Germ cell differentiation and sexual maturation of the hanging cultured female scallop Patinopecten yessoensis on the east coast of Korea.

From: Journal of Shellfish Research | Date: December 1, 2005| Author: | Copyright information

ABSTRACT Gonadosomatic index, germ cell differentiation, ovarian cycle and first sexual maturity in female Patinopecten yessoensis were studied by histologic and cytologic observations. In the early vitellogenic oocyte, the Golgi complex, mitochondria and endoplasmic reticulum were involved in the formation of lipid droplets. In the late vitellogenic oocyte, exogenous substances, namely, glycogen particles and lipid granular substances appeared in the germinal epithelium passed into the ooplasm through the microvilli of the vitelline envelope. Yolk granules and multivesicular ...

Read all of this article with a FREE trial to HighBeam Research

Related newspaper, magazine, and trade journal articles from HighBeam Research

(Including press releases, facts, information, and biographies)

Early sexual maturity and obesity. (Fitness).(medical research)(Brief Article)
; ...previous studies have suggested that sexual maturity is associated with obesity in females...finding of a reverse association between sexual maturity and obesity in boys sheds new light...additional evidence for the influence of sexual maturity on fatness. Wang says that the gender...
Early sexual maturity and obesity
; ...previous studies have suggested that sexual maturity is associated with obesity in females...finding of a reverse association between sexual maturity and obesity in boys sheds new light...additional evidence for the influence of sexual maturity on fatness. Wang says that the gender...
Problems of Early Sexual Maturity Cited by Doctor
; ...number of children with signs of early sexual maturity. Dr. Shi said one of the effects of...centimeters (5 feet), he said. This early sexual maturity also can impair children's psychological...particularly when children's intelligence and sexual maturity levels are incompatible. ...
The naked pate
; Baldness (Letters, May 27) is a sign of sexual maturity in apes. Mary Curry Finchingfield, Essex
Oogenesis and sexual maturation in Meretrix lusoria (Roding 1798) (Bivalvia: Veneridae) in western Korea.
; ...reproductive cycle, and the size at sexual maturity in female Meretrix lusoria were investigated...in shell length that were at first sexual maturity was over 56.3%, and for clams over...it was 100%. Shell length at 50% of sexual maturity (rate of sexual maturity, ...
Research: Tyrannosaurs faced midlife crisis; Dinosaurs that survived to age 2 usually lived until their teen years
; ...little mortality until they reached sexual maturity in their teens, researchers report...some 70 percent survived to reach sexual maturity between 13 and 16, when mortality...said Erickson. "As they came into sexual maturity there was a good chance they started...
Sweet 13.(high-calorie diet stimulates gonadotropin-releasing hormone, hastens onset of puberty)(Brief Article)
; ...propelling girls and boys into sexual maturity sooner. Researchers have known...roles in determining the onset of sexual maturity; Foster and his colleagues are...diet will determine the time of sexual maturity.
Did T-rexes have a midlife crisis?
; ...little mortality until they reached sexual maturity in their teens, researchers report...some 70 percent survived to reach sexual maturity between 13 and 16, when mortality...said Erickson. "As they came into sexual maturity, there was a good chance they started...
Relative pleopod length as an indicator of size at sexual maturity in slipper (Scyllarides squammosus) and spiny Hawaiian (Panulirus marginatus) lobsters.
; ...ovigerous condition) of functional sexual maturity. Relative exopodite length ( pleopod...matched (same-year) characterizations of sexual maturity based on ovigerous condition--a more...conventional morphological measures of sexual maturity. Morphometric proportions also should...
Ballet does not stunt the growth of small dancers
; ...rigorous exercise affects a young ballerina's growth or delays sexual maturity. Professor Nicola Maffulli, of Keele University, said studies...spurt. "Male gymnasts tend to have shorter stature and reach sexual maturity later than their non-athletic peers but no-one blames intensive...