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 Author(s): ROMANELLO, N.; BOTTA, D.; MOURA, A. B. B.; PANTOJA, M. H. de A.; BARRETO, A. do N.; SOUZA, M. A. de P.; VOLANTE, C. A.; GARCIA, A. R. Spermatogenesis is coordinated by the hypothalamic-pituitary-gonadal axis, mainly by GnRH secretion. |
 Author(s): PINTO, T. M. F.; MOREIRA, R. F.; MATOS, M. N. C.; SOARES, V. V. M.; AGUIAR, M. V. de A.; ARAGÃO, P. de T. T. D. de; ALVES FILHO, J. G.; MORENO, F. B. M. B.; MONTEIRO-MOREIRA, A. C. de O.; COSTA, C. R. R.; LIMA FILHO, J. L. de; ELOY, A. M. X.; CUNHA, R. M. S. da Abstract: The Saanen goat breed has been widely explored in breeding programmes; however, there are few reports about the breed?s genetic and molecular composition. Thus, this study aimed to character... ... |
 Author(s): PEREIRA, A. S.; LIMA, A. F.; KIRSCHNIK, L. N. G.; KIRSCHNIK, P. G. O objetivo do estudo foi caracterizar o desenvolvimento gonadal do pirarucu no primeiro ano de vida, por meio de análises histológicas. Dez exemplares foram aleatoriamente selecionados para cada class... ... |
 Author(s): JORGE, W.; ISSA, E. C.; SERENO, F. T. P. de S.; SERENO, J. R. B. ABSTRACT: Domestic cattle breeds are classified in two subspecies: Bos taurus taurus, which have an european origin and Bos taurus indicus, the zebuines, originated in India. The main phenotypic diffe... ... |
 Author(s): GONÇALVES, A. A.; GARCIA, A. R.; CRUZ, G. S. DA; SANTOS, S. DO S. D.; OHASHI, O. M. The study aimed to evaluate the effect of short-term heat stress on sperm morphology, relating them to the stages of spermatogenesis. Adult buffalo bulls underwent scrotal insulation (day 0; 48 hours)... ... |
 Author(s): ANDREUSSI, P. A. T.; COSTA, D. S.; FARIA, F. J. C.; FERNANDES, C. A. C.; SANTOS, M. D.; SILVA, J. C. B. The objective of this study was to evaluate the quantitative histology and testicular biometrics in zebu bulls of different breeds. Testicular fragments of Nelore (n=10), Polled Nelore (n=6), Gir (n=5... ... |
 Author(s): MOLINA, J. C. J.; SILVA, R. S. da; BIDEGAIN, F. A.; SOUZA, Y. B.; PURDY, P. H.; BLACKBURN, H. D.; AZEVEDO, H. C. This study evaluated relationships among reproductive parameters and the bioclimatic indices: temperature and humidity index (THI), equivalent temperature index (ETI), black globe temperature and humi... ... |
 Author(s): NOGUEIRA, E.; TIRPÁK, F.; HAMILTON, L.; ZIGO, M.; KERNS, K.; SUTOVSKY, M.; KIM, J.; VOLKMANN, D.; JOVINE, L.; TAYLOR, J. F.; SCHNABEL, R. D.; SUTOVSKY, P. This study is part of a concerted effort to identify and phenotype rare, deleterious mutations that adversely affect sperm quality, or convey high developmental and fertility potential to embryos and... ... |
 Author(s): CASTANHOLE, M. M. U.; PEREIRA, L. L. V.; SOUZA, H. V. de; VALERIO, J. R.; BARBOSA, L. R.; ITOYAMA, M. M. Spittlebugs annually infest pastures and cause severe damage, representing a serious problem for the tropical American beef cattle industry. Spittlebugs are an important biotic constraint to forage pr... ... |
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