A. O. A. Silva
Federal University of Pará
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by A. O. A. Silva.
Pesquisa Veterinaria Brasileira | 1999
Éva Molnár; László Molnár; Hilma Lúcia T. Dias; A. O. A. Silva; William Gomes Vale
The occurrence of the infection with Bovine Leukosis Virus (BLV) was examined in agar-gel immunodiffusion (AGID) test and with indirect enzyme-linked immunosorbent assay (ELISA), in the State of Para, Brazil. The blood sera were collected from different breeds including Nelore, Piemontes, Simental, Holstein Frisian, Indubrasil, Girolanda, Simbrasil and their cross-breedings. The majority of the animals were adults. The overall occurrence of infections was 49.8% (359/721) and 26.0% (174/668) for ELISA and AGID test, respectively. All animal groups examined showed infection in ELISA, however in the AGID test two groups were sera negative.
Andrologia | 2018
L. K. X. Silva; J. S. Sousa; A. O. A. Silva; J. B. Lourenço Junior; C. Faturi; Lucieta Guerreiro Martorano; I. M. Franco; M. H. A. Pantoja; D. V. Barros; Alexandre Rossetto Garcia
This study evaluated the capacity of thermoregulation and its consequences on the scrotal surface temperature patterns and semen quality of buffalo bulls raised in a wet tropical climate. Eleven water buffaloes were evaluated in the rainiest, in the transitional and in the less rainy season. Air temperature and humidity were consistently high, but the animals did not show thermal stress in any season. The scrotal temperature gradient of buffalo bulls using infrared thermography was described, and three parallel and decreasing thermal bands were characterised. Sperm quality (n = 176 ejaculates) was maintained in normal parameters over the periods. Pearsons coefficients showed that sperm volume and progressive motility were negatively correlated with ocular globe, epididymal tail and minimum scrotal temperatures (p < .01). Sperm membrane integrity was negatively influenced by increases in epididymal tail and minimum scrotal temperatures (p < .01). Ocular globe temperature also showed positive correlation with rectal, spermatic cord, and epididymal tail temperatures (p < .01). Therefore, even under high temperature and humidity, the thermoregulatory system was effective in preventing heat stress and the normality of scrotal surface temperatures, spermatogenesis and sperm maturation were maintained.
Tropical Animal Health and Production | 2015
Daniel Vale Barros; Lilian Kátia Ximenes Silva; José de Brito Lourenço; A. O. A. Silva; André Guimarães Maciel e Silva; Irving Montanar Franco; Carlos Magno Chaves Oliveira; Patrícia Tholon; Lucieta Guerreiro Martorano; Alexandre Rossetto Garcia
Proceedings of the 1st Buffalo Symposium of Americas, Belém, Pará, Brazil, 1-4 September 2002 | 2002
W. G. Vale; A. O. A. Silva; J. S. Sousa; W. L. A. Pereira; A. N. Magalhães; C. M. C. Oliveira; H. F. L. Ribeiro; J. de B. Lourenço Júnior; O. M. Ohashi
Proceedings of the 1st Buffalo Symposium of Americas, Belém, Pará, Brazil, 1-4 September 2002. | 2002
A. O. A. Silva; A. V. Mota; H. F. L. Ribeiro; J. S. Souza; A. N. Reis; W. G. Vale; J. de B. Lourenço Júnior; O. M. Ohashi
Semina-ciencias Agrarias | 2017
Adriana Novaes dos Reis; M. S. Miranda; Lílian Kátia Ximenes Silva; A. O. A. Silva; José Silva de Sousa; Eziquiel de Morais; Alexandre Rossetto Garcia; Sheyla Farhayldes Souza Domingues; Joyce Kelly R. da Silva; H. F. L. Ribeiro
Animal reproduction | 2015
D. V. Barros; L. K. X. Silva; P. R. Kahwage; A. O. A. Silva; André Guimarães Maciel e Silva; I. M. Franco; Lucieta Guerreiro Martorano; J. B. Lourenço Junior; N. Romanello; Alexandre Rossetto Garcia
Animal reproduction | 2014
D. V. Barros; Alexandre Rossetto Garcia; André Guimarães Maciel e Silva; A. O. A. Silva; J. S. Sousa; L. K. X. Silva; P. R. Kahwage; Patrícia Tholon; Lucieta Guerreiro Martorano; L. M. Franco
Proceedings of the 1st Buffalo Symposium of Americas, Belém, Pará, Brazil, 1-4 September 2002. | 2002
A. J. O. Sousa; M. S. Miranda; A. N. Reis; A. O. A. Silva; J. S. Sousa; O. M. Ohashi; W. G. Vale; J. de B. Lourenço Júnior
Proceedings of the 1st Buffalo Symposium of Americas, Belém, Pará, Brazil, 1-4 September 2002. | 2002
A. S. A. Camelo; H. F. L. Ribeiro; A. O. A. Silva; J. S. Souza; W. G. Vale; J. de B. Lourenço Júnior; O. M. Ohashi