) infection in free-ranging Australian sea lion (Neophoca cinerea) pups. Parasitology Research, 113(9), 3341-3353. [More Information]
  • Lau, Q., Wilkin, T., Payne, E., Gray, R., Gongora, J., Higgins, D. (2014). Primers for amplifying major histocompatibility complex class II DQB and DRB exon 2 in the Australian sea lion (Neophoca cinerea). Conservation Genetics Resources, 6(4), 813-816. [More Information]
  • Marcus, A., Higgins, D., Slapeta, J., Gray, R. (2014). Uncinaria sanguinis sp. n. (Nematoda: Ancylostomatidae) from the endangered Australian sea lion, Neophoca cinerea (Carnivora: Otariidae). Folia Parasitologica, 61(3), 255-265. [More Information]
  • Haynes, B., Marcus, A., Higgins, D., Gongora, J., Gray, R., Slapeta, J. (2014). Unexpected absence of genetic separation of a highly diverse population of hookworms from geographically isolated hosts. Infection, Genetics and Evolution, 28, 192-200. [More Information]
  • Lynch, M., Kirkwood, R., Gray, R., Robson, D., Burton, G., Jones, L., Sinclair, R., Arnould, J. (2012). Characterization and causal investigations of an alopecia syndrome in Australian Fur seals (Arctocephalus pusillus doriferus). Journal of Mammalogy, 93(2), 504-513. [More Information]
  • Gray, R., Canfield, P., Rodgers, T. (2008). Trace Element analysis in the serum and hair of Antartic Leopard seal, Hydrurga leptonyx, and weddell seal, Leptonychotes weddellii. Science of the Total Environment, 399, 202-215. [More Information]
  • Gray, R., Canfield, P., Rogers, T. (2006). Histology of selected tissues of the leopard seal and implications for functional adaptations to an aquatic lifestyle. Journal of Anatomy, 209(2), 179-199. [More Information]
  • Gray, R., Canfield, P., Rogers, T. (2005). Serum proteins in the leopard seal, Hydrurga leptonyx in Prydz Bay, Eastern Antarctica and coast of NSW, Australia. Comparative Biochemistry and Physiology. Part B: Biochemistry and Molecular Biology, 142(1), 67-78. [More Information]

Conferences

  • Marcus, A., Higgins, D., Gray, R. (2013). Ivermectin treatment of free-ranging Australian sea lion pups: effect on hookworm infection status, pup growth and survival and haematological parameters. Wildlife Disease Association - Australasian Section Conference, n/a: N/A.
  • Marcus, A., Higgins, D., Gray, R. (2013). Prevalence and intensity of hookworm (Uncinaria sp.) infection in free-ranging Australian sea lion (Neophoca cinerea) pups. Wildlife Disease Assoc, Australasia Conference, N/A: N/A.
  • Higgins, D., Lau, Q., Butcher, L., Gray, R. (2012). Use of immunophenotyping to assess the health of two vulnerable endemic Australian species: the koala (Phascolarctos cinerius) and the Australian sea lion (Neophoca cinerea). 61st International conference of the Wildlife Disease Association, N/A: N/A.
  • Gray, R., Canfield, P., Rogers, T. (2006). Hair as a non-invasive sample for trace element and heavy metal analysis in the leopard and Weddell seal. SCAR Open Science Conference.
  • Gray, R., Canfield, P., Rogers, T. (2004). The health status of the leopard seal, Hydrurga leptonyx, in Prydz Bay, Eastern Antarctica and NSW, Australia: a comparative study. Australian Marine Science Association Conference.
  • Gray, R., Canfield, P., Rogers, T. (2003). Haematology and serum biochemistry in the leopard seal (Hydrurga leptonyx) and Weddell seal (Leptonychotes weddellii) in Eastern Antarctica. Wildlife Disease Association Conference.
  • Gray, R., Canfield, P., Rogers, T., McQuilty, R. (2003). Trace metal analysis using inductively coupled plasma mass spectroscopy in the leopard seal (Hydrurga leptonyx) in Prydz Bay, Eastern Antarctica. Australian Mammal Society Conference.

2018

  • Fulham, M., Power, M., Gray, R. (2018). Comparative ecology of Escherichia coli in endangered Australian sea lion (Neophoca cinerea) pups. Infection, Genetics and Evolution, 62, 262-269. [More Information]
  • Taylor, S., Lynch, M., Terkildsen, M., Stevenson, G., Yates, A., Piro, N., de Araujo, J., Gray, R. (2018). Utility of fur as a biomarker for persistent organic pollutants in Australian fur seals (Arctocephalus pusillus doriferus). Science of the Total Environment, 610-611, 1310-1320. [More Information]

2017

  • Diaz, J., Fusaro, B., Vidal, V., Gonzalez-Acuna, D., Costa, E., Dewar, M., Gray, R., Power, M., Miller, G., Blyton, M., et al (2017). Macroparasites in Antarctic Penguins. In Sven Klimpel, Thomas Kuhn, Heinz Mehlhorn (Eds.), Biodiversity and Evolution of Parasitic Life in the Southern Ocean, (pp. 183-204). Cham: Springer. [More Information]

2016

  • March, D., Brown, D., Gray, R., Curthoys, I., Wong, C., Higgins, D. (2016). Auditory anatomy of beaked whales and other odontocetes: Potential for cochlear stimulation via a "vibroacoustic duct mechanism". Marine Mammal Science, 32(2), 552-567. [More Information]

