A5045833138- Animal Behavior and Welfare Studies
- Wildlife Ecology and Conservation
- Reproductive Physiology in Livestock
- Effects of Environmental Stressors on Livestock
- Genetic and phenotypic traits in livestock
- Marine animal studies overview
- Sperm and Testicular Function
- Animal Behavior and Reproduction
- Veterinary Medicine and Surgery
- Reproductive Biology and Fertility
- Animal Nutrition and Physiology
- Meat and Animal Product Quality
- Human-Animal Interaction Studies
- Veterinary Oncology Research
- Primate Behavior and Ecology
- Arctic and Antarctic ice dynamics
- Ichthyology and Marine Biology
- Fish Ecology and Management Studies
- Rabbits: Nutrition, Reproduction, Health
- Evolution and Paleontology Studies
- Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
- Veterinary Equine Medical Research
- Ecology and biodiversity studies
- Microbial infections and disease research
- Marine and fisheries research
The University of Queensland
2015-2024
Agriculture and Food
2015-2024
Taronga Conservation Society Australia
2011-2014
Deakin University
2014
Australia Zoo
2008-2013
The University of Sydney
2011-2012
Minnesota Zoo
2007
North Carolina State University
1994
North Carolina Department of Agriculture and Consumer Services
1991
In the context of reproduction, glucocorticoids (GCs) are generally considered to have negative effects. However, in well-studied model species, GCs fluctuate predictability across estrous cycles, and short-term increases promote healthy ovarian function. Reproductive challenges plagued captive elephant populations, which not currently self-sustaining. Efforts understand reproductive dysfunction elephants focused on suppressive effects cortisol, but potential permissive or stimulatory...
Knowledge of male reproductive status and activity in free-ranging animals is vital to understanding patterns population dynamics. Until now, almost all information regarding behavior the dugong, a cryptic marine mammal, has relied on post-mortem examination. We examined relationships between body length, tusk eruption (secondary sexual characteristic), seasonality, group association fecal testosterone metabolite concentrations 322 dugongs (159 males, 163 females) subtropical Moreton Bay,...
Feedlot cattle are at times exposed to high environmental temperatures. Faecal cortisol metabolites (FCM), were related possible indicators of heat stress that could be measured under field conditions: respiratory dynamics (respiration rate; RR), body surface temperature and adaptive behaviours, such as water consumption, posture (standing, lying), activity (eating, drinking rumination). Twelve (12) yearling Black Angus steers divided into two treatment groups: a hot (HOT; n = 6)...
Broiler breeders were housed in pens an all-litter house with 8-h photoperiod from hatching to 20 wk of age. They reared either the presence or absence perches (7 cm per bird) and on a 14% 17% CP diet. The duration tonic immobility (TI) fear response was measured 15- 20-wk-old birds; each pullet tested individually once only. There apparent age-related increase TI, which attenuated by provision during rearing. results are discussed terms maturational environmental influences development...
The aim of the present study was to develop a protocol for successful cryopreservation Saltwater crocodile spermatozoa. Sperm cells were frozen above liquid nitrogen vapour in phosphate-buffered saline (PBS) containing either 0.3M trehalose, raffinose or sucrose and compared with glycerol (0.3-2.7M). Although highest levels mean post-thaw motility observed following trehalose (7.6%) (7.3%), plasma membrane integrity (PI) best 2.7M (52.5%). A pilot then assessed cytotoxicity prior revealed no...
Historically, reproductive health in wildlife species has been evaluated primarily via immunoassay detection of fecal and urinary steroid hormone metabolites. This combination sample type, biomarker category, assay preferred for decades due to the ease assessing through evaluation stable compounds easily collected biological samples using a cost-effective method. Increasingly, beginning with high performance liquid chromatography (HPLC) more recently convergence ultra HPLC coupled mass...
Volunteer wildlife rehabilitators rescue and rehabilitate thousands of native animals every year in Australia. However, there is little known about how exposure to novel stimuli during rehabilitation could affect the physiology wildlife. We investigated this question a species that commonly enters rehabilitation, common brushtail possum (Trichosurus vulpecula). evaluated five enzyme immunoassays (EIA) determine most suitable for measuring faecal glucocorticoid metabolites (FGM) as proxy...
Abstract Devil Facial Tumour Disease (DFTD), a highly contagious cancer, has decimated Tasmanian devil ( Sarcophilus harrisii ) numbers in the wild. To ensure its long-term survival, captive breeding program was implemented but not been as successful envisaged at launch 2005. We therefore investigated reproductive success of 65 pair combinations, which 35 produced offspring (successful pairs) whereas remaining 30 pairs, despite being observed mating, no (unsuccessful pairs). The devils were...
Background Stress can play a role in disease incidence all species via immunosuppression and has been implicated as contributing factor significant infectious diseases of koalas. Faecal cortisol measurement may represent non‐invasive methodology for quantifying stress Methods We used an ACTH (adrenocorticotropic hormone) stimulation test (10 IU ) to induce sustained secretion cortisol, which was measured serum samples from four koalas subsequently it attempted locate corresponding elevation...
This study describes the progesterone profile during pregnancy in sexually mature female captive short-beaked echidnas ( Tachyglossus aculeatus ). Echidnas were monitored daily by video surveillance to confirm key reproductive behaviour. Plasma samples collected and pouch morphology was assessed three times a week. The of echidna only develops gestation it possible create four-stage grading system using most distinguishable characteristics development. Maximum development associated with...
The present study reports novel aspects of the reproductive biology male common ringtail possum (Pseudocheirus peregrinus). Plasma testosterone was measured through a stimulation test using gonadotrophin-releasing hormone agonist, buserelin. Following intra-muscular administration buserelin, there an increase (P < 0.05) in concentration peripheral circulation 4 h later. Quantitative testicular histology this species described for first time. Eight stages seminiferous epithelium cycle were...
Respiratory vapour (blow) has been successfully used as a sample matrix for reproductive and adrenal endocrine assessments of some captive cetacean species. Given that the accuracy blow hormone measurements can be affected by seawater contamination, variable volumes, respiratory water dilution, it is much more difficult technique to use studies on wild cetaceans. Herein, we aimed determine if sampling was viable measure concentrations in humpback whales (Megaptera novaeangliae). To achieve...