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João Alberto Negrão

João Alberto Negrão

D-Index & Metrics

Animal Science and Veterinary

D-Index
24
Citations
1718
World Ranking
3036
National Ranking
156

Overview

João Alberto Negrão is affiliated with the Universidade de São Paulo in Brazil and has extensive research experience in Agricultural and Biological Sciences, with a particular focus on Animal Science and Zoology, Agronomy and Crop Science, Small Animals, Genetics, and Health, Toxicology and Mutagenesis. Their work covers a wide array of topics related to livestock, especially in response to environmental and physiological factors.

The scientist has contributed to studies in several main research areas, including:

  • Effects of Environmental Stressors on Livestock
  • Animal Behavior and Welfare Studies
  • Reproductive Physiology in Livestock
  • Genetic and phenotypic traits in livestock
  • Human-Animal Interaction Studies
  • Meat and Animal Product Quality
  • Thermoregulation and physiological responses

Negrão's recent publications demonstrate a consistent focus on physiological and behavioral responses of livestock to environmental and management factors. Notable papers include:

  • Heat stress affects the expression of key genes in the placenta, placental characteristics, and efficiency of Saanen goats and the survival and growth of their kids, 2021, Journal of Dairy Science
  • Effect of positive tactile stimulation and prepartum milking routine training on behavior, cortisol and oxytocin in milking, milk composition, and milk yield in Gyr cows in early lactation, 2020, Applied Animal Behaviour Science
  • Effect of high temperature on physiological parameters of Nelore (Bos taurus indicus) and Caracu (Bos taurus taurus) cattle breeds, 2020, Tropical Animal Health and Production
  • High body energy reserve influences extracellular vesicles miRNA contents within the ovarian follicle, 2023, PLoS ONE
  • Acute and chronic effects of cortisol on milk yield, the expression of key receptors, and apoptosis of mammary epithelial cells in Saanen goats, 2021, Journal of Dairy Science

Their frequent coauthors include Giovana Krempel Fonseca Merighe, S. A. de Oliveira, Priscila dos Santos Silva, Lenira El Faro, and Aska Ujita, indicating strong collaborative ties within the research community. Negrão's work is also regularly published in venues such as:

  • Animals
  • Journal of Dairy Science
  • Applied Animal Behaviour Science
  • PLoS ONE
  • Semina Ciências Agrárias

Overall, the scientist has advanced understanding in the physiological and behavioral adaptations of livestock, focusing on the impacts of thermal stress, reproductive biology, and animal welfare. Their contributions consist of empirical studies combining molecular, physiological, and behavioral approaches to address challenges in agricultural science and livestock management.

Best Publications

  • Cortisol in Saliva and Plasma of Cattle After ACTH Administration and Milking

    J.A. Negrão;M.A. Porcionato;A.M. de Passillé;J. Rushen

  • The effect of a mixed-management system on the release of oxytocin, prolactin, and cortisol in ewes during suckling and machine milking.

    Pierre-Guy Marnet;João Alberto Negrão

  • Effect of the establishment of dominance relationships on cortisol and other metabolic parameters in Nile tilapia (Oreochromis niloticus).

    S.A. Corrêa;M.O. Fernandes;K.K. Iseki;J.A. Negrão

  • Variação estacional dos hormônios tireoideanos e do cortisol em ovinos em ambiente tropical

    Josiane Maria Cardoso Starling;Roberto Gomes da Silva;João Alberto Negrão;Alex Sandro Campos Maia

  • Effect of milking frequency on oxytocin release and milk production in dairy ewes

    J.A Negrão;P.G Marnet;J Labussière

  • Monitoring ovarian cycles and pregnancy in brown brocket deer (Mazama gouazoubira) by measurement of fecal progesterone metabolites.

    Ricardo José Garcia Pereira;Bruna Furlan Polegato;Simone de Souza;João Alberto Negrão

  • Seasonal changes in fecal testosterone concentrations and their relationship to the reproductive behavior, antler cycle and grouping patterns in free-ranging male Pampas deer (Ozotoceros bezoarticus bezoarticus)

    Ricardo José Garcia Pereira;José Maurício Barbanti Duarte;João Alberto Negrão

  • Effects of environmental conditions, human activity, reproduction, antler cycle and grouping on fecal glucocorticoids of free-ranging Pampas deer stags (Ozotoceros bezoarticus bezoarticus)

    Ricardo José Garcia Pereira;José Maurício Barbanti Duarte;João Alberto Negrão

  • Label-free quantitative proteomic analysis reveals muscle contraction and metabolism proteins linked to ultimate pH in bovine skeletal muscle.

