Evaluation offish Flesh and Profitability of Black Porgy (Acanthopagrus schlegeli) Cultured in Freshwater

The objective of this study was to evaluate food value and profitability of black porgy (Acanthopagrus schlegeli) cultured in freshwater. In fish flesh, muscular hardness of black porgy reared in freshwater $(9210{\pm}1215g/cm^2)$ was slightly lower than those of fish in seawater $(9987{\pm}6549g/cm^2)$, but there was no significant difference. Also, there was no difference between muscular strength of fish reared in freshwater and seawater. When the flesh qualities of black porgy reared in freshwater was compared with those of fish reared in seawater through the questionnaire, there were no significant differences between fish reared in freshwater and seawater in appearance, texture, taste and flavor. For 10 months of black porgy culture in fresh water, the gross profit in culturing from juvenile (5.5 g) to adult size (100g), and from adult to marketable size (400 g) were 24,000,000 won (30.0%) and 53,870,000 won (36.9%), respectively.

담수양식 감성돔(Acanthopagrus schlegeli)의 어육평가 및 수익성 분석

해산어류인 감성돔의 담수사육에 따른 어육을 평가하기 위하여 근육의 경도와 강도를 조사하였으며, 설문조사를 통한 어육의 외관, 질감, 맛 및 냄새를 분석하였다. 또한 수익성분석을 위해 치어 및 육성어를 10개월간 양식하여 각각의 순수익(률)을 산출하였다. 담수사육 감성돔 근육의 경도 및 강도는 각각 $9210{\pm}1215g/cm^2,\;30693{\pm}6355g/cm^2$로 해수사육의 $9987{\pm}1893g/cm^2,\;31931{\pm}6549g/cm^2$보다 다소 낮았으나 유의한 차이는 없었다. 또한 설문조사한 결과, 어육의 외관, 질감, 맛 및 냄새에서도 담수 및 해수사육한 감성돔사이에 차이가 없는 것으로 나타났다. 감성돔 치어 및 육성어를 담수에서 10개월간 양식하였을 때 순수익(률)은 각각 24,000,000원(30.0%), 53,870,000원(36.9%)으로 나타났다.