マダガスカル降雨林におけるビロードマミヤイロチョウの果実に対する選好性

DOI Web Site 被引用文献1件 参考文献28件

書誌事項

タイトル別名
  • Fruit Preference in the Velvet Asity Philepitta castanea in a Rain Forest of Madagascar
  • Fruit Preference in the Velvet Asity Ph

この論文をさがす

抄録

Feeding preference of the Velvet Asity Philepitta castanea was examined in relation to fruiting phenology and a variety of fruit characteristics(nutritive and energy contents, colour, size, weight, seed load, handling time and seed passage time) in Ranomafana rain forest, southeastern Madagascar, during the dry season (August-October). In the period when total fruit supply exceeded birds' energy requirement, fruit preference was obvious and stable, that is, fruits of Oncostemon leprosum were preferred, those of all Psychotria spp. were taken at random without preference, andthose of Saldinia sp. were avoided. But we did not find a preference among fruits, as predicted in optimal foraging theory, when total fruit supply was in short. There was no direct correspondence between the asity preference and any fruit characteristics. Assuming that frugivorous birds have a fixed criterion of fruit characteristics for selection, the fruits of Saldinia sp. might be avoided because the criteria on nutrition and/or energy were not filled (suggested by lowest values in percent of the nutri-tion assimilated, energy/handling time, and energy/pulp weight). Forag-ing the large-sized fruits of Psychotria sp.8 with some favourable proper-ties was perhaps limited by gape size. The fruits of O. leprosum may have been preferred due to the higher pulp-to-seed ratio and the shorter seed passage time resulting in higher food processing rate than Psychotria spp.

収録刊行物

被引用文献 (1)*注記

もっと見る

参考文献 (28)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