Estimating aboveground carbon using airborne LiDAR in Cambodian tropical seasonal forests for REDD+ implementation     

Tetsuji Ota  Tsuyoshi Kajisa  Nobuya Mizoue  Shigejiro Yoshida  Gen Takao  Yasumasa Hirata  Naoyuki Furuya  Takio Sano  Raul Ponce-Hernandez  Oumer S. Ahmed  Heng Sokh  Vuthy Ma  Eriko Ito  Jumpei Toriyama  Yukako Monda  Hideki Saito  Yoshiyuki Kiyono  Sophal Chann  Nang Ket 《Journal of Forest Research》2015,20(6):484-492

  相似文献   

Comparing 30-year diameter censuses and tree-ring chronologies in natural old-growth Cryptomeria japonica forest on Yakushima Island,Japan     

Shizu Itaka  Shigejiro Yoshida  Nobuya Mizoue  Tetsuji Ota  Atsushi Takashima  Tsuyoshi Kajisa 《Journal of Forest Research》2015,20(2):255-262

  相似文献   

Fish feed can show genotoxic damage     

Ota  Erika do Carmo  Cardoso  Claudia Andrea Lima  Inoue  Luis Antonio Kioshi Aoki  Zanon  Ricardo Basso  Silva  Tarcila Souza de Castro 《Fish physiology and biochemistry》2022,48(3):735-748

Fish Physiology and Biochemistry - The present study was carried out to evaluate the genotoxic potential of nutritional quality of feed, using erythrocytic nuclear abnormalities assay in Nile...  相似文献   

Photoperiod influences the growth, food intake, feed efficiency and digestibility of red sea bream (Pagrus major)     

Amal K. Biswas  Manabu Seoka  Yuya Inoue  Kenji Takii  Hidemi Kumai 《Aquaculture (Amsterdam, Netherlands)》2005,250(3-4):666-673

Two consecutive trials were conducted to investigate the effects of photoperiod manipulation on growth rate, food intake and feed conversion efficiency (Trial 1), and the digestibility of nutrients and energy (Trial 2) in red sea bream, Pagrus major (body weight 19–120 g). Fish were exposed to four photoperiods (6L:6D, 12L:12D, 16L:8D and 24L:0D) with light intensity 1500 lx on the water surface. The fish were fed with a commercial diet to apparent satiation. In Trial 2, 0.5% chromic oxide (Cr₂O₃) was used as an inert marker. Significantly higher weight gain and specific growth rates were observed in fish exposed to a 24L:0D photoperiod followed by 16L:8D, 6L:6D and 12L:12D photoperiods (P < 0.05). Food intake and feed conversion efficiency (FCE) were also significantly higher in fish exposed to 24L:0D followed by 16L:8D, 6L:6D and 12L:12D photoperiods (P < 0.05). Fish exposed to 24L:0D and 16L:8D photoperiods showed significantly higher lipid and energy digestibility than those exposed to a 12L:12D photoperiod (P < 0.05). The results demonstrated that the enhancement of growth performances under 16L:8D and 24L:0D photoperiods were attributed to improved appetite, greater food intake and higher feed conversion efficiency as well as higher digestibility.  相似文献   

EMG telemetry studies on upstream migration of chum salmon in the Toyohira river,Hokkaido, Japan     

Makiguchi Y  Konno Y  Konishi K  Miyoshi K  Sakashita T  Nii H  Nakao K  Ueda H 《Fish physiology and biochemistry》2011,37(2):273-284

The movements of 28 adult chum salmon, Oncorhynchus keta (Walbaum) tagged with electromyogram (EMG) transmitters were tracked along the Toyohira river, Hokkaido, Japan, in October of 2007 and 2008 to investigate and evaluate the upstream migratory behavior through the protection bed and fishway of ground sills. The approach time of fish that ascended successfully through the protection bed and fishway was shorter than that of unsuccessful fish. The unsuccessful fish were observed to swim in currents with high water velocity and shallow water depth at swimming speeds that exceeded their critical swimming speed (U _crit) during the approach to these structures. In consequence, unsuccessful fish frequently alternated between burst and maximum sustained speeds without ever ascending the fishway, and eventually became exhausted. It is important that fishway are constructed to enable chum salmon to find a passage way easily, so that they can migrate upstream rapidly without wasting excessive energy.  相似文献   

