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Estimation of mortality coefficients from field samples of zooplankton 1
Author(s) -
FAGER E. W.
Publication year - 1973
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.1973.18.2.0297
Subject(s) - estimation , zooplankton , statistics , mathematics , point estimation , field (mathematics) , biology , ecology , economics , management , pure mathematics
Point estimates of mortality of zooplankton in the field, based on relative numbers of individuals of different developmental stages observed in samples, require either a knowledge of the initial input of young or assumptions about constancy of input and constancy of mortality over adjacent stages. As the initial input is rarely known and the assumptions of constancy are probably often violated, the resulting uncertainty should be made evident in the estimates. This can be done by reporting the ranges of values of the mortality coefficients that would be consistent with the observed relative numbers of individuals. Methods of calculating these ranges are given.