Artículo
Photoperiod-Treatment in Mediterranean Bucks Can Improve the Reproductive Performance of the Male Effect Depending on the Extent of Their Seasonality
Autor/es | Zarazaga Garcés, Luis Ángel
Gatica, María Carolina Delgado Pertíñez, Manuel ![]() ![]() ![]() ![]() ![]() ![]() ![]() Hernández, Horacio Guzmán, José Luis Delgadillo, José Alberto |
Departamento | Universidad de Sevilla. Departamento de Agronomía |
Fecha de publicación | 2021 |
Fecha de depósito | 2022-07-08 |
Publicado en |
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Resumen | This study examines the effectiveness of the photoperiod treatment (extra light for 88 days)
to render the bucks sexually active during the seasonal anoestrous in order to induce a male effect,
depending on the reproductive ... This study examines the effectiveness of the photoperiod treatment (extra light for 88 days) to render the bucks sexually active during the seasonal anoestrous in order to induce a male effect, depending on the reproductive seasonality of the breed of the bucks used. In April, 57 anoestrous Blanca Andaluza does were distributed into four groups with three males each: 13 were exposed to control Murciano–Granadina bucks (lower seasonality); 15 were exposed to photostimulated Murciano–Granadina bucks; 14 were exposed to control Blanca Andaluza bucks (higher seasonality), and 15 were exposed to photostimulated Blanca Andaluza bucks. After male introduction, the sexual behaviour of the bucks was assessed, and harness marks recorded doe oestrous behaviour. Ovulation was confirmed from plasma progesterone, and the ovulation rate was assessed by transrectal ultra sonography. Fecundity, fertility, prolificacy and productivity were also determined. All of the does in all of the groups showed ovulation. Interaction between both sources of variation was observed: the percentage of females showing oestrous (p < 0.01) and productivity (p < 0.05) was the lowest in the Blanca Andaluza control group (50% and 0.36 ± 0.17 goat kids born/female, respectively). In conclusion, photoperiod-treated bucks efficiently induce a male effect, but photostimulation could be more necessary for breeds with deep seasonality. |
Cita | Zarazaga Garcés, L.Á., Gatica, M.C., Delgado Pertíñez, M., Hernández, H., Guzmán, J.L. y Delgadillo, J.A. (2021). Photoperiod-Treatment in Mediterranean Bucks Can Improve the Reproductive Performance of the Male Effect Depending on the Extent of Their Seasonality. Animals, 2021 (11) (2021 (400)), 1 p.-12 p.. |
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