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Optimal allocation of effort in studies using the size‐frequency method of estimating secondary production
Author(s) -
Heisey Dennis M.,
Hoenig John M.
Publication year - 1986
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.1986.31.1.0211
Subject(s) - variance (accounting) , sampling (signal processing) , sample size determination , statistics , optimal allocation , production (economics) , sample (material) , imperfect , mayfly , computer science , mathematics , econometrics , mathematical optimization , ecology , economics , telecommunications , linguistics , chemistry , philosophy , accounting , nymph , chromatography , detector , biology , macroeconomics
Secondary production estimates based on the size‐frequency method can be improved through the use of optimal sample allocation without increasing the total sampling effort. We advocate a two‐step procedure. First, sampling dates should be chosen to minimize bias. Then, sample sizes on each date should be allocated in such a way as to minimize variance. Calculating the optimal sample allocation requires some prior variance information, but even rather imperfect information will usually result in improved estimates. An example is presented using published data on the mayfly Ephemerella dorothea.