Navegando por Assunto "Reproduction"

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Acesso aberto (Open Access)
De seringueiro a ribeirinho: um estudo de caso sobre a reprodução do modo de vida beiradeiro na comunidade Bela Vista, reserva extrativista rio Xingu
(Universidade Federal do Pará, 2021-08-23) TORRES, Maria Augusta Martins Rodrigues; NAHUM, João Santos; http://lattes.cnpq.br/9009465125001273
This dissertation is a case study on the reproduction of the beiradeiro (riverine) way of life in the middle Xingu river region. The study analyzes three aspects of the way of life that produced this place, from its origin to the present day. The former Belo Horizonte seringal (rubber state), more than 300km distant from Altamira's town, in the state of Pará, was inhabited by non-indigenous migrants since the last years of the 19th century. Today, in this same space, there are riverine families living in the Bela Vista community, which since 2008 has been part of the Rio Xingu Extractive Reserve. The study shows how beiradeiro’s way of life has been reproduced in this place, the dynamics of the use of space, the work involved in the support of families and the social relations existing in the place, comparatively in the “time of the seringais” and in the “community time”.
Acesso aberto (Open Access)
Determinação do ciclo estral em catetos Pecari tajacu: aspectos colpocitológicos e clínicos
(2011) GUIMARÃES, Diva Anelie de Araújo; GARCIA, Sylvia Cristina Garcia de; LE PENDU, Yvonnick; ALBUQUERQUE, Natália Inagaki de
The main objective of this work was to study the estrous cycle of collared peccary by vaginal cytology. Samples were collected in 10 adult females, three times a week, for six months. The estrous cycle period for this specie was 28.45 ± 5.45 days. We observed a significant difference (p<0.01) between the cell types in the same phase of the oestrous cycle. During the proestrus phase, the exfoliative cytology arrangement showed high frequency of intermediate and superficial cells. The estrus phase had elevated rates of superficial cells, when compared to the other types, and an absence of leukocytes. During this phase, the external genitalia were reddish, tumescent; and the cervical mucus was evident. In the metaestrus phase, we observed a decrease of superficial cells, as well as the highest indices of intermediate cells, an increase of leukocytes and the presence of metestrus and foam cells. In the diestrus phase, the intermediate cells increased and leukocytes decreased. In conclusion, the present study suggests that it is possible to differentiate the phase of estrous cycle by vaginal cytology.
Acesso aberto (Open Access)
The stimulatory effect of male agouti (Dasyprocta prymnolopha) on the onset of female puberty
(Instituto Nacional de Pesquisas da Amazônia, 2009) GUIMARÃES, Diva Anelie de Araújo; RAMOS, Rosemar Silva Luz; GARCIA, Gary Wayne; OHASHI, Otávio Mitio
The objective of this research was to analyze female agouti puberty. We did not observe the onset of puberty when the females were raised without males. When an adult male was put together with other adults and no cycling females, the onset of estrous cycle was observed after 10 to 60 days. When the young females were raised with a male, the onset of puberty was reached at 9 months. We concluded that the male agouti influences the onset of puberty in females, and that the dominant female, apparently, inhibits or delays the puberty of the other agouti females of the group. We suggest further studies be made concerning the social control of the reproduction of these animal.