利尻島のショウジョウバエと生態(I) : トラップ採集 (original) (raw)
Japanese Journal of Applied Entomology and Zoology, 2011
Determination of wild host plants as possible sources of pest insects is important for integrated crop management in cultivated areas. We first clarified biotypes of the whitefly, Bemisia tabaci, infesting non-crop plants (36 species in 14 families) throughout the Ryukyu Islands, which are subtropical areas in Japan. The B biotype, the most common biotype on crop plants in this area, was found on 32 non-crop plant species (in 13 families), and frequently infested asteraceous and euphorbiaceous weeds; therefore, control of these weeds is important for integrated management of the B biotype in the Ryukyu Islands. The Nauru biotype had a narrower host range, and was found on 13 plant species (in 6 families). The Q biotype was found only once on a Solanum weed. One biotype belonging to the genetic group 'China' was identified from two plant species growing on the seashore.
琉球諸島におけるタバココナジラミバイオタイプの地理的分布と寄主作物
Japanese Journal of Applied Entomology and Zoology, 2011
タバココナジラミ Bemisia tabaci (Gennadius) (カメムシ 目：コナジラミ科)は世界に広く分布し，多くの作物を加 害する重要害虫である．本種による作物への被害は，直接 の吸汁害による生育遅延のほか，トマト黄化葉巻病を引き 起こす Tomato yellow leaf curl virus(TYLCV)やメロン退緑 黄化病を引き起こす Cucurbit chlorotic yellows virus(CCYV) 日本応用動物昆虫学会誌(応動昆) 第 55 巻 第 1 号： 9-17(2011)
Landscape Research Japan Online, 2015
：There is a growing attention to the concept of the coupled social-ecological system (SES) where human and biophysical systems are intricately linked. This recognition calls for a more integrated approach for the sustainable use and conservation of ecosystems and biodiversity. In this paper, we identified hotspot of social-ecological production landscapes (SEPLs) of the Noto Peninsula, Ishikawa, where both human-perceived social and physically measured ecological values overlap. Questionnaire survey was conducted targeting at residents of and (potential) visitors to the Noto Peninsula to explore human-perceived landscape values of the study area. The result of questionnaire survey was geo-referenced to develop value surfaces of twelve landscape values with a Geographic Information System (GIS). In addition, the ecological value map was developed employing Satoyama Index as an indicator for agricultural landscape heterogeneity, which was then overlaid with the maps of landscape values to identify spatial distribution of hotspots of social-ecological production landscapes. Our analysis identified that hotspots existed across the study area, especially in coastal plains of suburban areas where diverse land use with multiple landscape values were observed. We concluded the paper by discussing the limitations and potential managerial implications of hotspots mapping of social-ecological production landscapes for sustainable landscape management.
利根川水系鬼怒川中流域におけるアユの放流がカワウの採食分布に与える影響
Japanese Journal of Ornithology, 2006
The foraging distribution of Great Cormorants Phalacrocorax carbo was surveyed 19 times within a 46 km range along the Kinu River from March to August, 2005. During this period, the river was stocked, for angling, with Sweetfish Plecoglossus altivelis 26 times at 16 sites (total weight 2,417 kg). We assumed that released fish were vulnerable to cormorant predation due to their gregariousness for six days after the stocking. The number of cormorants found during each survey was not correlated with the amount of fish assumed to be vulnerable, and decreased sharply in late April, when Sweetfish seemed plentiful. The ratio of the number of cormorants foraging within 500 m of release sites to that in the study area was larger during the pre-stocking period than during the vulnerable period, contrary to expectation. Furthermore, no cormorants were found foraging around release sites during the vulnerable period at 12 of the 15 sites monitored. These results suggest that mass-stocking with Sweetfish did not affect the number of cormorants in the study area nor the number of foraging cormorants around the release sites.