2 In many monogamous bird species, the dominant pairs tend to get the best territories, which in turn promote offspring survival and adult health. These social settings are usually related to feeding, grooming, and sleeping site priority. One egg is laid four days before the other, and incubation starts immediately after laying, so the elder chick is hatched four days before the younger chick and has a four-day head start on growth. Hormones and dominance edit It has been shown that modulation of hormone levels after hibernation may be associated with the establishment of dominance hierarchies within the social order of the paper wasp ( Polistes dominulus ). "Parent-Offspring Cooperation in the Blue-footed Booby (Sula nebouxii Social Roles in Infanticidal Brood Reduction". The energetic costs of defending territory, mates, and other resources can be very consuming and cause high-ranking individuals, who spend more time in these activities, to lose body mass over long periods of dominance. Tiedens, Larissa; Fragale, Alison (2003). The elder, stronger chick almost always becomes the dominant chick. 31 The second hypothesis suggests that elevated stress hormones are a result of social factors within the hierarchy particularly when the hierarchy is in transition. In order to be effective, these regulatory mechanisms must include traits that make an individual rank position readily recognizable by its nestmates. Albuquerque Plaza Office Tower, which rises 351 feet (107 m ) and was completed in 1990. "Dominance, cortisol and stress in wild chimpanzees". "Agonistic interactions and reproductive dominance in Pachycondyla obscuricornis (Hymenoptera, Formicidae. Behavioral Ecology and Sociobiology. "Flat lizard female mimics use sexual deception in visual but not chemical signals". "Reproductive Tactics of Male Savanna Baboons". They reasoned that if a primer pheromones were on the bedding then the sub-dominant's reproductive function should continue to be suppressed. Similarly, the status of a male Canada goose is determined by the rank of his family. "Power moves: Complementarity in dominant and submissive nonverbal behavior". Dispersal is often associated with increased mortality and subordination may decrease the potential benefits of leaving the group.