SIZE-DEPENDENT ASYMMETRY: FLUCTUATING ASYMMETRY VERSUS ANTISYMMETRY AND ITS RELEVANCE TO CONDITION-DEPENDENT SIGNALING
نویسندگان
چکیده
منابع مشابه
Size-dependent Asymmetry: Fluctuating Asymmetry versus Antisymmetry and Its Relevance to Condition-dependent Signaling.
Fluctuating asymmetry (FA) has received much recent attention in studies of the evolution of sexual signaling systems. Tests apparently showing that symmetry decreases as individual condition decreases have bolstered the view that FA plays a significant role in the evolution of sexual signals. However, a closer inspection of several examples of bilateral variation as a function of trait size (a...
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Fluctuating asymmetry refers to small random deviations from perfect symmetry in bilaterally paired structures; it is thought to reflect an organism’s ability to cope with genetic and environmental stress during development and its utility as an indicator of such stresses is based on the assumption that perfect symmetry is an a priori expectation for the ideal state of bilateral structures. Flu...
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The analysis of eight cephalometric paired characters of 1236 children aged 7 to 10 was carried out. The standardized variance of differences between right and left character values (R-L) and the correlations between right and left values of same individuals were used to assess the fluctuating asymmetry (FA) level of each character and each individual. The highest values of FA were observed for...
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We tested seven hypotheses regarding the mechanisms by which fluctuating asymmetry (FA) originates. We did this by analyzing data on four bilateral characters measured repeatedly during the development of individual domestic fowl. Immediately posthatching, there was substantial directional asymmetry, which rapidly decreased. We detected FA at significant levels in all characters in the majority...
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Inconsistencies in the relationship between fluctuating asymmetry (FA) and fitness may be due to selection acting on the degree of trait asymmetry that differs among populations or among traits. We assessed relationships between parasite susceptibility and fluctuating asymmetry in the number of bony lateral plates among 83 populations of freshwater Gasterosteus aculeatus (three spined stickleba...
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ژورنال
عنوان ژورنال: Evolution
سال: 1997
ISSN: 0014-3820
DOI: 10.1111/j.1558-5646.1997.tb01463.x