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Dive into the research topics where Yoshimaro Yamashina is active.

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Featured researches published by Yoshimaro Yamashina.


Caryologia | 1956

Karyotype Studies in Birds. 2: A Comparative Study of Chromosomes in the Columbidae

Sajiro Makino; Tatsuo Udagawa; Yoshimaro Yamashina

RIASSUNTOGli Aa. descrivono il cariotipo di Zenaidura macroura marginella e lo comparano criticamente con quello di altre cinque specie di Columbidae (Columba, Streptopelia, e Sphenurus). La somiglianza cariologica indica una forte affinita nelle relazioni tassonomiche di questi generi.


Journal of The Yamashina Institute for Ornithology | 1952

Chromosomes of Arenaria interpres interpres(L.)

Yoshimaro Yamashina; Tatsuo Udagawa

The diploid number of chromosomes was determined as 80 (_??_2n) in the spermatogonial divisions. The macro-chromosomes include four pairs, being 8 in number. They have a formula consisting of aR+bv+cr+dr. The micro-chromosomes vary in size from small rods to spherulus and are 72 in number.There are found with indisputable clearness 40 bivalents in the primary spermatocyte metaphase plate. Two larger bivalents, probably descendants from the aR and bv elements of the diploid group, are remarkable for their conspicuous configuration.The karyotype as found in this species is quite unique in birds so far studied. In the related species, Charadrius dubius studied by Yamashina (1946), the following choromosome formula was given:Charadrius dubius 2Js+2Vs+2Rs+4vs+68rs _??_2n=78In comparison with the chromosomes of Arenalia interpres, there is no approach or similarity between the two species. Cyto-taxonomical consideration will be retained until further data can be accumulated.


Journal of The Yamashina Institute for Ornithology | 1952

Cygnus olor (Gmelin) obtained in Hachijo I., the Seven Islands of Izu

Yoshimaro Yamashina

Mr. G. Okuyama in November, 1933 procured a swan on Hachijo Island, one of the Seven Islands of Izu and, it was identified by Mr. Tokutaro Momiyama (1939) as Cygnus cygnus (specimen no. 340033).I have recently exmined this specimen and found out that it is Cygnus olor, not C. cygnus as formerly considered it to be. This fact constitutes the first record of the Mute Swan found in the Japanese Islands.


Journal of The Yamashina Institute for Ornithology | 1981

A New Species of Rail from Okinawa Island

Yoshimaro Yamashina; Toru Mano


Journal of The Yamashina Institute for Ornithology | 1978

Current Status of Grus japonensis, G. vipio and G. monacha in the Asian Continent

Yoshimaro Yamashina


Journal of The Yamashina Institute for Ornithology | 1973

List of recently received ornithological literature of USSR

Yoshimaro Yamashina; Shiro Matsuyama


Journal of The Yamashina Institute for Ornithology | 1970

Birds collected by Kyoto University West Irian Scientific Expedition, 1963-64, in the central highlands of West New Guinea

Yoshimaro Yamashina


Journal of The Yamashina Institute for Ornithology | 1962

On the new scheme of bird-banding in Japan

Yoshimaro Yamashina


Journal of The Yamashina Institute for Ornithology | 1954

Phenotypical Differentiation of Endemic Birds in Relation to Island Size in Micronesia

Yoshimaro Yamashina


Journal of The Yamashina Institute for Ornithology | 1977

The present status of Japanese Crested Ibis Nipponia nippon and Japanese White Stork Ciconia ciconia boyciana in Continental Asia

Yoshimaro Yamashina

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Nagahisa Kuroda

Yamashina Institute for Ornithology

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Shiro Matsuyama

Yamashina Institute for Ornithology

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Toru Mano

Yamashina Institute for Ornithology

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