Even without specifying the mechanisms of selection, not only are the results consistent with the hypothesized direct role of male-genitalic shape differences in reproductive isolation, but the study also provides evidence for a predominant role of sexual selection
in the maintenance of species differences (because we are studying a character involved in reproductive interactions, sexual rather than natural selection is the focus of our conclusions; see Eberhard 1994).
In the sexual selection
model based on the sensorial drive, natural selection would act on the issue, transmission and perception of the signs, considering the influence of environmental characteristics on the sensory system and communication (Endler & Basolo, 1998; Smith, Van Staaden, & Carleton, 2012a), or rather, changing the habitat would generate new selective pressures on the female preference.
When males and females differ in the potential costs of parental care, we expect sex differences in parental care to evolve (reviewed in Kokko and Jennions, 2012), which can, in turn, affect mating dynamics and sexual selection
(Kokko and Jennions, 2008; Kokko and Jennions, 2012).
Despite the fact that broadcast spawning results in the simultaneous presence of gametes from multiple individuals, and thus the inevitable potential for sperm competition or sperm choice, we know comparatively little about how post-mating sexual selection
affects reproductive traits in most species.
Indeed, while natural selection is blind, sexual selection
has an eye for beauty -- although the nature of beauty is always in the eye of the beholder.
under parental choice: The role of parents in the evolution of human mating.
we can subject the handaxe to analysis as a SSEP by applying the tenets of sexual selection
within mating swarms of the lovebug, Plecia nearctica (Diptera, Bibionidae).
You take a different approach to Darwinism and specifically to his theory of sexual selection
, which you have challenged.
is assumed to be a driving force for language evolution by several authors (Miller, 2000), but Okanoya (2002) specifically pointed out that it is the syntactical domain rather than that of semantics in which sexual selection
is strongly related with language, because sexual selection
could help evolution of arbitrary complex traits (p.
The latest research and some unusual studies explores the role of disease in longevity, evolution, and the animal and insect as well as human worlds, using the author's on work on sexual selection
processes to supplement intriguing stories from nature.
W]hen the males and females of any animal have the same general habits of life, but differ in structure, colour, or ornament, such differences have been mainly caused by sexual selection