Short communication: reproductive response to concentrate supplementation of mixed-breed goats on rangeland

Mellado, Miguel; Rodríguez, Iris J.; Alvarado-Espino, A.S.; Véliz, Francisco Gerardo; Mellado, Jesús; García, José Eduardo

doi:10.1007/s11250-020-02264-z

Cited by 13 publications

(10 citation statements)

References 18 publications

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“…When serum glucose concentration decreases, it signifies a lack of dietary energy or poor energy utilisation [ 33 ]. There was a positive effect of concentrate supplementation on the serum concentration of GLU as we expected, which has also reported in goats supplemented with concentrate [ 34 ]. This was likely due to the concentrate supplementation providing more dietary energy supply.…”

Section: Discussionsupporting

confidence: 88%

Effects of Concentrate Supplementation on Growth Performance, Rumen Fermentation, and Bacterial Community Composition in Grazing Yaks during the Warm Season

Dai

Pang

Liu

et al. 2022

Animals

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This study aimed to evaluate the effects of concentrate supplementation on the growth performance, serum biochemical parameters, rumen fermentation, and bacterial community composition of grazing yaks during the warm season. Eight male yaks (body weight, 123.96 ± 7.43 kg; 3-years) were randomly allocated to two treatments groups: grazing (n = 4, GY) and concentrate supplement group (n = 4, GYS). Concentrate supplementation increased the average daily gain (ADG) (p < 0.05). Glucose (GLU), total protein (TP), and aspartate aminotransferase (AST) serum concentrations were significantly higher in the GYS group than in the GY group (p < 0.05). Ammonia-N, MCP: microbial protein, and total volatile fatty acid concentrations were significantly higher in the GYS group than in the GY group (p < 0.01), whereas the pH and acetate: propionate values were significantly decreased (p < 0.01). The relative abundance of Firmicutes in the rumen fluid was significantly higher in the GYS group than in the GY group (p < 0.01). At the genus level, the relative abundances of Succiniclasticum, Prevotellaceae_UCG_003, Prevotellaceae_UCG_005, and Ruminococcus_1 were significantly greater in the GY group than in the GYS group (p <0.01). In conclusion, concentrate supplementation improved yaks’ growth potential during the warm season, improved ruminal fermentation, and altered core bacteria abundance.

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Section: Discussionsupporting

confidence: 88%

Effects of Concentrate Supplementation on Growth Performance, Rumen Fermentation, and Bacterial Community Composition in Grazing Yaks during the Warm Season

Dai

Pang

Liu

et al. 2022

Animals

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“…Yet, low birth weight reduced growth performance, thus resulting in low meat potential (yield and quality) and low market-selling weight [54][55][56]. Nevertheless, goats on rangeland during the dry season should receive a nutritional supplement to ensure sufficient milk yield for their kids and to reach an adequate market weight of kids [57].…”

Section: Discussionmentioning

confidence: 99%

Milk Yield and Composition of Mixed-Breed Goats on Rangeland during the Dry Season and the Effect on the Growth of Their Progeny

Flores-Najera

Reyes

Vázquez-García

et al. 2021

Biology

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We tested whether the milk yield capacity of mixed-breed goats on a Chihuahuan desert rangeland in northern Mexico during the dry season affects milk composition, body weight gain, and weaning weight of their progeny. Milk yield and composition, and progeny postnatal growth performance, were recorded weekly. One week after kidding, mixed-breed goats (a mixture of Criollo × dairy breeds; n = 40) were allotted into medium (MP) or low (LP) milk yielding groups (20 goats per group). Mean 105-d total milk yield for MP and LP goats was 45.2 ± 12.5 and 20.7 ± 5.2 L, respectively. Milk lactose (4.3 vs. 4.2%) and solids-non-fat (SNF; 8.2 vs. 8.0) differed (p < 0.05) between MP and LP goats; milk protein content tended to differ (p = 0.08) between MP and LP goats with no difference for milk fat content (p > 0.05). Maternal body weight was positively associated with milk yield, milk lactose, and SNF content (p < 0.05 to p < 0.001). Goats giving birth to males produce more milk than goats giving birth to females, but milk fat percentage was higher in goats bearing females (p < 0.001). Milk yield and composition throughout lactation did not influence body weight gain (47.8 vs. 48.7 g/day for kids from MP and LP goats) and weaning weight (6.7 vs. 6.7 kg from MP and LP goats) of the offspring (p > 0.05). Birth weight and weaning weight of the progeny were positively related to maternal body weight (p ≤ 0.05). The postnatal growth of the kids was reduced, extending the time to reach market weight. Nevertheless, non-supplemented mixed-breed goats reared on semi-arid rangeland of northern Mexico have the potential for moderate milk production. Therefore, due to the limited nutrients ingested by grazing goats during the dry season, a nutritional supplement is necessary to keep up milk production and adequate growth of kids.

