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  1. Article ; Online: Milk Yield and Composition of Mixed-Breed Goats on Rangeland during the Dry Season and the Effect on the Growth of Their Progeny

    Manuel J. Flores-Najera / Venancio Cuevas-Reyes / Juan M. Vázquez-García / Sergio Beltrán-López / César A. Meza-Herrera / Miguel Mellado / Luis O. Negrete-Sánchez / Marco A. Rivas-Jacobo / Cesar A. Rosales-Nieto

    Biology, Vol 10, Iss 220, p

    2021  Volume 220

    Abstract: 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 ... ...

    Abstract 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.
    Keywords milk composition ; milk yield ; bodyweight gain ; weaning weight ; Biology (General) ; QH301-705.5
    Subject code 630
    Language English
    Publishing date 2021-03-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Methionine Supplementation during Pregnancy of Goats Improves Kids’ Birth Weight, Body Mass Index, and Postnatal Growth Pattern

    Diego Castillo-Gutierrez / Luisa E. S. Hernández-Arteaga / Manuel J. Flores-Najera / Venancio Cuevas-Reyes / Juan M. Vázquez-García / Catarina Loredo-Osti / Sergio Beltrán-López / Gilberto Ballesteros-Rodea / Antonio Gonzalez-Bulnes / Cesar A. Meza-Herrera / Cesar A. Rosales-Nieto

    Biology, Vol 11, Iss 7, p

    2022  Volume 1065

    Abstract: The last third of gestation is a period of high energy and protein demand for the dam to support fetal growth and the following onset of lactation. Methionine is an essential amino acid that contributes to protein formation, fetal development, and milk ... ...

    Abstract The last third of gestation is a period of high energy and protein demand for the dam to support fetal growth and the following onset of lactation. Methionine is an essential amino acid that contributes to protein formation, fetal development, and milk synthesis; thus, is likely to have positive effects on the weight and size of the newborn and, afterward, milk yield and milk composition, which may improve growth patterns of the progeny. To test these hypotheses, we used 60 pregnant multiparous Alpine goats with similar live weights and gestational ages (~Day 100 of pregnancy; Mean ± SD; 1410 ± 14 days old and 50.4 ± 6.6 kg) and were separated into two groups: control and supplemented with the delivery. Treatments were T-MET ( n = 30; received 1% herbal methionine Optimethione ® dry matter based on from Day 100 of the pregnancy to delivery) or T-CTL ( n = 30; served as the control and did not receive methionine). The methionine powder provided individual supplementation and was adjusted every week as the live weight and dry matter intake changed. At birth, the weight, body mass index (BMI), birth type, and sex of the kids were determined. Subsequently, the progeny was weighed weekly up to weaning. Two weeks after parturition, the milk composition was recorded weekly, and the milk yield was recorded monthly. The maternal live weight at the start (Mean ± SEM; T-CTL: 50.5 ± 1.1 vs. T-MET: 50.3 ± 1.3 kg) and end (T-CTL: 54.2 ± 1.3 vs. T-MET: 52.8 ± 1.4 kg) of the experiment did not differ statistically among treatments ( p > 0.05); however, daily live weight changes tended to differ between groups (T-CTL: 73 ± 10 vs. T-MET: 51 ± 7 g day −1

    p = 0.06). The birth weight (T-CTL: 3.1 ± 0.1 vs. T-MET: 3.5 ± 0.1 kg; p < 0.001), daily live weight change (T-CTL: 121 ± 6 vs. T-MET: 141 ± 6 g day −1

    p < 0.01), and weaning weight (T-CTL: 8.3 ± 0.2 vs. T-MET: 9.3 ± 0.3 kg; p < 0.01) differed between treatments. The BMI at birth (T-CTL: 0.28 ± 0.01 vs. T-MET: 0.3 ± 0.01 units kg m −2

    p < 0.01) and at weaning ...
    Keywords herbal methionine ; late gestation ; progeny performance ; milk components ; Biology (General) ; QH301-705.5
    Subject code 630
    Language English
    Publishing date 2022-07-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Periconceptional nutrition with spineless cactus (Opuntia ficus-indica) improves metabolomic profiles and pregnancy outcomes in sheep

    César A. Rosales-Nieto / Maribel Rodríguez-Aguilar / Francisco Santiago-Hernandez / Venancio Cuevas-Reyes / Manuel J. Flores-Najera / Juan M. Vázquez-García / Jorge Urrutia-Morales / Morteza Hosseini Ghaffari / César A. Meza-Herrera / Antonio González-Bulnes / Graeme B. Martin

    Scientific Reports, Vol 11, Iss 1, Pp 1-

    2021  Volume 14

    Abstract: Abstract We tested whether periconceptional nutrition with cladodes from the cactus, Opuntia ficus-indica, with or without protein-enrichment, improved the metabolomic profile and reproductive outcomes of adult female sheep. Sixty Rambouillet ewes of ... ...

