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An experimental test of the egg‐ratio method with instantaneous birth rate as an independent variable
Author(s) -
Bennett William N.,
Boraas Martin E.
Publication year - 1989
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1989.34.6.1120
Subject(s) - chemostat , steady state (chemistry) , statistics , rotifer , variable (mathematics) , mathematics , brachionus , population , biology , ecology , demography , mathematical analysis , chemistry , genetics , sociology , bacteria
The accuracy of three mathematical models that have been used to calculate instantaneous birth rate ( b ) from the ratio of eggs to females ( E ) in a population was determined with steady state populations of the rotifer Brachionus calycifllorus. Typically, b is calculated from E with these models. We were able to choose b as an independent variable, with the physical characteristics of our culture device (a two‐stage steady state chemostat), which also satisfied the major assumptions of the models. We then measured E and calculated b from E with the three models. The model of Paloheimo gave the best fit to these steady state data when the calculated b and observed b were compared.