An estimated 293,000 people living in the United Kingdom have used anabolic-androgenic steroids. However, there is currently no intervention to reduce usage available in practice or academic circulation throughout the United Kingdom. This study aimed to test a novel hypothesis that increased levels of intrasexual competition may play an important influential role in the use of anabolic-androgenic steroids. Significantly higher levels of intrasexual competition were evident in users compared to non-users but only in the novice group (0-2 years of experience). The research provides evidence for intrasexual competition potentially influencing anabolic-androgenic steroid use but only during the initial stages of usage.
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http://dx.doi.org/10.1177/1359105317692145 | DOI Listing |
Arch Sex Behav
January 2025
Department of Applied Social Sciences, Hong Kong Polytechnic University, Hung Hom, Hong Kong, China.
Jealousy responses to potential mating rivals are stronger when those rivals display cues indicating higher mate quality. One such cue is vocal femininity in women's voices, with higher-pitched voices eliciting greater jealousy responses. However, cues to mate quality are not evaluated in isolation.
View Article and Find Full Text PDFAggress Behav
January 2025
Department of Biological Sciences, Louisiana State University, Baton Rouge, Louisiana, USA.
Sensory processing of communication stimuli is essential for the survival of organisms across all evolutionary branches. Multimodal signaling, the use of multiple sensory systems is crucial in this process, but little is known about the relative importance of different senses used during aggression. We used the African cichlid fish, Astatotilapia burtoni, to test how visual and chemosensory signals in male-male interactions influence behavior.
View Article and Find Full Text PDFEthology
May 2024
Konrad Lorenz Institute of Ethology, University of Veterinary Medicine, Vienna, Austria.
The bewildering courtship phenotypes of male birds of paradise () represent a classic example of sexual selection through mate choice. While the majority of sexual selection studies have focused on either mate choice or intrasexual competition, males across a variety of taxa adopt alternative mating tactics as additional means of obtaining fertilization when they are otherwise unable to. For example, across various polygynous birds, subordinate males engage in sneak copulations, which may offset the fitness costs of prolonged subordinate periods.
View Article and Find Full Text PDFbioRxiv
November 2024
Department of Integrative Biology, University of Texas at Austin, Austin, TX.
Acoustic displays are conspicuous behaviors common across diverse animal taxa. They have long been studied in behavioral ecology, evolutionary biology, and neuroscience. Most of these investigations, however, have focused on male display.
View Article and Find Full Text PDFEcol Evol
November 2024
University Program in Ecology, Duke University Durham North Carolina USA.
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