First report of Choanephora rot of ice plant (<Emphasis Type="Italic">Mesembryanthemum crystallinum</Emphasis>) caused by <Emphasis Type="Italic">Choanephora cucurbitarum</Emphasis> in Japan     

Satoshi Kagiwada  Yusuke Kayano  Hideo Hoshi  Takeshi Kawanishi  Kenro Oshima  Hiroshi Hamamoto  Hiromichi Horie  Shigetou Namba 《Journal of General Plant Pathology》2010,76(5):345-347

In summer 2007, leaf and stem rot of ice plants was found in a hydroponic greenhouse in Japan. The causal agent was a fungus identified as Choanephora cucurbitarum (Berkeley & Ravenel) Thaxter, based on pathogenicity, morphology, mating tests, and sequence analysis of the ribosomal DNA ITS region.  相似文献   

Genetic dissection of quantitative trait loci for berry traits in interspecific hybrid grape (Vitis labruscana × Vitis vinifera)     

Yusuke Ban  Nobuhito Mitani  Akihiko Sato  Atsushi Kono  Takeshi Hayashi 《Euphytica》2016,211(3):295-310

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Henneguya lateolabracis sp. n. (Myxozoa: Myxosporea), the causative agent of cardiac henneguyosis in Chinese sea bass Lateolabrax sp.     

Hiroshi  YOKOYAMA  Hidemasa  KAWAKAMI  Hiroshi  YASUDA  Shinji  TANAKA 《Fisheries Science》2003,69(6):1116-1120

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Age and growth of the silky shark Carcharhinus falciformis from the Pacific Ocean     

SHUNGO  OSHITANI  HIDEKI  NAKANO  SHO  TANAKA 《Fisheries Science》2003,69(3):456-464

ABSTRACT:   The present study estimated the age and growth of the silky shark Carcharhinus falciformis in the Pacific Ocean. Samples and biological data were collected from Japanese tuna longline and purse seine fisheries from 1992 to 1999. Vertebra centra were picked from 145 males and 153 females for age determination. The number of annual rings observed for males and females was 0–8 and 0–13, respectively. Combined sex von Bertalanffy growth equations were obtained as follows: L_t  = 216.4(1 − e^{−0.148( t +1.76)}) where L_t is precaudal length in cm at age t . A mature size for males was considered to be approximately 135–140 cm (precaudal length), with an estimated age of 5–6 years, whereas corresponding values for females were 145–150 cm and 6–7 years, respectively. Birth size ranged from 48 to 60 cm. There was no remarkable difference in growth, birth size and age at maturity between the Pacific and Atlantic Oceans. The life history parameters of the silky shark are approximately the same in both oceans.  相似文献   

Morphometric and histochemical study of involution in the rat uterus after parturition     

Ayat Omer ELKHALIL  Yuko MAEJIMA  Masato AOYAMA  Hideyuki TANAKA  Shoei SUGITA 《Animal Science Journal》2005,76(4):313-323

Morphological changes to and collagen loss from the rat uterus during postpartum involution were investigated. The expression patterns of collagen type III and myeloperoxidase (MPO) were also determined. Morphological changes were studied on days 1, 3, 5, 10, 15, 20, 22 and 25 postpartum. As a control, diestrus rats’ uterine were used. Specimens from the uterine horn were embedded in paraffin, cut into 8 µm coronal sections, and stained with hematoxylin‐eosin. The thickness of the longitudinal and circular smooth muscle layers and of the endometrium were measured. The collagen content was determined using hydroxyproline analysis. Immunostaining was used to examine the expression of collagen type III on days 1, 3, 5, 10, 15 and 20 postpartum; and MPO on days 1, 3, 5, 10 and 22 postpartum. The thickness of the smooth muscle layers was found to decrease rapidly postpartum: the circular smooth muscle layer returned to that of a non‐pregnant, control uterus by day 5 postpartum and the longitudinal smooth muscle layer by day 15 postpartum. Eosinophilic cells were observed in the endometrial stroma adjacent to the myometrium on days 10, 15 and 20 postpartum, and were confirmed as collagenous cells. Immunostaining identified collagen type III positive cells in the vessel‐rich layer adjacent to the placental site on days 1, 3, 5 and 10 postpartum, and these cells were confirmed to be phagocytic. Postpartum reduction in the weight of the uterus was accompanied by decreases in both the collagen content and the thickness of the longitudinal and circular smooth muscle layers. Furthermore, the phagocytic cells were shown to express MPO during postpartum involution of the uterus.  相似文献   

Effects of calcium intake and parity on plasma minerals and bone turnover around parturition     

Yuko KAMIYA  Mitsuru KAMIYA  Masahito TANAKA  Shigeru SHIOYA 《Animal Science Journal》2005,76(4):325-330

