Environmental effects and repeatability of the follicular diameter in mares
Título del documento: Environmental effects and repeatability of the follicular diameter in mares
Revista: Revista Brasileira de Zootecnia
Base de datos: PERIÓDICA
Número de sistema: 000444276
ISSN: 1516-3598
Autores: 1
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Instituciones: 1Universidade Estadual do Norte Fluminense, Laboratorio de Reproducao e Melhoramento Genetico Animal, Campos dos Goytacazes, Rio de Janeiro. Brasil
Año:
Volumen: 48
País: Brasil
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Analítico, descriptivo
Resumen en inglés The objective of this study was to evaluate the effect of environment on follicular diameter and repeatability of the size of preovulatory follicles of mares. Temperature, rainfall, and photoperiod were measured, and their effects were evaluated on follicular dynamics. Data were studied by analysis of variance of follicular size and environment traits. During the five years, 7% double ovulations and 159 anovulatory follicles were recorded. Mean preovulatory follicle diameters of left and right ovaries were 39.3±3.8 and 39.2±3.5 mm respectively. There was no effect of evaluation year on follicular diameter. Reproduction season affected the right preovulatory follicle diameter. There was no effect of temperature and rainfall on follicular diameter. Repeatability values of the preovulatory follicular diameter were low. In the subtropical climate studied, temperature and rainfall caused no effect on follicular dynamics, and photoperiod had only a small effect on dominant preovulatory follicular diameter. Repeatability of follicular diameter was low, so this characteristic should be evaluated daily to predict ovulation and the optimal time to inseminate mares
Disciplinas: Medicina veterinaria y zootecnia
Palabras clave: Equinos,
Reproducción,
Yeguas,
Medio ambiente
Keyword: Equines,
Reproduction,
Mares,
Environment
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