Características do sêmen e maturidade sexual de touros jovens da raça Tabapuã (Bos taurus indicus) em diferentes manejos alimentares

Correa, A.; Filho, V. R. Vale; Corrêa, G.S.S.; Andrade, Venício José de; Silva, M. A.; Dias, Juliano César

doi:10.1590/s0102-09352006000500018

Cited by 10 publications

(13 citation statements)

References 4 publications

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“…Concerning concentration, Corrêa et al (2006) studied 270 bulls of Tabapuã breed with two years old, and got an average of 0,337x10 6 sperm cells/mm 3 higher than the present study rather results for both animals considered suitable for breeding was 0.89x10 6 sperm cells/mm 3 as for animals deemed unfit for breeding and was 0.85 x 106 sperm cells/mm 3 .…”

Section: Ultrasound As Tool For Diagnosis Of Diseases Of the Reproduccontrasting

confidence: 62%

Ultrasound as tool for diagnosis of diseases of the reproductive tract bulls

Sousa¹,

Filho²,

Ribeiro

et al. 2015

AVS

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ABSTRACT:The purpose of this study was to evaluate by ultrasound and breeding soundness examination (BSE) the major diseases affecting the reproductive tract of Nelore bulls, bred extensively in the state of Para, Brazil. Fifty-nine pure Nelore bulls were used, aged between 5 to 10 years, raised extensively in a commercial farm in the municipality of Paragominas, Pará state, Brazil. Scrotal circumference, testicular length and width were measured. Semen collection for evaluation of ejaculate volume, wave motion, motility, vigor, concentration and sperm pathologies was performed. Ultrasound examination was performed by equipment type Ultrasonic Transducer -CHISON/D600vet, linear transducers, where the frequency used was 5 MHz, being held two images of each testis, the longitudinal-lateral, lateral and transverse planes. The images were processed using the program Image J. The data were analyzed using the statistical program SAS (2000) and means were compared using Tukey's test (p<0.05). Among the fifty-nine bulls evaluated, 39 (66.1%) were classified as suitable for breeding and 20 (33.8 %) were classified as unsuitable. Throughout the use of ultrasonography changes as testicular degeneration one case (1.6%), one of orchitis (1.6%), one of hydrocele (1.6%), nine of calcification (15.2%) and two cysts in the testicular region parenchyma (3.3%) were found. The average scrotal circumference was 38.6±2.4 and 40.4±3.6 cm for the animals fit and unfit for reproduction categories respectively, observing statistical difference (P < 0.05). The average physical characteristics of semen for breeding animals was 74.2±18.8% for motility, 2.9±1.62% for wave motion, 3.2±1.08% for vigor, 4.7 ± 2.58 mL for volume, 0.84 ± 0.56 x106 sperm/mm 3 concentration and 9.4±4.7% of total sperm pathologies. For the unfit animals data was 73.2±24.6% for motility, 2.8±1.78% for wave motion, 3.3±1.17 vigor, 4.5 ± 2.16 mL volume, 27±0.14% of total sperm pathologies and 0.85±0.51 x 10 6 sperm/mm 3 for concentration. Statistical differences in the percentage of total sperm pathologies between fit and unfit animals was observed (P<0.05). The mean pixel intensity of testicular parenchyma was 45.35 to 45.25 for fit for animals unfit animals, without any statistical difference (P>0.05). Thus, it can be concluded that ultrasonography is an essential complementary tool in the diagnosis of reproductive disorders in animals subjected to BSE and its use should be recommended.

