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Fig. 3 | Fisheries and Aquatic Sciences

Fig. 3

From: The systematic sampling for inferring the survey indices of Korean groundfish stocks

Fig. 3

Illustration that the estimate of the survey index from the systematic sampling could be less precise than that from the simple random sampling. a shows the sampling units in number (i.e., ysis in number) of stock 3 (Pacific herring, Clupea pallasii) along the sequential order from the 2014 fall survey while b displays the corresponding dsis. c and d are the counterparts for stock 1 (Pacific cod, Gadus macrocephalus)

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