Theory of evolution of nest parasitism in birds

Article Abstract:

A quantitative genetic model of nest parasitism in birds, which incorporates clutch size, conspecific egg identification and rates of total and interspecific parasitization, helps study the evolution of nest parasitism. This model forecasts that only low costs of inter- and intraspecific parasitism leads to interspecific parasitism, the cost of which should be lesser than the cost of offspring competition. Total interspecific nest parasitism occurs when its cost is higher than the decrease in survival rate.

Models, Birds, Bird eggs, Bird nests, Parasitism

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The Lack clutch in a communal breeder: lion litter size is a mixed evolutionarily stable strategy

Article Abstract:

The maximal litter size in lions is frequency-dependent and the observed distribution is adaptive. Productivity of a female's litter depends on the size of the litters of their companion. The communal upbringing is a discrete-strategy game in which big litter sizes can invade populations with small ones and vice-versa.

Usage, Behavior, Game theory, Lions

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