gonad and plasma samples were taken from blue cod captured throughout the reproductive cycle , gonad condition was assessed , and plasma levels of 17alpha-hydroxyprogesterone ( 17alphaohp ) , 17alpha,20beta-dihydroxy-4-pregnen-3-one ( 17alpha,20betap ) , testosterone ( t ) , 17beta-estradiol ( e2 ) and estrone ( e1 ) were measured by radioimmunoassay .
C0018067
gonad
C0018050
gonad condition