Effect of supplemental nutrition around lambing on hair sheep ewes and lambs during the dry and wet seasons in the U.S. Virgin Islands1

Godfrey, R. W.; Dodson, R. E.

doi:10.2527/2003.813587x

Cited by 27 publications

(18 citation statements)

References 6 publications

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“…Pérez-Hernández et al (2009) and Morales-Terán et al (2011) mention that females spending all day with their lambs tend to lose more weight than those who have controlled suckling, due to a greater synthesis of milk at the expense of their body reserves. Godfrey & Dodson (2003) mention that weight loss during lactation limits the reestablishment of cycling in females, which is why poor body condition prolongs the post-partum interval. Castillo-Maldonado et al (2013) report that in females whose nutritional requirements were covered, there were no significant differences between body weights in continuous and controlled suckling groups.…”

Section: Discussionmentioning

confidence: 99%

External stimuli help restore post-partum ovarian activity in Pelibuey sheep

Fraire-Cordero¹,

Salazar-Ortiz²,

Cortez‐Romero³

et al. 2018

SA J. An. Sci.

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Post-partum anestrus is a problem on farms, and its duration depends on the frequency and intensity of suckling which affects reproduction and production efficiency to become a determining economic factor. The aim of this study was to determine the post-partum reproductive response in ewe to a "male effect" with an ovulation induction protocol of five days using progesterone and the application of a metabolic restorative (MR; Metabolase ®). One hundred and twenty females were randomly assigned to one of four treatments: T1: Continuous suckling (CS; n = 29), T2: CS + MR (n = 29), T3: CS + Male Effect (ME; n = 32), and T4: CS + MR + ME. The percentage of females in ovulation, weight changes among females and lambs, the onset of estrus, calving, fecundity, and prolificacy were also determined. The ovulation percentage was higher in CS + ME and CS + MR + ME (75.0 and 73.3%) than in the other treatments. Weight changes in females and lambs were different among periods. The onset of estrus was similar for CS and CS + MR (25.9 ± 1.9 and 25.7 ± 0.7 h, respectively). The calving percentage was higher for CS + MR (86.2%) than other treatments. Male presence positively affected the postpartum cyclic ovarian re-establishment and the metabolic restorative could even improve the fertility of hair ewes in continuous suckling with similar hormone protocol. ______________________________________________________________________________________

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Section: Discussionmentioning

confidence: 99%

External stimuli help restore post-partum ovarian activity in Pelibuey sheep

Fraire-Cordero¹,

Salazar-Ortiz²,

Cortez‐Romero³

et al. 2018

SA J. An. Sci.

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“…During summer, the shortest interval to estrus occurred when rainfall was greater than 200 mm, possibly being related to a better food quality. Godfrey and Dodson (2003) reported a shorter postpartum interval to estrus during the wet season, in which ewes received 10.1% CP food, than in the dry season (8.4% CP).…”

Section: Discussionmentioning

confidence: 89%

“…It has been reported that hair sheep can breed throughout the year at 17°N (Atti et al 2001;Wildeus 2005), although at latitudes higher than 25°, the incidence of estrus decreases during spring and increases again during late summer and autumn (Godfrey and Dodson 2003;Godfrey 2005;Wildeus 2005). According to individual differences in the reproductive activity throughout the year, some animals may still be sexually active during the otherwise conventional nonbreeding season.…”

Section: Introductionmentioning

confidence: 96%

Environmental factors and interval from the introduction of rams to estrus in postpartum Saint Croix sheep

Sánchez-Dávila

Bernal²,

Colín³

et al. 2011

Trop Anim Health Prod

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The objective of this study was to determine whether season and total rainfall during the breeding season, sheep parity, and/or litter size affect the interval from the introduction of rams to estrus (IRE) in hair Saint Croix sheep in northeastern Mexico. An analysis was made of 874 services performed during 9 years, introducing the rams into the sheep flock after an isolation period of 60 days during the postpartum period. Estrus was recorded twice daily during 35 days. Year and season influenced significantly on the interval between ram introduction and estrus length (P < 0.01). Winter IRE length (7.9 ± 0.1 days) was shorter than in the other three seasons (11.1 ± 0.2, 11.1 ± 0.1, and 16.2 ± 0.2 days in summer, autumn, and spring, respectively) (P < 0.01). An interaction was observed between rainfall and season, then by rainfall between 0 and 100 mm, IRE was shorter (P < 0.05) in winter (6.8 ± 0.3 days), and by rainfall between 100 and 199 mm, IRE was shorter (P < 0.05) in autumn (10.2 ± 0.5 days); however, when rainfall was beyond 200 mm, IRE length was shorter (P < 0.01) in summer (4.8 ± 0.5 days) than in autumn (14.5 ± 0.3 days). The IRE length was also longer in first lambing ewes (P < 0.05) and was not affected by litter size. In the present study, several factors, including the breeding season, rainfall and parity, directly influenced the interval between the male introduction and the onset of estrus by Saint Croix hair sheep.