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“…Under extensive management conditions like those observed in northern Mexico, low reproductive rates are common (Mellado et al 2020). In this kind of marginal goat production system goats are prone to get a low plane of nutrition that may negatively impact their fertility (Meza-Herrera et al 2017;Alvarado-Espino et al 2019b;Mellado et al 2020). Although breed could be a factor that influences fertility rate, a previous study shows that the treatment used here induces a similar estrous response and ovarian activity in crossbreed and dairy goats (Alvarado-Espino et al2019a).…”

Section: Resultsmentioning

confidence: 73%

“…These results are in line with those previously reported in goats in which there was imposing the same estrus synchrony treatment (Carrillo et al 2019;Alvarado-Espino et al 2019a) or after treatment with intravaginal sponges and eCG inseminated with fresh or cooled extended semen under extensive or semi-extensive management conditions (Mehmood et al 2011;Arrebola et al 2012;Muayad et al 2019). Under extensive management conditions like those observed in northern Mexico, low reproductive rates are common (Mellado et al 2020). In this kind of marginal goat production system goats are prone to get a low plane of nutrition that may negatively impact their fertility (Meza-Herrera et al 2017;Alvarado-Espino et al 2019b;Mellado et al 2020).…”

Section: Resultsmentioning

confidence: 99%

The Time of Artificial Insemination with Cooled Semen does not Affect the Pregnancy Rate in Anestrous Goats

Alvarado-Espino

Arellano-Rodríguez

et al. 2022

IJAR

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Background: The time of artificial insemination (AI) concerning ovulation is one of the main factors that affect the pregnancy rate. This study aimed to compare the time of AI with cooled semen in anestrous goats treated with progesterone (P4) plus hCG-based protocol and the effect of management condition on pregnancy rate. Methods: Forty-nine crossbred (local x dairy goats) and thirty-nine Alpine anestrous multiparous goats managed under extensive and intensive production systems respectively, were used (June, 25°N). Goats were treated with 20 mg of P4 followed by 100 IU of hCG 24 h later. On the day of hCG administration (Day 0), goats in each management system were allocated randomly to each of the two treatment groups. Goats in the first group received a fixed-time AI (FTAI) at 48 and 60 h after hCG whereas goats of the second group received a FTAI at 60 and 72 h with cooled semen. Goats were examined by transrectal ultrasonography (7.5 MHz) 45 days after AI to determine the pregnancy rate. Result: There was no significant difference in pregnant goats inseminated at 48 and 60 h (46.8%, 22/47) or 60 and 72 h (46.3%, 19/41) after hCG administration (P greater than 0.05). There was a tendency for a higher pregnancy rate in intensive compared to extensive management conditions (P=0.09) and no interaction was detected between the time of insemination and the management condition system (P greater than 0.05).

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Short communication: reproductive response to concentrate supplementation of mixed-breed goats on rangeland

Cited by 13 publications

References 18 publications

Effects of Concentrate Supplementation on Growth Performance, Rumen Fermentation, and Bacterial Community Composition in Grazing Yaks during the Warm Season

Effects of Concentrate Supplementation on Growth Performance, Rumen Fermentation, and Bacterial Community Composition in Grazing Yaks during the Warm Season

Milk Yield and Composition of Mixed-Breed Goats on Rangeland during the Dry Season and the Effect on the Growth of Their Progeny

The Time of Artificial Insemination with Cooled Semen does not Affect the Pregnancy Rate in Anestrous Goats

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