The monthly variations of blood characteristics and RNA/DNA of black sea bream, Acanthopagrus schlegeli, habituated in Geojae costal area were analysed to determine health condition of natural stocks in terms of gonad maturation and spawning season from March 2010 to February 2011. Spawning season determinated by gonadosomatic index is from June to August. RNA/DNA ratio of black sea bream muscle was strongly correlated with spawning season. During the gonad maturation RNA/DNA ratio in dorsal muscle tissue was decreased contrast to rapid increase during spawning season. Blood composition factors increased in terms of gonad maturation are aspartate aminotransferase, cholesterol, triglyceride, total protein, glucose, globulin, alkaline phosphatase and inorganic phosphate. Other blood factors increased during spawning season are alanine aminotransferase, blood urea nitrogen, uric acid and lactate dehydrogenase.

Abstract
 1. 서 론
 2. 재료 및 방법
  2.1. 생태학적 특성 조사
  2.2. 혈액특성 조사
  2.3. RNA/DNA 및 단백질 분석
 3. 결 과
  3.1. 체중 및 체장
  3.2. 생식소 및 간중량 지수
  3.3. RNA/DNA 및 단백질 농도
  3.4. 혈액학적 특성
 4. 고 찰
 참 고 문 헌

• 김수경(국립수산과학원 서해수산연구소) | Su-Kyoung Kim (West Sea Fisheries Research Institute, NFRDI)
• 심나영(국립수산과학원 서해수산연구소) | Na-Young Shim (West Sea Fisheries Research Institute, NFRDI)
• 윤성종(수산자원사업공단 수산종묘실) | Seong-Jong Yoon (Korea Fisheries Resources Agency) Corresponding author
• 김대현(수산자원사업공단 수산종묘실) | Dae Hyun Kim (Korea Fisheries Resources Agency)
• 이도현(수산자원사업공단 수산종묘실) | Do-Hyun Lee (Korea Fisheries Resources Agency)