Variación morfométrica y geográfica entre poblaciones de <em>Hypsiboas cordobae</em> (Anura: Hylidae) en Argentina
DOI:
https://doi.org/10.22458/urj.v4i2.2Abstract
Las diferencias fenotípicas intraespecíficas entre poblaciones separadas
geográficamente es común entre los anfibios anuros. En el presente
trabajo se realiza una caracterización morfométrica de Hypsiboas
cordobae, con el objetivo de estudiar la variación geográfica a lo largo
de la distribución de la especie. Se midieron 15 variables un total
de 86 individuos, pertenecientes a seis localidades de las provincias
de Córdoba y San Luís. Se observó dimorfismo sexual en diez de las
variables. El análisis comparativo mostró diferencias significativas
entre poblaciones, y el análisis discriminante mostró altos porcentajes
de clasificación (87,50%). Ocho variables morfométricas mostraron
relación significativa y positiva con la latitud; mientras que diez variables
mostraron relación significativa y positica con la altitud. Sin embargo, en
ambos casos las correlaciones entre las distancias morfométricas y las
latitudinales/altitudinales no resultaron significativas (Test de Mantel).
Esta variación geográfica en la morfometría de la especie puede deberse
a diferencias ambientales, o podrían deberse también a la edad de los
individuos. Por lo tanto, estos datos podían ser complementados con
estudios relacionados directamente a las condiciones ambientales de
cada localidad, como así también estudios de esqueletocronología que
permitan determinar la edad de los individuos.
ABSTRACT
Morphometric differentiation and geographic variation among
populations of Hypsiboas cordobae (Anura: Hylidae). Intraspecific
phenotypic differentiation among geographically separated
populations is common in anurans. We performed morphometric
analyses of the endemic frog Hypsiboas cordobae in order to assess the
geographic variation of morphometric variables along of distribution of
the species. We measured 15 morphometric variables on 86 individuals
from six localities of Córdoba and San Luís provinces. We found
sexual dimorphism in ten variables. The comparative analysis showed
significant differences between populations and discriminant analyses
showed high percentages of classification (87,50%). Eight morphometric
variables showed positive correlation with latitude; and ten variables
showed positive correlation with altitude. However, the correlations
between morphometric distances and latitudinal/altitudinal were not
significant. This geographic variation in the morphometry of the species
may be due to environmental differences, or may be due to the age of
individuals. Therefore, these data could be supplemented by studies
directly related to the environmental conditions of each locality, as well
as skeleton-chronological study to determine individual age.
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