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Interactive effects of temperature and salinity on the survival, oxidative stress, and Na+/K+-ATPase activity of newly hatched obscure puffer (Takifugu obscurus) larvae.

Abstract：

:Obscure puffer (Takifugu obscurus) is an anadromous fish widely distributed around the coastal and inland rivers in East Asia. T. obscurus often encounters fluctuations in temperature and salinity. This study aimed to investigate the effect of the interactions of temperature and salinity on survival and oxidative stress response of newly hatched T. obscurus larvae. A combination of three temperatures (19, 25, and 31 °C) and three salinities (0, 10, and 20 ppt) was applied for 96 h under laboratory conditions. The newly hatched larvae could not tolerate 31 °C for 96 h. No death was recorded at other temperatures during this experiment. Malondialdehyde concentrations increased significantly after 6 h of exposure to high salinity (10 and 20 ppt) and then decreased until the end of the experiment at each temperature. The highest superoxide dismutase activity was observed under the exposure to 20 ppt for 24 h at 31 °C. Na+/K+-ATPase activity significantly increased as salinity increased, especially at low temperatures. With the prolong of exposure time, the integrated biomarker response (IBR) values showed an increase until 48 h and then declined at 96 h in most treatments. The largest IBR value appeared when larvae were exposed to the highest temperature and salinity for 24 h. Our study indicated that high temperature with high salinity may negatively affect the early development of T. obscurus and their combined effects should be considered in the larvae culture.

journal_name

Fish Physiol Biochem

journal_title

Fish physiology and biochemistry

authors

Wang J,Hou X,Xue X,Zhu X,Chen Y,Yang Z

doi

10.1007/s10695-018-0537-6

subject

Has Abstract

pub_date

2019-02-01 00:00:00

pages

93-103

issue

1

eissn

0920-1742

issn

1573-5168

pii

10.1007/s10695-018-0537-6

journal_volume

45

pub_type

杂志文章

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