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851.
Okamoto Mineo Yap Minlee Roeroe Andreus Kakaskasen Nojima Satoshi Oyamada Kumi Fujiwara Shuichi Iwata Itaru 《Fisheries Science》2010,76(2):343-353
The growth of Acropora in Sekisei Lagoon was investigated in situ using ceramic coral settlement devices (CSDs) and marine blocks (MBs) with small
holes on their surfaces that were deployed prior to a mass spawning event. Acropora that had settled in 10-mm holes on the upper surface of the MBs were found to have grown inwards after 348 days post-mass
spawning. After 733 days, the colonies had grown outwards, encrusting the blocks and attaining a maximum diameter of 21.5 mm
(3.7 mm). CSDs that had been stacked above each other on frames were separated and observed in situ on 405 and 764 days after
mass spawning. After 405 days, the maximum diameter of the encrusting Acropora was 7.6 mm (±2.4 mm), which increased to 19.4 mm (±5.5 mm) after 764 days, with 30% of colonies extending short branches.
The length of the branches of Acropora grown on the CSDs fixed to the MBs 3 months after the mass spawning event exceeded the size of the encrusting portion of
the colony 629 days after spawning. The mortality of colonies between 1 and 2 years was slight, with the temperatures conducive
to coral bleaching that occurred during the study also having only a slight effect. 相似文献
852.
Satoshi Suyama Kazuhiro Oshima Masayasu Nakagami Atsushi Kawabata 《Fisheries Science》2011,77(2):223-233
We evaluated the seasonal changes in otolith and somatic growth of age-0 Pacific saury Cololabis saira in 223 fish collected between June and November 2002. We calculated the age in days of each individual by measuring otolith
growth increments under a scanning electron microscope. The age was correlated with body length and otolith radius. We also
observed seasonal changes in the rate of increase in body length and otolith radius and in the pattern of otolith growth.
Until August, both body length and otolith radius increased with age. Thereafter, the otolith radius continued to increase,
whereas the rate of somatic growth decreased. As a result, the ratio of otolith radius to body length increased. After August,
the percentage of otoliths with unreadable increments on their edge increased due to the formation of hyaline zones. Otoliths
grew both radially and in thickness until July, but gradually stopped growing in thickness after August. Beginning in October,
more than 80% of otoliths only grew radially. After August, the otolith not only continued growing but the morphological growth
pattern also changed. 相似文献
853.
Murata K Nii R Sasaki E Ishikawa S Sato Y Sawabe K Tsuda Y Matsumoto R Suda A Ueda M 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2008,70(2):203-205
An adult male white eared-pheasant (Crossoptilon crossoptilon) at a Japanese zoo exhibited lethargy and emaciation. Microscopic examination of a blood smear revealed a haemosporidian parasitic infection. Based on the morphological characteristics and molecular analysis of the parasite, it was identified as Plasmodium (Bennettinia) juxtanucleare. This is the first report of P. juxtanucleare infection in bird species belonging to the genus Crossoptilon. Caution against avian malaria infection is required for the conservation of endangered bird species in zoos. 相似文献
854.
Satoshi KAMOTO Masahiro SHINADA Daiki KATO Masaya TSUBOI Sho YOSHIMOTO Ryohei YOSHITAKE Shotaro ETO Namiko IKEDA Yosuke TAKAHASHI Yuko HASHIMOTO James CHAMBERS Kazuyuki UCHIDA Shinji YAMADA Mika K. KANEKO Ryohei NISHIMURA Yukinari KATO Takayuki NAKAGAWA 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2021,83(11):1795
Podoplanin is expressed in various human tumors where it promotes tumor progression, epithelial-mesenchymal transition, and distant metastasis. Podoplanin is also expressed in cancer-associated fibroblasts and induces tumor malignancy. The objective of this study was to evaluate podoplanin expression in various types of feline tumor tissues. Immunohistochemical analysis revealed that podoplanin was expressed in cells of 13/15 (87%) squamous cell carcinomas and 5/19 (26%) fibrosarcomas. Moreover, cancer-associated fibroblasts expressed podoplanin in most tumor types, including 18/21 (86%) mammary adenocarcinoma tissues. Our findings demonstrate that various types of feline tumor tissues expressed podoplanin, indicating the importance of the comparative aspects of podoplanin expression, which may be used as a novel research model for podoplanin biology. 相似文献
855.
Megumi ITOH Yasuhiro NAKAJIMA Kouki KUWANO Daisuke MAEDA Yoshie SAKURAI Yoshitaka MATSUI Satoshi KAWAMOTO 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2022,84(2):193
We previously reported the possibility of using the electrocardiogram variable to estimate blood calcium (Ca) concentration in dairy cows based on the strong positive correlation between the blood Ca concentration and the inverse of the corrected ST peak interval (STc−1). To improve the accuracy of the estimation of blood Ca concentration, we investigated the relationship between blood Ca concentration and STc−1 for each postpartum day and available variables other than STc−1. We measured multiple variables (milk yield, calving number, age, body temperature, etc.), including serum total Ca concentration (tCa), blood ionized Ca concentration (iCa) and STc−1 in 462 Holstein cows on days 0, 1, 2, 3, 5, and 7 postpartum. A very high correlation was observed between iCa and tCa. The association between tCa and STc−1 for each postpartum day had a high coefficient of determination of 0.61–0.79 postpartum 0–2 days but decreased after the third day. In the investigation using the data from postpartum days 0–2, STc−1, heart rate interval, calving number, and age were highly correlated with tCa. In addition, a multiple regression equation was obtained with tCa as the objective variable and STc−1 and calving number as explanatory variables. The estimation accuracy was improved as compared with the simple regression equation using only STc−1 as the explanatory variable. This multiple regression equation was used for 11 cows suspected of having hypocalcemia, and it was able to correctly detect cows requiring early treatment, except for one cow. 相似文献
856.
