Evolution of helping behavior in cooperatively breeding birds
Article Abstract:
Sex biases in helping behavior among birds is not well understood. No obvious dichotomy exists between cooperative societies with a basis in natal philopatry and formation of extended families and those formed by means of recruitment of unrelated birds into coalitions. Significance of kinship may be overemphasized for male helpers and underemphasized for females. Male helpers and female helpers may obtain very different benefits because for females there is less opportunity to inherit a territory vacancy, among other things. Cooperative breeding among birds refers to social systems in which more than two birds work to rear a single brood. Some birds thus care for young of other birds.
Publication Name: Annual Review of Ecology and Systematics
Subject: Environmental issues
ISSN: 0066-4162
Year: 1998
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Evolution of eusociality in termites
Article Abstract:
The development of termite eusociality was enhanced by several characteristics possessed by the species and its ancestors. These include offspring nest inheritance, group defense, generation overlap, sufficient food supplies, slow development and cloistered familial associations. Eusociality allows termites to develop genetic asymmetry despite the lack of meiosis and fertilization.
Publication Name: Annual Review of Ecology and Systematics
Subject: Environmental issues
ISSN: 0066-4162
Year: 1997
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Species richness of parasite assemblages: evolution and patterns
Article Abstract:
The patterns observed in component parasite communities do not necessarily reflect overall parasite fauna richness. Component communities, or host-based parasites, tend to form saturated communities, artificially inflating overall richness figures. Species richness is affected by local parasite species availability and colonization probability.
Publication Name: Annual Review of Ecology and Systematics
Subject: Environmental issues
ISSN: 0066-4162
Year: 1997
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