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Age at First Gestation in Beef Heifers Affects Fetal and Postnatal Growth, Glucose Metabolism and IGF1 Concentration
Lopez Valiente, Sebastian; Rodriguez, Alejandro Martin; Long, Nathan M.; Quintans, Graciela I.; Miccoli, Florencia; Lacau Mengido, Isabel M.; Maresca, Sebastian (MDPI, 2021-11)This study aimed to determine the effects of age at first gestation on offspring growth performance, glucose metabolism, and IGF1 concentration. Heifers impregnated by AI from a single bull at 15 months of age (15 M, n = ... -
Comparison of the 7-day CO-Synch and 8-day estradiol-based protocols for estrus synchronization and timed artificial insemination in suckled Bos taurus cows
Rodriguez, Alejandro Martin; Maresca, Sebastian; Lopez Valiente, Sebastian; Bilbao, María Guillermina; Moran, Karen D.; Bartolome, Julián Alberto; Pratt, Scott L.; Long, Nathan M. (Elsevier, 2023-04)Two experiments were conducted to compare, follicle diameter (FD) on Day −1, corpus luteum (CL) area on Day 7, progesterone (P4) concentration on Day 7 and 18, pregnancy per timed artificial insemination (TAI) on Day 30, ... -
Development and growth of bovine calves demi-embryos
Ynsaurralde Rivolta, Amanda Eugenia; Rogberg Muñoz, Andrés; Lopez Valiente, Sebastian; Maresca, Sebastian; Rodriguez, Alejandro Martin; Munar, Carlos; Munilla, Sebastian; Dellavalle, Franco Alejandro; Salamone, Daniel (Elsevier, 2023-12)The aim of this study was to investigate the growth and development of animals produced from demi-embryos and compare them with whole embryos from fetus to adult life. To achieve this, calves produced from fresh demi-embryos ... -
Efecto de la vacunación contra el virus de la fiebre aftosa sobre la pérdida de preñez en un rodeo de bovinos para carne
Rodriguez, Alejandro Martin; Guzman, Cesar Federico; Lopez Valiente, Sebastian; Maletti, Ernesto Juan; Canton, German Jose; Maresca, Sebastian (Ediciones INTA, 2020-12)Se realizó un estudio para evaluar el efecto de la vacunación contra el virus de la fiebre aftosa (FA), aplicada durante el periodo embrionario, sobre la pérdida de preñez en un rodeo de vacas Angus que habían sido inseminadas ... -
Efectos de la inyección de cobre en vacas Angus al final de la gestación sobre el crecimiento fetal y posnatal de sus crías
Rodriguez, Alejandro Martin; Lopez Valiente, Sebastian; Mattioli, Guillermo Alberto; Maresca, Sebastian (Ediciones INTA, 2021-12)Para determinar si la inyección de Cu durante el último tercio de gestación puede afectar el crecimiento fetal y posnatal de la progenie, se utilizaron 70 vacas Angus con 219 ± 15 días de gestación y se asignaron al azar ... -
Effect of Protein Restriction During Mid-to Late Gestation of Beef Cows on Female Offspring Fertility, Lactation Performance and Calves Development
Lopez Valiente, Sebastian; Maresca, Sebastian; Rodriguez, Alejandro Martin; Long, Nathan M.; Quintans, Graciela I.; Palladino, Rafael Alejandro (E-Cronicon, 2019-12)Cow calf operation in Argentina are managed under extensive grazing condition and the quality of forages is often poor during second half of gestation. Protein restriction in bovine gestation affects production traits in ... -
Effect of protein restriction of Angus cows during late gestation: Subsequent reproductive performance and milk yield
Lopez Valiente, Sebastian; Maresca, Sebastian; Rodriguez, Alejandro Martin; Palladino, Rafael Alejandro; Lacau Mengido, Isabel M.; Long, Nathan M.; Quintans, Graciela I. (2018-06)The effect of level of CP fed during late gestation on reproductive performance and milk production was studied in multiparous cows. Sixty-eight pregnant Angus cows were used. At 121 d prepartum, cows were blocked by BW ... -
Effect of protein restriction of bovine dams during late gestation on offspring postnatal growth, glucose-insulin metabolism and IGF-1 concentration
Maresca, Sebastian; Lopez Valiente, Sebastian; Rodriguez, Alejandro Martin; Long, Nathan M.; Pavan, Enrique; Quintans, Graciela I. (2018-06)The objective of this study was determine whether the amount of protein provided to cows during late gestation would affect postnatal growth and lead to changes on glucose, insulin and insulin-like growth factor concentrations. ... -
Effects of inorganic copper injection in beef cows at late gestation on fetal and postnatal growth, hematology and immune function of their progeny
