A5089813494- Ruminant Nutrition and Digestive Physiology
- Genetic and phenotypic traits in livestock
- Reproductive Physiology in Livestock
- Reproductive Biology and Fertility
- Effects of Environmental Stressors on Livestock
- Fatty Acid Research and Health
- Growth Hormone and Insulin-like Growth Factors
- Adipose Tissue and Metabolism
- Meat and Animal Product Quality
- Agriculture Sustainability and Environmental Impact
- Birth, Development, and Health
- Cancer-related molecular mechanisms research
- Animal Nutrition and Physiology
- Sperm and Testicular Function
- Animal health and immunology
- Genetic Mapping and Diversity in Plants and Animals
- Muscle metabolism and nutrition
- Animal Genetics and Reproduction
- Reproductive System and Pregnancy
- Turfgrass Adaptation and Management
- Peroxisome Proliferator-Activated Receptors
- Gut microbiota and health
- Muscle Physiology and Disorders
- Lipid metabolism and biosynthesis
- Animal Nutrition and Health
Teagasc - The Irish Agriculture and Food Development Authority
2016-2025
University College Dublin
2016-2025
Unité Mixte de Recherche sur les Herbivores
2025
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2025
Byrd Polar and Climate Research Center
2023
Columbus Center
2023
Technological University Dublin
2022
Munster Technological University
2021
Bioscience Research
2010-2020
Harper Adams University
2016
Higher systemic progesterone in the immediate post-conception period is associated with an increase embryonic growth rate, interferon-tau production and pregnancy rate cattle. The objective of this study was to examine effect increasing concentration on Day 3 subsequent embryo survival development. Oestrus (Day 0) synchronised beef-cross heifers (n = 210) approximately two-thirds were inseminated semen from a proven sire, while remainder not inseminated. In order produce animals divergent...
ABSTRACT Feed-efficient animals have lower production costs and reduced environmental impact. Given that rumen microbial fermentation plays a pivotal role in host nutrition, the premise microbiota may contribute to feed efficiency is gaining momentum. Since diet major factor determining community structure patterns, we investigated effect of divergence phenotypic residual intake (RFI) on ruminal beef cattle across two contrasting diets. PCR-denaturing gradient gel electrophoresis (DGGE)...
This study examined the relationship of feed efficiency and performance with feeding behavior, blood metabolic variables, various body composition measurements in growing beef heifers. Individual DMI growth were measured yearling Limousin x Holstein-Friesian heifers [n = 86; initial BW 191.8 (SD 37) kg] fed a TMR diet comprising 70:30 concentrate:corn silage on DM basis (ME 2.65 Mcal/kg DM; 580 g/kg) for 82 d. Meal duration (min/d) meal frequency (events/d) calculated each animal daily using...
No genetic parameters for performance and feed efficiency traits are available Irish performance-tested bulls. The objective of this study was to determine the phenotypic variation intake, BW, ADG, measures including conversion ratio (FCR), relative growth rate, Kleiber ratio, residual BW gain (RG), intake (RFI). Observations were on up 2,605 bulls each trait from one test station across 24 yr; breeds included in analyses Aberdeen Angus (AN), Charolais (CH), Hereford, Limousin (LI),...
LIM domain-containing transcription factors, including the LIM-only rhombotins and LIM-homeodomain proteins, are crucial for cell fate determination of erythroid neuronal lineages. The zinc-binding domains mediate protein-protein interactions, interactions between nuclear proteins factors with restricted expression patterns have been demonstrated. We isolated a novel protein, interactor (NLI), that specifically associates single domain in all tested. NLI is expressed nuclei diverse types...
Severe prenatal undernutrition is usually associated with low birth weights in offspring and disorders including hypertension, obesity, diabetes. Whether alterations maternal nutrition insufficient to impair weight or growth impact the cardiovascular, stress, metabolic systems unknown. In addition, little known about effects of dietary restriction on development reproductive system mammals. Here, we use bovine model, which has a gestational length rate similar humans, show that from...
This study examined the relationship between feed efficiency and performance, feeding behavior, blood metabolic variables, various ultrasonic measurements in finishing beef heifers. Within-animal repeatability estimates of intake efficiency, body measures, plasma analytes across growing stages lifespan animal were also calculated. Fifty heifers previously ranked as yearlings on phenotypic residual (RFI) used. Animals [initial BW = 418 (SD 31.5) kg] offered a TMR diet consisting 70:30...
This study examined the relationship of residual feed intake (RFI) and performance with methane emissions, rumen fermentation, digestion in beef heifers. Individual DMI growth were measured for 22 Simmental heifers (mean initial BW 449 kg, SD = 46.2 kg) offered grass silage ad libitum 120 d. Ultrasonically scanned muscle fat depth, BCS, muscularity score, skeletal measurements, blood variables, fermentation (via stomach tube), total tract digestibility (indigestible marker) measured. Methane...
Abstract Background The liver is central to most economically important metabolic processes in cattle. However, the changes expression of genes that drive these remain incompletely characterised. RNA-seq new gold standard for whole transcriptome analysis but so far there are no reports its application differential gene cattle liver. We used study differences profiles hepatic and their associated pathways individual either mild negative energy balance (MNEB) or severe (SNEB). NEB an imbalance...
Periodic feed restriction is used in cattle production to reduce costs. When normal levels are resumed, catch up a weight by an acceleration of growth rate, known as compensatory growth, which not yet fully understood. Illumina Miseq Phylogenetic marker amplicon sequencing DNA extracted from rumen contents 55 bulls showed that (70% concentrate, 30% grass silage) for 125 days, caused 60% reduction resulted large increase relative abundance Methanobrevibacter gottschalkii clade (designated...
Negative energy balance (NEB) during early lactation in dairy cows leads to an altered metabolic state that has major effects on the production of IGF family members. Low IGF-I concentrations are associated with poor fertility and therefore we aimed determine whether NEB exerts a direct effect expression postpartum oviduct. Multiparous Holstein were allocated two treatments (each n=6) designed using differential feeding milking regimes produce either mild (MNEB) or severe (SNEB). Animals...