Griffith University

BSc, PhD

Postdoctoral Fellow, Griffith School of Environment

Contact details for Dr. Edward Narayan

Research Expertise

• Individual corticosterone variation, stress and personality in amphibians
• Amphibians response and physiological adaptation to disease and climate change.
• Experimental manipulations and physiological stress response in amphibians
• Stress physiology of Australian marsupials (Koalas and Bilbies)
• Assisted breeding and stress endocrinology of amphibians.
• Corticosterone responses to stress in South Pacific Platymantis frogs from markedly different habitats
• Reaction norm for effects of temperature on urinary corticosterone responses to restraint in frogs

Current Projects

Dr. Narayan is currently working with A/Prof. Jean-Marc Hero on climate change adaptation mechanisms of frogs in South-east Queensland.

1. The effects of elevation on physiological responses of frogs, in particular the interactions of climate with immune function and intensity of chytrid fungus infection
   
2. Anthropogenic stressors such as translocation and captive management in relation to management of chytrid infection.

Research Team

Current Memberships

• Board member for Society for Conservation Biology, Board of Governors, Oceania
• Student member of the National Climate Change Adaptation Research Facility (NCCARF), Australia
• Australian Society of Herpetologists
• Australian Ecological Society
• Australian Wildlife Management Society
  

Publications

• Narayan, E., Molinia, F., Cockrem, J., Hero, J-M. (2011). Individual variation, repeatability and behavioural correlates of urinary corticosterone responses to short-term capture in the cane toad (Rhinella marina). Hormones and Behaviour. In review.
• Narayan, E. and Hero, J-M. (2011). Urinary corticosterone responses and haematological stress indices in endangered Fijian ground frog (Platymantis vitiana) during transportation and captivity. Australian Journal of Zoology. In review.
  
• Narayan, E., Hero, J-M., Candy, J.E. and Cockrem, J.F. (2011). Urinary corticosterone responses to short-term capture and captivity in the cane toad (Rhinella marina, formally Bufo marinus). General and Comparative Endocrinology. In review.
• Narayan, E., Molinia, F., Kindermann, C., Cockrem, J. and Hero, J-M. (2011). Urinary corticosterone resonses to short-term capture in the cane toad (Rhinella marina) indicated that toe-clipping is a stressor in amphibians. Hormones and Behaviour. In review.
  
• Narayan, E., Hero, J-M., Christi, K. and Morley, C. (2010). A New Physiological Embryonic Development Pattern in Terrestrial Anurans. Journal of Zoology. In press.
• Narayan, E., Molinia F, Christi, K, Morley, C. and Cockrem, J. (2010). Urinary corticosterone metabolite responses to ACTH and to capture, and annual patterns of urinary corticosterone in wild and captive endangered Fijian ground frogs (Platymantis vitiana). Australian Journal of Zoology. 58, 189-197.
• Narayan, E., Molinia, F, Christi, K, Morley, C. and Cockrem, J. (2010). Annual cycles of urinary reproductive steroid concentrations in the endangered Fijian ground frog (Platymantis vitiana). General and Comparative Endocrinology. 166, 172-179.
• Narayan, E., Christi, K. and Morley, C. (2009). Captive propagation of endangered native Fijian frog:
• Implications for ex-situ conservation and management. Pacific Conservation Biology. 15(1), 47-55.
• Narayan, E., Christi, K., Morley, C. and Trevenen, P. (2008). Sexual dimorphism in cane toad (Bufo marinus): A rapid visual inspection method for sexing individuals. Herpetological Journal. 18(1), 63-65.
• Narayan, E. and Hero, J-M. (2010). Platymantis vitiana; Froglets Morphology. Herpetological Review. 41(4). In press.
• Narayan, E., Christi, K. and Morley, C. (2008). Ecology and reproduction of endangered Fijian ground frog Platymantis vitianus (Anura, Ranidae). South Pacific Journal of Natural Science. 26, 28-32.
• Narayan E., Christi K. and Morley C. (2007). Improvement in ex-situ egg hatchability of Fijian ground frog Platymantis vitianus by laboratory incubation of egg masses. University of the South Pacific, Suva, Fiji. Conservation Evidence. 4, 25-27.
• Narayan, E., Christi, K. and Morley, C. (2007). Captive management of newly hatched froglets of Fijian ground frog (Platymantis vitianus): Lesson learnt from unanticipated invertebrate predator invasion-Fiji Islands. Conservation Evidence. 4, 58-60.
• Narayan, E., Christi, K. and Morley, C. (2007). Provision of natural egg-laying sites for the captive breeding of endangered Fijian ground frog (Platymantis vitianus) in captivity-Fiji Islands. Conservation Evidence. 4, 61-65.
• Narayan, E., Christi, K. and Morley, C. (2007). Conservation of the Fijian ground frog (Platymantis vitianus) through an ex-situ captive management study. Melanesian Geo. 5, 16-17.
• Narayan, E. (2009). Unique embryo developmental characteristics of native Fijian frogs. Melanesian Geo. 7, 30-33.

