ENWC418 Lecture Notes - Lecture 13: Northern Gannet, Lek Mating, Thermoregulation

• School: University of Delaware
• Department: Entomology and Wildlife Conservation
• Course: ENWC418
• Professor: Shriver

Document Summary

"saturated" with territory-holders & some birds must then occupy unsuitable habitats. Birds in these unsuitable habitats become "floaters. : fretwell (1972) proposed that, in any given area, habitats vary in quality or suitability, ranging from good to poor. Individuals that may be territorial over one type of resource may not defend other resources: example, sunbirds are highly territorial but will sit on the same branch with other. Predicts gradual reversal of dominance: 3) arbitrary asymmetry of ownership possession is 9/10 of law. Increased time foraging: cooperative foraging strategies, behavioral thermoregulation. Information exchange: form when benefits outweigh the cost of being surrounded by competitors, most common in non-breeding season, food whose location is unpredictable in space and time favors intraspecific flocking. Insectivores often form mixed species flocks: contain only few individuals of each species, reducing competition, each species retains own niche within flock, contain nuclear species plus attendant species.