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Geographical and historical influences on cranial size and shape in tammar wallaby (Macropus eugenii) populations
ARTICLE IN PRESS Abstracts / HOMO — Journal of Comparative Human Biology 60 (2009) 239–290
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resistance, 1 subject showed a decrease and 5 subjects showed no change from preintervention. However, all subjects demonstrated a significant reduction in the power of resistance of the profound layer. This pattern may be explained by the increase of blood flow in the muscular vascular bed and probable increase of perfusion of interstitial fluid into surrounding soft tissue compartments. 10.1016/j.jchb.2009.02.050
Geographical and historical influences on cranial size and shape in tammar wallaby (Macropus eugenii) populations C. Hadley, N. Milne, L. Schmitt (School of Anatomy and Human Biology, The University of Western Australia, Australia), [email protected]
Geometric Morphometric techniques were used to examine patterns in the cranial size and shape of tammar wallaby populations (Macropus eugenii). Based on existing ecological rules and previous studies, cranial size was expected to vary with latitude (Bergmann’s Rule) and island area. Dwarfism was also expected in island populations (the Island Rule). Cranial shape was expected to reflect population separation with greater shape differentiation in populations with a greater degree of physical or temporal isolation. Nasal shape specifically was expected both to show great variation and to relate to latitude, with longer, narrower snouts in the populations living in cooler climes. Cranial size and shape variation was examined in nine isolated populations, using 143 crania from 2 mainland and 7 island populations. While there was no evidence for island dwarfism or gigantism, cranial size had significant relationships with both island size and latitude. Shape variation was most pronounced in the snout and varied with the latitude at which the tammar wallabies lived. Pair-wise comparisons were made from the mean shapes calculated for each population. Most of the population comparisons were significantly different, with a clear tendency for island populations and those with greater geographic separation to display greater shape differentiation. 10.1016/j.jchb.2009.02.051
Blurring the boundaries: 2D facial approximation of the Teouma Lapita S. Hayes (School of Anatomy and Human Biology, University of Western Australia, Australia), [email protected], F. Valentin (Centre National de la Recherche Scientifique, Universite´s Paris 1 et 10, France), [email protected],
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resistance, 1 subject showed a decrease and 5 subjects showed no change from preintervention. However, all subjects demonstrated a significant reduction in the power of resistance of the profound layer. This pattern may be explained by the increase of blood flow in the muscular vascular bed and probable increase of perfusion of interstitial fluid into surrounding soft tissue compartments. 10.1016/j.jchb.2009.02.050
Geographical and historical influences on cranial size and shape in tammar wallaby (Macropus eugenii) populations C. Hadley, N. Milne, L. Schmitt (School of Anatomy and Human Biology, The University of Western Australia, Australia), [email protected]
Geometric Morphometric techniques were used to examine patterns in the cranial size and shape of tammar wallaby populations (Macropus eugenii). Based on existing ecological rules and previous studies, cranial size was expected to vary with latitude (Bergmann’s Rule) and island area. Dwarfism was also expected in island populations (the Island Rule). Cranial shape was expected to reflect population separation with greater shape differentiation in populations with a greater degree of physical or temporal isolation. Nasal shape specifically was expected both to show great variation and to relate to latitude, with longer, narrower snouts in the populations living in cooler climes. Cranial size and shape variation was examined in nine isolated populations, using 143 crania from 2 mainland and 7 island populations. While there was no evidence for island dwarfism or gigantism, cranial size had significant relationships with both island size and latitude. Shape variation was most pronounced in the snout and varied with the latitude at which the tammar wallabies lived. Pair-wise comparisons were made from the mean shapes calculated for each population. Most of the population comparisons were significantly different, with a clear tendency for island populations and those with greater geographic separation to display greater shape differentiation. 10.1016/j.jchb.2009.02.051
Blurring the boundaries: 2D facial approximation of the Teouma Lapita S. Hayes (School of Anatomy and Human Biology, University of Western Australia, Australia), [email protected], F. Valentin (Centre National de la Recherche Scientifique, Universite´s Paris 1 et 10, France), [email protected],