Effects of salinity on gills’ chloride cells, stress indices, and gene expression of Asian seabass (Lates calcarifer, Bloch, 1790)

• Published in: Fish physiology and biochemistry 2021-12, Vol.47 (6), p.2027-2039
• Main Authors: Azodi, Maryam, Bahabadi, Mahmoud Nafisi, Ghasemi, Ahmad, Morshedi, Vahid, Mozanzadeh, Mansour Torfi, Shahraki, Raheleh, Khademzadeh, Omid, Hamedi, Shirin, Avizhgan, Sakineh
• Format: Article
• Language: English
• Subjects: Acclimation; Acclimatization; Animal Anatomy; Animal Biochemistry; Animal Physiology; Animals; Aspartate aminotransferase; Biological stress; Biomedical and Life Sciences; Chlorides; Chlorides - blood; Fish; Fresh water; Freshwater; Freshwater & Marine Ecology; Freshwater fish; Freshwater fishes; Gene Expression; Gills; Growth factors; Histology; Hormones; Hsp70 protein; IL-1β; Individual rearing; Inland water environment; Insulin; Interleukins; Juveniles; Lates calcarifer; Life Sciences; Liver; Lysozyme; Marine fishes; Morphology; Osmoregulation; Perciformes - physiology; Potassium; Salinity; Salinity effects; Sea bass; Serum; Sodium; Water salinity; Zoology
• ISSN: 0920-1742; 1573-5168
• DOI: 10.1007/s10695-021-01024-6

A 2-week research was carried out to assess water salinity (WS) effects including 0, 15, 35, and 50‰ on osmoregulatory mechanisms and stress indices in Asian sea bass (34.4 g) juveniles. Except for fish reared at 50‰, in the other treatments, it gradually decreased to the prescribed WS during a 10-day period (− 5‰ a day). After a 10-day acclimation period, fish were reared at the prescribed WS for 2 weeks. Fish reared at 15 and 35‰ had higher chloride cell (CC) counts in the interlamellar region. The number of CC in the interlamellar region elevated with increment of WS up to 35‰, but they were pronouncedly reduced in 50‰ group. The diameter of CC in the interlamellar region was not affected by WS. The smallest nucleus diameter of CC in the interlamellar region was observed in fish reared at 15‰ ( P