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  • 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

AmbiÃncia e bem-estar de ovelhas criadas em sistema agrossilvipastoril no semiÃrido cearense. / Ambience and wellness sheep created in agrosylvopastoral system in Cearà semiarid region.

IsmÃnia FranÃa de Brito 14 September 2012 (has links)
CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior / This study aimed to establish the physiological parameters of ewes reared in agrosilvopasture system in the northeast semiarid and hence assess environmental conditions offered by the system. Thus, 22 crossbred ewes were selected and evaluated during the dry and rainy seasons, considering the following physiological parameters: heart rate (HR), respiratory rate (RR), surface temperature (ST) and rectal temperature (RT) during shifts morning and afternoon. Six mini-stations and meteorological Data Loggers were used to record the data of temperature and relative humidity. It was calculated the Enthalpy Index of Comfort (EIC) for evaluating the thermal comfort. It was observed that the temperature was higher in the dry season compared to the rainy season and the RR presented significant difference (P <0.05) between the morning and afternoon during the rainy season. Statistical difference was observed (p <0.05) for both HR between the dry and rainy seasons, as between morning and afternoon shifts. As for the ST, a significant difference (p <0.05) was detected between the morning and afternoon and between the dry and rainy seasons. For TR, the data showed no statistical difference (p> 0.05) for the afternoon shift, between the two periods evaluated. The sexual behavior of animals was also monitored and, through an ethogram, the following parameters were evaluated: proximity to male (PM); urination (U); smells the male (SM); licks the male (LM); mounts the male (MM); remains immobile with the male sniffing (RIMS); wags/raises the tail (W/RT); mounts the females (MF); allows to assemble by females (AAF) and accepts the mount (AM). It was observed that PM, U, RIMS, SM and WRT showed a significant relationship (p <0.05) with acceptance of mount. The demonstration of the sexual conduct of females studied was not affected by the climatic parameters. The rectal temperatures were 38.1 ÂC for females that showed estrus during the morning and 38.7 ÂC for the afternoon shift. The animals showed normal sexual behavior in estrus and the rectal temperature of ewes remained in the normal limits. Overall, the system agrosilvopastoral evaluated in this study ensured favorable conditions for thermal comfort and well being of the animals. / Objetivou-se estabelecer os parÃmetros fisiolÃgicos de ovelhas criadas em sistema agrossilvipastoril no SemiÃrido Nordestino e, consequentemente, avaliar as condiÃÃes ambientais oferecidas aos animais por esse sistema de criaÃÃo. Assim, foram selecionadas 22 ovelhas mestiÃas, avaliadas durante as Ãpocas seca e chuvosa, quanto aos seguintes parÃmetros fisiolÃgicos: frequÃncia cardÃaca (FC); frequÃncia respiratÃria (FR); temperatura superficial (TS) e temperatura retal (TR), durante os turnos da manhà e tarde. Seis miniestaÃÃes meteorolÃgicas e Data Loggers foram utilizadas para o registro dos dados de temperatura e umidade relativa do ar. Foi calculado o Ãndice Entalpia de Conforto (IEC) para a avaliaÃÃo do conforto tÃrmico. Foi possÃvel observar que a temperatura mostrou-se mais elevada no perÃodo seco em comparaÃÃo ao perÃodo chuvoso; que a FR apresentou diferenÃa significativa (P<0,05) entre os turnos da manhà e da tarde no perÃodo chuvoso. Foi observada diferenÃa estatÃstica (p<0,05) para a FC tanto entre as Ãpocas seca e chuvosa, quanto entre os turnos manhà e tarde. Quanto à TS, esta apresentou diferenÃa (p<0,05) entre os turnos da manhà e tarde e entre as Ãpocas seca e chuvosa. Para TR, os dados mostraram que nÃo houve diferenÃa estatÃstica (p>0,05) para o turno da tarde, entre as duas Ãpocas avaliadas. Foi monitorada ainda a conduta sexual dos animais e, por meio de um etograma, foram avaliados os seguintes parÃmetros: proximidade ao macho (PM); micÃÃo (M); cheira o macho (CM); lambe o macho (LM); monta no macho (MM); mantÃm-se imÃvel com o macho cheirando (IMC); abana/levanta a cauda (ALC); monta nas fÃmeas (MF); deixa-se montar pelas fÃmeas (DMF) e aceita a monta (AM). Observou-se que PM, M, IMC, CM e ALC apresentaram uma relaÃÃo significativa (p < 0,05) com a aceitaÃÃo da monta. A demonstraÃÃo da conduta sexual das fÃmeas estudadas nÃo foi afetada pelos parÃmetros climÃticos. As temperaturas retais foram de 38,1 ÂC para as fÃmeas que apresentaram estro no turno da manhà e 38,7 ÂC para as do turno da tarde. Os animais apresentaram comportamento sexual normal de ovelhas em estro e a temperatura retal das ovelhas se manteve dentro da normalidade. De forma geral, o sistema agrossilvipastoril avaliado nesta pesquisa assegurou condiÃÃes favorÃveis de conforto tÃrmico e bem estar aos animais.

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