    Abstract Abstract We tested whether periconceptional nutrition with cladodes from the cactus, Opuntia ficus-indica, with or without protein-enrichment, improved the metabolomic profile and reproductive outcomes of adult female sheep. Sixty Rambouillet ewes of similar body weight were randomly allocated among three nutritional treatments that were fed during the breeding period (34 days): Control (Control; n = 20), Opuntia (Opuntia; n = 20) and protein-enriched Opuntia (E-Opuntia; n = 20). There were no effects of treatment on body weight but assessment of urine samples indicated that, for 76 metabolites, the Control and Opuntia groups differed completely (P < 0.05), whereas there was overlap between the Control and E-Opuntia groups. It appears that, in Opuntia-fed and Control-fed sheep, different functional groups are activated leading to changes in the metabolism of glucose, tyrosine, methane, and glycerolipids. Fertility and reproductive rate tended to be higher in the Opuntia (70% and 95%) and E-Opuntia (90% and 110%) groups than in the Control (55% and 65%), and an orthogonal contrast revealed the difference between Control and Opuntia to be significant for both reproductive variables (P < 0.05). We conclude that nutritional supplementation with Opuntia cladodes, with or without protein enrichment, increased fertility rate and reproductive rate of female sheep, without any accompanying increases in body weight. Our observations suggest that the reproductive responses to Opuntia do not simply reflect a response to good nutrition, but might be caused by specific metabolites/metabolomic pathways, perhaps by an activation of the metabolism of glucose, methane, tyrosine and glycerolipids. There are few reports relating these metabolomic compounds with the metabolism of the sheep, let alone with reproductive efficiency. The novelty of these discoveries suggests that we need further research into the mechanisms through which nutrition affects the reproductive system.
    Keywords Medicine ; R ; Science ; Q
    Subject code 630
    Language English
    Publishing date 2021-03-01T00:00:00Z
    Publisher Nature Portfolio
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article ; Online: EVALUACIÓN PARTICIPATIVA DE TECNOLOGÍAS EN CAPRINOS EN EL SEMIÁRIDO DEL NORTE CENTRO DE MÉXICO

    Homero Salinas González / Francisco G. Echavarría / Manuel J. Flores-Najera / Miguel A. Flores-Ortiz / Ramón Gutiérrez / Agustín Rumayor / César A. Meza-Herrera / Francisco Pastor

    Revista Chapingo : Serie Ciencias Forestales y del Ambiente, Vol 17, Pp 225-

    2011  Volume 234

    Abstract: La cabra se localiza en agroecosistemas frágiles. Con el propósito de evaluar el efecto de tecnologías aplicadas de manera participativa, en un marco de conservación de los recursos naturales sobre la productividad de pequeños rumiantes, se probaron seis ...

    Abstract La cabra se localiza en agroecosistemas frágiles. Con el propósito de evaluar el efecto de tecnologías aplicadas de manera participativa, en un marco de conservación de los recursos naturales sobre la productividad de pequeños rumiantes, se probaron seis tecnologías: 1) El pastoreo diferido rotacional (SPDR) logró 60 % de cubierta vegetal y 35 % pastoreo continuo (PAC); 996.5 vs. 280.8 kg·ha-1 de materia seca (P<0.01) y composición botánica de 59 especies vs. 27 en SPRD y PAC, respectivamente; 2) De 200 presas filtrantes construidas, hubo retenciones hasta de 212 t de suelo sedimentado en presas de 25.5 m de ancho; 3) Resiembras con nopal Amarilla Olorosa tuvieron una supervivencia de 90.7 %; 4) La siembra de cebada logró rendimientos (MS) similares al maíz con mayor proteína cruda; 5) La suplementación de cabras y cabritos (0-5 meses) con bloques nutricionales, incrementó el PV (P<0.001) en cabritos de parto doble (71.9 g·día-1), respecto a cabritos dobles (46.5 g·día-1) y cabritos sencillos (40.7 g·día-1) no suplementados; 6) Quesos de leche caprina y bovina no difirieron (P<0.05) en atributos valorados, logrando la participación de mujeres. El enfoque de sistemas participativos permitió diseñar actividades apropiadas, incrementando la productividad y promoviendo la conservación de recursos naturales.
    Keywords Environmental sciences ; GE1-350 ; Geography. Anthropology. Recreation ; G ; Forestry ; SD1-669.5 ; Agriculture ; S
    Language Spanish
    Publishing date 2011-01-01T00:00:00Z
    Publisher Universidad Autónoma Chapingo
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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