Premium
The use of field data to derive population statistics of multivoltine copepods 1
Author(s) -
Rigler F. H.,
Cooley J. M.
Publication year - 1974
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.1974.19.4.0636
Subject(s) - voltinism , instar , population , statistics , biology , zoology , ecology , hydrology (agriculture) , mathematics , larva , demography , geology , geotechnical engineering , sociology
The mean duration of each instar of planktonic copepods is obtained from field data only, by using the relation: where M n is the mean pulse time of instar n and t n is the duration of that instar. The method is used to calculate population statistics of univoltine populations from European lakes and of a multivoltine population of Skistodiaptomus oregonensis in a 0.5‐ha meromictic lake in southern Ontario. As a check on the method, development times of eggs, first nauplius, and second nauplius were determined in the laboratory and combined with in situ vertical distribution and water temperature data to give an independent estimate of in situ development times of these instars. The two compared favorably. Growth rate of S. oregonensis is not simply a function of temperature.