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Guinea pig's courtship call: cues for identity and male dominance status?
(2021-04-01)
Reproduction involves communication. Males usually evolve elaborate displays that may declare their qualities and attract females to mate, using signals from different modalities. Females may use cues encoded in courtship ...
The effects of male age on sperm DNA damage in an infertile population
(2007-11-01)
The objective was to investigate the influence of age on sperm DNA damage. Semen samples were collected from 508 men in an unselected group of couples attending infertility investigation and treatment. DNA fragmentation ...
Transcript levels of ten caste-related genes in adult diploid males of Melipona quadrifasciata (Hymenoptera, Apidae): a comparison with haploid males, queens and workers
(2011)
In Hymenoptera, homozygosity at the sex locus results in the production of diploid males. In social species, these pose a double burden by having low fitness and drawing resources normally spent for increasing the work ...
Neonatal inhalatory anesthetic exposure: Reproductive changes in male rats
(2002-12-01)
We investigated the effects of an inhalatory anesthetic (ethyl ether) during the neonatal period of brain sexual differentiation on the later fertility and sexual behavior of male rats. Animals were exposed to ethyl ether ...
Ultrastructural study of the lateral lobe of the prostate of Wistar rats submitted to experimental chronic alcohol ingestion
(1998-01-01)
Alcoholism is considered today one of the most serious social and medical problems. Different investigators have demonstrated that chronic exposure to alcohol causes morphological and physiological changes in the testes ...
Social cliques in male northern muriquis Brachyteles hypoxanthus
(CURRENT ZOOLOGYBEIJING, 2012)
Analyses of spatial relationships and social interactions provide insights into the social structure of animal societies and the ways in which social preferences among and between dyads affect higher order social relationships. ...
Female tawny-bellied seedeaters do not prefer more colorful males in choice experiments
(Springer Tokyo, 2013-09)
Plumage coloration has long been studied as a sexually selected character. The tawny-bellied seedeater, Sporophila hypoxantha, is a sexually dichromatic species, with adult males the more colorful sex and juvenile males ...
Two polyisoprenylated benzophenones from the floral resins of three Clusia species
(Pergamon-elsevier Science LtdOxfordInglaterra, 1999)