The swimming crab Portunus trituberculatus is a commercially important crab species in East Asia countries. Gonadal development is a physiological process of great significance to the reproduction as well as commercial seed production for P. trituberculatus. However, little is currently known about the molecular mechanisms governing the developmental processes of gonads in this species. To open...

the sexual maturation and spawning period of blood cockle in matang mangrove estuary was studied by naked eye and histological observations of the gonads from july 2010 to april 2011. the high spawning period was from november to february. however, at one station where bottom sediment exhibited a severe reduction in potential of −100 mv lower, immature individuals were common. these results sug...

The nematode Caenorhabditis elegans is an important model for studies of germ cell biology, including the meiotic cell cycle, gamete specification as sperm or oocyte, and gamete development. Fundamental to those studies is a genome-level knowledge of the germline transcriptome. Here, we use RNA-Seq to identify genes expressed in isolated XX gonads, which are approximately 95% germline and 5% so...

Gonadal homogenates of rainbow trout from D(ay) 60, D100 and D200 after fertilization have been incubated in vitro in the presence of dehydroepiandrosterone-3H to demonstrate 3 beta-hydroxysteroid dehydrogenase (3 beta-HSD) and delta 5,4-isomerase activity, of pregnenolone-3H to assess the synthesis of "progestins" and of androstenedione-3H to determine oestrogen synthesis in the ovaries and th...

Birds have a ZZ/ZW sex chromosome system, but the mechanism of sex determination remains unknown. The heterogametic sex is female (ZW) and one hypothesis holds that the W chromosome carries a dominant-acting ovary-determining gene. The strongest candidate ovary-determinant on the W chromosome is HINTW, which encodes an aberrant nucleotide hydrolase enzyme. HINTW is conserved amongst all carinat...

We performed a retrospective study of pelvic radiographs of children between August 2003 and January 2004 to determine whether gonadal shields effectively protected the gonads during pelvic radiographs in pediatric patients. We considered 1,047 radiographs of 111 children under the age of 16 years who were examined by the orthopaedic department at the University Hospital of North Staffordshire....