TY - JOUR
T1 - Organizational-activational concept revisited
T2 - Sexual differentiation in an atherinomorph teleost
AU - Rosa-Molinar, E.
AU - Fritzsch, B.
AU - Hendricks, S. E.
PY - 1996/12
Y1 - 1996/12
N2 - Because of its numerous sexually dimorphic characters, the Western mosquitofish Gambusia affinis affinis is an excellent vertebrate system for addressing questions concerning sexual differentiation. In this review, the actions and limits of gonadal sex steroids, specifically testosterone, on the development of the sexually dimorphic anal fin and its axial and appendicular support are described. Data from our laboratory show that the critical period in this species for the anterior transposition of the male anal fin and its appendicular support occurs during the late embryonic period and that this differentiation of the male phenotypic genital area during the critical period is regulated by androgen.
AB - Because of its numerous sexually dimorphic characters, the Western mosquitofish Gambusia affinis affinis is an excellent vertebrate system for addressing questions concerning sexual differentiation. In this review, the actions and limits of gonadal sex steroids, specifically testosterone, on the development of the sexually dimorphic anal fin and its axial and appendicular support are described. Data from our laboratory show that the critical period in this species for the anterior transposition of the male anal fin and its appendicular support occurs during the late embryonic period and that this differentiation of the male phenotypic genital area during the critical period is regulated by androgen.
UR - http://www.scopus.com/inward/record.url?scp=0030424075&partnerID=8YFLogxK
U2 - 10.1006/hbeh.1996.0059
DO - 10.1006/hbeh.1996.0059
M3 - Article
C2 - 9047280
AN - SCOPUS:0030424075
SN - 0018-506X
VL - 30
SP - 563
EP - 575
JO - Hormones and Behavior
JF - Hormones and Behavior
IS - 4
ER -