Kenichi Ohara

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Two types of infection with myxosporean parasites, which were different in cyst size, were found from the gill of Rhinogobius sp. OR collected from the Nagara River, Gifu Prefecture, Japan. A myxosporean forming large-type cysts in the gill filament was morphologically identified as Henneguya rhinogobii. Another myxosporean forming small-type cysts was(More)
A new myxosporean parasite was found in the body cavity and caudal peduncle of the freshwater goby Rhinogobius sp. Orange type (OR) collected from the Nagara River. Gifu Prefecture, Japan. Infected fish exhibited substantial swelling of the abdomen caused by large parasitic cysts approximately 10 mm in size, formed in the visceral cavity. The cyst was a(More)
The freshwater goby Rhinogobius is the most abundant fish in the shore area of Lake Biwa, Japan. Recently, it has been reported that two morphs of Rhinogobius inhabit this lake. In this study, genetic variations in Rhinogobius sp. OR (Orange-type) and Rhinogobius sp. BW (Biwa-type) in the Lake Biwa water system have been investigated using polymerase chain(More)
The genetic diversity and relationship among four morphotypes of Rhinogobius sp. OR, Gobiidae (“Tōshoku,” “Shinjiko,” “Gi-tōshoku,” and “Shimahire”) were investigated with seven microsatellite DNA loci, and amphidromy of these morphotypes was verified by strontium (Sr) and calcium (Ca) deposition in the otolith. Samples of “Tōshoku,” “Shinjiko,”(More)
The Japanese silver crucian carp, Carassius langsdorfii, is a naturally polyploid fish that reproduces by gynogenesis, resulting in a geographically clustered clonal population. To determine the amount of clonal diversity in this species, we used genetic markers to compare fish from several Japanese locations. Samples were collected from Lake Kasumigaura(More)
Twelve populations of Girella punctata, from widespread locations of the species’ range in Japan and Korea, were screened for sequence variability within the mitochondrial DNA (mtDNA) control region (n = 128) and at five polymorphic microsatellite loci (n = 547) to determine the genetic structure maintaining population integrity. mtDNA variability of 132(More)
In this paper, the ubiquitous mobile manipulator system, which could realize the concept of ubiquitous robotics, is proposed. The ubiquitous robot might be able to give several services in human environments, beside classical robots have many problems to realize services, because of the complexity of environments and the amount of information. The(More)