A5084587766- Genetic and phenotypic traits in livestock
- Ruminant Nutrition and Digestive Physiology
- Reproductive Physiology in Livestock
- Effects of Environmental Stressors on Livestock
- Agriculture Sustainability and Environmental Impact
- Pasture and Agricultural Systems
- Meat and Animal Product Quality
- Dyeing and Modifying Textile Fibers
- Animal Nutrition and Physiology
- Textile materials and evaluations
- Agroforestry and silvopastoral systems
- Industrial Vision Systems and Defect Detection
- Livestock Farming and Management
- Global trade, sustainability, and social impact
- Bioenergy crop production and management
- Agriculture and Rural Development Research
- Rural development and sustainability
- Nuclear Materials and Properties
- Rabbits: Nutrition, Reproduction, Health
- Vector-Borne Animal Diseases
- Genetic Mapping and Diversity in Plants and Animals
- Agricultural Economics and Policy
- Research in Cotton Cultivation
- Education Systems and Policy
- Agricultural and Rural Development Research
University of New England
2011-2018
University College Dublin
2015-2018
St Vincent's Hospital Sydney
2018
The University of Melbourne
2018
Poultry CRC
2017
University of Tasmania
2016
Florida State University
2014
SUNY Geneseo
2014
Idaho National Laboratory
2013-2014
Scotland's Rural College
2012-2013
Nitrate may serve as a non-protein nitrogen (NPN) source in ruminant diets while also reducing enteric methane emissions. A study was undertaken to quantify emissions of cattle when nitrate replaced urea high concentrate diet. Twenty Angus steers were allocated two treatment groups and acclimated one iso-energetic iso-nitrogenous finisher rations (containing NPN or calcium nitrate), with all individual feeding events recorded. single measurement device (C-lock Inc., Rapid City, SD, USA)...
Spot measurements of methane emission rate (n = 18 700) by 24 Angus steers fed mixed rations from GrowSafe feeders were made over 3- to 6-min periods a GreenFeed monitoring (GEM) unit. The data analysed estimate daily production (DMP; g/day) and derived yield (MY; g/kg dry matter intake (DMI)). A one-compartment dose model spot v. time since the preceding meal was compared with models Wood (1967) Dijkstra et al. (1997) average measures. Fitted values for DMP calculated area under curves. Two...
The present paper reviews estimation methods for measuring pasture intake of individual grazing animals, in particular, the use indigestible plant markers. Natural alkanes and alcohols function essentially as an internal marker thus accommodate differences forage digestibility among individuals those arising from interactions between supplement forage. An estimate diet composition partitions total into its component species. Estimates require correction incomplete faecal recovery, where...
This review explores research and development in wool metrology to date. In doing so, it highlights the work undertaken by three organisations, particular, of textile covering all important physical properties wool. Three key centres at beginning twenty-first century were CSIRO's Division Textile Fibre Technology Belmont near Geelong, Victoria, School Science Technology, University NSW Kensington, Australia, Wool Research Organisation New Zealand Inc. Lincoln Christchurch, Zealand. Due...
As daily methane production (DMP; g CH4/day) is strongly correlated with dry matter intake (DMI), the breeding of cattle that require less feed to achieve a desired rate average gain (ADG) by selection for low residual (RFI) can be expected reduce DMP and also emission intensity (EI; CH4/kg ADG). An experiment was conducted compare EI Angus genetically divergent RFI 400-day weight (400dWT). In 6-week grazing study, 64 yearling-age (30 steers, 34 heifers) were grazed on temperate pastures,...
Methane yield values (MY; g methane/kg dry-matter intake) in beef cattle reported the global literature (expanded MitiGate database of methane-mitigation studies) were analysed by cluster and meta-analyses. The Ward k means analyses included accounting for categorical effects methane measurement method, breed type, country or region study, age sex cattle, proportion grain diet standardised continuous variables number animals, liveweight MY. After removal data from outlier studies,...
