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NTIS 바로가기水産海洋敎育硏究 = Journal of fisheries and marine sciences education, v.27 no.2 = no.74, 2015년, pp.526 - 536
김문진 (씨-라이프 부산아쿠아리움) , 임한규 (국립목포대학교) , 정민환 (국립수산과학원)
Changes of oxygen consumption in juvenile giant grouper, Epinephelus lanceolatus were investigated in order to find out the physiological responses associated with freshwater and low salinities acclimation. Salinity changes in this experiment were set as follows; 35 psu (Exp. I) as control, decrease...
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핵심어 | 질문 | 논문에서 추출한 답변 |
---|---|---|
어류의 산소소비가 달라지는 요인은 무엇이 있는가? | 특히 제한된 공간속의 어류는 빈산소 환경에서 호흡곤란을 일으켜 죽는 경우가 발생하기 때문에 어류 양식장에서 산소공급은 중요한 관리사항 중 하나이다. 어류의 산소소비는 수온(Brett and Glass, 1973; Wi and Chang, 1976), 염분(Rao, 1971; Forsberg, 1994), 광주기(Withey and Saunders, 1973), 어체크기(Brett and Glass, 1973), 사료공급량(Brett and Groves, 1979) 및 스트레스(Smart, 1981; Barton and Schreck, 1987) 등 여러 가지 요인에 의해 달라지는 것으로 알려져 있다. 용존산소는 양식 어류의 못이나 탱크에서 생산량을 결정하는 데 매우 중요한 요인 중 하나이다(Erez et al. | |
용존산소의 특징은 무엇인가? | , 1991). 더욱이 용존산소는 어류양식에서 수용밀도를 결정(Kawamoto, 1977)하거나, 활어수송(Wi and Chang, 1976) 및 사료요구량 산정(Buentello et al., 2000)에 변수가 되고 있다. | |
대왕바리는 염분변화에 매우 강한 광염성 어종이며, 담수환경에 쉽게 적응할 수 있을 것으로 판단되는 이유가 무엇인가? | 대왕바리는 모든 실험 조건에서 암기 보다 명기에 많은 산소소비량을 보여, 주행성 어종인 것으로 추정되나, 명기와 암기의 산소소비량은 큰 차이를 보이지 않았다. 이상의 결과를 종합해 볼 때, 대왕바리 치어는 염분 저하 방법별 산소소비량에서 서로 차이를 보이지 않아 저염분 순화에 있어 생리적 문제는 발생하지 않았으며, 실험과정 중 폐사한 개체도 없었다. 따라서 대왕바리는 염분변화에 매우 강한 광염성 어종이며, 담수환경에 쉽게 적응할 수 있을 것으로 판단된다. |
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