Effects of Water Temperature and Salinity on Blood Properties and Oxygen Consumption in Hagfish (Eptatretus burgeri)

Abstract

Hagfish Eptatretus burgeri is classified as a agnathans and has many different physiological properties compared with vertebrates. In this study, we examined effects of water temperature and salinity on blood properties and oxygen consumption in hagfish. In the experiment of water temperature change, hematocrit (Ht), red blood cell (RBC) and glucose of hagfish blood revealed the lowest values at 15. Oxygen ℃ consumption of hagfish had significantly increased with rising water temperature, and the increasing rate was twice as much when the temperature was manipulated every 5. Also, oxygen consumption during ℃ the night time (a short photoperiod) was significantly higher than that of the daytime. Q10 level was 3.50 in the light period and 3.92 in the dark period. No significant change in plasma glucose level was showned in changing salinity from 30 psu to 22 psu, while it had rapidly increased at 20 psu (13.7±4.0 mg/dL) and thereafter all hagfish were dead at 18 psu. However, osmolarity, Na+, K+ and Cl-levels had significantly decreased when salinity decreased. This results are expected to develop the artificial rearing techniques of natural hagfish.

Survival Rate and Hematological Responses with Temperature Changes of Red Spotted Grouper, Epinephelus akaara in South Korea

“…In addition, the level of metabolism is decreased, and blood electrolyte levels are also affected by external factors ( Ishioka, 1980 ; Robertson et al, 1987 , 1988 ; Davis & Parker, 1990 ). In the present study, the decreasing temperature treatment failed to induce any significant changes in electrolyte levels, whereas the increasing temperature treatment resulted in increased Cl– levels, as previously reported by Do et al ( 2014 ). However, no significant changes were observed for Na + or K + .…”

Changes on Hematological Factors and Oxygen Consumption of Korean Rockfish Sebastes schlegeli in High Water Temperature

“…포함한 생리학적 조절 능력에 영향을 준다고 알 려져 있다 (Kim et al, 2001 (Chang et al, 2005;Byun et al, 2008;Pirozzi and Booth, 2009;Do et al, 2014 (Davis and Parker, 1990 (Davis and Parker 1990;Ishioka, 1980 (Chang et al, 1999;Do et al, 2014 차이를 보였다 (Requena et al, 1997;Chang et al, 2005;Jeong et al, 2007;Byun et al, 2008;Do et al, 2014…”