Study of the effects of thermal regime and alternative hormonal treatments on the reproductive performance of European eel males (Anguilla anguilla) during induced sexual maturation

• Published in: Aquaculture
• Main Authors: Gallego Albiach, Victor, Mazzeo, Ilaria, Vilchez Olivencia, Maria Carmen, Peñaranda, D.S., Carneiro, P. C. F., Pérez Igualada, Luz María, Asturiano Nemesio, Juan Francisco
• Other Authors: Universitat Politècnica de València. Departamento de Ciencia Animal - Departament de Ciència Animal, Universitat Politècnica de València. Instituto de Ciencia y Tecnología Animal - Institut de Ciència i Tecnologia Animal, European Commission, Ministerio de Ciencia e Innovación, Generalitat Valenciana, Universitat Politècnica de València
• Format: Article in Journal/Newspaper
• Language: English
• Published: Elsevier 2012
• Subjects: socio; envir; Anguilla anguilla; European eel
• Online Access: https://doi.org/10.1016/j.aquaculture.2012.04.041; http://hdl.handle.net/10251/64678

S [EN] Since 1960, the European eel (Anguilla anguilla) has suffered a dramatic reduction in natural stocks. Breeding in captivity is considered an alternative, but obtaining high quality sperm seems basic on this regard. The main objective of this study was to assess the effects of three thermal regimes (two of them variable: T10 and T15; and one of them constant: T20) and three hormonal treatments with different hormones (hCG, hCGrec and PSMG) on the induction of maturation in European eel males. In the case of the thermal regimes, our results demonstrated that the onset and progression of spermiation are strongly influenced, and perhaps closely regulated, by water temperature. T20 demonstrated the best results in all the sperm parameters (volume, density, motility, kinetic features, etc.) throughout most weeks of treatment, becoming a reliable and productive method for inducing spermiation in this species. In the case of hormonal treatments, the onset and progression of spermiation in European eel males were influenced by the hormone used. In this respect, hCGrec produced the best results in all the sperm parameters including volume, density, motility, kinetic features, etc., throughout most weeks of treatment, thus becoming an effective alternative treatment to the standard hCG treatment used to induce spermiation in eel species. Moreover, hCGrec gave rise to the best economical profitability, making it possible to obtain good quality sperm samples at a lower price than by using the other two hormonal treatments. © 2012 Elsevier B.V. All rights reserved Guardar / Salir Siguiente > Funded by the European Community's 7th Framework Programme under the Theme 2 "Food, Agriculture and Fisheries, and Biotechnology", grant agreement no. 245257 (PRO-EEL) and Generalitat Valenciana (ACOMP/2012/086). Victor Gallego, Ilaria Mazzeo and M. Carmen Vilchez have predoctoral grants from the Spanish Ministry of Science and Innovation (MICINN), Generalitat Valenciana, and UPV PAID Programme (2011-S2-02-6521), respectively. ...