Statistical Methods

Unit 10 - Estimation of Total Marine Fish Landings

10.3.Sampling for second stage units
On the day of observation at the selected, landing centre, if the number of fishing units that land their catches is 10 or less, then, the data on all the units is collected. If the number of fishing units exceeds 10, a sample of boats is selected in a predetermined manner. Thus fishing units form the 2nd stage units on which data on species-wise catch, effort, craft, and gear etc., are recorded.