The effect of flushing and stimulus of estrogenized does on reproductive performance of anovulatory-range goats

Abstract

This study was conducted to determine whether flushing or the stimulus of estrogenized goats is necessary to achieve a high reproductive response in anestrous goats on rangeland. Does were feed-supplemented on rangeland (flushed, n = 20). Other group was exposed to estrogenized does during the mating period (stimulated, n = 20). A third group was both supplemented and stimulated (stimulated-flushed, n = 20) and other group grazed on rangeland only (control, n = 18). More goats in the stimulated and stimulated-flushed groups showed estrus during the first 5 days of joining (45% and 60%, respectively) than the control and flushed groups (11% and 5%, respectively; P < 0.05). Flushing did not improve prolificacy and reduced (P < 0.05) kidding rates (40% and 35% for the flushed and stimulated-flushed groups, respectively) compared to 67% and 55% for the control and stimulated groups, respectively. This experiment demonstrates potential shortcomings of use of flushing in range goats with inadequate nutrition during gestation.

SPECIAL TOPICS — Mitigation of methane and nitrous oxide emissions from animal operations: III. A review of animal management mitigation options1

“…The combined use of early introduction of males and flushing increased the number of females conceiving early in the breeding season. However, effects reported by others have been variable (De Santiago-Miramontes et al, 2011). These strategies are most effective when the animals are not overly fat (e.g., are thin).…”

Seminal characteristics, libido and serum testosterone concentrations in mixed-breed goat bucks receiving testosterone during the non-breeding period

“…At this latitude, goats present sexual activity for the most part of the year, but during April and May goats present anestrous (De Santiago-Miramontes et al 2011). As a consequence, very few kids are likely to be born from mid-August through mid-September making it difficult for goat producers to provide a constant supply of goat milk and meat throughout the year.…”

Effect of Rice Wine Distillers By-Product on Digestibility and Nitrogen Retention in Pre-Pregnant Bach Thao Goats

“…In our experience, the combined use of early introduction of males and flushing has been effective in increasing the number of females conceiving early in the breeding season. However, effects reported by others have been variable (De Santiago-Miramontes et al, 2011). These strategies are most effective when the animals are not already in good body condition (e.g.…”