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1.
Haruyuki HIRATA Temidayo OMOBOWALE Olufunke ADEBAYO Nodoka ASANUMA Asako HARAGUCHI Yoshiki MURAKAMI Kodai KUSAKISAKO Keiko IKEDA Mitsuhiko ASAKAWA Kazuyuki SUZUKI Chiaki ISHIHARA Hiromi IKADAI 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2022,84(3):338
The present study examined the presence of Babesia parasites in 104 domestic dogs in Nigeria. Sequentially, Babesia parasites infecting domestic dogs underwent genetic and phylogenetic analyses. The results of nested PCR based on the Piroplasmida 18S rRNA gene illustrated that 13.5% (14/104) of the samples were positive. The obtained positive samples determined the nucleotide sequences of the 18S rRNA genes. In the genetic and phylogenetic analyses, four of five nucleotide sequences were similar to Babesia canis rossi, and one sample exhibited a close similarity to a Babesia sp. isolated from a raccoon in Hokkaido, Japan. The present study revealed the widespread presence of B. canis rossi among domestic dogs in Nigeria. 相似文献
2.
Effects of mangrove deforestation on fish assemblage at Pak Phanang Bay,southern Thailand 总被引:2,自引:0,他引:2
Tatsuya Shinnaka Mitsuhiko Sano Kou Ikejima Prasert Tongnunui Masahiro Horinouchi Hisashi Kurokura 《Fisheries Science》2007,73(4):862-870
Daytime sampling using a seine net was conducted at Pak Phanang Bay (Nakhon Si Thammarat Province, Thailand) in February and
July 2006, to determine differences in fish assemblage structures between a mangrove site and an adjacent site completely
cleared of mangroves. The overall numbers of fish species and individuals were significantly higher at the mangrove site than
the cleared site in both months. Although benthic crustacean feeders showed more species and individual numbers at the mangrove
site in both months, the opposite was found for zooplankton feeders. A cluster analysis, based on the abundance of each species,
demonstrated that the fish assemblage structures were distinctly different between the two sites. In addition, significant
differences in length frequency distributions for each of the four most abundant species were found between the sites in February
and/or July. Small individuals of Scatophagus argus, Ambassis nalua, and Tetraodon nigroviridis were more common at the mangrove site, and of Chelon subviridis at the cleared site. These results suggest that mangrove deforestation exerts marked effects on fish assemblages. 相似文献
3.
Kartika DEWI Hideo HASEGAWA Yuli Sulistya FITRIANA Mitsuhiko ASAKAWA 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2015,77(10):1217-1222
The present report describes Syphacia
(Syphacia) maxomyos sp. n. (Nematoda:
Oxyuridae) from two species of spiny rats, Maxomys musschenbroekii from
Sulawesi and M. whiteheadi from Sumatra. It is characterized by a
cephalic plate extending laterally with dorsoventral constriction and stumpy eggs with an
operculum rim reaching pole. It is readily distinguishable by the former feature from all
of hitherto known representatives of this genus in Indonesia, but it resembles parasites
in Murini and Hydromyni rodents in continental Asia and Sahul. This is the first
Syphacia species distributed in both the Sunda Shelf and Sulawesi with
the exception of Syphacia muris, a cosmopolitan pinworm found in rodents
of the of genus Rattus. It is surmised that S. maxomyos
is specific to Maxomys and that it was introduced to Sulawesi by
dispersal of some Maxomys from the Sunda Shelf. 相似文献
4.
