Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.1/5407
Título: Expression of pituitary prolactin, growth hormone and somatolactin is modified in response to different stressors (salinity, crowding and food-deprivation) in gilthead sea bream Sparus auratus
Autor: Laiz-Carrión, R.
Fuentes, J.
Redruello, Begoña
Guzmán, José M.
Río, María P. Martín del
Power, Deborah
Mancera, J. M.
Palavras-chave: Food deprivation
GH
Osmoregulation
PRL
SL
Sea bream
Sparus auratus
Stocking density
Data: 2009
Editora: Elsevier
Citação: Raúl Laiz-Carrión, Juan Fuentes, Begoña Redruello, José M. Guzmán, María P. Martín del Río, Deborah Power, Juan M. Mancera, "Expression of pituitary prolactin, growth hormone and somatolactin is modified in response to different stressors (salinity, crowding and food-deprivation) in gilthead sea bream Sparus auratus" in General and Comparative Endocrinology 162 (2009) 293–300.
Resumo: Prolactin (PRL), growth hormone (GH) and somatolactin (SL) expression was studied in gilthead sea bream (Sparus auratus) in response to several different stressors (salinity, food deprivation or stocking density). In the first experiment, specimens were acclimated during 100 days at three different environmental salinities: low salinity water (LSW, 6 ppt), brackish water (BW, 12 ppt) and seawater (SW, 38 ppt). Osmoregulatory parameters corresponded to those previously reported for this species under similar osmotic conditions. Pituitary PRL expression increased with decreasing environmental salinity, and was significantly different between SW- and LSW-acclimated fish. Pituitary GH expression was similar between SW- and BW-acclimated fish but decreased in LSW-acclimated specimens. Pituitary SL expression had a ‘‘U-shaped” relationship to environmental salinity with the lowest expression in BW-acclimated fish. In a second experiment SW-acclimated specimens were randomly assigned to one of four treatments and maintained for 14 days: (1) fed fish under low density (LD, 4 kg m!3); (2) fed fish under high density (HD, 70 kg m!3); (3) food deprived fish under LD; and (4) food deprived fish under HD. Plasma glucose and cortisol levels corresponded to those previously reported in S. auratus under similar experimental conditions. Pituitary PRL and SL expression increased in fish maintained under HD and decreased in food deprived fish. In conclusion, an effect of environmental salinity on pituitary PRL and GH expression has been demonstrated. In addition, crowding stress seems to interact with food deprivation in S. auratus and this is reflected by changes in pituitary PRL, GH and SL expression levels.
Peer review: yes
URI: http://hdl.handle.net/10400.1/5407
DOI: http://dx.doi.org/10.1016/j.ygcen.2009.03.026
Aparece nas colecções:CCM2-Artigos (em revistas ou actas indexadas)



FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpace
Formato BibTex MendeleyEndnote Degois 

Todos os registos no repositório estão protegidos por leis de copyright, com todos os direitos reservados.