Sex differentiation, changes in length, weight and eye size before and after metamorphosis of European eel (Anguilla anguilla L) maintained in captivity

• Main Authors: Beullens, K, Eding, EH, Ollevier, Frans, Komen, J, Richter, CJJ
• Format: Article in Journal/Newspaper
• Language: English
• Published: Elsevier science bv 1997
• Subjects: european eel (anguilla anguilla l); sex differentiation; metamorphosis; garonne basin (fr); maturation; Anguilla anguilla
• Online Access: https://lirias.kuleuven.be/handle/123456789/59003; http://gateway.newisiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ScienceDirect&SrcApp=PRODUCT_NAME&KeyAID=S0044848697000197&DestApp=ScienceDirect&SrcAppSID=APP_SID&SrcJTitle=WURS_TITLE

Migrating European eel (Anguilla anguilla L.) glass eels were collected annually in the Garonne Basin (France) during 1987-1989 and subsequently raised under freshwater conditions. In 1990 and 1991 sex differentiation, gonadal development, length/weight and eye size were studied in relation to metamorphosis from yellow to silver eel stage. Differentiation from intersexual gonads to testes took place after 2 years and was synchronized with metamorphosis. Differentiated ovaries, however, were already present in 2(+) yellow eels indicating that expression of female gonadal sex was not synchronized with metamorphosis. status: published