著者

Yoshinori SHIGETA Kai MATSUBARA

出版者

Center for Environmental Information Science

雑誌

Journal of Environmental Information Science (ISSN:03896633)

巻号頁・発行日

vol.2021, no.1, pp.84-89, 2021-10-08 (Released:2021-10-09)

参考文献数

6

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In this study, we used the thermal stress index (THI) to clarify the relationship between temperature and utilization rate (length of stay) in domestic female Japanese Saanen hybrid goats (Capra aegagrus hircus), assessing changes across three temperature ranges: high temperature, optimal temperature, and low temperature. We also analyzed the effects of meteorological changes on utilization. We found that, under high temperatures, the indoor utilization rate was 61.8% and that animals spent more time indoors than outdoors, despite higher heat stress indoors. Based on this result, we performed a correlation analysis between meteorological factors and utilization rate, but no significant relationship between solar radiation or wind speed and utilization rate was found in the high-temperature environment. It was concluded that the reason for the high indoor utilization rate is that the outdoor foraging behavior decreased and the resting behavior increased because the heat production and physical fitness consumption by the ruminant were suppressed.

著者

Ryohei YAMASHITA Taichi IGARASHI

出版者

Center for Environmental Information Science

雑誌

Journal of Environmental Information Science (ISSN:03896633)

巻号頁・発行日

vol.2022, no.1, pp.48-55, 2022-10-26 (Released:2022-10-26)

参考文献数

14

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The hypothesis of the beneficial effects of agricultural activities on the maintenance of positive health conditions has been empirically tested using several data sets. However, the association between good health and agricultural activities has not been examined across a wide geographical area, and no convincing census has yet been obtained. This study used big data to test the hypothesis. Medical receipt data, which represent a form of big anonymous data, were used as objective indicators of health conditions. The extent of agricultural activities conducted in particular regions was estimated from the census of agriculture and forestry, and comparisons were then affected by the health conditions of the specified areas. The use of medical receipt data is restricted because such data can directly indicate the health conditions of individual residents. This study set the unit of analysis as multiple neighboring cities and towns to avoid constraints on data use. The analysis results revealed that the reduction of agricultural activity paralleled the deterioration of health conditions in some regions. However, the study did not confirm the overall apparent effects of agricultural activity on the amelioration or deterioration of health conditions. More determinate knowledge may be attained by separately reviewing the data on agricultural activities and health and by extending the period of data collection.

著者

Tomohiro ICHINOSE Satoru ITAGAWA Yumi YAMADA

出版者

Center for Environmental Information Science

雑誌

Journal of Environmental Information Science (ISSN:03896633)

巻号頁・発行日

vol.2019, no.1, pp.53-59, 2019-09-30 (Released:2019-09-30)

参考文献数

11

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A magnitude 9.0 earthquake struck off northeastern Japan on 11 March 2011. The subsequent tsunami wrought destruction on a massive scale. Kesennuma City was one of the most heavily damaged regions in Miyagi Prefecture, where more than 1000 people were killed by the tsunami and resulting fire; 215 people are still missing. Here we analyzed historical landuse changes in the tsunami-affected area of Kesennuma city center, Miyagi Prefecture, using topographic maps from 1913 and 1952 and vegetation maps from 1979 and 2011. The area consisted of 7.3% urban land use, 10.5% dry field, 55.5% rice paddy field, 4.7% wetland, 0.3% grassland, 5.3% forest, and 16.3% water body in 1913 and 76.1% urban land use, 1.7% dry field, 17.9% rice paddy field, 0.9% wetland, 1.6% forest, and 1.6% water body in 2011. During the period, the area of urban land use increased more than 10-fold, while that of rice paddy field sharply decreased from 55.5% to 17.9%. The 77 Bank estimated that the total economic damage in Kesennuma City was 232.4 billion yen, representing annual production value of all companies located in the damaged area. Our calculations for urban land use, dry field, and rice paddy field showed losses of 112.7 billion yen and 69 million yen due to the tsunami in the areas of urban and agricultural land use, respectively.