2007 Fiscal Year Final Research Report Summary
Basic researches on the newly described species Omura's whale (Balaenoptera omurai) in East Asia.
| Project/Area Number |
17405017
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 海外学術 |
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| Research Field |
Biodiversity/Systematics
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| Research Institution | National Museum of Nature and Science, Tokyo |
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Principal Investigator |
YAMADA Tadasu National Museum of Nature and Science, Tokyo, National Museum of Nature Science, Department of Zoology, Head (70125681)
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| Co-Investigator(Kenkyū-buntansha) |
WADA Shiro National Research Insutitute of Fisheries Science, Stock Assesment Division, Senior Researcher (50371828)
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| Project Period (FY) |
2005 – 2007
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| Keywords | Balaenoptera omurai / Balaenoptera edeni / Balaenoptera brydei / morphology / molecular biology / genus Balaenoptera / biogeography |
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| Research Abstract |
Ninty three specimens of middle sized balaenopterid preserved in 54 institutions in Taiwan, Thailand, China and Korea were investigated. As a result of morphological researches we confirmed thirty eight Omura's whales (Balaenoptera omurai), thirty five Eden's whales (Balaenoptera edeni) and one Bryde's whale (Balaenoptera brydei). Species identification by molecular biological analyses were twenty four, twenty three and one individuals respectively. Detailed researches on the misleading two species B. edeni and B. brydei turned out to be indispensable and additional investigations on the hilotype specimen of B. edeni in the Indian Museum, Calcutta and specimens collected from the type locality of B. brydei, for which no type specimen was designated, were made. Further existence of individuals which share fundamental characters with basically B. edeni-B. brudei complex but possess significantly difierent parietal bone was found in the Philippines, Indonesia and South Africa. For Omura's whale, we confirmed the distribution range between 40 degree north and 40 degree south and 90 and 140 degree east. In the Gulf of Thailand, B. omurai were found only from south of 8 degree North, whereas B. edeni fonly rom the area north of 8 degree north.
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Research Products
(14 results)
