The Occurrence of Polymely and Polydactyly in Natural Populations of Anurans of the USSR

1986 ◽  
Vol 7 (3) ◽  
pp. 205-216 ◽  
Author(s):  
Leo J. Borkin ◽  
M.M. Pikulik

AbstractVarious cases of isolated and mass polymely and polydactyly in anurans of the USSR fauna are summarized. Mass polydactylies in frogs Rana arvalis arvalis and Rana lessonae-Rana esculenta as well as in toad Bufo bufo bufo are reported. Classiication of polydactyly types based on X-ray analysis is proposed. Species-specificity and lozalized appearance of mass polydactyly factor(s) are discussed.

2007 ◽  
Vol 59 (4) ◽  
pp. 327-333 ◽  
Author(s):  
Dragana Cvetkovic ◽  
Natasa Tomasevic ◽  
I. Aleksic ◽  
Andjelka Crnobrnja-Isailovic

One of the most important problems for evolutionary biologists is to investigate the patterns and strength of phenotypic selection acting on quantitative traits in natural populations. Measurement of selection is complicated by the presence of correlations between characters; selection on a particular trait produces not only a direct effect, but indirect effects as well. Despite the growing body of phenotypic selection studies in a variety of taxa, studies on amphibians are still sparse. The aim of this study was to estimate patterns and strength of selection acting on a set of correlated characters in a natural population of Bufo bufo from the vicinity of Belgrade, Serbia. Morphological traits (body length, fore- and hind leg length) were measured, while fitness was assayed as fecundity and gonad weight for females and males, respec?tively. The regression approach was used to estimate selection differentials and gradients. Selection patterns differed between the sexes - linear selection differentials showed significant total directional selection for body size in females, but not in males. In males, differentials were significant for both fore- and hind leg lengths. Sample size did not permit identification of significant nonlinear (quadratic) selection.


2016 ◽  
Vol 42 (4) ◽  
pp. 329-338 ◽  
Author(s):  
Veronika Bókony ◽  
Ágnes M. Móricz ◽  
Zsófia Tóth ◽  
Zoltán Gál ◽  
Anikó Kurali ◽  
...  

Author(s):  
Shi-wen Zhou ◽  
Jing-yu Quan ◽  
Zi-wei Li ◽  
Ge Ye ◽  
Zhuo Shang ◽  
...  

2006 ◽  
Vol 454 (1) ◽  
pp. 101-113 ◽  
Author(s):  
Nadja Møbjerg ◽  
Andreas Werner ◽  
Sofie M. Hansen ◽  
Ivana Novak

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