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Sexual size dimorphism and sexual selection in artiodactyls
(Oxford Univ Press Inc, 2020-06)
Sexual size dimorphism is biased toward males in most mammalian species. The most common explanation is precopulatory intramale sexual selection. Large males win fights and mate more frequently. In artiodactyls, previous ...
The morphology of mating plugs and its formation in scorpions: implications for intersexual participation
(Wiley-liss, div John Wiley & Sons Inc., 2020-06-08)
Mating plugs have been proposed as a mechanism that has evolved to avoid sperm competition. Their structure and composition vary across taxa and are related to the effectiveness of its function. This effectiveness could ...
Wing colour properties do not reflect male condition in the American rubyspot (Hetaerina americana)
(Blackwell PublishingOxfordInglaterra, 2007)
Reproductive interference between two sibling species of gift-giving spiders
(ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTDLONDON, 2012)
We investigated the possibility of reproductive interference between two sibling spider species, Paratrechalea azul and Paratrechalea ornata, which occur syntopically and reproduce synchronously. Males of both species offer ...
Hybridisation experiments between freshwater prawns Macrobrachium amazonicum and M. pantanalense (Decapoda: Palaemonidae), and the effects of geographical isolation
(2021-03-01)
The freshwater prawns Macrobrachium amazonicum and M. pantanalense are phylogenetically closely related. The present study analysed the occurrence of copulation between these two species. Specimens of M. amazonicum were ...
Size-assortative mating in simultaneous hermaphrodites: an experimental test and a meta-analysis
(Springer, 2015-11-05)
Assortative mating by size has been argued to be widespread in the animal kingdom. However, the strength of size-assortative mating is known to vary considerably between species and the underlying mechanisms promoting this ...
Comparative sperm ultrastructure of two tegu lizards (genus Salvator) and its relation to sperm competition
(Elsevier Gmbh, 2017-03)
The knowledge of sperm ultrastructure of Squamata provides informative traits for phylogenetic analyses. Furthermore, several sperm ultrastructure traits are important for sperm motility and longevity. Here, we provided a ...
Testicular melanization in anuran species: ontogeny and sexual maturity
(Brill Academic Publishers, 2020-06-12)
Testicular melanization in anurans may be absent or present with different degrees of intensity. When present, the color is due to the concentration of melanocytes in external (surface) and interstitial tissue. The function ...
Aedeagal Divergence in Sympatric Populations of Two Sibling Species of Cactophilic Drosophila (Diptera: Drosophilidae): Evidence of Character Displacement?
(Sociedade Entomológica do Brasil, 2012-06)
Aedeagal morphology of two sibling cactophilic species, Drosophila buzzatii Patterson & Wheeler and Drosophila koepferae Fontdevila & Wasserman, was analyzed in nine allopatric and three sympatric locations throughout South ...