Analysis of growth and migration history in terms of migratory dimorphism in Japanese anchovy
Project/Area Number |
20580195
|
Research Category |
Grant-in-Aid for Scientific Research (C)
|
Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
General fisheries
|
Research Institution | The University of Tokyo |
Principal Investigator |
AOKI Ichro The University of Tokyo, 大学院・農学生命科学研究科, 教授 (40114350)
|
Project Period (FY) |
2008 – 2010
|
Project Status |
Completed (Fiscal Year 2010)
|
Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2010: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2009: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2008: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
|
Keywords | 水産資源 / 系群 / 耳石 / 日周輪 / 微量元素 / 誘導結合プラズマ分析 / 水産学 / 海洋生態 |
Research Abstract |
Rearing experiments on anchovy revealed that micro-increments in otolith were formed daily above 15℃ of water temperature but disappeared below 12℃, and that they were also affected by food conditions. The chemical composition of 6-8 kinds of trace elements including Mn and Sr in otolith discriminated sampling areas at 60-100% of accuracy. Errors occurred between neighboring areas. It was suggested that anchovy are distributed and grow with spatially aggregated but weak coherence from early life stage.
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Report
(4 results)
Research Products
(15 results)