Rodriguez, Alejandro Martin; Lopez Valiente, Sebastian; Mattioli, Guillermo Alberto; Maresca, Sebastian (Elsevier, 2021-10)To determine if Cu injection during late gestation can affect fetal and postnatal growth, hematology and immune function of progeny, 70 multiparous pregnant Angus cows, at 219 ± 15 d of gestation, were ranked by BW and BCS ... -
Effects of inorganic selenium injection on the performance of beef cows and their subsequent calves
Rodriguez, Alejandro Martin; Lopez Valiente, Sebastian; Brambilla, Emilio Cesar; Fernandez, Eduardo Luján; Maresca, Sebastian (Elsevier, 2020-09)Sixty-seven pregnant Angus cows and their subsequent calves were used in a randomized design to evaluate the effect of inorganic Se injection from 80 d of gestation until weaning on cow reproductive parameters, BW and BCS ... -
Exposure to toxic fescue during late gestation on beef cows: effects on cow performance and offspring performance from birth to weaning
McCarty, Keelee; Bence, Ángel; Maresca, Sebastian; Lopez Valiente, Sebastian; Rodriguez, Alejandro Martin; Canton, German Jose; Long, Nathan M. (ECronicon Open Access, 2020-01-03)To examine the effects of endophyte-infected tall fescue during late gestation on maternal and offspring performance, multiparous Angus cows (n = 40) were bred via AI and allocated into grazing treatments: toxic (E+) or ... -
Frequency of Neospora caninum infections in beef cow–calf operations under extensive management
Rodriguez, Alejandro Martin; Maresca, Sebastian; Cano, Dora Beatriz; Armendano, Joaquín Ignacio; Combessies, Gustavo; Lopez Valiente, Sebastian; Odriozola, Ernesto Raul; Spath, Ernesto Juan; Odeon, Anselmo Carlos; Campero, Carlos Manuel; Moore, Prando Dadin (2016-03-30)The aim of this study was to evaluate the frequencies of Neospora caninum horizontal and vertical transmissions in beef cow–calf operations under three different extensive management systems: group A: 0.75 head per hectare ... -
Late-gestation protein restriction negatively impacts muscle growth and glucose regulation in steer progeny
Maresca, Sebastian; Lopez Valiente, Sebastian; Rodriguez, Alejandro Martin; Pavan, Enrique; Quintans, Graciela I.; Long, Nathan M. (Elsevier, 2019)The objective of this study was to determine whether the amount of protein provided to cows during late gestation would affect postnatal growth and lead to changes in glucose and insulin concentrations. At 129 d of gestation, ... -
Modelos para incrementar la producción de terneros en Argentina
Bendersky, Diego; Alvarez, Juan Mauricio; Bailleres, Matias Andres; Flores, Angela Jorgelina; Giorgetti, Hugo; Lopez Valiente, Sebastian; Maresca, Sebastian; Nasca, Jose Andres; Otondo, Jose (Ediciones INTA, 2022-05)La transformación del sector agropecuario ha generado modificaciones en los sistemas ganaderos nacionales como consecuencia del desplazamiento de la frontera agrícola. Sin embargo, aún persisten serias limitantes para ... -
The degree of maternal nutrient restriction during late gestation influences the growth and endocrine profiles of offspring from beef cows
Lopez Valiente, Sebastian; Rodriguez, Alejandro Martin; Long, Nathan M.; Lacau Mengido, Isabel M.; Maresca, Sebastian (CSIRO, 2021)Context: Cow–calf operations in Argentina are managed under extensive grazing condition and the quality of forages is often poor during the second half of gestation. The severity of nutrient restriction in bovine gestation, ... -
The Effects of Age at Weaning and Length of Lipid Supplementation on Growth, Metabolites, and Marbling of Young Steers
Tipton, Jessie E.; Lewis, Linda K.; Ricks, Ralph E.; Maresca, Sebastian; Lopez Valiente, Sebastian; Long, Nathan M. (MDPI, 2020-10)The objective of this study was to determine how weaning age, days on supplements, and lipid supplementation affected the growth and marbling deposition of steers. Steers from a single sire were early weaned (n = 24) at ... -
The influence of protein restriction during mid- to late gestation on beef offspring growth, carcass characteristic and meat quality
Maresca, Sebastian; Lopez Valiente, Sebastian; Rodriguez, Alejandro Martin; Testa, Maria Laura; Long, Nathan M.; Quintans, Graciela I.; Pavan, Enrique (Elsevier, 2019-07)The objective of this study was to determine whether crude protein intake during the last three months of gestation affects growth performance, carcass characteristics and meat quality of steer progeny. At 134 ± 14 d of ...