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- Pyron, M.; Pitcher, T. E.; Jacquemin, S. J.
- Behavioral ecology and sociobiology 2013 v.67 no.5 pp. 747-756
- Cyprinidae; body size; dimorphism; females; fish; males; mating systems; models; phylogeny; spawning; sperm competition; testes
- ... Mating systems evolve with sexual size dimorphism (SSD) in many animals. Mating systems with males larger than females occur when males compete for female access or guard territories, while mating systems with group mating tend to occur in species where females are the same size or larger than males. In addition to variation in SSD with mating system, sperm competition varies among mating systems ...
- Reichert, Michael S.; Gerhardt, H. Carl
- Behavioral ecology and sociobiology 2013 v.67 no.5 pp. 795-804
- Hyla versicolor; amphibians; animal communication; females; males; motivation
- ... As animal contests escalate, variation in the performance of aggressive signaling behaviors can give important insights into contest dynamics. In anuran amphibians, males of numerous species utilize distinctive aggressive vocalizations during disputes over calling spaces. Little is known, however, about the causes and consequences of variation in aggressive-call characteristics. We analyzed record ...