RT journal article
T1 Osmoregulatory Plasticity of Juvenile Greater Amberjack (Seriola dumerili) to Environmental Salinity
A1 Barany Ruiz, Andre
A1 Gilannejad, Neda
A1 Alameda-López, María
A1 Rodríguez-Velásquez, Liliana
A1 Astola González, Antonio
A1 Martínez-Rodríguez, Gonzalo
A1 Roo, Javier
A1 Muñoz, José Luis
A1 Mancera Romero, Juan Miguel
A2 Biología
A2 BiomedicinaBiotecnología y Salud Pública
K1 intestine
K1 ion transport
K1 metabolism
K1 Na+/K+-ATPase
K1 osmoregulation
K1 Ussing chambers
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 (similar to 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.
PB MDPI
SN 2076-2615
YR 2021
FD 2021-09
LK http://hdl.handle.net/10498/25821
UL http://hdl.handle.net/10498/25821
LA eng
NO This research was funded by Project "Diversificacion de la Acuicultura Espanola mediante la optimizacion del cultivo de Seriola dumerili" JACUMAR 2016 (MAPAMA) and Fondo Europeo Maritimo y de Pesca (FEMP). The authors (A.B. and J.M.M.) belong to the FishWelfare and Stress Network (AGL2016-81808-REDT), supported by the Agencia Estatal de Investigacion (MINECO, Spanish Government).
DS Repositorio Institucional de la Universidad de Cádiz
RD 21-sep-2026