Taichi Masu Satoshi Watanabe Shigeru Aoki Satoshi Katayama Masaaki Fukuda Akinori Hino 《Fisheries Science》2008,74(1):41-47
ABSTRACT: The conventional acetate peel method was modified to analyze the shell growth pattern of juvenile Manila clam Ruditapes philippinarum as small as 2 mm in shell length (SL). In the outer shell layer along the axis of maximum growth, two types of growth increments were observed: distinct increments and indistinct increments, which, respectively, do and do not continue to the middle shell layer. The distinct increments were found to be formed every two days in intertidal and shallow subtidal zones by field enclosure experiments of juveniles with datum points marked with alizarin complexone. Growth patterns of juveniles (12 mm SL) collected from the Seaside Park of Yokohama in Tokyo Bay were analyzed to confirm the modified method. Mean daily shell growth rate from April to July 2005 ranged 120–142 μm/day, which was reasonable as compared with previous studies. It was impossible to backcalculate the growth to the settlement size (i.e. 0.2 mm SL) because of erosion of the outer shell surface, and the smallest backcalculated minimum shell length was 0.8 mm. Fluctuations in daily growth rate were high, ranging 29–315 μm/day, and did not show a clear two-weekly rhythm. 相似文献
857.
Fisheries Science - Identification of the population structure of harvested species is the first step in the management of wild fisheries. Although the marbled rockfish Sebastiscus marmoratus is a... 相似文献
858.
Shiro JIMI Arman SAPAROV Seiko KOIZUMI Motoyasu MIYAZAKI Satoshi TAKAGI 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2021,83(12):1933
Hypertrophic scars found on the human body rarely develop in experimental animals, possibly due to their looser skin structure. This makes it difficult to understand the genesis of scar lesions. Therefore, appropriate animal models are urgently needed. In this study, we established a novel experimental model of a scar-forming wound by resecting a small portion of the abdominal muscle wall on the lower center of the abdomen in C57BL/6N mice, which are exposed to contractive forces by the surrounding muscle tissue. As a low-tension control, a back skin excision model was used with a splint fixed onto the excised skin edge, and granulation tissue formed on the muscle fascia supported by the back skeleton. One week after the resection, initial healing reactions, such as fibroblast proliferation, occurred in both models. However, after 21 days, lesions with collagen-rich granulation tissues, which were also accompanied by multiple nodular/spherical-like structures, developed only in the abdominal wall model. These lesions were analogous to scar lesions in humans. Therefore, the animal model developed in this study is unique in that fibrous scar tissues form under physiological conditions without using any artificial factors and is valuable for studying the pathogenesis and preclinical treatment of scar lesions. 相似文献
859.
Naoyuki MATSUMOTO Akira KAWAKAMI Satoshi IZUTSU 《Journal of General Plant Pathology》2000,66(2):103-108
The distribution pattern and frequency of isolates of a snow mold fungus, Typhula ishikariensis biotype A belonging to a predominant MCG (mycelial compatibility group, referred to as super MCG), were surveyed throughout
its habitat from northern Honshu to eastern Hokkaido. About 38 and 14% of isolates examined belonged to super MCG in eastern
and central Hokkaido, respectively ; however, super MCG was never found in southern Hokkaido or northern Honshu. These findings
imply that T. ishikariensis biotype A consists of two populations in Japan, i.e., one that is distributed in Honshu and southern Hokkaido and lacks super MCG isolates, and the other that includes super
MCG isolates and exists in central and eastern Hokkaido. The difference in distribution pattern of the two populations is
discussed in terms of geological history during the Pleistocene (2 million to 10 thousand years ago). The tendency of global
warming, which alleviates freezing damage, was considered to be responsible for the outbreak of this fungus in eastern Hokkaido.
Received 6 December 1999/ Accepted in revised form 9 December 1999 相似文献
860.
Yoshio Awaya Nobuhiko Tanaka Kunihiro Tanaka Gen Takao Eiji Kodani Satoshi Tsuyuki 《Journal of Forest Research》2000,5(4):247-258
The relationship between the stand parameters (top layer height (H1) and volume/ha (Vha)) and digital number (DN) were evaluated
for evergreen conifer stands using three airborne images with 4-m spatial resolution, which were taken in June 1995, September
1993, and October 1994 using the Compact Airborne Spectrographic Imager (CASI). Estimation accuracy of the stand parameters,
their seasonal changes, and suitable wavelength were analyzed using correlation coefficients and a regression analysis. The
minimum DN of stands, which showed the darkness of a canopy shadow, had a higher correlation with H1 than the average and
maximum DN while the average DN had a higher correlation with Vha. The green channels gave the highest correlation coefficients
with H1 and Vha, which exceeded — 0.9 for the September and October images. However, the red channels had a consistently high
correlation with the stand parameters for the three images. The near infrared channels gave poor correlations with H1 and
Vha for the June image. Spectral variations among trees may affect the relationship between DN and the stand parameters in
the leaf maturation period in June. Consequently, the late growing season was better at giving consistent results for the
stand parameter studies. There was a linear relationship between the measured and the estimated stand parameters for the validation
plots especially for the H1 case of September with sufficient accuracy. Nadir viewing images, which had high spatial resolution
and a wide dynamic range such as the CASI images, were necessary to estimate the stand parameters accurately.
This study was also partly supported by the research project, ‘A Study of Accurate Biomass Estimation using Airborne Imagery,’
of the Science and Technology Agency of Japan. Comments from the editors helped improve the contents of the paper. 相似文献