J. Phys. I France 5 (1995) 1689-1695
Ageing: Parental Care and Reproduction StrategiesJohn Thoms, Peter Donahue, Doug Hunter and Naeem Jan
Physics Department, St. Francis Xavier University, Antigonish. Box 5000, Nova Scotia, B2G 2W5 Canada
(Received 15 August 1995, received in final form and accepted 18 August 1995)
The Penna bitstring model of biological ageing has been successfully used to illustrate senescence due to mutation accumulation. We introduce several new factors including parental care which produces a noticeable increase in the fitness and life expectancy of the population, a changing reproductive range which shows the distinct relationship between senescence and fertility, and semelparous individuals which produce several new observations such as a cyclic population.
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