European eel is a catadromous fish species, which means that after living in freshwater premature individuals adapt to sea water, and migrate to the Sargasso Sea for spawning. Although male eel can be sexually matured even in freshwater, to date, it was believed that female eel can be matured only in seawater. Here we show that the process of sexual maturation may be induced in freshwater by treating female eels with carp pituitary (GSI = 9.87±1.55%). It is thus proposed that seawater condition is not an obligatory environment for stimulating gametogenesis and for artificial maturation of the European eel in neither gender.
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Feunteun, E. (2002) Management and restoration of European eel population (Anguilla anguilla): An impossible bargain. Ecol. Eng. 18, 575–591.
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Müller, T., Baska, F., Váradi, B., Horn, P., Bercsényi, M. (2005) Testis histology in artificially maturated European eel (Anguilla anguilla L.) at the end of sexual maturation and spermatozoa ultrastructure in freshwater rearing. Acta Biol. Hung. 56, 169–172.
Bercsényi M. , 'Testis histology in artificially maturated European eel (Anguilla anguilla L.) at the end of sexual maturation and spermatozoa ultrastructure in freshwater rearing ' (2005 ) 56 Acta Biol. Hung. : 169 -172 .
Palstra, A., Van Ginneken, V., Van den Thillart, G. (2009) Effects of swimming on silvering and maturation of the European eel, Anguilla anguilla L. In: Van den Thillart, G., Dufour, S., Rankin, C. (eds) Spawning migration of the European eel. Springer Sci+Bussiness Media B, New York Inc., pp. 229–253.