World's Best Scientists 2026 revealed!

D-Index & Metrics

Animal Science and Veterinary

D-Index
31
Citations
3601
World Ranking
2287
National Ranking
139

Overview

M.G. Colazo is affiliated with the Leduc Farm Animal Hospital in Canada and primarily focuses on research related to livestock, particularly dairy cattle. Their scholarly output encompasses a range of studies centered on reproductive physiology, genetics, nutrition, and animal health within agricultural and biological sciences.

The scientist's work spans several main fields:

  • Agricultural and Biological Sciences
  • Biochemistry, Genetics and Molecular Biology

Within these broader fields, their research emphasizes specific subfields including:

  • Agronomy and Crop Science
  • Genetics
  • Animal Science and Zoology
  • Small Animals
  • Public Health, Environmental and Occupational Health

The primary topics addressed in their research include:

  • Reproductive Physiology in Livestock
  • Genetic and phenotypic traits in livestock
  • Ruminant Nutrition and Digestive Physiology
  • Effects of Environmental Stressors on Livestock
  • Animal health and immunology
  • Reproductive Biology and Fertility
  • Animal Behavior and Welfare Studies

Recent publications reflect M.G. Colazo's focus on dairy cattle health and reproductive performance. Notable papers include:

  • Common and specific mineral and metabolic features in dairy cows with clinical metritis, hypocalcaemia or ketosis (2020), published in Research in Veterinary Science
  • Relationships between early postpartum nutritional and metabolic profiles and subsequent reproductive performance of lactating dairy cows (2020), published in Theriogenology
  • Performance and optimization of an ear tag automated activity monitor for estrus prediction in dairy heifers (2020), published in Theriogenology
  • Relationship of anogenital distance with fertility in nulliparous Holstein heifers (2021), published in Journal of Dairy Science
  • Genetic potential for residual feed intake and diet fed during early- to mid-gestation influences post-natal DNA methylation of imprinted genes in muscle and liver tissues in beef cattle (2021), published in Journal of Animal Science

The venues where M.G. Colazo routinely publishes demonstrate their involvement in key journals within animal science and veterinary research, including:

  • Theriogenology
  • Livestock Science
  • Research in Veterinary Science
  • Reproduction Fertility and Development
  • Journal of Animal Science

Frequent collaborators in their research include:

  • M. Gobikrushanth
  • K. Macmillan
  • A. Behrouzi
  • Graham Plastow
  • Carolyn Fitzsimmons

This network of co-authors indicates a focus on multi-disciplinary and collaborative approaches to advance understanding in reproductive physiology, genetics, and nutrition in livestock species. No awards or book publications have been reported in the available data.

Best Publications

  • Effects of estradiol cypionate (ECP) on ovarian follicular dynamics, synchrony of ovulation, and fertility in CIDR-based, fixed-time AI programs in beef heifers.

    Unknown

  • Residual feed intake adjusted for backfat thickness and feeding frequency is independent of fertility in beef heifers

    J. A. Basarab;M. G. Colazo;D. J. Ambrose;S. Novak

  • Diets enriched in unsaturated fatty acids enhance early embryonic development in lactating Holstein cows

    G. Thangavelu;M.G. Colazo;D.J. Ambrose;M. Oba

  • Fertility in beef cattle given a new or previously used CIDR insert and estradiol, with or without progesterone

    Unknown

  • Effects of progesterone presynchronization and eCG on pregnancy rates to GnRH-based, timed-AI in beef cattle

    J.A. Small;M.G. Colazo;J.P. Kastelic;R.J. Mapletoft

  • Effects of plasma progesterone concentrations on LH release and ovulation in beef cattle given GnRH.

    Unknown

  • A review of current timed-AI (TAI) programs for beef and dairy cattle.

    Unknown

  • Pregnancy rates to timed artificial insemination in dairy cows treated with gonadotropin-releasing hormone or porcine luteinizing hormone

    M.G. Colazo;M.B. Gordon;R. Rajamahendran;R.J. Mapletoft

  • Evidence of residual feed intake reranking in crossbred replacement heifers.

    O. N. Durunna;M. G. Colazo;D. J. Ambrose;D. McCartney

  • Progesterone concentration, estradiol pretreatment, and dose of gonadotropin-releasing hormone affect gonadotropin-releasing hormone-mediated luteinizing hormone release in beef heifers

    F.C.F. Dias;M.G. Colazo;J.P. Kastelic;R.J. Mapletoft

  • The use of controlled internal drug release devices for the regulation of bovine reproduction1

    Unknown

  • Fertility following fixed-time AI in CIDR-treated beef heifers given GnRH or estradiol cypionate and fed diets supplemented with flax seed or sunflower seed.