Rensing SA Lang D Zimmer AD Terry A Salamov A Shapiro H Nishiyama T Perroud PF Lindquist EA Kamisugi Y Tanahashi T Sakakibara K Fujita T Oishi K Shin-I T Kuroki Y Toyoda A Suzuki Y Hashimoto S Yamaguchi K Sugano S Kohara Y Fujiyama A Anterola A Aoki S Ashton N Barbazuk WB Barker E Bennetzen JL Blankenship R Cho SH Dutcher SK Estelle M Fawcett JA Gundlach H Hanada K Heyl A Hicks KA Hughes J Lohr M Mayer K Melkozernov A Murata T Nelson DR Pils B Prigge M Reiss B Renner T Rombauts S Rushton PJ 《Science (New York, N.Y.)》2008,319(5859):64-69
We report the draft genome sequence of the model moss Physcomitrella patens and compare its features with those of flowering plants, from which it is separated by more than 400 million years, and unicellular aquatic algae. This comparison reveals genomic changes concomitant with the evolutionary movement to land, including a general increase in gene family complexity; loss of genes associated with aquatic environments (e.g., flagellar arms); acquisition of genes for tolerating terrestrial stresses (e.g., variation in temperature and water availability); and the development of the auxin and abscisic acid signaling pathways for coordinating multicellular growth and dehydration response. The Physcomitrella genome provides a resource for phylogenetic inferences about gene function and for experimental analysis of plant processes through this plant's unique facility for reverse genetics. 相似文献
5.
G. Elizabeth Pluhar DVM MS Russell L. Tucker DVM Patrick R. Gavin DVM PhD Rodney S. Bagley DVM Mitsuhiko Takeuchi DVM 《Veterinary radiology & ultrasound》1997,38(2):112-115
A new of performing cerebral sinus venography was developed that opacivies both the ventral and most of the dorsal venous sinus systems. A pediatric angiographic catheter was introduced into the external jugular vein and advanced to the level of the temporal sinus. Iodinated contrast medium was injected manually and radiographs were made. Subtraction radiography was used to visualize vessels field wit contast medium. Venography was simple and relatively non-invasive and was considered safe. The technique was used to confirm occlusion of the transverse venous sinus in healthy dogs that had undergone radical craniectomies. 相似文献
6.
Zamoto A Tsuji M Wei Q Cho SH Shin EH Kim TS Leonova GN Hagiwara K Asakawa M Kariwa H Takashima I Ishihara C 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2004,66(7):785-792
We previously reported that small wild rodents in Japan harbor two types of novel Babesia microti-like parasites (designated as Hobetsu and Kobe types), but not the type commonly found in the northeastern United States (U.S. type) where human babesiosis is endemic. To determine whether these new types of parasites are distributed in places surrounding Japan, an epizootiologic survey was undertaken in three geographically distant areas in northeastern Eurasia; South Korea, Vladivostok in Russia, and Xinjiang in China. Blood samples were collected from a total of 387 animals comprising 24 species. DNAs extracted from the samples were tested by nested PCR targeting babesial nuclear small-subunit rRNA gene (rDNA), which revealed that small rodents harboring B. microti exist in all three survey areas. Sequence analysis showed that all PCR-positive samples had rDNA sequences virtually identical to that of U.S.-type B. microti. However, when beta-tubulin gene sequences were compared, evident geographic variations were seen. By use of primers specific for each of the beta-tubulin genes of Kobe-, Hobetsu-, and U.S.-type parasites, a type-specific PCR was developed. Parasite with Hobetsu- or Kobe-type sequence was not detected from any of the three survey areas. These findings suggest that U.S.-type B. microti is widely distributed among small wild mammals in temperate zones of not only North America, but also Eurasia, whereas that Hobetsu- and Kobe-type parasites may be uniquely distributed in Japan. 相似文献
7.
Masashi?Hatamoto Takanori?Tanahashi Jun?Murase Kazuo?Matsuya Motoki?Hayashi Makoto?Kimura Susumu?AsakawaEmail author 《Biology and Fertility of Soils》2008,44(3):527-532
To estimate the succession and phylogenetic composition of the eukaryotic communities responsible for the decomposition of
rice straw compost under flooded conditions during the cultivation period of paddy rice, denaturing gradient gel electrophoresis
(DGGE) analysis targeting 18S rDNA followed by sequencing was conducted in a Japanese paddy field. The eukaryotic communities
in rice straw compost incorporated into the flooded paddy field were influenced by the mid-season drainage and mainly composed
of fungi (Ascomycota, Zygomycota, and Chytridiomycota) and protozoa (Ciliophora, Euglyphida, and Dactylopodida), most of which
existed continuously during the cultivation period of paddy rice. The results indicated that these eukaryotic members were
associated with the decomposition of rice straw compost in paddy field soil directly or indirectly. 相似文献
8.
