AccessMyLibrary provides FREE access to over 30 million articles from top publications available through your library.
Create a link to this page
Copy and paste this link tag into your Web page or blog:
According to recent research from Nagpur, India, "This study reports annual cyclic changes in the plasma levels of sex hormone binding globulin (SHBG), sex steroids (E-2, estradiol; T, testosterone; P, progesterone) and protein (PRT) in correlation with reproductive phases in both sexes of an Indian major carp, Labeo rohita. Plasma SHBG, E-2, T and PRT levels in females and SHBG and T levels in males showed steady increases (p
"During the late spawning and early postspawning phases, E-2, T and SHBG levels revealed an abrupt and significant descent coincident with the GSI in both the sexes. The plasma P levels in females, attaining measurable quantities only in prespawning phase, underwent a rapid increase followed by a quick decline to undetectable levels in the spawning phase. This occurrence of P for a short duration suggests a limited role in ovarian function. During the resting phase, the E-2. T and SHBG levels in both sexes declined to minimum in conjunction with a decrease in the GSI while PRT showed an increase These,. data suggest that a significant increase in SHBG (p
The researchers concluded: "The significant increase of PRT in females during early spawning reflects its role in oocyte function, while PRT and E-2 in males may not significantly affect the testicular activity."
...