    Unknown

  • Effects of estradiol on gonadotrophin release, estrus and ovulation in CIDR-treated beef cattle

    Unknown

  • Neither duration of progesterone insert nor initial GnRH treatment affected pregnancy per timed-insemination in dairy heifers subjected to a Co-synch protocol

    M.G. Colazo;D.J. Ambrose

  • Progesterone supplementation before timed AI increased ovulation synchrony and pregnancy per AI, and supplementation after timed AI reduced pregnancy losses in lactating dairy cows

    Unknown

  • Effects of dose and route of administration of cloprostenol on luteolysis, estrus and ovulation in beef heifers.

    Unknown

  • Resynchronization of previously timed-inseminated beef heifers with progestins.

    M.G. Colazo;J.P. Kastelic;R.C. Mainar-Jaime;Q.A. Gavaga

  • Effect of estradiol valerate on ovarian follicle dynamics and superovulatory response in progestin-treated cattle.

    Unknown

  • Double-Ovsynch, compared with presynch with or without GnRH, improves fertility in heat-stressed lactating dairy cows

    Unknown

  • Reproductive performance of dairy cows is influenced by prepartum feed restriction and dietary fatty acid source

    Unknown

  • The relationship between serum anti-Müllerian hormone concentrations and fertility, and genome-wide associations for anti-Müllerian hormone in Holstein cows

    M. Gobikrushanth;D.C. Purfield;M.G. Colazo;S.T. Butler

  • Diameter of the ovulatory follicle at timed artificial insemination as a predictor of pregnancy status in lactating dairy cows subjected to GnRH-based protocols.

    M.G. Colazo;A. Behrouzi;D.J. Ambrose;R.J. Mapletoft

  • Categorization of endometritis and its association with ovarian follicular growth and ovulation, reproductive performance, dry matter intake, and milk yield in dairy cattle

    M. Gobikrushanth;R. Salehi;D.J. Ambrose;M.G. Colazo

  • Accuracy of a cow-side test for the diagnosis of hyperketonemia and hypoglycemia in lactating dairy cows.

    K. Macmillan;I. López Helguera;A. Behrouzi;M. Gobikrushanth

  • Evaluation of infrared thermography compared to rectal temperature to identify illness in early postpartum dairy cows.

    K. Macmillan;M.G. Colazo;N.J. Cook

  • Repeatability of antral follicle counts and anti-Müllerian hormone and their associations determined at an unknown stage of follicular growth and an expected day of follicular wave emergence in dairy cows.

    M. Gobikrushanth;P.A. Dutra;T.C. Bruinjé;M.G. Colazo

  • Characterization of anogenital distance and its relationship to fertility in lactating Holstein cows

    M. Gobikrushanth;T.C. Bruinjé;M.G. Colazo;S.T. Butler

  • Using in-line milk progesterone data to characterize parameters of luteal activity and their association with fertility in Holstein cows.

    T.C. Bruinjé;M.G. Colazo;E.S. Ribeiro;M. Gobikrushanth

  • Relationship between circulating progesterone at timed-AI and fertility in dairy cows subjected to GnRH-based protocols.

    M.G. Colazo;I. López Helguera;A. Behrouzi;D.J. Ambrose

  • Pregnancy per artificial insemination in lactating dairy cows subjected to 2 different intervals from presynchronization to initiation of Ovsynch protocol

    M.G. Colazo;P. Ponce-Barajas;D.J. Ambrose

  • Evaluation of a modified GnRH-based timed-AI protocol associated with estrus detection in beef heifers inseminated with sex-selected or conventional semen.

    M.G. Colazo;P. Whittaker;K. Macmillan;D. Bignell

  • Effects of exogenous progesterone and cloprostenol on ovarian follicular development and first ovulation in prepubertal heifers.

    L.F.M. Pfeifer;L.F.M. Pfeifer;L.G. Siqueira;R.J. Mapletoft;J.P. Kastelic

  • The factors associated with postpartum body condition score change and its relationship with serum analytes, milk production and reproductive performance in dairy cows

    M. Gobikrushanth;K. Macmillan;A. Behrouzi;B. Hoff

  • Dairy cows continuously-housed in tie-stalls failed to manifest activity changes during estrus

    C. A. Felton;M. G. Colazo;P. Ponce-Barajas;C. J. Bench

  • Effects of prepartum diets supplemented with rolled oilseeds on calf birth weight, postpartum health, feed intake, milk yield, and reproductive performance of dairy cows

    R. Salehi;M.G. Colazo;M. Oba;D.J. Ambrose

Frequent Co-Authors

John P. Kastelic
John P. Kastelic University of Calgary
Gregg P. Adams
Gregg P. Adams Western University of Health Sciences
Jaswant Singh
Jaswant Singh University of Saskatchewan
Masahito Oba
Masahito Oba University of Alberta
Burim N. Ametaj
Burim N. Ametaj University of Alberta
Ky G. Pohler
Ky G. Pohler Texas A&M University

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