20 research outputs found
Estudo de populaçÔes de ovinos Santa InĂȘs utilizando tĂ©cnicas de anĂĄlise multivariada.
A divergĂȘncia entre ovinos Santa InĂȘs do estado do PiauĂ criados em trĂȘs diferentes microrregiĂ”es foi estudada utilizando mĂ©todos de anĂĄlise multivariada
NEOTROPICAL XENARTHRANS: a data set of occurrence of xenarthran species in the Neotropics
Xenarthrans â anteaters, sloths, and armadillos â have essential functions for ecosystem maintenance, such as insect control and nutrient cycling, playing key roles as ecosystem engineers. Because of habitat loss and fragmentation, hunting pressure, and conflicts with 24 domestic dogs, these species have been threatened locally, regionally, or even across their full distribution ranges. The Neotropics harbor 21 species of armadillos, ten anteaters, and six sloths. Our dataset includes the families Chlamyphoridae (13), Dasypodidae (7), Myrmecophagidae (3), Bradypodidae (4), and Megalonychidae (2). We have no occurrence data on Dasypus pilosus (Dasypodidae). Regarding Cyclopedidae, until recently, only one species was recognized, but new genetic studies have revealed that the group is represented by seven species. In this data-paper, we compiled a total of 42,528 records of 31 species, represented by occurrence and quantitative data, totaling 24,847 unique georeferenced records. The geographic range is from the south of the USA, Mexico, and Caribbean countries at the northern portion of the Neotropics, to its austral distribution in Argentina, Paraguay, Chile, and Uruguay. Regarding anteaters, Myrmecophaga tridactyla has the most records (n=5,941), and Cyclopes sp. has the fewest (n=240). The armadillo species with the most data is Dasypus novemcinctus (n=11,588), and the least recorded for Calyptophractus retusus (n=33). With regards to sloth species, Bradypus variegatus has the most records (n=962), and Bradypus pygmaeus has the fewest (n=12). Our main objective with Neotropical Xenarthrans is to make occurrence and quantitative data available to facilitate more ecological research, particularly if we integrate the xenarthran data with other datasets of Neotropical Series which will become available very soon (i.e. Neotropical Carnivores, Neotropical Invasive Mammals, and Neotropical Hunters and Dogs). Therefore, studies on trophic cascades, hunting pressure, habitat loss, fragmentation effects, species invasion, and climate change effects will be possible with the Neotropical Xenarthrans dataset
FunçÔes de covariùncias sobre polinÎmios B-splines para modelagem do crescimento de bovinos de corte: revisão.
O objetivo Ă© abordar assuntos sobre polinĂŽmios B-splines utilizados em funçÔes de covariĂąncia por meio de modelos de regressĂŁo aleatĂłria com a finalidade de predizer o potencial genĂ©tico em bovinos de corte em caracterĂsticas de crescimento. Nos modelos de regressĂŁo aleatĂłria Ă© possĂvel decompor a trajetĂłria da curva de crescimento por meio das mudanças nas covariĂąncias dos efeitos aleatĂłrios. O tipo e a ordem de ajuste dos polinĂŽmios utilizados para modelagem do crescimento podem influenciar os resultados das avaliaçÔes genĂ©ticas, portanto, Ă© necessĂĄrio avaliar diferentes modelos para se auferir o mais harmĂŽnico
Avaliação de parĂąmetros fisiolĂłgicos de caprinos da raça Anglonubiana em Teresina, PiauĂ - Evaluation of physiological parameters of Anglonubian goats in Teresina, PiauĂ
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