title: Survival Rate and Hematological Responses with Temperature Changes of Red Spotted Grouper, Epinephelus akaara in South Korea.
abstract: The effect of sudden changes of water temperature (WT) on the survival rate and physiological responses of the red spotted grouper (Epinephelus akaara) were examined by manipulating WT control system for 9 days. Experimental condition was divided in two different regimes at low (from 10°C to 4°C, decreased 1℃/d) and high (from 28°C to 34°C, increased 1°C/d) WT. Survival rate of experimental fishes were observed, and determined the changes of hematological characteristics by analyzing plasma levels of cortisol, glucose, total protein, and electrolytes (Na(+), Cl-, K(+)). No mortality was observed until low WT 6°C (144 h) and high WT 32°C (96 h), and 100% mortality was observed at low WT 4°C (216 h) and high WT 35°C (171 h). Plasma levels of cortisol and glucose increased rapidly as decreasing WT, and the loss of swimming ability and respiration response was observed at low WT 7°C and high WT 34°C conditions.
authors.affiliation: Aquaculture Research Division, Aquaculture Research Department, NIFS, Busan 46083, Korea.
authors.forename: Jong Youn
authors.initials: JY
authors.lastname: Park
authors.affiliation: Chonnam National University, Yeosu 89626, Korea.
authors.forename: Kyeong Ho
authors.initials: KH
authors.lastname: Han
authors.affiliation: Aquaculture Research Division, Aquaculture Research Department, NIFS, Busan 46083, Korea.
authors.forename: Jae Kwon
authors.initials: JK
authors.lastname: Cho
authors.affiliation: South Sea Fisheries Research Institute, NIFS, Yeosu 89780, Korea.
authors.forename: Kyong Min
authors.initials: KM
authors.lastname: Kim
authors.affiliation: South Sea Fisheries Research Institute, NIFS, Yeosu 89780, Korea.
authors.forename: Maeng Hyun
authors.initials: MH
authors.lastname: Son
authors.affiliation: Native Fish Business Center, Gyeongsangbuk-do Fishery Resources Development Institute, Uiseong 37366, Korea.
authors.forename: Jae Min
authors.initials: JM
authors.lastname: Park
authors.affiliation: East Sea Fisheries Research Institute, NIFS, Gangneung 25435, Korea.
authors.forename: Hee Woong
authors.initials: HW
authors.lastname: Kang
keywords: Hematological; Physiological responses; Red spotted grouper (Epinephelus akaara); Survival rate; Temperature changes