Probability of pregnancy before ninety days postpartum in water buffaloes
This study aimed to determine the effect of parity and season of calving on the probability of water buffalo cows becoming pregnant before 90 days postpartum. A retrospective analysis of reproductive records of 1,465 water buffaloes with 3,181 pregnancies was carried out. Buffaloes were grouped according to parity in one, two, or three and more calvings. Season of calving was created with the following values: long photoperiod (March-August) and short photoperiod (September-February) and predicted probabilities from the mixed-effects logistic regression model were calculated, and a generalized linear mixed model was fitted with random intercepts to calculate the log odds of becoming pregnant ≤90 days postpartum. The probability of pregnancy ≤90 days postpartum was 0.3645, and this was lower in primiparous (0.2717) in comparison with two-calved (0.3863) and three or more calving buffaloes (0.5166). Probability of pregnancy ≤90 days postpartum increased 1.77 odds by each increase in parity. The probability of becoming pregnant ≤90 days postpartum was higher in water buffaloes calving during the short photoperiod season (0.4239 vs. 0.2474, P>0.000), and water buffaloes calving during the long photoperiod season only had 0.2645 odds to become pregnant than those calving during the short photoperiod season. The negative effect of long photoperiod was observed indifferently of parity. In conclusion, primiparity and the long photoperiod affect water buffalo cow's reproductive performance, decreasing pregnancy probability during the first 90 days postpartum.
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Asociacion Latinoamericana de Produccion Animal
2021
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Nava-Trujillo, Hector Valeris-Chacin, Robert Morgado-Osorio, Adriana Hernández, Javier Caamaño, Janeth Quintero Moreno, Armando |
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Nava-Trujillo, Hector Valeris-Chacin, Robert Morgado-Osorio, Adriana Hernández, Javier Caamaño, Janeth Quintero Moreno, Armando Probability of pregnancy before ninety days postpartum in water buffaloes |
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Nava-Trujillo, Hector Valeris-Chacin, Robert Morgado-Osorio, Adriana Hernández, Javier Caamaño, Janeth Quintero Moreno, Armando |
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Nava-Trujillo, Hector |
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Probability of pregnancy before ninety days postpartum in water buffaloes |
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Probability of pregnancy before ninety days postpartum in water buffaloes |
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Probability of pregnancy before ninety days postpartum in water buffaloes |
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Probability of pregnancy before ninety days postpartum in water buffaloes |
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Probability of pregnancy before ninety days postpartum in water buffaloes |
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probability of pregnancy before ninety days postpartum in water buffaloes |
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This study aimed to determine the effect of parity and season of calving on the probability of water buffalo cows becoming pregnant before 90 days postpartum. A retrospective analysis of reproductive records of 1,465 water buffaloes with 3,181 pregnancies was carried out. Buffaloes were grouped according to parity in one, two, or three and more calvings. Season of calving was created with the following values: long photoperiod (March-August) and short photoperiod (September-February) and predicted probabilities from the mixed-effects logistic regression model were calculated, and a generalized linear mixed model was fitted with random intercepts to calculate the log odds of becoming pregnant ≤90 days postpartum. The probability of pregnancy ≤90 days postpartum was 0.3645, and this was lower in primiparous (0.2717) in comparison with two-calved (0.3863) and three or more calving buffaloes (0.5166). Probability of pregnancy ≤90 days postpartum increased 1.77 odds by each increase in parity. The probability of becoming pregnant ≤90 days postpartum was higher in water buffaloes calving during the short photoperiod season (0.4239 vs. 0.2474, P>0.000), and water buffaloes calving during the long photoperiod season only had 0.2645 odds to become pregnant than those calving during the short photoperiod season. The negative effect of long photoperiod was observed indifferently of parity. In conclusion, primiparity and the long photoperiod affect water buffalo cow's reproductive performance, decreasing pregnancy probability during the first 90 days postpartum. |
