A5021552989- Reproductive Physiology in Livestock
- Reproductive Biology and Fertility
- Genetic and phenotypic traits in livestock
- Sperm and Testicular Function
- Ovarian function and disorders
- Effects of Environmental Stressors on Livestock
- Animal Nutrition and Physiology
- Animal Behavior and Welfare Studies
- Meat and Animal Product Quality
- Animal Genetics and Reproduction
- Animal health and immunology
- Renal and related cancers
- Ruminant Nutrition and Digestive Physiology
- Milk Quality and Mastitis in Dairy Cows
- Veterinary Equine Medical Research
- Reproductive System and Pregnancy
- Seed Germination and Physiology
- Estrogen and related hormone effects
- Testicular diseases and treatments
- Birth, Development, and Health
- Rabbits: Nutrition, Reproduction, Health
- Assisted Reproductive Technology and Twin Pregnancy
- Reproductive Health and Technologies
- Hypothalamic control of reproductive hormones
- Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
University of Guelph
2016-2025
Ontario Veterinary College
2019-2024
CSIRO Publishing
2021
Seoul National University
2021
University of Saskatchewan
1997-2007
Western University of Health Sciences
1998-2005
Newcastle University
2001
Physiological Society
2000
University of Computer Sciences and Economics in Olsztyn
1995
Transrectal ultrasonography of ovaries was performed each day in non-prolific Western white-faced (n = 12) and prolific Finn ewes 7), during one oestrous cycle the middle portion breeding season (October–December), to record number size all follicles ± 3 mm diameter. Blood samples collected once a were analysed by radioimmunoassay for concentrations LH, FSH oestradiol. A cycle-detection computer program used identify transient increases oestradiol individual ewes. Follicular hormonal data...
The aim of the present study was to document ovarian antral follicle dynamics throughout seasonal anoestrus in sheep. Daily transrectal ultrasonography performed during four 17 day scanning periods from March July Western White-faced crossbred ewes. Blood samples were collected each with ultrasonographic for measurement serum concentrations FSH, oestradiol and progesterone. also taken every 15 min 6 h, mid-way through period examination, determine patterns secretion gonadotrophic hormones....
The ultrasonographic image of an organ is a product scattering and reflection high-frequency ultrasound beams by discrete units tissue. number acoustic tissue interfaces vascularity affects the quantitative characteristics grey-scale images. This study was undertaken to examine influences scrotal/testicular integument blood flow on testicular echotexture parameters in ram. Serial images were obtained during surgical castration 7 Rideau Arcott rams aged 20-22 weeks. first 2 sets taken through...
There is a paucity of information on the relationships testicular morphology, echotextural attributes, and blood flow dynamics with pubertal development rams raised in subtropical climate. Forty-five Dorper (24 aged 8-11 months 21 12-24 months) were examined using portable ultrasound scanner connected to 7.5-MHz transducer. Computer-assisted analyses ultrasonograms utilized commercially available Image ProPlus® analytical software. Spectral Doppler scans arteries performed immediately after...
Brazil has presented tremendous progress in non-surgical embryo transfer (NSET) sheep and goats. New instruments techniques for recovery (NSER) NSET small ruminants were implemented. Recent improvements include refinement of the protocols cervical relaxation combining oestradiol-oxytocin-cloprostenol treatment at specific times before NSER sheep; recipient goats do not require any hormonal drugs to induce dilation direct by route yields excellent results. Transrectal ovarian ultrasonography...
Early embryo development (EED) forms the basis of assisted reproductive technologies (ARTs), which are used to treat human infertility and propagate other mammalian species. Thyroid hormones (THs) play an important role in post-implantation mammals; however, effects THs on pre-attachment embryos not known. Currently utilized in-vitro production media devoid hence our main objective was examine whether affected EED a bovine model.To determine if present at site fertilization cattle, we...
Breeding soundness evaluation (BSE) is the primary assessment for determining reproductive potential of male animals. This method, however, cannot be used to evaluate semen frequently or predict future quality. Computerized analysis ultrasonographic images provides information on histophysiological changes in organs. We hypothesized that: (i) parameters would correlate with characteristics distal region (cauda) epididymis and (ii) testicular ultrasound and/or circulating testosterone...
There were two goals of the present experiment, namely (1) to determine and compare concentrations basal nutrients anti-nutrients in grain a modern hybrid rye barley cultivars, (2) effectiveness rye- barley-containing diets for pig fattening. Crude protein starch contents greater (P < 0.01) (cv. Visello) than Bryl) but fibre total lipid lower grain. Mean alkylresorcinols pentosans, as well activity trypsin inhibitors, all higher In all, 150 PIC gilts randomly divided into equinumerous...
The onset of spermatogenesis during prepubertal development is accompanied by dynamic changes in testicular microstructure. Computer-assisted analysis scrotal ultrasonograms may allow us to track these a noninvasive manner; however, the echotextural characteristics different histomorphological variables remain unclear. Hence objective this study was compare and microscopic attributes testis over first wave prepubescent ram lambs. Bi-weekly ultrasound examinations weekly biopsies were carried...
This study examined the feasibility of transcervical embryo recovery after hormonal treatment to induce cervical dilation, following 7-day oestrous synchronization protocol in multiparous Santa Inês ewes. A total 23 cyclic ewes received two doses 37.5 μg d-cloprostenol by latero-vulvar route 7 days apart. After second injection d-cloprostenol, were checked for oestrus (every 12 hr) and then mated fertile rams throughout period. All (latero-vulvar) 1 mg oestradiol benzoate either...
The aim of this study was to analyze the factors that can influence pork prices, particularly effects various types fluctuations on volatility prices in European Union as a whole market and individual EU countries. research material consisted monthly time series collected from 2009 2020. These data originated Integrated System Agricultural Information coordinated by Polish Ministry Agriculture. global production volumes is Food Agriculture Organization Statistics (FAOSTAT) database. Time...