A5006752769- Animal Behavior and Welfare Studies
- Animal Nutrition and Physiology
- Livestock and Poultry Management
- Effects of Environmental Stressors on Livestock
- Genetic and phenotypic traits in livestock
- Human-Animal Interaction Studies
- Wildlife Ecology and Conservation
- Marine and coastal plant biology
- Meat and Animal Product Quality
- Animal Behavior and Reproduction
- Plant and animal studies
- Insect and Pesticide Research
- Primate Behavior and Ecology
- Marine Biology and Ecology Research
- Echinoderm biology and ecology
- Ruminant Nutrition and Digestive Physiology
- Aquatic Ecosystems and Phytoplankton Dynamics
- Biological Control of Invasive Species
- Marine Sponges and Natural Products
- Animal Disease Management and Epidemiology
- Rabbits: Nutrition, Reproduction, Health
- Marine Biology and Environmental Chemistry
- Ecology and Vegetation Dynamics Studies
- Crustacean biology and ecology
- Freshwater macroinvertebrate diversity and ecology
The University of Sydney
2013-2024
Poultry CRC
2015
University of Colorado Denver
1999-2014
University of Colorado Health
2006-2007
University of Notre Dame
1995-2006
Cooperative Institute for Research in Environmental Sciences
1998-2006
Agriculture Victoria
1988-2003
University of North Carolina at Chapel Hill
1996-2002
Wageningen University & Research
1985-1991
Physical stress to seaweeds and hunger of herbivores can influence the outcome chemically mediated seaweed—herbivore interactions. The unpalatable brown seaweed Dictyota ciliolata produces diterpenoid secondary metabolites pachydictyol A, dictyol B acetate, dictyodial. At natural concentrations, A deterred sea urchin Arbacia punctulata but did not inhibit feeding by pinfish Lagodon rhomboides or amphipod Ampithoe longimana until concentrations were 2.5—5 times levels. Dictyol acetate urchin,...
Grazing by the generalist amphipod Ampithoe longimana induced increased concentrations of defensive secondary metabolites in brown alga Dictyota menstrualis and made seaweed less susceptible to further attack amphipod. Although A. preferentially consumes D. menstrualis, its feeding rates can be reduced significantly high diterpenoid dictyols produced alga. In 1991, from sites with numbers had higher levels grazing scars, dictyols, were palatable than plants few amphipods. Among—site...
The separate and interactive effects of light intensity nutrient availability on the growth, protein content, concentration C-based secondary metabolites, susceptibility to herbivory two brown seaweeds, Dictyota ciliolata (Dictyotales) Sargassum filipendula (Fucales), were assessed in context carbon/nutrient balance (CNB) hypothesis. Responses its terpenoid metabolites often at variance with predictions CNB hypothesis while several responses phenolic predicted by Findings for these, other,...
Severe feather-pecking (SFP), a particularly injurious behaviour in laying hens (Gallus gallus domesticus), is thought to be negatively correlated with range use free-range systems. In turn, inversely associated fearfulness, where fearful birds may less likely venture outside. However, very few experiments have investigated the proposed association between and fearfulness. This experiment associations (time spent outside), plumage damage, BW. Two pens of 50 ISA Brown (n=100) were fitted...
Temporary confinement during parturition and early postpartum may provide an intermediary step preceding loose housing that offers improvement in sow piglet welfare. Three experiments were conducted to investigate the implications of replacing farrowing crates (FCs) with alternative system from 3 days until weaning. In each experiment sows farrowed FCs randomly allocated at day lactation either a FC or pen increased floor space (lactation (LP)) 1, growth skin injuries recorded for 32 128...
This experiment investigated effects of environmental enrichment and beak-trimming during the rearing period on behavior in plumage damage later life. Treatments were applied a 2 × factorial arrangement. Half birds beak-trimmed at 1 d age using an infra-red laser. A follow-up light-trim was performed 11 wk with hot blade. Environmental consisted pecking strings, whole oats litter, greater litter depth. Sixteen pens 50 ISA Brown laying hens used. Four pullets selected from each pen as focal...
Tests for attention bias potentially offer more rapid assessment of affective state in animals than existing cognitive methods. An test has previously been developed sheep and validated as a measure anxious states. The 3 minute assessed behavioural responses an enclosed arena after brief exposure to the threat dog. Experiment 1 current study aimed refine method, removing need habituation period shortening duration. Sheep were given either anxiolytic drug, anxiogenic drug or control treatment...
The omnivorous crayfish Procambarus clarkii fed selectively on several species of macrophytes, preferring delicate fresh plants that had filamentous or finely-branched architectures. When the macrophytes were dried, powdered, and reconstituted into an alginate gel (thus eliminating among-species differences in physical characteristics), preferences altered; previously tough high nitrogen protein preferred over low protein. Even though plant structure influences feeding decision crayfish,...
The Australian dairy herd size has doubled over the last 20 years substantially increasing time that farmers require for individual animal attention to monitor and intervene with events such as calving. Technology will help focus this limited labour resource on cows assistance. objective of experiment was first determine profiles rumination duration level activity determined by sensors between, within, days around calving second use these data predict day pasture-based cows. After 2 weeks...