    Mirele Daiana Poleti;Cristina Tschorny Moncau;Bárbara Silva-Vignato;Alessandra Fernandes Rosa

  • Cortisol, adrenalin, noradrenalin and oxytocin release and milk yield during first milkings in primiparous ewes

    J.A. Negrão;P.-G. Marnet

  • Oxytocin release and milk ejection parameters during milking of dairy ewes in and out of natural season of lactation

    Unknown

  • Differential expression of heat shock protein genes associated with heat stress in Nelore and Caracu beef cattle

    B.V. Pires;N.B. Stafuzza;S.B.G.P.N.P. Lima;J.A. Negrão

  • Heat stress affects the expression of key genes in the placenta, placental characteristics, and efficiency of Saanen goats and the survival and growth of their kids.

    P.S. Silva;H.B. Hooper;E. Manica;G.K.F. Merighe

  • Milk yield, residual milk, oxytocin and cortisol release during machine milking in Gir, Gir × Holstein and Holstein cows

    João Alberto Negrão;Pierre-Guy Marnet

  • Effect of positive tactile stimulation and prepartum milking routine training on behavior, cortisol and oxytocin in milking, milk composition, and milk yield in Gyr cows in early lactation

    Aska Ujita;Lenira El Faro;Rogério Ribeiro Vicentini;Maria Lucia Pereira Lima

  • Heat stress and ACTH administration on cortisol and insulin-like growth factor I (IGF-I) levels in lactating Holstein cows

    Cristiane Gonçalves Titto;João Alberto Negrão;Taissa de Souza Canaes;Rafael Martins Titto

  • Residual feed intake and blood variables in young Nellore cattle.

    C. F. Nascimento;R. H. Branco;S. F. M. Bonilha;J. N. S. G. Cyrillo

  • Human–animal interaction, stress, and embryo production in Bos indicus embryo donors under tropical conditions

    Gustavo Guerino Macedo;Carmem Estefânia Serra Neto Zúccari;Urbano Gomes Pinto de Abreu;João Alberto Negrão

  • Effect of calf suckling on oxytocin, prolactin, growth hormone and milk yield in crossbred Gir x Holstein cows during milking.

    João Alberto Negrão;Pierre-Guy Marnet

  • Minor corral changes and adoption of good handling practices can improve the behavior and reduce cortisol release in Nellore cows.

    Maria Lúcia Pereira Lima;João Alberto Negrão;Claudia Cristina Paro de Paz;Temple Grandin

  • Effect of heat stress in late gestation on subsequent lactation performance and mammary cell gene expression of Saanen goats.

    H.B. Hooper;P. dos S. Silva;S.A. de Oliveira;G.K.F. Meringhe

  • Effect of acute stressors, adrenocorticotropic hormone administration, and cortisol release on milk yield, the expression of key genes, proliferation, and apoptosis in goat mammary epithelial cells.

    G.F. Bomfim;G.K.F. Merighe;S.A. de Oliveira;J.A. Negrao

Frequent Co-Authors

Ivanor Nunes do Prado
Ivanor Nunes do Prado State University of Maringa
Maria Eugênia Zerlotti Mercadante
Maria Eugênia Zerlotti Mercadante Institute of Animal Science and Pastures
Temple Grandin
Temple Grandin Colorado State University
Maurício Mello de Alencar
Maurício Mello de Alencar Brazilian Agricultural Research Corporation
José Maurício Barbanti Duarte
José Maurício Barbanti Duarte Sao Paulo State University
Telma Teresinha Berchielli
Telma Teresinha Berchielli Sao Paulo State University
Jeffrey Rushen
Jeffrey Rushen University of British Columbia
Gleidson Giordano Pinto de Carvalho
Gleidson Giordano Pinto de Carvalho Bahia Federal Institute of Education Science and Technology
Geraldo Tadeu dos Santos
Geraldo Tadeu dos Santos State University of Maringa
A.M. de Passillé
A.M. de Passillé University of British Columbia

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Related Online Degrees & Career Pathways

Pursuing a degree in Animal Science or Veterinary studies opens the door to a variety of related fields that expand career opportunities. For example, students interested in the behavioral aspects of animal care might explore roles similar to those in human counseling professions. Programs offering a substance abuse counselor degree online provide insights into mental health challenges, which can be relevant for holistic animal care approaches or community education roles.

For those drawn to therapeutic dynamics within families or groups, an online masters in marriage and family therapy offers valuable skills in communication and psychology that could augment animal science careers, especially in animal-assisted therapy.

Advanced practitioners may consider further specialization with a doctorate in counseling online to deepen their expertise in behavioral science, benefiting roles that require high levels of client interaction and care management.

Ultimately, exploring animal degrees broadly can guide students in selecting the best academic path aligned with their passion for animal welfare and industry demand.

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