Caracterização comportamental e avaliação da qualidade de leite em caprinos da raça saanen no semiárido nordestino
Goats are social animals which groups are organized from dominance hierarchies, established by agonistic behaviors. The quality and productivity of the goat s milk can be influenced by the dominance hierarchy. In this context, the objectives of our work were describe the social and food behavior of...
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| Formato: | doctoralThesis |
| Idioma: | por |
| Publicado em: |
Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/jspui/handle/123456789/17245 |
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| Resumo: | Goats are social animals which groups are organized from dominance
hierarchies, established by agonistic behaviors. The quality and productivity of the
goat s milk can be influenced by the dominance hierarchy. In this context, the
objectives of our work were describe the social and food behavior of Saanen goats in a
semi-extensive production system; characterize the social organization from the
assessment of dominance hierarchies in two seasonal periods and correlate the
physicochemical quality of the goats milk according hierarchical position. The
experiment was conducted in the EMPARN s experimental station, located in the
district of Cruzeta/RN. We utilized 17 multiparous goats of the Saanen race, with
different age and weight. The observations were performed in precipitation and drought
phases. The scan method recorded the trough permanence and agonistic interactions by
method "all occurrences" in the pasture the alimentary behaviors of eat, ruminate on
foot, ruminate lying, leisure on foot, leisure lying and walk, by the focal animal
sampling method. The goats milk was submitted to analyzes of: density, protein, fat,
lactose, CSS and total solids. The animals spend most of the time feeding themselves,
and the activities that demand greater energy expenditure are done in the morning. The
animals changed the hierarchical structure during the seasonal periods because of the
withdrawal of some individuals of the group, having more aggressive behavior in the
rainy season. The dominant animal the lowet production, the more CSS and the lesser
fat, the goat in the middle of the hierarchy was the one that obtained the best production
and quality. We conclude that the Saanen goats adapt to the environment and the
conditions of the group to ensure better survival and its production is influenced by the
internal dynamics of the group |
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