TY - JOUR
T1 - Impact of fish density on water quality and physiological response of golden pompano (Trachinotus ovatus) flingerlings during transportation
AU - Hong, Jiawei
AU - Chen, Xu
AU - Liu, Sixun
AU - Fu, Zhengyi
AU - Han, Mingyang
AU - Wang, Yifu
AU - Gu, Zhifeng
AU - Ma, Zhenhua
PY - 2019/5/30
Y1 - 2019/5/30
N2 - To understand the effects of fish density on water quality and physiological changes of golden pompano (Trachinotus ovatus) fingerlings during transportation, fish were stocked at three densities (27 kg/m3, 54 kg/m3 and 81 kg/m3) for 8 h using the method of anesthesia hypothermia in sealed containers. The fish reared in the recycling system were used as the control. The pH of water at three fish densities was significantly lower than the initial value and decreased gradually with the increase of fish density. The lowest pH and ammonia nitrogen were found in the 81 kg group, reaching 6.24 and 0.08 mg/L, respectively. The liver catalase activity increased gradually but was still significantly lower than that in the control. The liver peroxidase activity fell gradually corresponding to the increase of fish density but was higher than that in the control. Fish density during transportation did not affect the lactate dehydrogenase activity in the liver. After 8-h transportation, fish in all three groups had a lower level of glucose and creatinine in the serum than in the control fish. The content of serum cortisol soared after transportation, but no significant difference was found among three fish densities. Glutamate pyruvate transaminase and glutamic oxaloacetic transaminase activities in the serum had a similar pattern to those of the fish in the control and showed a gradual reduction with increasing fish density. Fish density during transport significantly affected water quality (e.g., pH and NH3-N) and liver function. Our results indicate that the fish density of 81 kg/m3 is safe to transport golden pompano fingerlings for 8 h.
AB - To understand the effects of fish density on water quality and physiological changes of golden pompano (Trachinotus ovatus) fingerlings during transportation, fish were stocked at three densities (27 kg/m3, 54 kg/m3 and 81 kg/m3) for 8 h using the method of anesthesia hypothermia in sealed containers. The fish reared in the recycling system were used as the control. The pH of water at three fish densities was significantly lower than the initial value and decreased gradually with the increase of fish density. The lowest pH and ammonia nitrogen were found in the 81 kg group, reaching 6.24 and 0.08 mg/L, respectively. The liver catalase activity increased gradually but was still significantly lower than that in the control. The liver peroxidase activity fell gradually corresponding to the increase of fish density but was higher than that in the control. Fish density during transportation did not affect the lactate dehydrogenase activity in the liver. After 8-h transportation, fish in all three groups had a lower level of glucose and creatinine in the serum than in the control fish. The content of serum cortisol soared after transportation, but no significant difference was found among three fish densities. Glutamate pyruvate transaminase and glutamic oxaloacetic transaminase activities in the serum had a similar pattern to those of the fish in the control and showed a gradual reduction with increasing fish density. Fish density during transport significantly affected water quality (e.g., pH and NH3-N) and liver function. Our results indicate that the fish density of 81 kg/m3 is safe to transport golden pompano fingerlings for 8 h.
KW - Golden pompano fingerlings
KW - Physiological responses
KW - Transport densities
KW - Water quality
UR - http://www.scopus.com/inward/record.url?scp=85064513761&partnerID=8YFLogxK
U2 - 10.1016/j.aquaculture.2019.04.040
DO - 10.1016/j.aquaculture.2019.04.040
M3 - Article
AN - SCOPUS:85064513761
SN - 0044-8486
VL - 507
SP - 260
EP - 265
JO - Aquaculture
JF - Aquaculture
ER -