Tomoya TAKAHASHI Akihiro MORI Hitomi ODA Isao MURAYAMA Mitsuhiko KOUNO Toshinori SAKO 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2021,83(2):260
Changes in lipoprotein profiles occur in dairy cows during the periparturient period and in cows with transition cow disease. Here, the lipoprotein profiles of Holstein–Friesian dairy cows during the periparturient period were obtained by anion-exchange, high-performance liquid chromatography to evaluate the usefulness of lipoprotein profile evaluation during the periparturient period and in cows with fatty liver and milk fever. Lipoprotein levels (including total and high- (HDL-C) and low-density lipoprotein (LDL-C) cholesterol) in 10 healthy cows were low 4 weeks prepartum, with the lowest values at calving or within 1 week of calving; the values increased at 8 weeks postpartum. The lipoprotein levels were measured in 16 cows diagnosed with fatty liver (n=10) or milk fever (n=6) and compared to 10 healthy dairy cows. A significant difference was observed in HDL-C between healthy cows (at calving and 1 week postpartum), and the fatty liver and milk fever cows. Cows with fatty liver and milk fever had a lower mean HDL-C than the 10 healthy dairy cows at calving and 1 week postpartum. HDL-C might be a good indicator of energy balance for differentiating healthy cows from those with transition cow disease. 相似文献
9.
A comparison of changes in stable isotope ratios in the epidermal mucus and muscle tissue of slow‐growing adult catfish
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Atsushi Maruyama Emi Tanahashi Takanobu Hirayama Ryuji Yonekura 《Ecology of Freshwater Fish》2017,26(4):636-642
Although stable isotope analysis is a powerful tool for determining diet, migration patterns and the structure of food webs in aquatic systems, the slow response of isotopic ratios in the widely used muscle tissue often hampers this approach, particularly in slow‐growing or adult fishes. We conducted a diet‐switch experiment to compare the changes in the stable carbon isotope ratio (δ13C values) in the epidermal mucus and muscle tissue of five‐year‐old catfish (Silurus asotus). The isotope ratios in noninvasively sampled mucus changed more rapidly than those in the muscle tissue. As isotopic change in mucus was relatively rapid, this technique can be used over a finer timescale than traditional isotopic analyses using the muscle tissue. The isotopic change half‐life in our experimental condition was 200 days, which would not be short enough for some research purposes. Examining mucus along with the muscle would enable food habits of slow‐growing fishes to be determined over different timescales. However, the rate of isotopic change in the mucus was negatively affected by the size of fish and was slower than the previously reported rates in juvenile steelhead. These findings suggest that mucus turnover rates need to be determined prior to the field data interpretation. 相似文献
10.
Yohei Nakamura Masahiro Horinouchi Mitsuhiko Sano Takuro Shibuno 《Fisheries Science》2009,75(6):1401-1408
Whilst the importance of seagrass beds as nurseries for coral reef fishes has been clearly recognized, the vast majority of
early studies on fish nursery habitats emphasized the close proximity of the latter to coral reefs. To determine the potential
nursery role of isolated seagrass beds, we investigated the degree to which juvenile emperor fishes (Lethrinidae) utilized
seagrass beds in the presence/absence of adjacent coral habitats at Ishigaki Island (southern Japan), such fishes being known
to use seagrass beds as nurseries. Seagrass beds in close proximity to coral habitats (distance between the two habitats of
50–200 m) had greater densities of lethrinid juveniles than those without adjacent coral habitats (2.5–4 km) for 3 different
sites investigated, although a significant difference was obtained only for 1 site. Juveniles of Lethrinus atkinsoni, L. obsoletus, L. harak, and L. nebulosus were observed in seagrass beds with and without adjacent coral habitats, whereas L. ornatus occurred only in the former. Overall, most lethrinid juveniles utilize seagrass beds irrespective of the presence of adjacent
adult coral habitat, suggesting that both types of seagrass beds would contribute to lethrinid adult populations. Therefore,
management efforts for lethrinid populations should be applied not only to contiguous coral-seagrass habitat systems but also
to isolated habitats. 相似文献