Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Takeji Kimura"'
Publikováno v:
Fisheries Science. 87:93-104
Estrogenic endocrine-disrupting chemicals are an increasing social concern, as they can reduce the reproductive activity of wildlife. The present study aimed to clarify the long-term effects of estradiol-17β (E2) on male reproductive activity in gol
Publikováno v:
European Journal of Neuroscience. 23:2447-2457
We investigated the participation of protein kinase C (PKC) in the regulation of vocal plasticity in songbirds. Deafening of adult Bengalese finches causes initial song alteration, followed by stabilization. In parallel, the expression of PKC beta1 i
Autor:
Takenori Miyamoto, Hiroko Eda-Fujiwara, Takeji Kimura, Yoshinori Kojima, Yukihiro Takahashi, Heizo Sugita, Hiroko Ogawa, Ai Yamamoto, Ryoko Sakashita
Publikováno v:
Zoological Science. 21:817-821
Identification of the sex of birds is important for captive breeding of endangered species. In the oriental white stork (Ciconia boyciana), an endangered species, both sexes produce an acoustic signal called "clatter" by rattling their mandibles toge
Publikováno v:
Journal of Ethology. 21:23-28
We investigated the effects of estradiol-treated females on the behavior of male budgerigars. In comparison to control females, females given implants of estradiol showed elevated nest behavior and darker cere color, which are characteristics of bree
Publikováno v:
European Journal of Neuroscience. 17:149-154
Females of several songbird species have been shown to respond preferentially to a more complex song. The male budgerigar (Melopsittacus undulatus) sings complex songs consisting of discrete components, known as syllables. We exposed female budgeriga
Publikováno v:
Journal of the Yamashina Institute for Ornithology. 34:9-15
We examined the functional significance of learned acoustic structure in Budgerigars, a species of Psittaciformes in which vocal learning is common. We compared the acoustic structure of normal song to the song of males deafened early in life. The 'd
Autor:
Takeji Kimura, Fumio Matsumoto
Publikováno v:
Journal of Ethology. 13:23-30
Effects of the experience of copulation and cohabitation with a pregnant female on male parental behavior were examined in ICR-strain male mice. The experience of copulation and/or cohabitation with a pregnant female promoted parental behavior, altho
Autor:
Mao Tanabe, Takeji Kimura
Publikováno v:
Journal of Ethology. 13:63-68
The level of aggressiveness and the weight of preputial gland and testis in male mice (Mus musculus) were influenced by housing condition, especially by the presence of cohabitant males. In this study, the relation between aggressiveness and the prep
Autor:
Takeji Kimura
Publikováno v:
Journal of Reproduction and Development. 41:j121-j125
Ethological studies of vertebrates in Japan has been started by scientists of physiological background, and their interest was mainly focussed on proximal causes rather than ultimate ones of animal behavior. Thus bias is being improved towards more b
Autor:
Takeji Kimura, Ryoei Otsu
Publikováno v:
Journal of Ethology. 11:37-42
The effects of food availability and ambient temperature (Ta) on hibernation in the Japanese dormouse,Glirulus japonicus, were examined. When the dormice were deprived of food under natural environmental conditions in midwinter, they showed typical h