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Asociacion Latinoamericana de Produccion Animal |
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2021 |
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oai:ojs.ojs.alpa.uy:article-28542022-01-05T04:24:46Z Probability of pregnancy before ninety days postpartum in water buffaloes Probabilidad de prenez antes de los noventa días posparto en búfalas de agua Probabilidade de gravidez antes de noventa dias após o parto em búfalas Nava-Trujillo, Hector Valeris-Chacin, Robert Morgado-Osorio, Adriana Hernández, Javier Caamaño, Janeth Quintero Moreno, Armando water buffalo anestrus parity primiparous photoperiod season pregnancy conception interval bufalo anestro primiparas fotoperiodo estación prenez intervalo concepcion fotoperíodo estação paridade buffalo prenez intervalo de concepção primípara This study aimed to determine the effect of parity and season of calving on the probability of water buffalo cows becoming pregnant before 90 days postpartum. A retrospective analysis of reproductive records of 1,465 water buffaloes with 3,181 pregnancies was carried out. Buffaloes were grouped according to parity in one, two, or three and more calvings. Season of calving was created with the following values: long photoperiod (March-August) and short photoperiod (September-February) and predicted probabilities from the mixed-effects logistic regression model were calculated, and a generalized linear mixed model was fitted with random intercepts to calculate the log odds of becoming pregnant ≤90 days postpartum. The probability of pregnancy ≤90 days postpartum was 0.3645, and this was lower in primiparous (0.2717) in comparison with two-calved (0.3863) and three or more calving buffaloes (0.5166). Probability of pregnancy ≤90 days postpartum increased 1.77 odds by each increase in parity. The probability of becoming pregnant ≤90 days postpartum was higher in water buffaloes calving during the short photoperiod season (0.4239 vs. 0.2474, P>0.000), and water buffaloes calving during the long photoperiod season only had 0.2645 odds to become pregnant than those calving during the short photoperiod season. The negative effect of long photoperiod was observed indifferently of parity. In conclusion, primiparity and the long photoperiod affect water buffalo cow's reproductive performance, decreasing pregnancy probability during the first 90 days postpartum. Este estudio tuvo como objetivo determinar el efecto del número de partos y de la época de partos sobre la probabilidad de preñez antes de los 90 días postparto en búfalas de agua. Se realizó un análisis retrospectivo de los registros reproductivos de 1465 búfalas de agua (3181 preñeces). Las búfalas se agruparon según el número de partos en uno, dos o tres y más partos; mientras que la época de partos se creó con los siguientes valores: fotoperiodo largo (marzo-agosto) y fotoperiodo corto (septiembre-febrero). Se calcularon las probabilidades de preñez mediante el modelo de regresión logística de efectos mixtos, y se ajustó un modelo lineal mixto generalizado con intersecciones aleatorias para determinar los odds logarítmicos para la preñez ≤90 días postparto. La probabilidad de preñez ≤90 días postparto fue de 0.3645, y fue menor en primíparas (0.2717) en comparación con las búfalas de dos (0.3863) y tres o más partos (0.5166). La probabilidad de preñez ≤90 días postparto aumentó 1.77 odds por cada aumento en el número de partos. La probabilidad de preñez ≤90 días postparto fue mayor en las búfalas de agua que parieron durante la época de fotoperiodo corto (0.4239 vs 0.2474, P> 0.000), con las búfalas que parieron durante la época de fotoperiodo largo, las cuales solo tuvieron solo 0.2645 odds de preñez que aquellas que parieron durante la época de fotoperiodo corto. El efecto negativo del fotoperiodo largo se observó indistintamente del número de partos. En conclusión, la primiparidad y el fotoperíodo prolongado afectan el desempeño reproductivo de la vaca búfalo de agua, disminuyendo la probabilidad de preñez durante los primeros 90 días postparto. Asociacion Latinoamericana de Produccion Animal 2021-12-17 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion texto Articulo cientifico original application/pdf text/html text/xml https://ojs.alpa.uy/index.php/ojs_files/article/view/2854 10.53588/alpa.300104 Latin American Archives of Animal Production; Vol. 30 No. 1 (2022); 29-34 Archivos Latinoamericanos de Producción Animal; Vol. 30 Núm. 1 (2022); 29-34 2075-8359 1022-1301 eng https://ojs.alpa.uy/index.php/ojs_files/article/view/2854/1514 https://ojs.alpa.uy/index.php/ojs_files/article/view/2854/1536 https://ojs.alpa.uy/index.php/ojs_files/article/view/2854/1537 Copyright (c) 2021 Hector Nava-Trujillo https://creativecommons.org/licenses/by-nc-sa/4.0 |