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Cell block cytology. Improved preparation and its efficacy in diagnostic cytology.
- N. Nathan, E. Narayan, M. M. Smith, M. J. Horn
- MedicineAmerican journal of clinical pathology
- 1 October 2000
A modified cell block technique using an improvised ethanol formalin fixative (Nathan alcohol formalin substitute) followed by a simple paraffin processing schedule is described, which offers excellent cytomorphologic features corresponding closely to cells in Papanicolaou-stained smears and ensures optimal preservation of histochemical and immunocytochemical properties.
Urinary corticosterone metabolite responses to capture, and annual patterns of urinary corticosterone in wild and captive endangered Fijian ground frogs (Platymantis vitiana)
Urinary corticosterone enzyme immunoassays can be used in frogs for assessing stress responses to capture and natural stress profiles of both captive and wild populations, and the first demonstration of a urinary cortic testosterone response to capture in amphibians.
Non-invasive evaluation of physiological stress in an iconic Australian marsupial: the Koala (Phascolarctos cinereus).
Non-invasive reproductive and stress endocrinology in amphibian conservation physiology
- E. Narayan
- Biology, Environmental ScienceConservation Physiology
- 24 May 2013
This review focuses on non-invasive endocrinology, which is a key component of amphibian conservation physiology and provides a direct physiological measure of population sensitivity to extreme environments and their sub-lethal impacts on reproduction, health and survival.
The relationship between physiological stress and wildlife disease: consequences for health and conservation
- Stephanie Hing, E. Narayan, R. Thompson, S. Godfrey
- Environmental ScienceWildlife Research
- 20 April 2016
It is recommended that increased attention be given to the influence of anthropogenic stressors including climate change, habitat loss and management interventions on disease dynamics in wildlife populations.
Urinary corticosterone responses to capture and toe-clipping in the cane toad (Rhinella marina) indicate that toe-clipping is a stressor for amphibians.
Sight of a Predator Induces a Corticosterone Stress Response and Generates Fear in an Amphibian
Novel evidence is provided that the sight of a predator can induce a corticosterone response and lead to increased fearfulness in amphibians and that endemic frogs can recognise an introduced predator as a threat.
Repeatability of baseline corticosterone and short-term corticosterone stress responses, and their correlation with testosterone and body condition in a terrestrial breeding anuran (Platymantis…
Inverse urinary corticosterone and testosterone metabolite responses to different durations of restraint in the cane toad (Rhinella marina).
Non-invasive evaluation of physiological stress hormone responses in a captive population of the greater bilby Macrotis lagotis
Female bilbies had higher average faecal cortisol metabolite concentrations and higher day-to-day variation than male bilbies; however, there was no relationship with bilby age, which suggests an interaction between responses to short-term and long-term stressors which is perhaps due to habituation and/or facilitation of long- term stressors.