Prioritizing the nutrients of grouper fish for feed formulation using inversely proportional to the variance and weighted sum of Z-scores

Abstract

Grouper fish requires several important nutrients such as crude protein, crude fibre and calcium to maintain its healthiness and growth. However, it is very hard to determine the priority of the nutrients in order to formulate the grouper feed. Therefore, in this paper, the priority of the nutrients is investigated using two methods which are optimal characteristic of inversely proportional to the variance and weighted sum of z-scores. Data was collected from 30 manufactures of grouper fish feed meal and analysis were done by using inversely proportional to the variance and weighted sum of z-scores respectively via SPSS, Statdisk Software and Microsoft Excel. Result shown that weighted sum of z-scores is more appropriate and better method compare with inversely proportional to the variance. The priority of nutrients using weighted sum of z-scores are crude ash, follow by crude protein, phosphorus, crude fat, crude fibre and calcium. This vital information can be considered in such as further study in formulating the nutrients for grouper fish feed.