Consideration of detectability and sampling in measuring biodiversity

Biodiversity is usually represented by species richness,diversity and evenness. many indices have been developed to measure the different aspects of biodiversity. but none of them has considered detectability and sampling technique in account. in our study we have introduced detectability in the usual indices in a way that is based on some specific sampling methods and we have estimated the population characteristics through sample while perceiving the effect of introducing detectability on these usual indices. significant differences have been observed by utilizing the line transect method and the capture-recapture method on locally collected data. the proposed method of considering detectability and sampling in measuring biodiversity are better than usual method of calculating indices. © 2010 pakistan journal of statistics.