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- Anderson, David J.; Ricklefs, Robert E.
- Ecology 1992 v.73 no.4 pp. 1363-1374
- siblicide, etc ; Sula; adults; breeding; chicks; evolution; fledglings; forage; foraging; parents; portion size; seabirds; Show all 12 Subjects
- ... Food limitation has been thought to explain the evolution of single—chick broods in pelagic seabirds. We compared the meal sizes, feeding rates, and time budgets of Masked Boobies (Sula dactylatra), typical pelagic seabirds, which raise one chick per breeding attempt, with those of sympatric Blue—footed Boobies (S. nebouxii), which often raise two or more chicks to fledging. Breeding adult Masked ...
- Mock, Douglas W.; Lamey, Timothy C.; Ploger, Bonnie J.
- Ecology 1987 v.68 no.6 pp. 1760-1772
- siblicide, etc ; hunger; siblings; food shortages; vigor; Ardea herodias; fighting behavior; Pandion haliaetus; parents; Sula nebouxii; Stercorariidae; Rissa; Ardea alba; chicks; food safety; Show all 15 Subjects
- ... In facultatively siblicidal bird species, the amount of food delivered by parent birds to their young ("food amount") has been assumed to be both an important proximate and ultimate cause of fatal aggression. The proximate "Food Amount Hypothesis" (FAH) contends that sibling aggression will vary inversely with the quantity of food delivered by the parents, presumably mediated by chick hunger. At t ...