TY - JOUR
T1 - Serum levels of 11-oxotestosterone in male and 17β-estradiol in female rainbow trout (Salmo gairdneri) during the first reproductive cycle
AU - Schulz, Rüdiger
N1 - Funding Information:
I thank R. Oberstebrink-Scholl, who provided expert technical assistance. This study was supported in part by DFG Grants Bl 62/14-l and 2.
PY - 1984/10
Y1 - 1984/10
N2 - From September 1980 to August 1981 the serum levels of 11-oxotestosterone (11-O-T) in 231 male and of 17β-estradiol (E2) in 207 female rainbow trout were measured radioimmunologically, and compared with the developmental stages of the gonads. Using histological criteria, testicular development was divided into seven stages, and ovarian development into four stages. In males, 11-O-T levels remained below 6 ng/ml until the appearance of spermatozoa. Maximum values (126 ng/ml) were observed in spermiating males. In females, E2 levels were below 2 ng/ml during the period of slow oocyte growth. Maximum values (average of 31 ng/ml) were observed during exogenous vitellogenesis.
AB - From September 1980 to August 1981 the serum levels of 11-oxotestosterone (11-O-T) in 231 male and of 17β-estradiol (E2) in 207 female rainbow trout were measured radioimmunologically, and compared with the developmental stages of the gonads. Using histological criteria, testicular development was divided into seven stages, and ovarian development into four stages. In males, 11-O-T levels remained below 6 ng/ml until the appearance of spermatozoa. Maximum values (126 ng/ml) were observed in spermiating males. In females, E2 levels were below 2 ng/ml during the period of slow oocyte growth. Maximum values (average of 31 ng/ml) were observed during exogenous vitellogenesis.
UR - http://www.scopus.com/inward/record.url?scp=0021168524&partnerID=8YFLogxK
U2 - 10.1016/0016-6480(84)90067-4
DO - 10.1016/0016-6480(84)90067-4
M3 - Article
C2 - 6489735
AN - SCOPUS:0021168524
SN - 0016-6480
VL - 56
SP - 111
EP - 120
JO - General and Comparative Endocrinology
JF - General and Comparative Endocrinology
IS - 1
ER -