Long-day photoperiod exposure in lactating goats to induce post-partum ovulatory activity

Flores, Maximino Luna; Flores, Jerónimo Landeros; Duarte, Gerardo; Vielma, Jesús; Delgadillo, J.A.; Hernández, H.

doi:10.1016/j.smallrumres.2012.07.027

Cited by 4 publications

(6 citation statements)

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“…Interestingly, Flores et al. () reported that approximately 60% of lactating goats ovulated spontaneously after 160 days of continuous exposition to artificial long days. In this case, the spontaneous reoccurrence of ovulation was attributed to the appearance of a refractory state to artificial long days (Maeda et al., ).…”

Section: Discussionmentioning

confidence: 99%

“…When goats start their lactation in November, they remained anovulatory due to an interaction between lactation and the closeness to seasonal anestrus (Flores et al, 2013). Interestingly, when lactating ewes or goats were exposed to artificial long-day treatments during the first 75 days of lactation, a complete inhibition in post-partum ovulatory activity was induced (Bocquier, Kann, & Thimonier, 1993).…”

Section: Contentsmentioning

confidence: 99%

“…The present results confirm that a male effect using photostimulated males can break the anovulatory state of the lactating goats either during natural anestrus season (as the control group) or in females maintained anovulatory due prolonged exposition to artificial long days (as the treated group). Interestingly, Flores et al (2013) reported that approximately 60% of lactating goats ovulated spontaneously after 160 days of continuous exposition to artificial long days. In this case, the spontaneous reoccurrence of ovulation was attributed to the appearance of a refractory state to artificial long days (Maeda et al, 1988).…”

Section: Sexual Response To Male Effect In Control and Treated Goatsmentioning

confidence: 99%

“…In goats, Garcia‐Hernandez, Newton, Horner, and Nuti () reported that exposure to a photoperiod consisting in 20 hr light and 4 hr of darkness was effective to increase the milk yield. In subtropical goats that gave birth during autumn, several studies demonstrated that exposition to artificial long days consisting of 16 hr light and 8 hr darkness increased by 21% the milk yield compared with animals under natural decreasing days (Flores et al., , , ; Hernández et al., ). However, in these animals, it remains unknown if reducing the exposure from 16 to 14 hr of light/day can be effective to stimulate milk production, like reported previously that this light regime inhibits ovulation (Duarte et al., ).…”

Section: Introductionmentioning

confidence: 99%

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Subtropical goats ovulate in response to the male effect after a prolonged treatment of artificial long days to stimulate their milk yield

Mendieta

Delgadillo

Flores

et al. 2018

Reprod Domestic Animals

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The objectives of this study were to determine (i) if in subtropical goats that gave birth during mid-December, the exposition to an artificial long-day photoperiod consisting in only 14 hr of light per day can increase the milk yield and (ii) to test whether these females can respond to the male effect at the end of the prolonged photoperiodic treatment. In experiment 1, 17 lactating goats were maintained under natural short days (control group), while another 22 goats were maintained under artificial long days (treated group) consisting in 14 hr light and 10 hr darkness starting at day 10 of lactation. The continuous exposition to an artificial long-day photoperiod produced an increase in the milk yield level during the first 110 days of lactation (time × treatment interaction; p = .01), while none of the milk components were modified due to the photoperiodic treatment (p > .05). In experiment 2, all control and treated anovulatory goats were submitted to the male effect using photostimulated males. All females showed oestrous behaviour within the first 10 days that were in contact with males (100% in both groups; p > .05). Thus, the latency to onset of oestrus did not differ between females from control (58.2 ± 3.0 hr) and treated (62 ± 4.6 hr) groups. Male exposition provoked ovulation independently if females were previously under long days or natural photoperiod (96 vs 100%, respectively; p = .79). It was concluded that exposure to 14 hr of light per day in subtropical goats that gave birth in late autumn stimulates milk yield without preventing the ovulation in response to the male effect at the end of the prolonged photoperiodic treatment.

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Section: Discussionmentioning

confidence: 99%

Section: Contentsmentioning

confidence: 99%

Section: Sexual Response To Male Effect In Control and Treated Goatsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Subtropical goats ovulate in response to the male effect after a prolonged treatment of artificial long days to stimulate their milk yield

Mendieta

Delgadillo

Flores

et al. 2018

Reprod Domestic Animals

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“…Central to the evolution of photoperiodism in animals is the adaptive distribution of energetically challenging activities across the year to optimize reproductive fitness while balancing the energetic tradeoffs necessary for seasonally-appropriate survival strategies (Walton et al 2011). Photoperiod, where changes in day length that was known to influence the onset of puberty (Valasi et al 2012;Flores et al 2013) were also known to control signals for seasonal breeding rhythms for goats in temperate regions or in sub-tropical areas (Carrillo et al 2010;Flores et al 2013). Therefore, setting a breeding plan that suited the time of breeding of goats in a temperate climate, optimised the service per conception to around 1 to 2 (Mellado et al 2000b).…”

