Acta Ichthyologica et Piscatoria 29(1): 49-62, doi: 10.3750/AIP1999.29.1.05
The comparison of selected sampling methods for determining the age distribution of fish in the catches
expand article infoJ. Horbowy
Open Access
Computer simulations were employed to determine the efficiency of selected sampling methods used to determine the age composition of the catches. Both proportional (PROP) and stratified sampling schemes were analysed. In the stratified sampling, the efficiency of drawing a constant number of fish from the stratum (S_CON) as well as drawing a number of fish proportional to the product of the fish numbers and the standard deviation of age in the stratum (S_PROP*SD) were investigated. The S_PROP*SD sampling method was proven to be the most effective. The proportional sampling was shown to be the best when taking into consideration the sampling efficiency and the practical possibilities of implementation of a given drawing scheme.