| Project/Area Number |
05041104
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| Research Category |
Grant-in-Aid for international Scientific Research
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| Allocation Type | Single-year Grants |
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| Section | Field Research |
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| Research Institution | Sophia University |
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Principal Investigator |
TAMIYA Toru Sophia University, Associate Prof., 理工学部, 助教授 (30119135)
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| Co-Investigator(Kenkyū-buntansha) |
ZIMMERMAN Keneth University of Newcastle, Lecturer, 理学部, 講師
HEATWOLE Harold North Carolina State Universty, Prof., 理学部, 教授
COGGER Harold Australian Museum, Director, 副館長
HARVEY Alan ストラスクライド大学(スコットランド), 薬学部, 教授
BOULAIN Jean サクレー原子力研究所(仏国), タンパク工学, 主任研究員
MENEZ Andre CEN Saclay, Director, タンパク工学, 部長
TORIBA Michihisa Japan Snake Institute, Researcher, 主任研究員 (40109856)
TAMIYA Nobuo Tohoku University, Honorable Prof., 理学部, 東北大学名誉教授 (90004225)
ENDO Toshiya Nagoya University, Prof., 理学部, 教授 (70152014)
HARRY Alan L. University of Strathclyde, Prof.
BOULAIN Jean-Claude CEN Saclay, Researcher
HEATWOLE Har 米国ノースカロライナ大学, 動物学, 教授
HARVEY Alan. 英国ストラスクライド大学, 薬学部, 教授
HEATWDE Haro ノースカロライナ大学, (米国)・理学部, 教授
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| Project Period (FY) |
1993 – 1995
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| Project Status |
Completed (Fiscal Year 1995)
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| Budget Amount *help |
¥13,000,000 (Direct Cost: ¥13,000,000)
Fiscal Year 1995: ¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 1994: ¥5,000,000 (Direct Cost: ¥5,000,000)
Fiscal Year 1993: ¥5,000,000 (Direct Cost: ¥5,000,000)
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| Keywords | sea snakes / neurotoxin / polymorphism / Laticauda / colubrina / laticaudata / frontalis / semifasciata / semifasciata |
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| Research Abstract |
To identify the new spices of sea snake Laticauda frontalis, field research has been undertaken in Fiji, Tonga, Vanuatu and New Caledonia. The snake L.frontalis is almost identical to Laticauda colubrina. This species is apparently restricted to the islands of Vanuatu except for a specimen collected a century ago on one of New Caledonianls Loyalty Islands.
The project is part of a broader study of variation in venomous sea snakes throughout the Pacific region. The research being undertaken by our group is of two pricipal kinds : studies of the venom of these snakes and broader studies into their taxonomy and ecology.
To data, the Vanuatu species Laticauda frontalis is known only from various sites on Efate and Espritu Santo, and it will be important in future work to attempt to determine the geographic limits of this species, together with the extent of morphological and genetic variation in Vanuatu. Deduced amino acid sequences of neurotoxins from the venom gland cDNAs of L.frontalis are different from that of L.colubrina from various countries except from New Caledonia. Deduced amino acid sequences of L.frontalis are similar to that of New Caledonian L.colubina. Midbody scales of L.colubrina from Fiji and Vanuatu are 23 to 25. However, midbody scales of L.frontalis from Vanuatu and L.colubrina from New Caledonia are 21 to 23.
We concluded that species Laticauda frontalis should add as a new species in genus Laticauda. Laticauda colubrina in New Caledonia should classify as subspecies of Laticauda frontalis.
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