Influence of temperature regime on endocrine parameters and vitellogenesis during experimental maturation of European eel (Anguilla anguilla) females

• Published in: General and Comparative Endocrinology
• Main Authors: Perez, L., Penaranda, D.S., Dufour, S., Baloche, S., Palstra, A.P., Thillart, G.E.E.J.M., Asturiano, J.F.
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2011
• Subjects: artificial maturation; conger conger-myriaster; glycoprotein hormone alpha; goldfish carassius-auratus; ii-beta subunits; induced sexual-maturation; japanese eel; luteinizing-hormone; messenger-rna levels; trout oncorhynchus-mykiss; Anguilla anguilla
• Online Access: https://research.wur.nl/en/publications/influence-of-temperature-regime-on-endocrine-parameters-and-vitel; https://doi.org/10.1016/j.ygcen.2011.08.009

We examined the effect of temperature in European silver eels during their maturation induced by injections of carp pituitary extract on endocrine parameters: pituitary fshß and lhß expression, plasma 17ß-estradiol (E2) and vitellogenin, estrogen receptor 1 (esr1), and vitellogenin 2 (vtg2) expression in liver. A variable thermal regime (T10) that increased from 10° to 14° and 17°C was compared with a constant 20°C regime (T20) during 12weeks. T10 caused a faster development until week 8, higher fshß, lhß, esr1 expression, and higher E2 levels. The results strongly suggest that T10 is inducing a higher endogenous FSH level which increases the E2 circulating level during vitellogenesis. A variable thermal regime induced an fshß expression and E2 profile in vitellogenic hormonally matured eel females that were more similar to the profile observed in other naturally maturing fish