Section: Kidding Interval (Parturition Interval)mentioning

confidence: 99%

Improvement of rearing goats in Bali Province, Indonesia

Doloksaribu¹

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i AbstractLack of baseline quantitative data on the reproductive and productive performance of goats in Bali Province has limited our ability to identify factors that could lead to their improvement. This study aimed to rectify this lack of data and to measure constraints to, challenges of, and opportunities for improving goat production in Bali, through a hybrid method of Strengths, Weaknesses, Opportunities and Threats and Analytic Hierarchy Process analyses.Data was collected through direct observations, structured formal household interviews, key informant interviews, focus group discussions, and case studies as well as from the surrounding environment and market assessments from January to September 2014. This involved interviewing 175 households with 2,017 goats. Of these, 63 households with 1,169 goats were in Rendang District, Karangasem Regency; 44 households with 590 goats were in Banjar, Busungbiu and Grogak Districts in Buleleng Regency; and 68 households with 258 goats were in Mendoyo District, Jembrana Regency. Data was analysed by using descriptive statistics, correlate bivariate and general linear model multivariate using SPSS version 24.Results revealed that households had an average of 2.3 labourers with a ratio of 5.2 ± 0.4 goats per labourer who were aged 42 ± 1 year. This indicated that household labourers in Bali Province worked 412 ± 9.9 hours/household/year to look after 11.5 ± 0.9 goats/flock in either battery or colony housing with a cut and carry feeding system. Farmers cultivated on average 1.4 ± 0.05 ha/household with vegetables or commodity plantations integrated with goat rearing for 10.5 ± 0.7 years. Of the 175 farmers, 63%, 21% and 15% of farmers graduated from Grades 6, 9 and 12, respectively, and only one farmer graduated from university. This study generated new, important and detailed information on goat production by smallholder farmers in Bali Province. Suggested ways to improve goat production included: High performance (as indicated by GM/doe) was associated with a higher turn off rate (underpinned by a higher reproductive rate); Organic goat rearing management in Rendang District was a model for Bali; The ideal labourer to goat flock size ratio was 1:20 goats; At least 25% of the flock should be does, with a 75% annual turn off rate; The kidding interval should be 8 months; Does should only be kept up to their fourth or fifth kidding; Farmers need to keep records of their goats; A -One gate marketing system‖ should be used to maintain profitable market prices; and  Farmers needed networks with the Indonesia Research Institute for Animal Production to ensure quality breeds, feeds and efficient rearing goat management systems were used in Bali.

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Use of two cloprostenol administrations 11.5 days apart efficiently synchronizes oestrus in photostimulated multiparous dairy goats in the non‐breeding season

Netto

Balaro

Cosentino

et al. 2020

Reprod Domestic Animals

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This study assessed the efficiency of synchronous oestrous induction by light programme followed by two doses of cloprostenol in acyclic Saanen goats of different parity orders. Primiparous (n = 22) and multiparous (n = 33) goats were subjected to 16 hr of light and 8 hr of darkness for 60 days (D0‐D60), starting 10 days after the winter solstice. All goats received 120 µg cloprostenol doses on D130 (morning) and D141.5 (afternoon) (11.5 days apart). Oestrus behaviour, ovarian follicular dynamics and serum progesterone (P4) analyses were recorded from D0 to D174 at different intervals. Animals in oestrus after D141.5 were randomly assigned into two groups: assisted natural mating (NM) or artificial insemination (AI; 10–24 hr after oestrus onset with frozen‐thawed semen). From D57 to D120, 89.0% of goats presented large follicles (5–8 mm) and P4 concentrations were subluteal from D0 to D120. More multiparous compared to primiparous goats (54.5%, 18/33 vs. 18.2%, 4/22) exhibited oestrus after both injections. More primiparous compared to multiparous goats (54.5%, 12/22 vs. 12.1%, 4/33) did not exhibit oestrus after any injection. A total of 35 goats (64%) were in oestrus after the second prostaglandin injection and were subjected to NM or AI. The conception rate was similar among primiparous (70.0%, 7/10) and multiparous (68.0%, 17/25) goats but the pregnancy rate differed, being 31.8% (7/22) and 51.5% (17/33), respectively. No interaction was found between parity order and P4 concentrations in does that became pregnant or not. Thus, the association between light programme (60 days, starting at the beginning of winter) and two cloprostenol administrations 11.5 days apart (starting 70 days after the end of the light treatment) resulted in sufficient synchronous oestrous response in multiparous acyclic Saanen goats to reach satisfactory fertility levels after both NM and AI.

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Long-day photoperiod exposure in lactating goats to induce post-partum ovulatory activity

Cited by 4 publications

References 9 publications

Subtropical goats ovulate in response to the male effect after a prolonged treatment of artificial long days to stimulate their milk yield

Subtropical goats ovulate in response to the male effect after a prolonged treatment of artificial long days to stimulate their milk yield

Improvement of rearing goats in Bali Province, Indonesia

Use of two cloprostenol administrations 11.5 days apart efficiently synchronizes oestrus in photostimulated multiparous dairy goats in the non‐breeding season

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