Survival and Level of Thyroid Hormones and Ions in Armored Catfish (Loricariidae) at Increasing Water Salinity
— The paper presents the results of the study of survival, the concentrations of thyroid hormones and ions of armored catfish of the genus Pterygoplichthys at increasing salinity of water. A stepwise (every two days) increase in water salinity from 0 to 12.5‰ leads to a significant increase in the c...
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Published in: | Journal of ichthyology 2022-12, Vol.62 (6), p.1201-1207 |
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Main Authors: | , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | —
The paper presents the results of the study of survival, the concentrations of thyroid hormones and ions of armored catfish of the genus
Pterygoplichthys
at increasing salinity of water. A stepwise (every two days) increase in water salinity from 0 to 12.5‰ leads to a significant increase in the concentration of Na
+
, K
+
, Cl
–
, Ca
2+
ions in the blood of fish, but does not affect the level of thyroid hormones (free and total triiodothyronine, thyroxine) and the calculated ratio of these hormones. The data indicate a low involvement of the thyroid gland in the osmoregulation of armored catfish. It is confirmed that some specimens of armored catfish can tolerate water salinity up to 15‰ for 2 days. The possibility of dispersal of armored catfish along estuaries to neighboring river systems is discussed. |
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ISSN: | 0032-9452 1555-6425 |
DOI: | 10.1134/S0032945222060054 |