• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 2
  • Tagged with
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 1
  • 1
  • 1
  • 1
  • 1
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Perfil hormonal anual de machos e f?meas adultos de saguis (callithrix jacchus)

Rego, M?rcio Vin?cius 31 March 2008 (has links)
Made available in DSpace on 2014-12-17T15:36:52Z (GMT). No. of bitstreams: 1 MarcioVR.pdf: 229432 bytes, checksum: 1ee93b8bd1e9e53f934d759c8f562466 (MD5) Previous issue date: 2008-03-31 / Many behavioral and biological variables of animals are expressed in the form of biological rhytms, down by the Circadian Timing System, that synchronize them with the environment from external stimuli such as light. One of them is the secretion profile of most circulating hormones regulated by the hypothalamuspirtuitary axis, which controls functions essential for the survival and reproduction of organisms. The sag?i, Callithrix jacchus, one of the most studied species about their endocrine physiology, is an appropriate subject for evaluating the profile of plasma prolactin and cortisol of adult males and females born in captivity throughout the year. Three male and two adult femelas were housed individually and subjected to natural environmental conditions over two years. Blood samples were used to measure the circulating levels of both hormones by methods radioimmunoassay (RIA) and immunoassay (ELISA), respectively. The analysis during the year of the plasmatic values of both hormones test was performed by ANOVA for repeated measures, the correlation of Spearman, and the test of Friedman and Student's t-test. The levels of prolactin in plasma were higher during the months in which there is a greater incidence of births of baby in the colony, possibly serving for modulating the expression of the behavior of parental care in both sexes. The plasma cortisol showed a lift in anticipation of the station with the highest birth rate and may be associated with the preparation of individual participation in caring for the baby, and also with the establishment of emotional bond between reproductive partners. Thus, this study shows that, despite the variations observed in the environment in which the animals live, plasma levels of prolactin and cortisol vary little throughout the year. / Muitas vari?veis biol?gicas e comportamentais dos animais se expressam sob a forma de ritmos biol?gicos, determinadas pelo Sistema de Temporiza??o Circadiana, que as sincronizam com o ambiente a partir de est?mulos externos, com a luz. Uma delas ? o perfil de secre??o da maioria dos horm?nios circulantes regulado pelo eixo Hipot?lamo-Hipofis?rio, que control fun??es essenciais para a sobreviv?ncia e a reprodu??o dos organismos. O sag?i, Callithrix jacchus, uma das esp?cies mais estudadas quanto ? sua fisiologia end?crina, ? um sujeito adequado para a avalia??o do perfil plasm?tico de prolactina e cortisol de machos e f?meas adultas nascidos em cativeiro ao lonto do ano. Tr?s machos e duas f?meas adultas foram alojados individualmente e submetidos ?s condi??es ambientais naturais durante dois anos. Amostras de sangue foram usadas para dosar os n?veis circulantes de ambos os horm?nios pelos m?todos Radioimunoensaio (RIA) e Imunoenzim?tico (ELISA), respectivamente. A an?lise ao longo do ano dos valores plasm?ticos de ambos os horm?nios foi realizada pelo teste de ANOVA para Medidas Repetidas, pela correla??o de Spearman, e pelos testes de Friedman e t de Student. Os n?veis de prolactina no plasma se mostraram mais elevados durante os meses nos quais h? uma maior ocorr?ncia de nascimentos de filhotes na col?nia, servindo possivelmente para modular a express?o do comportamento de cuidado parental em ambos os sexos. O cortisol plasm?tico mostrou uma eleva??o em antecipa??o ? esta??o com maior natalidade, podendo estar associada com a prepara??o do indiv?duo para participa??o no cuidado aos filhotes, e tamb?m com o estabelecimento de la?o afetivo entre os parceiros reprodutivos. Assim, o presente estudo mostra que, apesar das varia??es observadas no ambiente no qual os animais vivem, os n?veis plasm?ticos de prolactina e cortisol oscilam pouco ao longo do ano.
2

Padr?o de atividades do sag?i callithrix jacchus numa ?rea de caatinga

Martins, Ism?nia Gurgel 11 September 2006 (has links)
Made available in DSpace on 2014-12-17T15:37:18Z (GMT). No. of bitstreams: 1 IsmeniaGM.pdf: 2244667 bytes, checksum: 360c3e129f204cfb43b0abfb91b352c0 (MD5) Previous issue date: 2006-09-11 / Callithrix jacchus, as the other species in the family Callitrichidae, lives in social groups. The groups cam be found in different habitats, whose distinct floristic physiognomies and communities are intrinsically related to their behavioral ecology and social relations. Our objective was to describe the social relations and feeding behavior of Callithrix jacchus in the Bioma Caatinga. We observed a group at the FLONA (National Forest IBAMA), in A?u-RN, in northeastern Brazil, compose of five adults (2 females and 3 males) at the beginning of the study. The birth of five animals was registered along the study. The following behavioral categories were registered along eleven months, once a week, through instantaneous focal animal sampling: social grooming, contact, proximity, foraging, feeding, locomotion and rest. Foraging presented the highest levels comparing to other activities, and was more frequent in the dry season. Social grooming was the second more frequent activity, with higher levels in the rainy season, and between the reproductive couple. We found similar results for proximity. The most explored feeding item was the gum, specially in the rainy season. The most explored species for exudates feeding were Cirus limon (lim?o) and Pitecolobiun foliolosum (jurema branca). The comparision of fruit and insect ingestion between the seasons showed higher percentage for both in the dry season. The general activity pattern was similar to what is registeded in groups the inhabit the Atlantic Forest. These results indicate the flexibility of the species which survives and reproduces in such physically and biologically different environments / Callithrix jacchus ? um primata da fam?lia Callitrichidae que vive em grupos sociais. Pode ser encontrado em v?rios tipos de habitat, cujas fisionomias e comunidades flor?sticas distintas est?o intrinsecamente relacionadas com a ecologia comportamental e rela??es sociais. Nosso objetivo foi descrever as rela??es sociais e h?bitos alimentares do sag?i Callithrix jacchus no Bioma Caatinga. Observamos um grupo de sag?i na Floresta Nacional de A?u-IBAMA/RN, composto no in?cio do estudo por cinco animais adultos, 2 f?meas e 3 machos. Foi registrado o nascimento de 5 filhotes ao longo do estudo. A t?cnica de amostragem foi o animal focal, ao longo de 11 meses, uma vez/semana, com registro das seguintes categorias comportamentais: cata??o social, contato, proximidade, forrageio, ingest?o, locomo??o e descanso. O forrageio foi a atividade mais realizada pelos animais, sendo significativamente mais freq?ente na seca. J? a cata??o social, foi significativamente mais elevada no per?odo chuvoso, e com os maiores ?ndices entre os reprodutores. Esse mesmo padr?o foi observado com rela??o a proximidade. O alimento mais ingerido pelo grupo foi o exsudado, sendo mais expressivo no per?odo chuvoso. A esp?cie vegetal mais procurada foi o lim?o Cirus limon e a jurema branca Pitecolobium foliolosum. Quando comparada a ingest?o de frutos e insetos ao longo das esta??es, foram observados n?veis mais elevados no per?odo seco. O padr?o de atividades do grupo foi de um modo geral, semelhante ao registrado em grupos estudados em ambiente de Mata Atl?ntica, o que indica a flexibilidade da esp?cie, que sobrevive e se reproduz em ambientes t?o diferentes f?sica e biologicamente

Page generated in 0.0864 seconds