Comparação de modelos não-lineares para descrever o crescimento de fêmeas da raça Guzerá

Dados de crescimento e reprodução de 573 vacas da raça Guzerá, nascidas entre 1961 e 1985, na Fazenda Canoas, em Curvelo, MG, foram analisados com o objetivo de estabelecer um padrão médio de crescimento, mediante o uso de um modelo matemático que se ajuste adequadamente aos dados. Os modelos Brody, Bertalanffy, Logístico, Gompertz e Richards foram ajustados aos dados de peso/idade, coletados até 1992, e comparados quanto à qualidade de ajustamento. Os pesos assintóticos e as taxas de maturidade estimadas foram, respectivamente: para o modelo Brody, 464,49 e 0,046; para o Bertalanffy, 453,18 e 0,065; para o Logístico, 447,05 e 0,085; para o Gompertz, 449,89 e 0,075, e para o Richards, 458,26 e 0,055. O modelo Richards apresentou dificuldades computacionais para ajustamento aos dados. Os outros modelos se revelaram adequados para descrever o crescimento nesses animais, apresentando pequenas variações na qualidade de ajustamento, de acordo com os critérios utilizados. O modelo Bertalanffy foi escolhido para representar a curva média de crescimento dos animais, por apresentar um ajustamento superior no conjunto dos critérios.

Mrs. Anne Grant [Material gráfico]

Resumen: Descripción: retrato de Ana Grant de tres cuartos de figura mirando de frente y con unas gafas en la mano

The bibliographer's manual of English literature containing an account of rare, curious, and useful books, published in or relating to Great Britain and Ireland, from the invention of printing; with bibliographical and critical notices, collations of the rarer articles, and the prices at which they have been sold.

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The lesser writings of Samuel Hahnemann /

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Fornander collection of Hawaiian antiquities and folklore ...

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The purgatory of suicides : a prison-rhyme : in ten books /

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Answers to inquiries respecting Frome Selwood, in Somersetshire,

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The life of James, Duke of Ormond : containing an account of the most remarkable affairs of his time, and particularly of Ireland under his government ; with appendix and a collection of letters, serving to verify the most material facts in the said history /

Previous ed. publ. under title: An history of the life of James, Duke of Ormond.

An English grammar, on synthetical principles : illustrated by exercises for grammatical analysis ; with numerous examples of false syntax : adapted to all classes of learners--

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The bibliographer's manual of English literature containing an account of rare, curious, and useful books, published in or relating to Great Britain and Ireland, from the invention of printing; with bibliographical and critical notices, collations of the rarer articles, and the prices at which they have been sold in the present century.

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Rome & l'empire aux deux premiers siècles de notre ère.

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Monaldi : a tale ...

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A cyclopaedia of practical husbandry and rural affairs in general /

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Bibliothéque du médecin-praticien; ou, Résumé général de tous les ouvrages de clinique médicale et chirurgicale, de toutes les monographies, de tous les mémorires de médecine et de chirurgie pratiques, anciens et modernes,

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