RT Journal Article
T1 Osmoregulatory Plasticity of Juvenile Greater Amberjack (Seriola dumerili) to Environmental Salinity
A1 Barany Ruiz, André
A1 Gilannejad, Neda
A1 Alameda-López, María
A1 Rodríguez-Velasquez, Liliana
A1 Astola, Antonio
A1 Martínez-Rodríguez, Gonzalo
A1 Roo, Javier
A1 Muñoz, Jose Luis
A1 Mancera, Juan Miguel
AB Osmotic costs in teleosts are highly variable, reaching up to 50% of energy expenditure in some. In several species, environmental salinities close to the isosmotic point (~15 psu) minimize energy demand for osmoregulation while enhancing growth. The present study aimed to characterize the physiological status related to osmoregulation in early juveniles of the greater amberjack, Seriola dumerili, acclimated to three salinities (15, 22, and 36 psu). Our results indicate that plasma metabolic substrates were enhanced at the lower salinities, whereas hepatic carbohydrate and energetic lipid substrates decreased. Moreover, osmoregulatory parameters, such as osmolality, muscle water content, gill and intestine Na+-K+-ATPase activities, suggested a great osmoregulatory capacity in this species. Remarkably, electrophysiological parameters, such as short-circuit current (Isc) and transepithelial electric resistance (TER), were enhanced significantly at the posterior intestine. Concomitantly, Isc and TER anterior-to-posterior intestine differences were intensified with increasing environmental salinity. Furthermore, the expression of several adeno-hypophyseal genes was assessed. Expression of prl showed an inverse linear relationship with increasing environmental salinity, while gh mRNA enhanced significantly in the 22 psu-acclimated groups. Overall, these results could explain the better growth observed in S. dumerili juveniles kept at salinities close to isosmotic rather than in seawater.
YR 2021
FD 2021
LK https://hdl.handle.net/20.500.14352/98006
UL https://hdl.handle.net/20.500.14352/98006
LA eng
NO Barany, A.; Gilannejad, N.; Alameda-López, M.; Rodríguez-Velásquez, L.; Astola, A.; Martínez-Rodríguez, G.; Roo, J.; Muñoz, J.L.; Mancera, J.M. Osmoregulatory Plasticity of Juvenile Greater Amberjack (Seriola dumerili) to Environmental Salinity. Animals 2021, 11, 2607. https://doi.org/10.3390/ani11092607
NO European Commission
NO Ministerio de Economía y Competitividad (España)
DS Docta Complutense
RD 23 dic 2025