Changes of gonadotropin-releasing hormone receptor 2 during the anadromous spawning migration in Coilia nasus.

ABSTRACT:

Background

An increase in the activity of the pituitary-gonad axis (PG-axis) and gonad development are essential for the onset of spawning migration in teleosts. In the fish Coilia nasus, gonad development and spawning migration up the Yangtze River occurs by the end of each summer. We hypothesized that gonadotropin releasing hormones receptor 2 (GnRH-R2), which together produce a signal that interacts with the PG-axis, may help to regulate spawning migration processes.

Results

In this regard, we (1) characterized the gonadosomatic index (GSI) in the anadromous fish C. nasus; (2) analyzed the GnRH-R2 mRNA expression levels in ovary and brain, and concentrations in the serum; and (3) identified the GnRH-R2 protein distribution in the brain and ovaries. We found strong relatio

SUBMITTER: Duan JR 

PROVIDER: S-EPMC5122156 | biostudies-literature | 2016 Nov

REPOSITORIES: biostudies-literature