scholarly journals Sexual Dimorphism of Digit-Length Ratio in a Viviparous Lizard: Influence of Age, but not Preservation State or Sex of Interuterine Twin

2018 ◽  
Author(s):  
Nikita Woodhead ◽  
Kelly M. Hare ◽  
Alison Cree
Keyword(s):  
Sexual Dimorphism ◽  
Length Ratio ◽  
Digit Length

Sexual dimorphism in the second-to-fourth digit length ratio in green anoles, Anolis carolinensis (Squamata: Polychrotidae), from the southeastern United States

2006 ◽  
Vol 84 (10) ◽  
pp. 1489-1494 ◽  
Author(s):  
Jennifer L. Chang ◽  
Stephanie Doughty ◽  
Juli Wade ◽  
Matthew B. Lovern
Keyword(s):  
Sexual Dimorphism ◽  
Sex Difference ◽  
Anolis Carolinensis ◽  
Length Ratio ◽  
Michigan State University ◽  
Sexually Dimorphic ◽  
State University ◽  
Oklahoma State University ◽  
Fourth Digit ◽  
Digit Length

Digit length ratios are organized during embryonic development and may show sexual dimorphism related to steroid exposure. The second-to-fourth digit length ratio (2D:4D) has received the most attention. In the present study, we measured 2D:4D of all four feet of adult male and female green anoles ( Anolis carolinensis Voigt, 1832) to determine whether it is sexually dimorphic and whether results are repeatable across laboratories. Lizards were housed at Michigan State University (MSU) and Oklahoma State University (OSU), and one investigator at each institution used digital calipers to measure the 2D:4D of each foot. At both MSU and OSU, we found that males had a significantly larger 2D:4D on the back right foot than females did, and that no sex difference existed in either the back left or the front right foot. Furthermore, although no sex difference in the front left foot was found at MSU, the 2D:4D on this foot was larger in females at OSU. Our results demonstrate both sexual dimorphism in 2D:4D and repeatability between laboratories, but they also suggest the importance of verifying such repeatability if 2D:4D or any other digit length ratio is used as a potential indicator of the early steroid environment.

Second-to-fourth digit length ratio is associated with negative and affective symptoms in schizophrenia patients

2018 ◽  
Vol 199 ◽  
pp. 297-303 ◽  
Author(s):  
Nataly Paipa ◽  
Christian Stephan-Otto ◽  
Jorge Cuevas-Esteban ◽  
Araceli Núñez-Navarro ◽  
Judith Usall ◽  
...  
Keyword(s):  
Length Ratio ◽  
Fourth Digit ◽  
Affective Symptoms ◽  
Digit Length

scholarly journals Female digit length ratio (2D:4D) and time-to-pregnancy

2016 ◽  
Vol 31 (9) ◽  
pp. 2128-2134 ◽  
Author(s):  
M.P. Vélez ◽  
T.E. Arbuckle ◽  
P. Monnier ◽  
W.D. Fraser
Keyword(s):  
Length Ratio ◽  
Time To Pregnancy ◽  
Digit Length

THE DIFFERENCES OF 2ND TO 4TH DIGIT LENGTH RATIO BETWEEN SCHIZOPHRENIA PATIENTS AND NORMAL CONTROLS

2010 ◽  
Vol 117 (2-3) ◽  
pp. 201-202
Author(s):  
Yu Sang Lee ◽  
Hyun-Woo Cho ◽  
Jeong-Ho Chae
Keyword(s):  
Length Ratio ◽  
Digit Length ◽  
Normal Controls
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