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“…This is in compliance with the results obtained by Son et al (1994), who reported similar live weight gain for ewes supplemented with 40 g or less of calcium salt protected fatty acids in post-lambig. However, Appeddu et al (2004) and Godfrey & Dodson (2003) found a decrease on ewes live weight supplemented with protected fat in comparison to the control diet.…”

Section: Resultsmentioning

confidence: 99%

Reproductive performance of Santa Inês ewes fed protected fat diet

Costa

Fontes

Cunha

et al. 2011

Pesq. agropec. bras.

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-The objective of this work was to evaluate the reproductive performance of Santa Inês ewes fed a diet supplemented with protected fat. Intervals from lambing to first clinical estrus and to conception, conception rate, prolificacy, live weight and body condition were determined. After lambing, 60 ewes and their offsprings were weighted and randomly assigned to three treatments, based on age, body weight and number of born lambs. Treatments consisted of: control diet, or control diet plus 30 g of protected fat, from lambing to day 25 of post-lambing (Sup25), or to day 60 of post-lambing (Sup60). Out of 60 evaluated ewes, 93.3% returned to estrus, and 74.5% got pregnant, with 73.53% lambing rate and 196.5 days lambing interval. The average periods from lambing to first estrus were 32.4, 27.2 and 35.5 days for ewes fed the control diet, Sup25, and Sup60, respectively. The intervals from lambing to conception were 45.2, 46.5 and 45.2 days, and the supplemented diets did not show differences in comparison to the control diet. Supplementation with protected fat to well-nourished Santa Inês ewes does not improve their reproductive performance.Index terms: Ovis aries, conception rate, estrus, lambing interval, nutrition. Desempenho reprodutivo de ovelhas Santa Inês alimentadas com dieta com gordura protegidaResumo -O objetivo deste trabalho foi avaliar o desempenho reprodutivo de ovelhas Santa Inês alimentadas com dieta suplementada com gordura protegida. Os intervalos do parto ao primeiro estro clínico e à concepção, a taxa de gestação, a prolificidade, o peso vivo e a condição corporal foram determinados. Depois do parto, 60 ovelhas e seus cordeiros foram pesados e distribuídos aleatoriamente em três tratamentos com base na idade, peso corporal e número de cordeiros nascidos. Os tratamentos consistiram de dieta controle ou da dieta controle mais 30 g de gordura protegida, do parto aos 25 dias pós-parto (Sup25), ou aos 60 dias pós-parto (Sup60). Das 60 ovelhas avaliadas, 93,3% retornaram ao estro, e 74,5% ficaram prenhes, com taxa de parição de 73,53% e intervalo de parto de 196,5 dias. O período médio do parto até o primeiro estro foi de 32,4, 27,2 e 35,5 dias, para as ovelhas alimentadas com a dieta controle, Sup25 e Sup60, respectivamente. Os intervalos do parto até a concepção foram de 45,2, 46,5 e 45,2 dias, e as dietas com suplementação não apresentaram diferenças em comparação ao tratamento controle. A suplementação com gordura protegida para ovelhas da raça Santa Inês, bem nutridas, não melhora seu desempenho reprodutivo.Termos para indexação: Ovis aries, taxa de concepção, estro, intervalo de parto, nutrição.

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Effect of supplemental nutrition around lambing on hair sheep ewes and lambs during the dry and wet seasons in the U.S. Virgin Islands1

Cited by 27 publications

References 6 publications

External stimuli help restore post-partum ovarian activity in Pelibuey sheep

External stimuli help restore post-partum ovarian activity in Pelibuey sheep

Environmental factors and interval from the introduction of rams to estrus in postpartum Saint Croix sheep

Reproductive performance of Santa Inês ewes fed protected fat diet

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