Distúrbios reprodutivos em cabras leiteiras e impactos potenciais nos sistemas de produção

Maia, Ana Lucia Rosa e Silva; Oliveira, M. E. F.; Souza-Fabjan, J. M. G.; Balaro, M. F. A.; Brandão, Felipe Zandonadi; Fonseca, J. F. da

doi:10.7213/academica.15.s02.2017.a08

Cited by 4 publications

(4 citation statements)

References 20 publications

(34 reference statements)

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“…The results obtained support the information already described by Maia et al, (2017), who mentioned that cyclicality is also strongly influenced by breed origin, where Brazilian adapted goat/sheep exhibit reproductive activity throughout all the year. Even in areas close to the tropics, exotic breed sheep exhibit seasonality, as a consequence of the original local of breed effect.…”

Section: Resultssupporting

confidence: 90%

“…Animal Sciences, v. 45, e57518, 2023 However, as the equator tropic is approached, reproductive seasonality is reduced, because the days are practically the same as the nights throughout the year. Thus, in subequatorial areas, such as the Brazilian Midwest, as long as there is nutritional support in sufficient quantity and quality, the ewe will manifest estrus throughout the year (Maia et al, 2017).…”

Section: Resultsmentioning

confidence: 99%

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Reproductive behavior of Pantaneiros sheep, Mato Grosso do Sul, Brazil

Martins

Filho²,

Ferreira³

et al. 2022

Acta Sci. Anim. Sci.

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The objective was to evaluate fertility, cyclicality behavior, and sexual performance of Pantaneiro sheep throughout the year’s photoperiods in Mato Grosso do Sul - Brazil. Two experiments were conducted. In experiment one, the ewes used aged between 2 and 4 years, distributed in three homogeneous groups of 54 animals and subjected to reproductive evaluation in three different predefined luminosity periods, consisting of autumn (11h 45 min.), spring (12h 30 min.), and summer (12h 55 min.). The characteristics studied were body weight (BW), body condition score (BCC), estrus distribution (EST), percentage of pregnant females per cycle (%P), plasma progesterone (PP), and fertility (F) in the three predefined seasons. The mating system used was controlled natural nocturnal and lasted for 45 days. Experiment two, evaluated the ram sexual activity. The males (10) were individually exposed to four ovariectomized ewes. The ewes cycled during evaluated seasons, and the highest fertility was observed in animals with BCC >2.75. The PP concentration differed among periods, and higher conception rates (F) were observed in autumn and spring. The rams (75%) had a medium of sexual performance when they performed more than two ejaculations in 20 min throughout the seasons. Pantaneiro sheep of both genders had a similar fertility index, with early and constant activity throughout the year, displaying no photoperiodism or seasonality.

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Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Reproductive behavior of Pantaneiros sheep, Mato Grosso do Sul, Brazil

Martins

Filho²,

Ferreira³

et al. 2022

Acta Sci. Anim. Sci.

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“…Cattle reproduction is also influenced by luminosity (Dahl et al, 2010). Maia et al (2017) found that females exposed to a greater number of light hours per day reach puberty at a younger age compared to females exposed to fewer light hours. In agreement, Barcellos et al (2003) state that heifers kept under long days reach puberty earlier than those kept under short days, usually around one month, this stemming from the greater release of luteinizing hormone (LH) in response to estradiol.…”

Section: Introductionmentioning

confidence: 92%

Development of a Light Sensor for Use in Farm Animals

Pereira¹,

Duarte²,

Brennecke³

et al. 2022

JASR

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Studies show that the photoperiod (duration of the light period to which the animal is exposed in a day) has a great influence on productivity when associated with other management factors, such as welfare, ambience, nutrition, and disease control. The ideal amount of light varies for each animal species. This is the context of this work, which aimed to develop an equipment to monitor the luminosity of zootechnical facilities, capable of measuring and comparing with the ideal conditions of each species, providing important information for the rural producer. The box of the device was built in a 3D printer, with the help of the Arduino IDE, the C programming language was used to program the controlled micro of the device and to obtain the brightness a temt6000 brightness sensor was used. Using the parameters of light requirements for each animal species, taken from the scientific literature, the equipment developed showed efficiency to measure and classify the luminosity of facilities for production animals.

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“…Even with these characteristics, they are widely used due to the excellent milk production. However, several factors can influence this type of production, including reproductive and nutritional efficiency [15].…”

Section: Introductionmentioning

confidence: 99%

Ovarian function and pregnancy of dairy goats supplemented with pequi oil

Gomes¹,

Vieira²,

Lima³

et al. 2020

IJEAB

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The objective of the work in question was to evaluate the ovarian function of Saanen goats supplemented with pequi oil. The experiment was carried out at the IFCE Ovine Caprinoculture vivarium, campus Crato. Eight pure Saanen goats were used, weighing an average of 1025,15 pounds, distributed in a completely randomized design with two treatments. The first treatment constituted soy oil as the lipid source and the second treatment with pequi oil. Two estrous cycles were evaluated to analyze the reproductive parameters of the females. In the first cycle, a non-castrated sheep was used as a ruffian to identify estrus, and the ovarian function was evaluated for the presence and number of follicles by ultrasound. In the second cycle, a Saanen was used in order to mate with the females. Ultrasound was performed to assess conception, fertility and prolificacy rates. The computer software SAEG 9.1 was used to analyze the values obtained. It was found that females supplemented with soybean oil stood out in comparison to goats treated with pequi oil, except for body weight, follicular diameter and body condition score, concluding that the use of pequi oil for Saanen goats it presents itself as an economically unfeasible alternative, as it has a higher acquisition value.

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Distúrbios reprodutivos em cabras leiteiras e impactos potenciais nos sistemas de produção

Cited by 4 publications

References 20 publications

Reproductive behavior of Pantaneiros sheep, Mato Grosso do Sul, Brazil

Reproductive behavior of Pantaneiros sheep, Mato Grosso do Sul, Brazil

Development of a Light Sensor for Use in Farm Animals

Ovarian function and pregnancy of dairy goats supplemented with pequi oil

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