Masayoshi TAKEISHI (Ph.D.)
- Recent Publications
- Avifauna of the Omo N. P., Ethiopia, in the dry season. African Study Monographs, 4 (1983) :91-106.
- Range size and activity pattern of three nocturnal carnivores in Ethiopia by radio-telemetry. Journal of Ethology, 1(1983) : 109-111.
- Spatial relationship among individuals of the Japanese lacertid. Ecological Research, 1 (1986) : 37-46.
- Notes on the growth in the Japanese lacertid. Bulletin of the Kitakyushu Museum of Natural History, 6 (1987) : 265-268.
- Foraging and time budget of the wintering hooded cranes in a wintering area in Yashiro, Japan. Proceedings 1987 International Crane Workshop. ed. Harris, J. International Crane Foundation, Baraboo, Winsconsin, (1991) : 305-310.
- Conservation of wintering hooded cranes in Yashiro, Japan. Journal of the Yamashina Institute for Ornithology, 25 (1993) :157-165.
- Nest-site characteristics in the black-billed magpies Pica pica sericea. Japanese journal of Ornithology. 42 (1994) :53-59.
- A study on the ecological factors in the population dynamics and distribution of the black-billed magpie Pica pica sericea in Japan. Bulletin of the Kitakyushu Museum of Natural History. 14 (1995) :55-97.
- Congener-specific analysis of polychlorinaturaled dibenzo-p-dioxins, dibenzofurans, and coplanar polychlorinaturaled biphenyls in frogs and their habitats, Kitakyushu, Japan. Environmental Toxicology and Chemistry, 21 (2002) : 129-137.
- Recent studies
1. The cooperative research on the Saunders’s gull between Japan and China
The Saunders’s gull (Larus saundersi) is designated as a globally threatened species and is ranked in “Vulnerable” on the Red List of IUCN. I have participated with others in research on the Saunders’ gull between Japan and China. We conducted research at Liaoning Shuangtaihekou National Natural Reserve (LSNNR, Panjin City in Liaoning Province) in the breeding season and at western Japan, mainly Kyushu, in the wintering season. We counted the number of adult Saunders’s gulls in flight over the breeding colonies and attaching red leg-flags to chicks and adults for individual identification in LSNNR every June from 1996 to 2002. The numbers of adults counted were 2150 in 1996, 1600 in 1997, 2369 in 1998, 2323 in 1999, 2485 in 2000 and 3211 in 2001, respectively. Inferring the total number of the Saunders’s gull in the world, this means that LSNNR is the most important breeding place for the conservation of the Saunders’s gull species. However, all of breeding area was surrounded by newly constructed banks in 2002. Area planners intend to set up shrimp culture ponds or reed ponds for a paper factory. Thus, salt marshes appropriate as breading grounds for the Saunders’s gull are decreasing in LSNNR, although the population is still more than 3000 birds. The numbers of the Saunders’s gull attached red leg-flags in LSNNR were 110 in 1996, 131 in 1997, 82 in 1998, 184 in 1999, 201 in 2000, 138 in 2001 and 206 in 2002, respectively. Some of them were found at 18 wintering sites in Japan and the migration from LSNNR to Japan was confirmed. Some red flagged gulls were found in Korea and China.
We investigated the Saunders’s gull in 2001 and 2002 in other Nature Reserve, Yalujiangkou National Nature Reserve (Dandong City in Liaoning Province) situated in the border between China and North Korea. We counted 209 and 165 adult gulls in 2001 and 2002, respectively and observed some chicks in the Reserve.
In the wintering season we counted the number of the gulls and searched the leg-flagged gulls at the wintering sites in western Japan. Following the count data by WWF Japan for the Saunders’s gull, which has been started in 1994, the total numbers of the Saunders’s gulls were 1037 in 1994, 1082 in 1995, 1235 in 1996, 1222 in 1997, 1408 in 1998, 1497 in 1999, 1611 in 2000 and 2053 in 2001, respectively. The number of gulls wintering in Japan is gradually increasing but we have lost Isahaya Bay tidal flat, which was the most important wintering sites for the Saunders’s gull, to reclamation. We need to conserve Japan’s tidal flats for the Saunders’s gull and other creatures in future
2. Study of deformed frogs with extra forelimbs in Kitakyushu, Japan
In June 1995, many metamorphosed juvenile frogs with extra forelimbs (photo) were found in a Natural park (Yamada Green Park) in Kitakyushu, Japan. This finding was 2 months earlier than that of Minnesota, USA. The area of Yamada Park had been used as an explosive depot by Japan’s army (1934 to 1945) and the US army (1945 to 1972). The Kitakyushu government formed a “Committee on Deformed Frogs” in June 1996 to investigate causes of the malformation on which I sat. the committee has been Investigating toxic substances in the area as well as searching for genetic explanations.
The malformed frogs found in Yamada were only one species, Yamaakagaeru (meaning: mountain red frog, Rana ornativentris), of ten species living in the park. Other type of malformations, such as missing limbs, extra or missing digits, were limited. Deformed frogs with extra forelimbs had been found only in this park in Kitakyushu. Egg masses of R. ornativentris were collected from Yamada Park and reared in a laboratory until metamorphosis show a large occurrence of the malformation (extra forelimbs) with an egg-mass ranging from 0% to 31.0% with a mean of 1.4%.
In order to examine whether hereditary factors are the cause of extra limbs, crossing tests using extra limbs’ frogs had been carried out. From the results of the tests, the possibility of hereditary factors is very high.