Spawning of the Thai river sprat in Pasak
Jolasid reservoir occurred throughout of the year
but was high in early rainy season and low in cold
season and irregularly in anywhere of the reservoir.
Low water temperature and current affected
spawning and larval drift to suitable habitat.
Development of myomere in the yolk-sac larvae
was not complete while the digestive gut moved
form posterior into mid-portion of body in
juvenile.