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Physiological indicators of salinity stress in the grey mullet, Mugil cephalus, Linnaeus, 1758 juveniles

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Abstract

Grey mullet (Mugil cephalus) juveniles were subjected to salinity stress in order to determine physiological response and recovery. Variations in the most important blood physiological indicators of stress (i.e., cortisol and glucose) were analyzed after application of stress. According to the results, the concentration of cortisol increased significantly 30 min after delivery of fish to water with 15 and 25 ppt salinities. The elevated levels of cortisol returned to basal levels 60 min after application of stress (P > 0.05). Plasma cortisol and glucose did not show significant changes after delivery of fish to water with 35 ppt salinity (P > 0.05). The elevation of plasma glucose occurred 30 and 60 min after delivery of fish to water with 15 and 25 ppt salinities (P > 0.05). Our study demonstrated that low salinities are stressful for grey mullet juveniles.

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Acknowledgments

The authors express their sincere appreciation to Offshore Fisheries Research Center, Chabahar, Iran, for providing of fish and facilities for this study.

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Authors and Affiliations

  1. Department of Aquaculture, Islamic Azad University-Guilan Science and Research Branch, Rasht, P.O. Box: 41635-4196, Iran

    Mehrak Mohamadi

  2. Department of Fishery Sciences, Islamic Azad University, Tehran Shomal Branch, Tehran, Iran

    Gholam Reza Bishkoul

  3. Shahid Motahari Fisheries Research Center of Yassuj, Yassuj, Iran

    Abulhasan Rastiannasab

  4. Department of Fishery Science, Faculty of Natural Resources, Islamic Azad University of Lahijan, P.O. Box 1616, Lahijan, Iran

    Hossein Khara

  5. Department of Fisheries, Khazar University, Mahmood abad, Mazandaran, Iran

    Nasir Hut

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  1. Mehrak Mohamadi
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  2. Gholam Reza Bishkoul
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  3. Abulhasan Rastiannasab
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  4. Hossein Khara
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  5. Nasir Hut
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Correspondence to Nasir Hut.

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Mohamadi, M., Bishkoul, G.R., Rastiannasab, A. et al. Physiological indicators of salinity stress in the grey mullet, Mugil cephalus, Linnaeus, 1758 juveniles. Comp Clin Pathol 23, 1453–1456 (2014). https://doi.org/10.1007/s00580-013-1804-7

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  • DOI: https://doi.org/10.1007/s00580-013-1804-7

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