Sexual Shape and Size Dimorphism in Carabid Beetles of the GenusCeroglossus: is Geometric Body Size Similar Between Sexes Due to Sex Ratio?
作者： Hugo A Benítez , Maria-José Sanzana , Viviane Jerez , Luis E Parra , Cristián E Hernández
DOI: 10.2108/ZSJ.30.289
关键词:
摘要: Insects in many species vary greatly the expression of secondary sexual traits, resulting dimorphism, which has been proposed to be a consequence differences selection. In this study, we analyze occurrence shape dimorphism and correlation between geometric body size males females sex ratio genus Ceroglossus (Coleoptera: Carabidae) using morphometrics randomization analysis. Our results show positive relationship centroid ratio. However, also observed trend maintain “similar” sexes due characteristics associated with selection group scarcity outstanding morphological characters does not restrict reproduction capacity. The proportions was found near 1:1 for eight species. We propose that are an energy cost caused by selection; nevertheless, since similar all species, it is really relevant generate more conspicuous structures stronger male-male competence.
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