High hydrostatic pressure effects on arginine vasotocin levels in fish
Autor: | João Coimbra, Jonathan M. Wilson, Jesús M. Míguez, Arnau Rodríguez-Illamola |
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Rok vydání: | 2020 |
Předmět: |
0106 biological sciences
endocrine system 0303 health sciences Arginine Vasotocin Ecology QH301-705.5 Hydrostatic pressure Zoology Aquatic Science Biology Oceanography Microbiology 010603 evolutionary biology 01 natural sciences Acclimatization QR1-502 03 medical and health sciences Fish Rainbow trout Biology (General) Ecology Evolution Behavior and Systematics 030304 developmental biology |
Zdroj: | Aquatic Biology, Vol 29, Pp 165-173 (2020) |
ISSN: | 1864-7790 1864-7782 |
Popis: | The present study investigates the response of the hormone arginine vasotocin (AVT), the non-mammalian antidiuretic hormone, to the acclimation of fish to high hydrostatic pressure (5.1 MPa). Two fish species with different osmoregulatory strategies, the lesser spotted dogfish Scyliorhinus canicula, a marine osmoconforming chondrichthyan species adapted for migration to deep waters, and the rainbow trout Oncorhynchus mykiss, a pressure-sensitive freshwater species, were selected for study. Fish were exposed to hydrostatic pressures of either 0.1 (control) or 5.1 MPa in hydrostatic chambers for up to 2 wk at their appropriate salinities. Plasma cortisol was measured in trout, and plasma chloride, sodium and potassium were measured in both fish species. A transient high level of plasma AVT was found in dogfish and in trout after 1 and 3 d of exposure to high hydrostatic pressure, which returned to basal levels by 14 d of exposure. In contrast, pituitary AVT content was reduced after short-term exposure in dogfish, while in trout, lower expression was found in high pressure than in control conditions, independently of exposure time. In dogfish, pituitary AVT levels recovered by 14 d under high hydrostatic pressure. No changes in plasma cortisol (trout) or ions (both species) were observed. These initial increases of the AVT release from the pituitary during fish acclimation to high pressure suggest that it works as a physiological short-term response to reduce water loss and equilibrate ion osmotic balance. |
Databáze: | OpenAIRE |
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