| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2017: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Outline of Final Research Achievements |
In this study, the timing of egg releasing by Pacific abalone Haliotis discus hannai was different between shallow area ( 3 - 5 m depth) and deep area (10 m depth). The dispersion distance of eggs and larvae changes through hydrodynamics which spatiotemporally changes. Therefore, it is highly possible that the effect on the population dynamics is different between the individuals inhabiting the shallow area and the individuals inhabiting the deep area.
Since H. discus hannai is an external fertilization species, the distance between individuals and aggregation size could influence the fertilization rate and genetic diversity of fertilized eggs. Our study showed that the encounter rate of male and female increases by following the mucus each other. In addition, the effect of the mucus following on the encounter rates increased with increasing the population density.
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