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Estimation of Fur Seal Pup Populations by Randomized Sampling
Author(s) -
Chapman Douglas G.,
Johnson Ancel M.
Publication year - 1968
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1968)97[264:eofspp]2.0.co;2
Subject(s) - statistics , sampling (signal processing) , sampling design , randomness , sample (material) , variance (accounting) , population , estimation , sample size determination , econometrics , population mean , mathematics , computer science , engineering , demography , economics , chemistry , accounting , systems engineering , filter (signal processing) , chromatography , estimator , sociology , computer vision
It is well known that usual tag‐sample estimates are valid if it can be assumed that the sampling process is random with respect to the presence or absence of the tag. This may occur because of natural processes or it may be the result of deliberate design of the experiment either in the tagging phase or in sampling, or in both. Procedures of this type, which have been applied to estimate the population of young Pribilof fur seals, are discussed. Particular consideration is given to variance estimates, comparisons of sample size, and methods of determining the randomness of allocation of the tags.