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Typescript (photocopy). / Digitized by Kansas Correctional Industries

Typescript. / Digitized by Kansas Correctional Industries

Digitized by Kansas Correctional Industries

A alimentação da criança no primeiro ano de vida é essencial para o crescimento e desenvolvimento adequados. A Organização Mundial de Saúde (OMS) recomenda que o aleitamento materno seja exclusivo até os seis meses de vida e que os alimentos complementares sejam introduzidos a partir desta idade. Os objetivos desta pesquisa foram estimar a prevalência do aleitamento materno em crianças menores de 1 ano de idade e descrever a alimentação complementar entre as crianças estudadas. O estudo transversal, descritivo abrangeu 821 crianças menores de um ano de idade vacinadas na Segunda Etapa da Campanha Nacional de Vacinação nos Postos de Saúde da cidade de Guarapuava-PR. A coleta dos dados foi realizada com as mães e/ou responsáveis por crianças menores de 1 ano de idade que compareceram aos Postos de Saúde naquela data. O instrumento utilizado nesta pesquisa foi o questionário elaborado e validado pelo Instituto de Saúde da Secretaria Estadual de Saúde de São Paulo-SP e parcerias. A análise dos dados deu-se através da análise das freqüências simples de todas as variáveis coletadas. Com relação aos indicadores de aleitamento materno, 68,9% das crianças estavam em aleitamento materno, sendo 86,2% e 39,8% entre crianças menores de 4 e 6 meses, respectivamente. Considerando os indicadores de aleitamento materno exclusivo e predominante, verificou-se que entre as crianças menores de 4 meses foi de 46,4% e 41,4%, respectivamente. Para as crianças menores de 6 meses, verificou-se os seguintes percentuais: 37,3% e 18,9%, respectivamente. Entre as crianças menores de quatro e seis meses, 31,9% e 45,3% estavam recebendo outro tipo de leite que não o humano. Entre as crianças menores ou iguais a 4 meses, 5,1% estavam em alimentação complementar, e entre as menores ou iguais a 6 meses 14% , recebendo chá, água, suco, fruta, sopa de legumes e comida de panela nas últimas 24 horas. Este estudo mostrou que os indicadores de Aleitamento Materno – Aleitamento Materno e Aleitamento Materno Exclusivo estão muito aquém do preconizado pela OMS e que a introdução da alimentação complementar é precoce tanto entre crianças amamentadas como em crianças não amamentadas. / What children eat in the first year of life is essential with a view to adequate growth and development. The World Health Organization (WHO) recommends exclusive breastfeeding up to six months of age and that complementary foods be introduced from that age onwards. This study aimed to examine the prevalence of breastfeeding among children under 1 year old, as well as to describe the introduction of complementary foods among the children in this study. A cross-sectional and descriptive study was realized among 821 infants under 1 year old who were vaccinated in the Second Phase of the National Vaccination Campaign at Health Centers in Guarapuava-PR, Brazil. Data collection involved the mothers and/or responsibles for infants under 1 year old who came to the Health Centers on that day, using the questionnaire elaborated and validated by the Health Institute of the São Paulo State Health Secretary and its partners. The collected data were subject to simple frequency analysis of all variables. As to breastfeeding indicators, 68.9% of the infants received breastfeeding, with 86.2% and 39.8% of children under 4 and 6 months, respectively. Exclusive and predominant breastfeeding indicators corresponded to 46.4% and 41.4%, respectively, among children under 4 months old, against 37.3% and 18.9% for children under 6 months of age. 31.9% and 45.3% of children under 4 and 6 months old were receiving nonhuman milk. 5.1% of children aged 4 months or older and 14% of those aged 6 months or older received complementary feeding, having consumed tea, water, juice, fruit, vegetable soup and homemade food during the last 24 hours. This study has shown that Breastfeeding – Breastfeeding and Exclusive Breastfeeding indicators remain much below the levels set by the WHO and that complementary foods are introduced at an early stage for children who are breastfed or not.

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Genetic variation between individuals is of great importance for the development of breeding programmes, to select for animals with the most favourable traits. Many production companies routinely measure the feed intake of their animals, in order to calculate efficiency traits such as feed conversion ratio. The development of electronic feeders which automatically record individual intake on a visit-by-visit basis now allows the short-term feeding behaviour of animals to be monitored and analysed as another source of variation between individuals. Due to differences in the resolutions of these feeders as a measurement tool, a standard unit of feeding event needs to be estimated to allow for comparisons between studies. Different models for estimation of the defining value of a meal, the meal criterion, have been used, with the most recent incorporating the change in satiety with time since last feeding as part of the model. In this study I developed a new methodology, based on these models, for use when a within meal population of intervals cannot be easily modelled. I then used this model for application to data from four lines of broiler chickens to estimate meal criteria and compare feeding behaviour within and between the lines. Significant differences were found between fast and slow growing birds, with the faster growing birds having fewer but larger meals than the slower growing birds. However, the lines showed similar structure and bouting of their feeding behaviour, indicating that the fundamental controls of feeding behaviour, such as hunger and satiety, in these lines had been unaltered despite intensive selection for growth. The models were also applied across poultry species, kept in different experimental conditions. A similar structure to the feeding behaviour was found across all these species, with all showing clear separation of feeding events into bouts. In order to estimate the potential use of these behavioural observations in a breeding programme, the heritabilities and genetic correlations with existing performance traits were calculated for the four broiler lines. Heritabilities of all feeding behaviour traits were found to be moderate to high, and very similar across the lines. Correlations with performance traits, however, were low, meaning that there were no clear links of the traits with the current production goals investigated. This indicates that past selection for production has had limited impact on feeding behaviour and also that potential selection for feeding behaviour will have little effect on production gains. To identify the areas of the genome controlling feeding behaviour, traits were associated with a SNP panel. Many regions were found to have highly significant association with feeding behaviour traits, with the most highly correlated traits showing associations with the same regions, suggesting pleiotropic effects of genes in these regions. Future work in this area should include identification of individual genes controlling feeding behaviour to allow prediction of the effects of selection for favourable feeding behaviour on other traits, and comparison of the genotypes of different lines of broilers, to further understand the control of feeding behaviour.

Digitized by Kansas Correctional Industries

Digitized by Kansas Correctional Industries

Typescript. / Digitized by Kansas Correctional Industries