Assortative mating is a potential outcome of sexual selection, and estimating its level is important to better understand local adaptation and underlying trait evolution. However, assortative mating studies frequently base their conclusions on small numbers of individuals sampled over short periods of time and limited spatial scales even though spatiotemporal variation is common. Here, we chara...

Our goal in this essay is to review the hypothesis that females choose mates by the evaluation of male motor performance. We define motor performance as vigor, the ability to perform energetically expensive acts repeatedly, or as skill, the ability to perform difficult motor tasks well. Motor performance reflects most aspects of whole-organism performance that relate to survival, and thus shoul...

Extravagant ornaments evolved to advertise their bearers' quality, the honesty of the signal being ensured by the cost paid to produce or maintain it. The oxidation handicap hypothesis (OHH) proposes that a main cost of testosterone-dependent ornamentation is oxidative stress, a condition whereby the production of reactive oxygen and nitrogen species (ROS/RNS) overwhelms the capacity of antioxi...

mosque as the house of god has always been significant to rulers, people and muslim artists. it is one of the most ancient architectural subjects. varamin1jami mosque from ilkhanid2 era is one of the masterpieces of iranian-islamic architecture. it was one of the first projects which started the glorious era of renovation after the dark times of the mongols3 invasion. perfect stucco ornaments i...

mosque as the house of god has always been significant to rulers, people and muslim artists. it is one of the most ancient architectural subjects. varamin1jami mosque from ilkhanid2 era is one of the masterpieces of iranian-islamic architecture. it was one of the first projects which started the glorious era of renovation after the dark times of the mongols3 invasion. perfect stucco ornaments i...

The evolutionary divergence of sexual signals is often important during the formation of new animal species, but our understanding of the origin of signal diversity is limited [1, 2]. Sensory drive, the optimization of communication signal efficiency through matching to the local environment, has been highlighted as a potential promoter of diversification and speciation [3]. The swordtail chara...

Understanding the mechanisms that influence variation in sexually selected ornaments in seabirds has been challenging owing to the difficulty of capturing and sampling individuals outside of the breeding period when ornaments are usually grown. Stable carbon (dC) and nitrogen (dN) isotopes were used to examine the influence of pre-breeding diet composition on ornament size in the Rhinoceros Auk...