Sexual reproduction and genetic variation of the scleractinian coral Mycedium elephantotus at Maoao (MO), Yenliao Bay, northern Taiwan, and at Tiaoshi (TS), Nanwan Bay, southern Taiwan, were studied from 1990 to 1996. M. elephantotus is a hermaphroditic broadcast spawner with an annual reproductive cycle. Gametogenesis of the MO population began in January, and spawning occurred in July-August....

this survey was aimed at detecting histological and histometrical changes of common carp ovaries in khouzestan province climate conditions. the goal was to determine the ovarian status in the breeding period of the reproductive cycle. ovaries of 49 common carp brooders were collected from april to october, 2010. the samples were taken from the anterior, median and posterior portions. 5-6µ secti...

THE IDEA that by activating the hypothalamic-pituitary-adrenal (HPA) axis, stress and overt or latent psychological disturbances have the potential of inhibiting the hypothalamic-pituitary-gonadal (HPG) axis has been circulated for a long time (1). It is generally thought that, if severe enough, this condition may lead to the suppression of the normal menstrual cycle in a syndrome referred to a...

Estrogen is associated with female sexual behaviors, particularly receptive behaviors during the reproductive cycle. Less is known about the relationship between estrogen and female preference behaviors that may precede receptivity and copulation. Separating the mechanisms underlying preference from receptivity is often confounded by the tightly coupled cycle- or estrogen-dependent expression o...