Overstock in aquaculture is a matter of concern in aquaculture management. To sort fish based on fingerling size in case of overstocking is an important problem in aquaculture farm.
This study aims to determine the amount of fry overstock and sorting time in aquaculture farm. This study builds a mathematical model that finds the value of decision variables to optimize objective function summing up the fingerling purchasing cost, aquaculture farm operating cost and feeding cost under mortality and farming period constraints.
The proposed mathematical model involves following biological and economical variables and coefficients: (1) number of fingerlings, (2) sorting time, (3) fish growth rate and variation, (4) mortality, (5) price of a fry (6) feeding cost, and (7) possible sorting periods. Numerical simulation is presented herein. The objective of numerical simulation is to provide decision makers to analyse and comprehend the proposed model. When extensive biological data about growth function of fry becomes available, the proposed model can be widely applicable to real aquaculture farms.

Abstract
 Ⅰ. 연구의 배경
 Ⅱ. 모형의 설정
  1. 의사결정 문제의 개념적 성격
  2. 개념적 모형의 구축
 Ⅲ. 수치모형의 구축과 분석
 Ⅳ. 결 론
 REFERENCES

• 어윤양(부경대학교 경영학부) | Youn-Yang EH (Division of Business Administration, Pukyong National University) Corresponding author
• 송동효(부경대학교 경영학부) | Dong-Hyo Song (Division of Business Administration, Pukyong National University)