RT Journal Article
T1 Photoperiod-treated bucks are equal to melatonin-treated bucks for inducing reproductive behaviour and physiological functions via the “male effect” in Mediterranean goats
A1 Zarazaga Garcés, Luis Ángel
A1 Gatica Jorquera, María Carolina
A1 Hernández, Horacio
A1 Chemineau, Philippe
A1 Delgadillo, J. A.
A1 Guzmán Guerrero, José Luis
AB The aim of this study was to examine whether photoperiod-treated bucks have the same capacityas melatonin-treated bucks to induce reproductive responses in female goats during the spring.On 10 April, 38 anoestrous does were placed with: 1) photoperiod-treated bucks (additional lighthours for 83 days from the end of the previous November; PHOTO; n=12); 2) bucks treated withexogenous melatonin at the beginning of March (MEL; n = 13); and 3) bucks that received notreatments (CONTROL; n = 13). The bucks' sexual behaviour was assessed for 10 days, and doeoestrous behaviour was recorded for the next 32 days by checking for harness marks. Ovulationwas confirmed from plasma progesterone concentration (measured twice per week) and ovulationrate was assessed by transrectal ultrasonography. Fecundity, fertility, prolificacy and productivitywere also determined. The percentage of does in the PHOTO, MEL and CONTROLgroup: 1) having ovulations was 92%, 100% and 38% respectively; 2) expressing behaviouraloestrous associated with ovulation was 92%, 100% and 31%; and 3) that became pregnant was75%, 69% and 23%, respectively. The kids produced per doe were 1.08 ± 0.23, 1.15 ± 0.25and 0.31 ± 0.17 for the PHOTO, MEL, and CONTROL groups, respectively with there being nodifferences between the PHOTO and MEL groups, however, there was a difference (P < 0.05)between PHOTO/MEL and CONTROL groups. Thus, imposing a stimulatory lighting regimenduring the preceding winter period is as efficient as using subcutaneous melatonin implants instimulating reproductive behaviours and physiological functions of bucks.
SN 0378-4320
YR 2019
FD 2019-01-30
LK http://hdl.handle.net/10272/19779
UL http://hdl.handle.net/10272/19779
LA eng
NO Zarazaga, L. A., Gatica, M. C., Hernández, H., Chemineau, P., Delgadillo, J. A., & Guzmán, J. L. (2019). Photoperiod-treated bucks are equal to melatonin-treated bucks for inducing reproductive behaviour and physiological functions via the “male effect” in Mediterranean goats. Animal Reproduction Science, 202, 58–64. https://doi.org/10.1016/j.anireprosci.2019.01.008
NO This study was funded by Grant AGL2016-75848-R from MINECO-AEI-FEDER (Spain)This study was funded by Grant AGL2016-75848-R from MINECO-AEI-FEDER (Spain).
DS Repositorio Institucional de la Universidad de Huelva
RD 30 may 2026