Results 211 to 220 of about 29,197 (258)
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Statistics of sexual size dimorphism
Journal of Human Evolution, 1999In comparative studies of sexual size dimorphism (SSD), the methods used to quantify dimorphism are controversial. SSD is commonly expressed as a ratio between species mean values of males and females, such as M/F or (M-F)/([M+F]/2), but a number of investigators have suggested that ratios should not be used, mainly because their distributions usually ...
Richard J Smith
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Sexual dimorphism in shape and size of the neurocranium
International Journal of Legal Medicine, 2022Sex identification is a primary step in forensic analysis of skeletal remains. The accuracy of sex estimation methods greatly depends on the sexual dimorphism manifested by the target anatomical region. The study aims to evaluate the sexual dimorphism in shape and size of the neurocranium and to compare the potential of shape and size of different ...
Diana H. Toneva +4 more
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The evolution of sexual size dimorphism in prosimian primates
American Journal of Primatology, 1990 AbstractThe four major hypotheses advanced to explain the evolution of sexually dimorphic characters invoke sexual selection, natural selection, allometry, and phylogenetic inertia. In this paper, each of these hypotheses is examined for its usefulness in explaining the inter‐specific variation in sexual size dimorphism among prosimian primates.
Peter M. Kappeler
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Sexual Size Dimorphism in Seabirds
Oikos, 1995I I Opinion is intended to facilitate communication between reader and author and reader and N reader. Comments, viewpoints or suggestions arising from published papers are welcome. Discussion and debate about important issues in ecology, e.g. theory or terminology, may also I I be included. Contributions should be as precise as possible and references
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Sexual Dimorphism in Flower Size
The American Naturalist, 1996Sexual dimorphism in the secondary characters of unisexual flowers is often observed. Most prior reports indicate that male flowers have larger petals than female flowers. In this article we examine hypotheses regarding patterns of perianth (sepals and petals) size dimorphism. (1) Developmental associations between the corolla and the stamens constrain
Lynda F. Delph +2 more
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Macroevolutionary patterns of sexual size dimorphism in copepods [PDF]
Proceedings of the Royal Society B: Biological Sciences, 2014 Major theories compete to explain the macroevolutionary trends observed in sexual size dimorphism (SSD) in animals. Quantitative genetic theory suggests that the sex under historically stronger directional selection will exhibit greater interspecific variance in size, with covariation between allometric slopes (male to female size) and the strength of ...
Andrew G Hirst, Thomas Kiørboe
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An analysis of sexual size dimorphism in goose
British Poultry Science, 20141. Sexual size dimorphism (SSD) is a common phenomenon in animals. Rensch's rule states that larger species generally exhibit a higher male to female body size ratio than smaller ones. 2. Domesticated animals offer excellent opportunities for testing predictions of the functional explanations of Rensch's rule and this was tested in a meta-analysis of ...
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Sexual size dimorphism in mammals
2007AbstractThis chapter explores the pattern of sexual size dimorphism (SSD) in mammals and the processes that underlie its evolution. Most mammalian orders have male-biased SSD, although some orders are not sexually-dimorphic for body size or show significantly female-biased SSD.
Patrik Lindenfors +2 more
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Canine “Field” in Sexual Dimorphism of Tooth Size
Nature, 1966AMONG primates, sexual dimorphism in the size of permanent teeth is usually greatest for the canine tooth, that of the male exceeding that of the female by 3–7 per cent in Hylobates agilis and Homo sapiens and by nearly as much as 80 per cent in Papio anubis.
S M, Garn, R S, Kerewsky, D R, Swindler
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