%0 Journal Article
%T Caracterizaci車n morfom谷trica del h赤brido Yaque pintado (Pseudoplatystoma Fasciatum x Leiarius Marmoratus) y sus progenitores (Siluriformes: Pimelodidae)
%A cisco J Mateo
%A Nereida Delgado
%A H谷ctor L車pez
%J Revista de la Facultad de Ciencias Veterinarias
%D 2008
%I Universidad Central de Venezuela
%X Para conocer las divergencias y/o convergencias en la forma del cuerpo entre el h赤brido yaque pintado y sus progenitores, se evalu車 por medio de un an芍lisis exploratorio, el contorno corporal total y distintas regiones del cuerpo. Para ello se utiliz車 un an芍lisis de componentes principales (ACP) con las matrices de covarianza y correlaci車n, vali谷ndose del m谷todo jackknife, con el prop車sito de verificar cu芍ndo un coeficiente dentro del componente es estad赤sticamente diferente de cero. Los an芍lisis demuestran que el h赤brido exhibe la forma corporal general de la especie progenitora P. fasciatum. Se confirma adem芍s, que el ACP con la matriz de correlaci車n, si bien logr車 extraer en la mayor赤a de los casos un mejor vector de tama o isom谷trico, no permiti車 verificar las relaciones dentro de los grupos de estudio, ya que sus gr芍ficas por lo general ubicaron a los h赤bridos en posici車n intermedia en relaci車n a sus progenitores, dando la impresi車n de que 谷stos heredan los caracteres de uno y otro padre pr芍cticamente en la misma proporci車n. Mientras que al aplicar el ACP con matriz de covarianza, las gr芍ficas s赤 permitieron visualizar las relaciones entre los grupos. Morphometric Characterization of the Yaque Pintado Hybrid (Pseudoplatystoma fasciatum x Leiarius marmoratus) and its Parents (Siluriformes: Pimelodidae) Abstract In order to elucidate both the divergences and the convergences in body shape between the yaque pintado hybrid and its parents, an exploratory analysis of total body shape and of different body regions was carried out. To test if a coefficient within the component was statistically different from zero, a principal component analysis (PCA) with covariance matrixes and correlation was done, with the aid of the jackknife method. Results of the analyses show that the hybrid exhibits the general body shape of the parental species P. fasciatum. Furthermore, it was also corroborated that the PCA with the correlation matrix allowed to extract a better isometric size vector in most of the cases, but it did not allow to verify the relationships within the groups studied, due to the fact that their graphs in general, placed hybrids in an intermediate position relative to their parents, giving the impression that hybrids practically inherit the characters from each parent in equal proportions. On the other hand, when the PCA, along with the application of the covariance matrix was applied, the resulting graphs did allow the visualization of the relationship between groups.
%K Pseudoplatystoma fasciatum
%K Leiarius marmoratus
%K h赤bridos
%K fenotipos
%K heredabilidad
%K medici車n del cuerpo
%K Pseudoplatystoma fasciatum
%K Leiarius marmoratus
%K hybrids
%K phenotypes
%K body parts
%K body measurements
%U http://wwww.scielo.org.ve/scielo.php?script=sci_arttext&pid=S0258-65762008000100006