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- Hernandez-Jimenez, Armando; Rios-Cardenas, Oscar
- Animal behaviour 2012 v.84 no.4 pp. 1051-1059
- Thorichthys, etc ; Xiphophorus helleri; body size; females; fish; males; predation; predators; risk; sexual selection; Show all 10 Subjects
- ... In general, we assume that natural (predation-mediated) and sexual selection have opposing effects on the evolution of characters that serve as ornaments. Males of most swordtail fishes (genus Xiphophorus) have an elongation of the caudal fin known as the sword that is used to attract females, as it increases apparent body size of males. By increasing apparent body size, the sword may also attract ...