一.Under different stocking temperature, model establishment of regulation ofmaturation and spawning of small abalone will be carried out. Results of this researchmay provide information to the small abalone seed producers to promate the utility of- 7 -*1111028873075* 1111028873075 2005/03/17 11:07:53precious broodstocks and to adjust their seed-producing strategies.二.The mortality of post-larval small abalone occurred in 9-22 days after settlement onthe plastic plates and have resulted in low survival less than 1% since 2001. Thesettlement of abalone larvae in response to diatom films depends on abalone species,diatom species and density of diatom. Traditionally using the natural diatom films couldsomewhat control the quantity, but hardly for the quality. This study aims for isolatingthe suitable diatoms for post-larval small abalone, and research on their identification,collection culture and growth characteristics. Finally, technique for control andmanagement of diatom films on settlement plates could be developed and the mostcritical problems in abalone aquaculture could be resolved.三.The mass mortality of abalone were suffered due to the acute salinity change duringrain fall. The study was conducted to select the breeding stock of abalone being tolerablefor lower salinty.四.Culture of small abalone, Haliotis diversicolor supertexta has expanded quickly dueto development of successful propagation and larviculture. So far, multiple-layer basketsystems became the most common culture method in Taiwan since the land in the islandis limited.In the study, a basket system, which firstly is used in shrimp culture, will be used toculture small abalone. The system has been proven excellent in culture of white-legshrimp and grass shrimp. We have found that the both shrimps cultured in the multiplelayerbasket system have high production and low mortality. The experiment includestwo parts: one and multiple layer basket layers. We will compare the growth and survivalrates of abalone cultured in the system and the common-used basket system.五. To compare ovary mature degree and quality of zygote by feeding four kinds ofdifferent feeds in parent abalone. Establishing raise parent abalone by recycle watersystem method, and breeding ten thousands pieces of parent abalone. To executeartificial reproductions of abalone above 10 times a year and to supply zygote and larvaefor research purpose requirement.