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A mathematical model for the survivorship curve
Author(s) -
Murai Minoru
Publication year - 1967
Publication title -
population ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 59
eISSN - 1438-390X
pISSN - 1438-3896
DOI - 10.1007/bf02514915
Subject(s) - survivorship curve , competition (biology) , contest , biology , scramble competition , type (biology) , function (biology) , cohort , statistics , demography , ecology , mathematics , evolutionary biology , genetics , cancer , political science , law , sociology
Summary A mathematical function describing the various kinds of survivorship curve is formulated with the useful parameter, environmental capacity. Three types of the survivorship curve illlustrated by Deevey can be obtained from changing the value of this function. When a cohort is large and the competition occurs in the scramble type, this function shows the third type of Deevy 's and this to the first type in the case of low density and the contest type of competition. But the second type would rather be obtained by the action of density independent agencies.