2015

  • Lau, Q., Chow, N., Gray, R., Gongora, J., Higgins, D. (2015). Diversity of MHC DQB and DRB Genes in the Endangered Australian Sea Lion (Neophoca cinerea). Journal of Heredity, 106(4), 395-402. [More Information]
  • Marcus, A., Higgins, D., Gray, R. (2015). Health assessment of free-ranging endangered Australian sea lion (Neophoca cinerea) pups: Effect of haematophagous parasites on haematological parameters. Comparative Biochemistry and Physiology, Part A, 184, 132-143. [More Information]
  • Marcus, A., Higgins, D., Gray, R. (2015). Ivermectin treatment of free-ranging endangered Australian sea lion (Neophoca cinerea) pups: effect on hookworm and lice infection status, haematological parameters, growth, and survival. Parasitology Research, 114, 2743-2755. [More Information]

2014

  • Marcus, A., Higgins, D., Gray, R. (2014). Epidemiology of hookworm (Uncinaria sanguinis) infection in free-ranging Australian sea lion (Neophoca cinerea) pups. Parasitology Research, 113(9), 3341-3353. [More Information]
  • Lau, Q., Wilkin, T., Payne, E., Gray, R., Gongora, J., Higgins, D. (2014). Primers for amplifying major histocompatibility complex class II DQB and DRB exon 2 in the Australian sea lion (Neophoca cinerea). Conservation Genetics Resources, 6(4), 813-816. [More Information]
  • Marcus, A., Higgins, D., Slapeta, J., Gray, R. (2014). Uncinaria sanguinis sp. n. (Nematoda: Ancylostomatidae) from the endangered Australian sea lion, Neophoca cinerea (Carnivora: Otariidae). Folia Parasitologica, 61(3), 255-265. [More Information]
  • Haynes, B., Marcus, A., Higgins, D., Gongora, J., Gray, R., Slapeta, J. (2014). Unexpected absence of genetic separation of a highly diverse population of hookworms from geographically isolated hosts. Infection, Genetics and Evolution, 28, 192-200. [More Information]

2013

  • Marcus, A., Higgins, D., Gray, R. (2013). Ivermectin treatment of free-ranging Australian sea lion pups: effect on hookworm infection status, pup growth and survival and haematological parameters. Wildlife Disease Association - Australasian Section Conference, n/a: N/A.
  • Marcus, A., Higgins, D., Gray, R. (2013). Prevalence and intensity of hookworm (Uncinaria sp.) infection in free-ranging Australian sea lion (Neophoca cinerea) pups. Wildlife Disease Assoc, Australasia Conference, N/A: N/A.

2012

  • Lynch, M., Kirkwood, R., Gray, R., Robson, D., Burton, G., Jones, L., Sinclair, R., Arnould, J. (2012). Characterization and causal investigations of an alopecia syndrome in Australian Fur seals (Arctocephalus pusillus doriferus). Journal of Mammalogy, 93(2), 504-513. [More Information]
  • Higgins, D., Lau, Q., Butcher, L., Gray, R. (2012). Use of immunophenotyping to assess the health of two vulnerable endemic Australian species: the koala (Phascolarctos cinerius) and the Australian sea lion (Neophoca cinerea). 61st International conference of the Wildlife Disease Association, N/A: N/A.

2009

  • Gray, R., Rogers, T., Canfield, P. (2009). Health Assessment of the Leopard Seal, Hydrurga leptonyx, in Prydz Bay, Eastern Antarctica and NSW, Australia. In Knowles R. Kerry, Martin J Riddle (Eds.), Health of Antarctic Wildlife: A Challenge for Science and Policy, (pp. 167-192). Berlin: Springer. [More Information]

2008

  • Barnes, J., Higgins, D., Gray, R. (2008). Pinnipeds. In Larry Vogelnest, Rupert Woods (Eds.), Medicine of Australian Mammals, (pp. 541-589). Collingwood, Australia: CSIRO Publishing.
  • Gray, R., Canfield, P., Rodgers, T. (2008). Trace Element analysis in the serum and hair of Antartic Leopard seal, Hydrurga leptonyx, and weddell seal, Leptonychotes weddellii. Science of the Total Environment, 399, 202-215. [More Information]

2006

  • Gray, R., Canfield, P., Rogers, T. (2006). Hair as a non-invasive sample for trace element and heavy metal analysis in the leopard and Weddell seal. SCAR Open Science Conference.
  • Gray, R., Canfield, P., Rogers, T. (2006). Histology of selected tissues of the leopard seal and implications for functional adaptations to an aquatic lifestyle. Journal of Anatomy, 209(2), 179-199. [More Information]

2005

  • Gray, R., Canfield, P., Rogers, T. (2005). Serum proteins in the leopard seal, Hydrurga leptonyx in Prydz Bay, Eastern Antarctica and coast of NSW, Australia. Comparative Biochemistry and Physiology. Part B: Biochemistry and Molecular Biology, 142(1), 67-78. [More Information]

2004

  • Gray, R., Canfield, P., Rogers, T. (2004). The health status of the leopard seal, Hydrurga leptonyx, in Prydz Bay, Eastern Antarctica and NSW, Australia: a comparative study. Australian Marine Science Association Conference.

2003

  • Gray, R., Canfield, P., Rogers, T. (2003). Haematology and serum biochemistry in the leopard seal (Hydrurga leptonyx) and Weddell seal (Leptonychotes weddellii) in Eastern Antarctica. Wildlife Disease Association Conference.
  • Gray, R., Canfield, P., Rogers, T., McQuilty, R. (2003). Trace metal analysis using inductively coupled plasma mass spectroscopy in the leopard seal (Hydrurga leptonyx) in Prydz Bay, Eastern Antarctica. Australian Mammal Society Conference.

To update your profile click here. For support on your academic profile contact .