|
KMID : 0894520000040020175
|
|
Development & Reproduction
2000 Volume.4 No. 2 p.175 ~ p.180
|
|
|
Reproductive Cycle of the Melania Snail , Semisulcospira libertina libertina
|
|
장영진
장해진,민병화,방인철
|
|
|
Abstract
|
|
|
|
The reproductive cycle of ovoviviparous melania snail, Semisulcospira libeytina libertina was studied in the valley near Naewon Temple in Yangsan, Korea. Water temperature (WT) of the habitat ranged from 1.3?C to 22.5?C The meat weight rate (MWR) reached the maximum with the beginning of WT increase in March and the minimum in August. Monthly changes in average oocyte diameter showed the maximum (249.6±2.6 {\mu}{\textrm}{m}) in July and the minimum (134.3±2.8 {\mu}{\textrm}{m}) in December S. libertina libertina seemed to be a year-round breeder except for mid-summer and mid-winter. Two main reproductive cycle of the species could be divided into five successive stages: multiplicative (March, October), growing (April and May, November), mature (June and July, December), ovulation (August, January), parturition (September and October, March to May) and resting (September, February) stages in female and multiplicative (March, October), growing (April, November), mature (March to June, December), copulatory (July and August, January), resting (September, February) stages in male.
|
|
|
KEYWORD
|
|
|
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|