| Budget Amount *help |
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2001: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2000: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1999: ¥1,700,000 (Direct Cost: ¥1,700,000)
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| Research Abstract |
In this study the following contents referred the life history have be conducted for the two halfbeak fish, Hyporhamphus sayori and H. intermedius: distribution in Japan, the differential morphology, observation of developmental stages of egg, relations between water temperature and salinity, and hatched hour of egg and growth of larvae, morphological changes of larvae with the development, food habits, system of migration, daily growth, relation between the age and growth and others. These research and experiments have practiced mainly during field works, but the unable items in the wild were clarified by the experiments in laboratory with the reared fish. During these works the life history of the two halfbeak fish distributed in north waters from Kyushu have elucidated and the method of the preservation for Hyporhamphus intermedius, threatened species in Fukuoka were proposed, that is , the maintenance and the preparation of the WANDO, back water area equipped the biotope in the tidal area of river.
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