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Parameters for Seasonally Breeding Populations
Vol. 48, No. 5 (Sep., 1967), pp. 834-839
Stable URL: http://www.jstor.org/stable/1933741
Page Count: 6
You can always find the topics here!Topics: Birth rates, Age distribution, Female animals, Mortality, Statistics, Animals, Breeding, Population parameters, Population growth rate, Population distributions
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Lotka's equations relating the parameters of populations with no seasonal trend in birth rates and Fisher's formula for @'reproductive value@' are modified to describe populations with restricted annual seasons of birth. The parameters @'net reproductive rate@' and @'mean generation length@' provide statistics and dubious utility for populations with overlapping generations. New definitions of birth rate and death rate are proposed whereby the relationships between the crude, finite and exponential rates are simplified. The use of these parameters is illustrated by statistics calculated for a population of sheep.
Ecology © 1967 Wiley