Title
Effect of daily breeding on fertility of male alpaca
Date Issued
01 January 1997
Access level
metadata only access
Resource Type
journal article
Author(s)
Abstract
The effect of controlled daily breeding on the fertility of the male alpaca was evaluated. Sixteen adult male alpacas were divided into four groups for 1, 2, 3 and 5 daily breeding and for 9 consecutive days. Ovulation was determined by progesterone concentrations at day 7 after breeding. Pregnancy was determined by ultrasonography and concentrations of progesterone at day 20 after breeding. Altogether 333 females were bred. The overall fertility rate was 75% with no differences (P>0.05) between schedule of breeding; however, there was significant difference (P < 0.05) in the fertility rate between males with the highest fertile male being 100% and the lowest being 43%. In addition, the fertility of the males varied (P< 0.05) according to day of breeding, with a bi-modal higher fertility rate on days 5 and 9 (73.2 and 78.9%, respectively), in contrast to 43.2 on the first day. There was no difference (P < 0.05) in duration of copulation for females ovulating (13.9 minutes), and non-ovulating (16.2 minutes). Duration of copulation varied (P < 0.05) according to schedule of breeding, one breeding (16.2 min), two breeding (17.3 min), three breeding (15.4 min), and five breeding (11.4 min). A male alpaca may breed up to five times per day without compromising his fertility.
Start page
143
End page
153
Volume
9
Issue
February 1
Language
English
OCDE Knowledge area
Biología reproductiva
Ciencia veterinaria
Scopus EID
2-s2.0-0030734142
Source
Assisted Reproductive Technology/Andrology
ISSN of the container
10948465
Sources of information:
Directorio de Producción Científica
Scopus