シロチョウ類(モンシロチョウ・スジグロシロチョウ)の吸蜜量測定器の作成と最適糖濃度  [in Japanese] A New Technique for Measuring Nectar Intake of Pierid Butterflies, Pieris rapae and P. melete (Lepidoptera, Pieridae), and Optimal Sugar Concentration  [in Japanese]

1. 著者らはポリプロピレン製の注射器とマイクロ・キャピラリー・チューブを用いた安価で正確な吸蜜量測定器を開発した.2. これを用いて野外環境条件下ででモンシロチョウとスジグロシロチョウの糖溶液摂取量を測定した.糖溶液の濃度は0%と0.1%, 1%, 10%, 20%, 50%とした.3. いずれのチョウにおいても20%の糖溶液が最も好まれた.また, それぞれの濃度の糖溶液の吸飲量は雌雄間で差がなかった.4. これらの結果と他種のチョウの糖溶液の選好性を比較し, チョウ類の最適糖濃度について考察した.

A new technique for measuring nectar intake in pierid butterflies is proposed. The measuring equipment is available for the field study because it is a simple and precise apparatus that is made of disposable syringe and microcapillary. Intake of sugar solution in Pieris rapae and P. melete was measured in the summer season of cool temperate zone of Japan. In both species, they preferred 20% sugar solutions among 0%, 0.1%, 1%, 10%, 20% and 50% sugar solutions. The optimal nectar concentration of the two species and that of other species were discussed.