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71.
Methane uptake and nitrous oxide emission in Japanese forest soils and their relationship to soil and vegetation types 总被引:1,自引:1,他引:1
Tomoaki MORISHITA Tadashi SAKATA Masamichi TAKAHASHI Shigehiro ISHIZUKA Takeo MIZOGUCHI Yoshiyuki INAGAKI Kazuhiko TERAZAWA Satoshi SAWATA Masanori IGARASHI Hiroshi YASUDA Yasuhiro KOYAMA Yoshihito SUZUKI Nobuyuki TOYOTA Masamichi MURO Masaru KINJO Hirokazu YAMAMOTO Daitaro ASHIYA Yoichi KANAZAWA Tetsu HASHIMOTO Hidetaka UMATA 《Soil Science and Plant Nutrition》2007,53(5):678-691
72.
Dominique Robert Akinori Takasuka Sayaka Nakatsuka Hiroshi Kubota Yoshioki Oozeki Hiroshi Nishida Louis Fortier 《Fisheries Science》2010,76(2):183-188
We tested whether the predation dynamics of chub mackerel Scomber japonicus and spotted mackerel S. australasicus on young anchovy Engraulis japonicus relates to individual growth characteristics of the prey and could account for the growth-selective survival predicted by
recruitment hypotheses. Juvenile and adult mackerel were sampled along with their young anchovy prey field in 2004 (juvenile
mackerel and larval anchovy) and 2005 (adult mackerel and juvenile anchovy) off the Pacific coast of Honshu, Japan. The recent
5-day mean growth rate of larval and juvenile survivors and prey found in the stomach of mackerel was estimated from the otolith
microstructure. No significant difference was found between the recent growth of larval or juvenile survivors and that of
preyed individuals. We conclude that despite a relatively small body size, the high activity level and predation skills displayed
by mackerel prevent fast-growing larvae and early juveniles from benefitting in terms of the expected survival advantage over
slow-growers. Hence, growth-selective predation mortality of larval fish would depend on the feeding ecology of the predator
rather than predator size. Selection for fast growth is more likely to occur under predation pressure from invertebrate organisms
and small pelagic fish specialized on zooplankton, such as herring and anchovy. 相似文献
73.
The nasal conchae of the pika and volcano rabbit were studied by gross examination and by serial histological sections stained with hematoxylin. The organization of the nasal conchae were compared with those of the domestic rabbit, with the goal of providing data for the determination of taxonomic relationship of the pika and the volcano rabbit to the domestic rabbit. This relationship is of interest because of a recent classification of these animals as Lagomorphs. 相似文献
74.
The fine structure of the blood-testis barrier in the boar 总被引:1,自引:0,他引:1
75.
The concentration of parvalbumin was determined in various types of chicken muscle by immunological analysis and was compared with that of myoglobin. Parvalbumin was present specifically in skeletal muscle and absent in cardiac and gizzard muscle; exceptionally, neither parvalbumin nor myoglobin was detected in white breast muscle. The wing and leg red muscles, which had larger amounts of myoglobin, contained smaller quantities of parvalbumin. In these muscles, the concentration of parvalbumin was inversely related to that of myoglobin (correlation coefficient = -0.69). Both myoglobin and parvalbumin were observed in the legs of 18-d-old embryos; the parvalbumin content exceeded that of myoglobin until the birds were 4 to 6 weeks old, but the relationship was reversed thereafter. Myoglobin in gizzard muscle was present in 18-d-old embryos and increased markedly at hatching; it was already present in cardiac muscle at an early embryonic stage, increasing gradually until 14 weeks after hatching. 相似文献
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79.
Tomoyuki Suzuki Kritapon Sommart Wanna Angthong Thu Van Nguyen Anan Chaokaur Peerapot Nitipot Arun Phromloungsri Yimin Cai Takashi Sakai Takehiro Nishida Fuminori Terada Tomoyuki Kawashima 《Animal Science Journal》2018,89(9):1287-1295
We conducted a meta‐data analysis to develop prediction equations to estimate enteric methane (CH4) emission from beef cattle in Southeast Asia. The dataset was obtained from 25 studies, which included 332 individual observations on nutrient intakes, digestibilities, and CH4 emissions. Cattle were provided tropical forage or rice straw, with or without concentrates in individual pens equipped with indirect open‐circuit head hood apparatus. The simplest and best equation to predict daily CH4 emission was CH4 (g/day) = 22.71 (±1.008) × dry matter intake (DMI, kg/day) + 8.91 (±10.896) [R2 = 0.77; root mean square error (RMSE) = 19.363 g/day]. The best equation to predict CH4 energy as a proportion of gross energy intake (CH4‐E/GEI, J/100 J) was obtained using DMI per body weight (DMIBW, kg/100 kg), content (g/100 g DM) of ether extract (EE) and crude protein (CP), and DM digestibility (DMD, g/100 g); CH4‐E/GEI = ?0.782 (±0.2526) DMIBW ? 0.436 (±0.0548) EE ? 0.073 (±0.0218) CP + 0.049 (±0.0097) DMD + 8.654 (±0.6517) (R2 = 0.39; RMSE = 1.3479 J/100 J GEI). It was indicated that CH4 emissions from beef cattle in Southeast Asia are predictable using present developed models including simple indices. 相似文献
80.