Intersection of the RNA interference and X-inactivation pathways   总被引：1，自引：0，他引：1  

Ogawa Y  Sun BK  Lee JT 《Science (New York, N.Y.)》2008,320(5881):1336-1341

In mammals, dosage compensation is achieved by X-chromosome inactivation (XCI) in the female. The noncoding Xist gene initiates silencing of the X chromosome, whereas its antisense partner Tsix blocks silencing. The complementarity of Xist and Tsix RNAs has long suggested a role for RNA interference (RNAi). Here, we report that murine Xist and Tsix form duplexes in vivo. During XCI, the duplexes are processed to small RNAs (sRNAs), most likely on the active X (Xa) in a Dicer-dependent manner. Deleting Dicer compromises sRNA production and derepresses Xist. Furthermore, without Dicer, Xist RNA cannot accumulate and histone 3 lysine 27 trimethylation is blocked on the inactive X (Xi). The defects are partially rescued by truncating Tsix. Thus, XCI and RNAi intersect, down-regulating Xist on Xa and spreading silencing on Xi.  相似文献   

A SIMPLE BIRD HOLDER FOR USE IN AVIAN MALARIA STUDIES     

Ota RK  Beckman H 《Science (New York, N.Y.)》1943,97(2521):384

  相似文献   

Ecology of Armillaria species on conifers in Japan     

E. Hasegawa  Y. Ota  T. Hattori  N. Sahashi  T. Kikuchi 《Forest Pathology》2011,41(6):429-437

Distribution, host preference and pathogenicity of Japanese Armillaria species on conifers were investigated on the basis of field collections of 65 isolates. We identified seven Armillaria species from 19 conifer species including six major Japanese plantation conifers using mating tests and sequences of the translation elongation‐1 α gene. Armillaria mellea, Armillaria ostoyae, Armillaria cepistipes and Armillaria sinapina were frequently collected, whereas Armillaria nabsnona, Armillaria tabescens and a biological species Nagasawa’s E were rare. On the basis of host condition when the isolates were collected, A. mellea, A. ostoyae, A. cepistipes and A. tabescens are considered as moderate to aggressive pathogens of conifers in Japan.  相似文献   

不同土壤改良剂对大豆富集重金属的影响   总被引：1，自引：0，他引：1  

董明芳  范稚莲  莫良玉  韦玉娅 《土壤》2016,48(4):748-753

在广西环江开展了土壤改良剂对大豆富集重金属的影响研究,结果表明:土壤改良剂(煤灰、菌渣、蚕沙)均能在大豆苗期、结荚期和成熟期有效降低大豆中重金属含量。菌渣对大豆苗期重金属抑制效果最好,蚕沙对成熟期重金属吸收的抑制效果最佳,而煤灰在结荚期抑制重金属效果优于其他的改良剂,并且对减少大豆籽粒中重金属含量作用效果最好。  相似文献   

Synthesis of morphiceptin (Tyr-Pro-Phe-Pro-NH(2)) by dipeptidyl aminopeptidase IV derived from Aspergillus oryzae     

Ota T  Itoh A  Tachi H  Kudoh K  Watanabe T  Yamamoto Y  Tadokoro T  Maekawa A 《Journal of agricultural and food chemistry》2005,53(15):6112-6116

Morphiceptin (Tyr-Pro-Phe-Pro-NH(2)), tetrapeptide, was synthesized using dipeptidyl aminopeptidase IV (DP IV, EC 3.4.14.5) derived from Aspergillus oryzae RIB 915 as a catalyst. Tyr-Pro-OEt was incubated with Phe-Pro-NH(2) in the presence of DP IV under various conditions of temperature, concentrations of ethylene glycol, pH, reaction time, and others. Morphiceptin was obtained at 40% yield under the optimal reaction conditions: substrate, 4 mM Tyr-Pro-OEt.HCl and 20 mM Phe-Pro-NH(2).HCl; enzyme, DP IV, 0.275 nkat; solvent, 60% ethylene glycol containing 20 mM phosphate buffer at pH 7.0; amine, 4.2 mM diisopropylamine at 4 degrees C for 24 h. Amino group protection was unnecessary for synthesis of morphiceptin by DP IV.  相似文献