Reproductive performance of Zebu cattle in Mexico

Lamothe-Zavaleta, C.; Fredriksson, G.; Kindahl, H

doi:10.1016/0093-691x(91)90315-5

Cited by 26 publications

(2 citation statements)

References 17 publications

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“…A notable percentage of females under PRS 3 displayed estrus signs, as evidenced by the number of mounts in the "acceptance of mounts standing" behavior, comparable to zebu females showing natural estrus (Zavaleta et al, 1991) or those induced to estrus by cloprostenol administration (Orihuela et al, 1983). In this study, the difference in the number of "accepting the mount standing still" was significant (P<0.05) when comparing PRS 3 with PRS 1 (Table 2).…”

Section: Discussionmentioning

confidence: 50%

Effect of estrus behavior on the paint removal score of the sacral region of nulliparous Bos indicus

Catalano,

Kozicki,

Daros

2024

PRW

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O objetivo deste estudo foi correlacionar o comportamento do estro com o escore de remoção de tinta da região sacral (ERT) e avaliar a associação do ERT com o número de montas e comportamentos secundários do estro em fêmeas nulíparas de Bos indicus. Vinte e quatro protocolos de inseminação artificial em tempo fixo (IATF) de três manejos foram implementados para investigação do objetivo do estudo. A comparação entre ERT 3 e ERT 2 revelou diferenças significativas nas variáveis monta recebidas, execução de monta, descanso de queixo, cheirar ou ser cheirada, lamber e ser lambida, favorecendo o grupo ERT 3 (P < 0,05), indicando estro. Entretanto, a comparação entre ERT 2 e ERT 1 não resultou em diferenças significativas nas características citadas, exceto no ser cheirada (P < 0,05), indicando ausência de estro para esses dois escores. O número de montas recebidas em ERT 2 e 1 foi insuficiente para apagar as marcações. Conclui-se que o ERT se mostrou um indicador eficiente da manifestação do estro. Os comportamentos de estro das vacas nulíparas na ERT 3 foram mais evidentes que os da ERT 1 e 2, e os comportamentos manifestados na ERT 1 foram semelhantes aos da ERT 2, indicando ausência de comportamento de estro. Assim, sugere-se que no futuro o ERT seja apenas dividido em duas classes.

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Section: Discussionmentioning

confidence: 50%

Effect of estrus behavior on the paint removal score of the sacral region of nulliparous Bos indicus

Catalano,

Kozicki,

Daros

2024

PRW

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“…Díaz et al [ 48 ] observed that high THI levels in Bos indicus cows prolong the resumption of ovarian activity postpartum, and animals are less likely to express estrous behavior. In the case of estrus duration, Zebu cattle presented an average estrus of 12.4 h if the temperatures were below 27 °C, and in higher temperatures, it lasted for 9.3 h [ 49 ]. Additionally, Orihuela et al [ 50 ] showed that under a continuous observation regime, the percentage of animals detected with overt signs of estrus in the hottest hours of the day can be as low as 30%, compared to an increase of 60% in the activity shown during the night or in the cool hours of the early morning.…”

Section: Environmental Issuesmentioning

confidence: 99%

Dual-Purpose Cattle Raised in Tropical Conditions: What Are Their Shortcomings in Sound Productive and Reproductive Function?

Galina

Geffroy

2023

Animals

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Dual-purpose husbandry might well be the most commonly employed cattle management system in tropical regions worldwide. The advantages of producing both meat and milk, although in reduced quantities, gives an edge to the farmer in coping with the volatile economic conditions that prevail in the region. Herein, we discuss the different methods of cattle management under tropical conditions based on the financial and social structure of this system. An account of the sanitary and nutritional conditions available to the farmers and how these factors affect the profitability of the enterprise will also be given. Finally, we will discuss how these systems can take advantage of several biotechnological procedures, and how these tools (such as controlled natural mating, artificial insemination, and embryo transfer) affect reproductive outcomes. The present review will mainly concentrate on production systems located less than 1000 m above sea level, as the problems and shortcomings of cattle raised above this arbitrary landmark are quite different.

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Estrus behavior, ovarian dynamics, and progesterone secretion in Criollo cattle during estrous cycles with two and three follicular waves

Quezada‐Casasola¹,

Avendaño‐Reyes²,

Macías‐Cruz³

et al. 2014

Trop Anim Health Prod

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In beef and dairy cattle, the number of follicular waves affects endocrine, ovarian, and behavioral events during a normal estrous cycle. However, in Mexican-native Criollo cattle, a shortly and recently domesticated breed, the association between wave patterns and follicular development has not been studied. The objective of this study was to evaluate the effect of number of follicular waves in an estrous cycle on development of anovulatory and ovulatory follicles, corpus luteum (CL) development and functionality, as well as estrual behavior in Criollo cows. Ovarian follicular activities of 22 cycling multiparous Criollo cows were recorded daily by transrectal ultrasound examinations during a complete estrous cycle. Additionally, blood samples were collected daily to determine serum progesterone concentrations. Only two- (n = 17, 77.3%) and three-wave follicular (n = 5, 22.7%) patterns were observed. Duration of estrus, length of estrous cycle, and length of follicular and luteal phases were similar (P> 0.05) between cycles of two and three waves. Two-wave cows ovulated earlier (P < 0.05) after detection of estrus than three-wave cows. Detected day and maximum diameter of first anovulatory follicle were not affected (P > 0.05) by number of waves. Growth rate of first dominant follicle was higher (P < 0.05) in three-wave cycles. Onset of regression of the first dominant follicle was earlier (P < 0.01) in cycles with three waves than in those with two waves. In two-wave cycles, ovulatory follicles were detected earlier (P < 0.01) and had lower (P < 0.01) growth rate than in three-wave cycles. Development (i.e., maximum diameter and volume) and functionality (minimum and maximum progesterone concentration) of CL were similar (P > 0.05) between two- and three-wave patterns. In conclusion, Criollo cows have two or three follicular waves per estrous cycle, which alters partially ovulatory follicle development and ovulation time after detection of estrus. Length of estrous cycle, as well as CL development and functionality, was not affected by number of follicular waves.

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Reproductive performance of Zebu cattle in Mexico

Cited by 26 publications

References 17 publications

Effect of estrus behavior on the paint removal score of the sacral region of nulliparous Bos indicus

Effect of estrus behavior on the paint removal score of the sacral region of nulliparous Bos indicus

Dual-Purpose Cattle Raised in Tropical Conditions: What Are Their Shortcomings in Sound Productive and Reproductive Function?

Estrus behavior, ovarian dynamics, and progesterone secretion in Criollo cattle during estrous cycles with two and three follicular waves

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