The finite time and energy budget forcing organisms to trade off between competing activities like foraging and vigilance
Growth limitation of organisms due to insufficient availability of essential nutrients like nitrogen or phosphorus
Morton's theory that physical behaviors and acoustic signals are associated, with aggressive behaviors linked to noisy, low-frequency sounds and submissive behaviors to higher-frequency pure tones
Mathematical relationships that describe how tree dimensions and biomass scale with each other
Breeding birds must balance energy allocation between reproduction and survival, with parasites forcing energy towards immune response rather than reproductive traits
Theory stating that foragers will leave a patch after the quality of the patch drops below the average quality of the overall habitat
Situations where time spent on one activity reduces time available for other activities