@article{oai:repository.naro.go.jp:00002273,
 author = {外山, 晶敏 and TOYAMA, Masatoshi and 三代, 浩二 and MISHIRO, Koji and 井原, 史雄 and IHARA, Fumio},
 journal = {果樹研究所研究報告, Bulletin of the National Institute of Fruit Tree Science},
 month = {Mar},
 note = {Sticky traps baited with the synthetic P. stali aggregation pheromone can lure and catch P. stali nymphs. If individuals with poor nutritional status than well-fed individuals in nymphs as well as in adults are more susceptible to the pheromone, monitoring nymphs caught by the trap might provide a simple method for assessing the food resource conditions of their forest habitat. However, the relationships between nutritional status and sensitivity to the pheromone have not yet been experimentally determined for nymphs. Therefore, we identified a morphological indicator of nutritional status for P. stali nymphs in order to assess the nutritional status of nymphs attracted to the synthetic P. stali aggregation pheromone. We first assessed several morphological characters in the fourth instar using nymphs that were extremely varied in nutritional status. Both body length at the longest point (BL) and body width at the widest point (BW) varied among them. On the other hand, the distance from the top of the right eye to the top of the left eye (EYES) was constant throughout the instar period, and thus, was regarded as a good estimator of fundamental body size. Based on these results, we propose the product of BL and BW (BODY) relative to EYES as the indicator. Next, we measured this indicator under several feeding treatments for individual instars, drawing regression lines for BODY versus EYES in each case. A comparison of indicator characters with the regression lines produced in this study allows us to estimate the food intake and nutritional status of a large number of nymphs captured in the field., チャバネアオカメムシ幼虫について, 野外で採集した多数個体の栄養状態を, 形態形質から簡便に推定する手法を確立するため，まず栄養状態が著しく異なる4齢幼虫を用いて, 栄養状態によりサイズが変化する形態形質と, 脱皮以降ほとんど変化しない形態形質について検討した. 結果, 採餌量に応じて変化する形質として体長 (BL) と体幅 (BW), 変化しない形質として眼間長 (EYES) が選抜され， EYES に対する BL と BW の積 (BODY)の相対的サイズにより, 採餌量, さらに個体の栄養状態の推定が可能と考えられた. そこで, 2～5齢の各齢について, これらの形質を5つの異なる栄養状態にあるグループで測定し, 状態ごとに形質間の関係を直線回帰により求めた. 野外採集虫を, これら回帰直線とともに BODY-EYES グラフに図示することにより, サイズの分布パターンや回帰直線との比較から, 栄養状態を集団レベルで評価する方法を提示した.},
 pages = {23--32},
 title = {チャバネアオカメムシ幼虫の栄養状態を推定する形態指標},
 volume = {19},
 year = {2015},
 yomi = {トヤマ, マサトシ and ミシロ, コウジ and イハラ, フミオ}
}