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Section: Ultrasound As Tool For Diagnosis Of Diseases Of the Reproduccontrasting

confidence: 62%

Ultrasound as tool for diagnosis of diseases of the reproductive tract bulls

Sousa¹,

Filho²,

Ribeiro

et al. 2015

AVS

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“…Currently, we have noticed the great advance in the genetic improvement in the zebu animals, which has shorten the distance between their productive rates in relation to European breeds. This effect can be noticed in the age reduction in reaching puberty and sexual maturity seen in zebu herds, even those created extensively (Vasconcelos et al., ; Brito et al., ; Martins et al., ), as well as in the increase in scrotal perimeter seen in selected herds (Vasconcelos et al., ; Corrêa et al., ; Viu et al., ; Martins et al., ; Neves et al., ).…”

Section: Introductionmentioning

confidence: 99%

Efficiency of the Spermatogenesis in Zebu Bulls (bos taurus indicus)

Andreussi

Faria

Fernandes³

et al. 2013

Anat Histol Embryol

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The objective of the research was to evaluate the efficiency of the spermatogenesis through the morphology of the testicular parenchyma in bulls of different zebu breeds. We used testicular fragments from bull of the breeds Nelore (n = 10), Polled Nelore (n = 6), Gyr (n = 5), Guzerat (n = 5) and Tabapuã (n = 5). The tissue was perfused with Karnovsky solution, included in glycol methacrylate and stained with toluidine blue-sodium borate 1%. Animals of the Nelore breed presented higher population of primary spermatocyte in pre-leptotene/leptotene (38.30) and in pachytene (38.14) and round spermatids (113.30), higher yield of spermatogonia mitosis (21.2) and higher daily spermatic production per gram of testicular parenchyma (32.8 × 10(6) ) than those from breeds Gyr, Guzerat and Tabapuã and higher general yield of spermatogenesis (62.4) than breeds Gyr and Tabapuã. There was no significant difference in any of the evaluated parameters between breeds Nelore and Polled Nelore. The rate of Sertoli cells did not vary between the studied breeds. Apparently, the genetic selection applied to the breeds has been improving the yield in the spermatogenic process by decreasing cellular loss, although it did not increase the support capacity of the Sertoli cells.

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“…Por su parte, Silveira (22) y Corrêa y colaboradores (24) verificaron valores similares a los hallados en el presente estudio en toros de la raza nelore y tabapuã, respectivamente, también por el método de electroeyaculación.…”

Section: Resultsunclassified

Estadio de madurez sexual en toros de la raza nelore

López¹,

Pinto²,

Villadiego³

et al. 2015

Rev. Med. Vet.

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La presente investigación se planteó con el objetivo de determinar el estado de madurez sexual de toros jóvenes de la raza nelore y su relación con el perímetro escrotal y las características seminales. Se estudiaron 1985 animales con edades comprendidas entre los 19 y los 23 meses de edad, alimentados con pasturas tropicales (Brachiaria brizantha, Brachiaria decumbes y Panicum maximun) y evaluados a través de examen andrológico. Se valoraron las características físicas del eyaculado, la morfología espermática y el perímetro escrotal (PE). Tras el examen andrológico, los animales se clasificaron como aptos para la reproducción (clase andrológica 1); aptos para la reproducción en régimen de monta natural (clase 2); no aptos para la reproducción temporalmente (clase 3) y descartados (clase 5). Para comparar las medias encontradas entre las clases andrológicas se utilizaron dos pruebas: la de Tukey, con probabilidad del 5 % de error, y la de correlaciones simples de Pearson, para verificar las relaciones entre las características estudiadas. Se encontró que el 84,5 % de los toros son sexualmente maduros. El 39,75 % de los animales aptos para la reproducción presentó un PE mayor a 34 cm, y solo el 0,71 % de la población estudiada exhibió una circunferencia escrotal inferior a 28 cm. Se registraron correlaciones altas favorables entre PE y las características físicas del semen. Se concluye que el PE es una excelente característica para evaluar y seleccionar toros jóvenes de la raza nelore.

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Características do sêmen e maturidade sexual de touros jovens da raça Tabapuã (Bos taurus indicus) em diferentes manejos alimentares

Cited by 10 publications

References 4 publications

Ultrasound as tool for diagnosis of diseases of the reproductive tract bulls

Ultrasound as tool for diagnosis of diseases of the reproductive tract bulls

Efficiency of the Spermatogenesis in Zebu Bulls (bos taurus indicus)

Estadio de madurez sexual en toros de la raza nelore

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