Eight pregnant heifers (primiparous cows) and seven pregnant cows in their second, third and forth pregnancies (multiparous cows) were assigned to two groups and fed either a low calcium (Ca) diet (Ca, 0.46%) or a high Ca diet (Ca, 0.86%) ad libitum from 3 weeks before the expected calving date to 3 days after parturition. All cows were examined for a change in dry matter intake (DMI), plasma minerals and bone turnover around parturition. The dietary Ca level did not affect the DMI in both primiparous and multiparous cows. The DMI of primiparous cows was significantly lower than that of multiparous cows (P < 0.05) in both the low and high dietary Ca groups. The dietary Ca level did not affect the concentrations of plasma Ca, phosphorus, magnesium and parathyroid hormone throughout the experimental period. Plasma phosphorus in primiparous cows was significantly higher (P < 0.05) than that of multiparous cows around parturition. Plasma Ca and magnesium tended to be higher (P < 0.10) in primiparous cows. The dietary Ca level did not affect the plasma osteocalcin (OC) level measured as bone formation or the urinary deoxypyridinoline (DPD) excretion measured as bone resorption before parturition in both primiparous and multiparous cows. After parturition, the plasma OC level was lower than it was before parturition in multiparous cows fed a low Ca diet, and in primiparous cows. There were no significant differences in urinary DPD excretion between each group before and after parturition. Both the plasma OC level and urinary DPD excretion of primiparous cows were significantly higher than those of multiparous cows in both the low and high dietary Ca groups.  相似文献   

Effect of high environmental temperatures on ascorbic acid, sulfhydryl residue and oxidized lipid concentrations in plasma of dairy cows     

Masahito TANAKA  Yuko KAMIYA  Mitsuru KAMIYA  Yutaka NAKAI 《Animal Science Journal》2007,78(3):301-306

Information on oxidative stress under hot conditions from the levels of cells to organs and the whole body has accumulated in the last decades. Although a hot climate decreased dairy performance, changes of oxidative stress markers under hot conditions have remained obscure. Therefore, the effect of high environmental temperature on ascorbic acid, sulfhydryl (SH) residue and oxidized lipids concentrations in plasma from a total of 128 dairy cows was investigated. The monthly average maximum day temperature varied from 9.2°C in January to 32°C in August of 2004 in this institute. High ambient temperatures increased the rectal temperature of dairy cows up to 39.3°C in August. One of the reducing equivalents in plasma, SH residue concentration, decreased in July compared with December (P < 0.05). Another antiradical molecule, ascorbic acid concentration in plasma, also decreased in July (P < 0.01). The oxidative stress index, thiobarbituric acid reactive substance (TBARS), which was produced from the oxidation of polyunsaturated fatty acids under oxidative conditions, increased in summer (P < 0.05). A significant positive relationship of SH residue and ascorbic acid concentrations in the hot season was observed (P < 0.01). A negative correlation between rectal temperatures and ascorbic acid concentrations in the hot season was obtained (P < 0.01). However, TBARS concentration varied independently of the SH residue and ascorbic acid concentration. These results suggest that the response of oxidative stress markers of SH residue, ascorbic acid and TBARS concentration to oxidative stress under hot conditions were not shown to be the same, and that oxidative stress in dairy cows in the hot season increased.  相似文献   

Behavior, physiology, performance and physical condition of layers in conventional and large furnished cages in a hot environment     

Tsuyoshi SHIMMURA  Satoshi HIRAHARA  Yusuke EGUCHI  Katsuji UETAKE  Toshio TANAKA 《Animal Science Journal》2007,78(3):314-322

The aim of the present study was to compare old layers' level of welfare and performance between conventional and large furnished cages under hot environmental conditions. At the age of 80 weeks, 104 Boris Brown layers were divided into two groups: 12 conventional cages (two hens/cage) and four large furnished cages (20 hens/cage, 240 cm wide × 62 cm deep). The room temperature was set to fluctuate between 25 and 33°C in a day. The hens' behavior, immune response, performance and physical condition were measured. Aggression and moving were more frequent in furnished than in conventional cages (P < 0.05 for both items). Egg production (P < 0.05), egg mass (P < 0.05) and feed conversion ratio (P < 0.01) were better in conventional cages than in furnished cages. No significant differences were found in the birds' immune responses or physical condition between the cage designs. In conclusion, under a hot environment, the performance of old layers in large furnished cages was lower compared with that in small conventional cages, which might be due to their greater aggressive interactions. However, it was not evident that welfare level was lower in large furnished cages compared with conventional cages. Hereafter, additional studies about large furnished cages using young layers over a long term should be performed.  相似文献   

Valproic Acid,a Histone Deacetylase Inhibitor,Decreases Proliferation of and Induces Specific Neurogenic Differentiation of Canine Adipose Tissue-Derived Stem Cells     

Yasuhiro KURIHARA  Takehito SUZUKI  Motoharu SAKAUE  Ohoshi MURAYAMA  Yoko MIYAZAKI  Atsushi ONUKI  Takuma AOKI  Miyoko SAITO  Yoko FUJII  Masaharu HISASUE  Kazuaki TANAKA  Tatsuya TAKIZAWA 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2014,76(1):15-23

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Characterization of a Canine Tetranucleotide Microsatellite Marker Located in the First Intron of the Tumor Necrosis Factor Alpha Gene     

Masashi WATANABE  Kazuaki TANAKA  Tatsuya TAKIZAWA  Kazuhito SEGAWA  Sakurako NEO  Ryo TSUCHIYA  Michiko MURATA  Masaru MURAKAMI  Masaharu HISASUE 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2014,76(1):119-122

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