Competition among offspring over resources, care or other opportunities. It can interact with parent-offspring conflict by redistributing a fixed supply and altering total parental provisioning.
A decline in the number of surviving offspring within a brood, often associated with limited provisioning. The occurrence of brood reduction alone does not establish an adaptive parental or offspring strategy.
Killing of a sibling, whose ecological and evolutionary explanations depend on resource limitation, asymmetry and the consequences for survivors and parents.
Contingent communication among siblings about their willingness to contest a resource, potentially reducing unnecessary competitive costs.
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