How do survivorship curves show three types of reproductive strategies?

Question

Peyton Budinger · Accepted Answer

The related mathematics help to demonstrate the relationship between reproductive strategies and lifecycles. Reproductive strategies affect the Type I and Type III curves the most.

Three types of survival curves fit the data: Type I curves have a low death rate in the early and middle stages of life but a steep increase in old age; Type II curves show a death rate that is more constant over the course of a species' lifetime; and Type III curves show high early death rates but a slowing death rate for those who have made it through the early stage. Reading_SurvivorshipCurves.xml can be found at https://tutor.hix.ai The foundation of every life table is its survival and fecundity schedule, from which a multitude of other data can be derived, such as age-specific rates of mortality, fecundity, survivorship curves, life expectancy, generation time, net reproductive rate, and intrinsic rate of increase (https://tutor.hix.ai).

Vivian Ahern · Answer

undefined Survivorship curves show three types of reproductive strategies by illustrating the relationship between the number of individuals alive over time. Type I curves indicate low mortality early in life, typical of species with few offspring and high parental care. Type II curves show a constant mortality rate across all ages, common in species with moderate levels of parental care and offspring survival. Type III curves depict high mortality early in life, characteristic of species with many offspring but low parental care.