The susceptibility of wool to yellowing was determined on samples from fleeces 36 Merino wethers by a laboratory procedure involving incubation at 40�C for 5 days. sheep, although originating several different flocks, had been grazing together 6 years. These susceptibilities were compared with the concentrations suint and wax in fleece, fibre diameter, mineral or yolk greasy wool. While correlated content (r = 0.852), highest correlations potassium either before 0.947) after 0.938)...
A farmlet experiment was conducted between July 2000 and December 2006 as part of the Cicerone Project, which sought to enhance profitability sustainability grazing enterprises on Northern Tablelands New South Wales, Australia. self-replacing Merino enterprise grazed dominant livestock enterprise, together with ~20% carrying capacity cattle, each three treatments: higher levels soil fertility pasture renovation flexible rotational over eight paddocks (farmlet A), moderate B) intensive 37 C)....
Greenhouse gas emissions (GHG) from broadacre sheep farms constitute ~16% of Australia’s total livestock emissions. To study the diversity Australian farming enterprises a combination modelling packages was used to calculate GHG three (Merino ewe production for wool and meat, Merino-cross ewes with an emphasis on lamb production, Merino wethers fine production) at 28 sites across eight climate zones in southern Australia. per ha, dry equivalents intensity (EI) tonne clean or liveweight sold...
1. In hay-fed, cannulated sheep the apparent degradation in and outflow from rumen were determined for graded doses of mixtures amino acids lysine, threonine methionine, administered intraruminally using polyethylene glycol (PEG) as a liquid marker. The ranged between 2.5 15 g each acid mixtures. 2. Relative rate first 4 h was highest lowest methionine. 24 lysine threonine. Conversely fraction flowing out intact form lysine. Rates well dose-dependent. 3. validity estimated corroborated by...
SUMMARY Selection index theory was used to model the effects of methane (CH 4 ) production in breeding objective on genetic responses Scottish Blackface sheep hill systems UK. A range economic values (EVs) were assumed for CH calculated from possible carbon prices (£/t CO 2 equivalent (CO -e)). The implicit price required maintenance levels or reduce by 0·1 kg/head/yr a flock calculated. predicted changes current selection programmes that have an EV zero Correlations between traits and...
The objective of this study was to assess the impact using different relative economic values (REVs) in selection indices on predicted financial and trait gains from sires cows choice leading Holstein bulls available UK dairy industry. Breeding traits were milk yield, fat protein lifespan, mastitis, non-return rate, calving interval lameness. Relative importance a trait, as estimated by a.h(2), only moderately related rate loss or total merit (ΔTEM) per percentage under- overestimation REV...
The Cicerone Project conducted a grazed farmlet experiment on the Northern Tablelands of New South Wales, Australia, from July 2000 to December 2006, address questions raised by local graziers concerning how they might improve profitability and sustainability their grazing enterprises. This unreplicated examined three management systems at whole-farmlet scale. control (farmlet B) represented typical for region, with flexible rotational moderate inputs. A second A) also used but had higher...
In experiment 1, 6 groups, each of 10 superfine Merino wethers, were individually penned indoors and hand-fed oats, wheat straw whole lupins, either alone or with 2 g/day DL-methionine 6.6 fatty acid coated methionine (Ketionin) for 23 weeks. Following shearing the groups lucerne-chopped hay in hydroxymethyl-methionine (Mepron) Ketionin both experiments rations fed at maintenance level offered 3 times a week. Half sheep had no rumen ciliate protozoa following treatment previous trial....
Abstract Evidence is provided in support of proteolytic denaturation free and immobilized preparations glucose isomerase from a Bacillus species. A number methods to improve the stability with respect proteolysis have been tested their advantages as well shortcomings are discussed. These include hollow‐fiber treatment, gel permeation, thermal addition protease inhibitors. The half‐life cellulose acetate fiber‐entrapped can be significantly improved. For example, treatment by an order magnitude.
It is sometimes possible to breed for more uniform individuals by selecting animals with a greater tendency be less variable, that is, those smaller environmental variance. This approach has been applied reproduction traits in various animal species. We have evaluated fecundity the Irish Belclare sheep analyses of flocks differing average litter size (number lambs per ewe year, NLB) and estimated genetic variance lambing using double hierarchical generalized linear models (DHGLM). The data...