TY - JOUR
T1 - Analysis of asymmetries in the African fruit bats Eidolon helvum and Rousettus egyptiacus (Mammalia: Megachiroptera) from the islands of the Gulf of Guinea. I. Variance and size components of bilateral variation
AU - Juste, J.
AU - López-González, C.
AU - Strauss, R. E.
PY - 2001
Y1 - 2001
N2 - A set of cranial characters was examined in the fruit bats Rousettus egyptiacus and Eidolon helvum to compare trends and relative importance of major components of bilateral morphometric variation, and their relationship with character size. Using two-way, sides-by-individuals ANOVA, four components of variation were estimated for each bilateral variable: individual variation (I), directional asymmetry (DA), non-directional asymmetry (NDA) and measurement error (E). Both species exhibit similar major trends of variation in asymmetry across characters, as shown by principal component analysis, using variance components as variables. Degree of interspecific congruence among characters was confirmed by a two-way ANOVA with species and variance components as fixed factors. Congruence of asymmetry patterns between species suggests that the concept of population asymmetry parameter (PAP) could be extended to higher hierarchies. PAPs above the species level may result from common mechanisms or similar developmental constraints acting on species' buffering capacities and morphological integration processes.
AB - A set of cranial characters was examined in the fruit bats Rousettus egyptiacus and Eidolon helvum to compare trends and relative importance of major components of bilateral morphometric variation, and their relationship with character size. Using two-way, sides-by-individuals ANOVA, four components of variation were estimated for each bilateral variable: individual variation (I), directional asymmetry (DA), non-directional asymmetry (NDA) and measurement error (E). Both species exhibit similar major trends of variation in asymmetry across characters, as shown by principal component analysis, using variance components as variables. Degree of interspecific congruence among characters was confirmed by a two-way ANOVA with species and variance components as fixed factors. Congruence of asymmetry patterns between species suggests that the concept of population asymmetry parameter (PAP) could be extended to higher hierarchies. PAPs above the species level may result from common mechanisms or similar developmental constraints acting on species' buffering capacities and morphological integration processes.
KW - Asymmetry
KW - Eidolon helvum
KW - Fruit bats
KW - Gulf of Guinea
KW - Rousettus egyptiacus
KW - Three-dimensional coordinates
KW - Variance components
UR - http://www.scopus.com/inward/record.url?scp=0034881023&partnerID=8YFLogxK
U2 - 10.1046/j.1420-9101.2001.00298.x
DO - 10.1046/j.1420-9101.2001.00298.x
M3 - Artículo
SN - 1010-061X
VL - 14
SP - 663
EP - 671
JO - Journal of Evolutionary Biology
JF - Journal of Evolutionary Biology
IS - 4
ER -