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Comparison of Digestive Organ and Body Composition among the Cultured, Wild and Released Fish, 1-Year Black Sea Bream (Acanthopagrus schlegeli)

양식, 방류 및 자연산 감성돔 1년어의 소화기관 및 체성분 비교

  • JI Seung Cheol (Fisheries Laboratory, Kinki University) ;
  • Yoo Jin Hyung (Jeilfeed Company Ltd) ;
  • JEONG Gwan Sik (Department of Aqua Life Science, Yosu National University) ;
  • MYEONG Jeong Gu (Marine Resources Laboratory, Korea Ocean Research & Development Institute) ;
  • LEE Si Woo (Department of Aqua Life Science, Yosu National University) ;
  • GO Hyeon Jeong (Department of Aqua Life Science, Yosu National University)
  • Published : 2004.12.01

Abstract

In order to evaluate adaptation to the environment in released fish, digestive organ and body composition were compared among 1-year old cultured (CUL), released (REL) and wild (WIL) Black Sea Bream, Acanthopagrus schlegeli. Hepatosomatic index (HSI) of the REL was significantly lower than those of the CUL and WIL fish, but intestine weight index (IWI) of REL was significantly higher than those of the CUL and WIL fish. There were no significant differences in stomach weight index (SWI) and condition facto. (CF) among those different fish groups. The number of pyloric caeca of the REL and WIL fish were 4, but the $30{\%}$ of CUL fish was 3 counts. The moisture content of whole body in the WIL fish was significantly higher than the CUL and REL fish, but significant lowest in the crude lipid of whole body. The content of moisture and crude protein of dorsal muscle were no significant differences among the CUL, REL and WIL fish, but crude lipid content of WIL fish was significantly lower than the CUL and REL fish. Moisture content of CUL fish in the liver was significantly lower than the REL and WIL fish, and crude lipid was significant lowest in the WIL fish. Amino acid content of dorsal muscle in the WIL fish was highest in the total amino acid, EAA and E/A ratio, and CUL fish was highest EAA and E/A ratio in liver. EPA content in dorsal muscle of WIL fish was lower than CUL and REL fish, and the REL fish was highest in DHA content of the fatty acid. EPA content in liver of WIL fish was lower than CUL and REL fish, and DHA content in REL and WIL fish was highest and lowest. Crude protein content of CUL and WIL fish in the scale was significantly higher than REL fish, but there were no significant differences in contents of crude lipid and ash. Ca and P of scale were formed most of mineral and content of P in CUL fish was significantly higher than those of REL and WIL fish. There were no significant differences in Mg, K, Na and S of scale, but CUL fish was significantly lower than REL fish in C1. The results suggest that difference of digestive organs and body composition concluded it from differences of inhabitation environment and feed formulations.

Keywords

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