TY  - JOUR 
T1  - Plasma testosterone and 11-ketotestosterone levels of male pacu Piaractus mesopotamicus (Cypriniformes, Characidae)
JO  - Brazilian Journal of Medical and Biological Research
A1  - Gazola, R.
A1  - Borella, M.I.
SN  - 0100-879X
UL  - 10.1590/S0100-879X1997001200017
VL  - 30 
Y1  - 1997
PB  - Brasil 
ER  -