Published Conference Presentations

• Narayan E. and Hero, J-M. (2010). Amphibian Physiological Response to Chytridiomycosis Intensity along Climatic Gradients in Eastern Australia. Session 14 – Poster. Impacts and adaptation in the tropics. The 2010 International Climate Change Adaptation Conference. Gold Coast Convention Centre, 29th June-1st July.
• Narayan, E., Molinia, F., Christi, K., Morley, C. and Cockrem, J. (2010). Non-invasive urinary corticosterone stress responses and reproductive steroids in wild and captive endangered Fijian frog. Sixth Intercongress Symposium of the Asia and Oceania Society for Comparative Endocrinology (AOSCE). 19-22 January. Massey University, Palmerston North. Conference Notes. Page 58.
• Narayan, E., Hero, J-M., Candy, J.E. and Cockrem, J.F. (2010). Urinary corticosterone response to short-term capture and captivity in the cane toad (Bufo marinus). 27th meeting of the Australian New Zealand Society for Comparative Physiology and Biochemistry. Friday 3rd to Sunday 5th December 2010. The Australian National University.
• Narayan, E. (2009). Island Species-Led Action course Fiji Invited Lecture. The reproductive biology of Fijian ground frog on Viwa Island. The University of the South Pacific, Fiji Islands. July; 6-15th.
• Narayan, E, Molinia F, Cockrem J, Christi K. and Morley C. (2008). Sex identification of the endangered Fijian ground frog (Platymantis vitianus) by non-invasive urine steroid analysis: Implications for captive propagation. Australasian Wildlife Management Society (AWMS) meeting will be held at the Esplanade Hotel, Fremantle, Western Australia. Nov; 24-27th.
• Narayan, E, Molinia F, Christi K. and Morley C. (2008). Non-invasive monitoring of reproductive hormones in the endangered Fijian ground frog (Platymantis vitianus). Ecological Society of Australia (ESA) Annual Meeting- The University of Sydney, Dec; 1-5th.
• Narayan, E, Molinia F, Cockrem J, Christi, K and Morley C. (2008). "Non-invasive monitoring of stress hormones in the endangered Fijian ground frog (Platymantis vitianus). Australia and New Zealand Society for Comparative Physiology and Biochemistry (ANZSCPB) Annual Meeting- The University of Sydney, Dec; 5-8th.
• Narayan, E, Christi, K and Morley, C. (2007). "Captive Breeding Programmes for an Endangered Fijian frog (Platymantis vitianus): Implications for Conservation and Management". Australian Herpetological Society Meeting (ASH) Camp Quaranup, Albany, Western Australia.
• Narayan, E, Christi, K. and Morley, C. (2007). Captive management, Breeding and Aspects of Reproductive Physiology of the Fijian ground frog Platymantis vitianus. Biodiversity and Extinction Crisis Conference, University of New South Wales, in Sydney, Australia.
• Narayan, E, Morley, C. and Christi, K. (2006). Captive management, Breeding and Aspects of Reproductive Physiology of the Fijian ground frog Platymantis vitianus Australasian Wildlife Management Society- AWMS conference in Auckland, New Zealand.

Other publications

• Narayan, E. (2009). Doctor of Philosophy (PhD) thesis “Biology of the endangered Fijian ground frog (Platymantis vitiana): Breeding and Reproductive Endocrinology” completion seminar presentation. Faculty of Science, Technology and Environment. University of the South Pacific, Suva, Fiji.
• Narayan, E. (2008). Landcare Research and University of Auckland Joint CBB Seminar Series 2008. “Conservation of the endangered Fijian ground frog, Platymantis vitianus: Breeding and Reproductive Endocrinology” 40 minutes presentation. University of Auckland, Tamaki Campus (21st October).
• Narayan, E. (2008). University of Auckland School of Biological Sciences Seminar Series 2008. “Non-invasive Monitoring of Reproductive and Stress Steroids of Endangered Fijian Ground Frog (Platymantis vitianus)” 40 minutes presentation. University of Auckland, City Campus (30th October).
• Narayan, E, Christi, K, and Morley, C. (2008). “Captive Breeding Programme for Endangered Fijian Frogs” Biodiversity and Conservation Research Day Institute of Applied Sciences University of the South Pacific.