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# Birth Flow vs Birth Pulse

First of all we must assume that all reproduction occurs at the mid-point of an age-class. The m x values are appropriate for the end of an x class - not at the middle - need get average. To get at average of m x and m x+1 = (m x-1 + m x )/2. Birth Flow vs Birth Pulse. Télécharger la présentation ## Birth Flow vs Birth Pulse

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1. First of all we must assume that all reproduction occurs at the mid-point of an age-class. The mx values are appropriate for the end of an x class - not at the middle - need get average. To get at average of mx and mx+1 = (mx-1 + mx)/2 Birth Flow vs Birth Pulse

2. This is the basic life table (birth pulse) that we have constructed so far: projections are based on m. MUST ADJUST m

3. These values of mx now get used in projections of your population NOTE - px values used in the life tables, and calculations therein, do not change. I.e. px (birth-flow) = px (birth-pulse) and the revised px values above are only used to calculate mx values.

4. Pulse Flow Stable R Stable R

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