IMIS | Flanders Marine Institute
 

Flanders Marine Institute

Platform for marine research

IMIS

Publications | Institutes | Persons | Datasets | Projects | Maps
[ report an error in this record ]basket (0): add | show Printer-friendly version

Interaction of short-term testosterone treatment with osmotic acclimation in the gilthead sea bream Sparus auratus
Arjona, F.J.; Sangiao-Alvarellos, S.; Polakof, S.; García-López, A.; Martin del Rio, M.P.; Martínez-Rodríguez, G.; Soengas, J.L.; Mancera, J.M. (2008). Interaction of short-term testosterone treatment with osmotic acclimation in the gilthead sea bream Sparus auratus. Mar. Biol. (Berl.) 153(4): 661-671. http://hdl.handle.net/10.1007/s00227-007-0840-8
In: Marine Biology. Springer: Heidelberg; Berlin. ISSN 0025-3162, more
Peer reviewed article  

Available in  Authors 

Keyword
    Marine

Authors  Top 
  • Arjona, F.J.
  • Sangiao-Alvarellos, S.
  • Polakof, S.
  • García-López, A.
  • Martin del Rio, M.P.
  • Martínez-Rodríguez, G.
  • Soengas, J.L.
  • Mancera, J.M.

Abstract
    To assess the interaction between testosterone (T) treatment and acclimation to different salinities, seawater-acclimated gilthead sea bream (Sparus auratus) were implanted with slow-release coconut oil implants alone (control) or containing T (5 µg/g body mass). After 5 days, eight fish of control and T-treated groups were sampled. The same day, eight fish of each group were transferred to low salinity water (LSW, 6 ppt, hypoosmotic test), seawater (SW, 38 ppt, control test) and high salinity water (HSW, 55 ppt, hyperosmotic test) and sampled 9 days later. Gill Na+, K+-ATPase activity increased in HSW-acclimated fish with respect to SW- and LSW-acclimated fish in both control and T-treated groups. Kidney Na+, K+-ATPase activity was also enhanced in HSW-acclimated fish, but only in T-treated group. From a metabolic point of view, most of the changes observed can be attributed to the action of salinity and T treatment alone, since few interactions between T treatment and osmotic acclimation to different salinities were observed. Those interactions included in treated fish: in the liver, decreased capacity in using glucose in fish acclimated to extreme salinities; in the gills, decreased capacity in using amino acids in HSW; in the kidneys increased capacity in using amino acids in extreme salinities; and in the brain, decreased glycogen and acetoacetate levels of fish in LSW.

All data in IMIS is subject to the VLIZ privacy policy Top | Authors