What is the example of life history?
Examples of some major life history characteristics include: Age at first reproductive event. Reproductive lifespan and ageing. Number and size of offspring.
What do you mean by life history discuss?
Life histories are how organisms grow, survive, and reproduce over time. Organisms face many trade-offs between growing, surviving, and reproducing. These trade-offs are key to understanding the diversity of life histories in the world.
What are life history variables?
The participants were also asked to provide information concerning the following seven (independent) life-history variables: sex, age, birth order, number of siblings, parental status, reproductive goal (the minimum and maximum number of biological offspring participants wanted to have), and subjective life expectancy.
What are the main principles of life history theory?
Life history theory attempts to understand how natural selection designs organisms to achieve reproductive success, given knowledge of how selective factors in the environment (i.e., extrinsic mortality) and factors intrinsic to the organism (i.e., trade-offs, constraints) affect survival and reproduction.
How is the life history of an organism determined?
The life history of an organism is its pattern of survival and reproduction, along with the traits that directly affect survival and the timing or amount of reproduction. Rates of survival and reproduction can be estimated across age classes, or across different stages in organisms with complex life cycles.
How is the theory of life history based?
Life-history theory is based on the premise that organisms face trade-offs arising from energetic, physiological, developmental, or genetic constraints and that these trade-offs affect the patterns we observe in nature.
What are the traits of a life history?
Life history traits include growth rate; age and size at sexual maturity; the temporal pattern or schedule of reproduction; the number, size, and sex ratio of offspring; the distribution of intrinsic or extrinsic mortality rates (e.g., patterns of senescence); and patterns of dormancy and dispersal.
What do you mean by pattern in math?
Lesson Summary. Let’s review by going back over all our terms for understanding patterns in math. A pattern is a series or sequence that repeats. Math patterns are sequences that repeat based on a rule, and a rule is a set way to calculate or solve a problem.