Effects of Habitat Alterations on Bog Turtles (Glyptemys muhlenbergii): A Comparison of Two Populations

2014 ◽  
Vol 48 (4) ◽  
pp. 455-460 ◽  
Author(s):  
Angela Marie Sirois ◽  
James P. Gibbs ◽  
Alison L. Whitlock ◽  
Lori A. Erb
Keyword(s):  
Habitat Alterations ◽  
Glyptemys Muhlenbergii ◽  
Bog Turtles ◽  
Two Populations

Hibernation Ecology of an Isolated Population of Bog Turtles,Glyptemys muhlenbergii

Copeia ◽  
2016 ◽  
Vol 104 (2) ◽  
pp. 475-481
Author(s):  
Lisa M. Smith ◽  
Robert P. Cherry
Keyword(s):  
Isolated Population ◽  
Glyptemys Muhlenbergii ◽  
Bog Turtles

Effects of Site, Year, and Estimator Choice on Home Ranges of Bog Turtles (Glyptemys muhlenbergii)in Maryland

2017 ◽  
Vol 51 (1) ◽  
pp. 68-72 ◽  
Author(s):  
Nathan W. Byer ◽  
Scott A. Smith ◽  
Richard A. Seigel
Keyword(s):  
Home Ranges ◽  
Glyptemys Muhlenbergii ◽  
Bog Turtles

Evidence for Nest-Site Fidelity but Not Natal Homing in Bog Turtles (Glyptemys muhlenbergii)

2020 ◽  
Vol 54 (3) ◽  
Author(s):  
Suzanne K. Macey ◽  
Purva B. Vaidya ◽  
Caroline Chiu ◽  
J. Alan Clark ◽  
Kevin T. Shoemaker
Keyword(s):  
Site Fidelity ◽  
Nest Site ◽  
Natal Homing ◽  
Nest Site Fidelity ◽  
Glyptemys Muhlenbergii ◽  
Bog Turtles

Comparison of Principal Component Solutions in Two Populations

Methodology ◽  
2016 ◽  
Vol 12 (1) ◽  
pp. 11-20 ◽  
Author(s):  
Gregor Sočan
Keyword(s):  
Simulation Study ◽  
Principal Components ◽  
Common Factor ◽  
Principal Component ◽  
Component Model ◽  
Bootstrap Procedure ◽  
Factor Loadings ◽  
Component Loadings ◽  
Principal Component Model ◽  
Two Populations

Abstract. When principal component solutions are compared across two groups, a question arises whether the extracted components have the same interpretation in both populations. The problem can be approached by testing null hypotheses stating that the congruence coefficients between pairs of vectors of component loadings are equal to 1. Chan, Leung, Chan, Ho, and Yung (1999) proposed a bootstrap procedure for testing the hypothesis of perfect congruence between vectors of common factor loadings. We demonstrate that the procedure by Chan et al. is both theoretically and empirically inadequate for the application on principal components. We propose a modification of their procedure, which constructs the resampling space according to the characteristics of the principal component model. The results of a simulation study show satisfactory empirical properties of the modified procedure.

Molecular phylogeny and taxonomic evaluation of the genus Asaccus Dixon and Anderson, 1973 (Reptilia: Phyllodactylidae) in Iran

2020 ◽  
pp. 207-214
Author(s):  
Akbar Fattahi
Keyword(s):  
Molecular Phylogeny ◽  
Nuclear Gene ◽  
Genetic Distances ◽  
Genetic Lineage ◽  
New Taxon ◽  
Zagros Mountains ◽  
Relict Species ◽  
Taxonomical Revision ◽  
Two Populations ◽  
Taxonomic Evaluation

The Iranian species of the phyllodactylid geckos of the genus Asaccus are found only in the valleys of the Zagros Mountains, a region which represents an important area of endemism in western Iran. Recently, many relict species have been described from the central and southern parts of the Zagros Mountains, which were previously known as A. elisae. The recent descriptions of species within this complex suggest that diversity within the genus may be higher than expected and that its taxonomy and systematics should be revised. In the present study, phylogenetic relationships within the genus Asaccus were evaluated using two mitochondrial and one nuclear gene. Genetically, the genus shows high levels of variability. The molecular phylogeny of the genus suggests the presence of three main clades along the Zagros Mountains with the southern population (from the Hormozgan province) and one clade (A. sp8 and A. sp9) being sister taxon to A. montanus from UAE. The remaining samples are separated into two reciprocally monophyletic groups: the northern (Kurdistan, Kermanshah and Ilam provinces) and the central (Lorestan, Khuzestan, Kohgilouye-Bouyer Ahmad and Fars provinces) Zagros groups. The results of the present study suggest that populations attributed to A. elisae in Iran correspond to distinct lineages with high genetic distances. In brief, our results suggest that the genus needs a major taxonomical revision The Arabian origin of the genus has not been confirmed, because two populations from Zagros were located within the A. montanus, A. gallagheri and A. platyrhynchus clade. Further morphological analyses are needed to systematically define each genetic lineage as a new taxon.

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