关键词: 犬蝠, 棕果蝠, 食性, 西双版纳

Abstract: Cynopterus sphinx and Rousettus leschenaulti are two species of abundant and widely distributed pteropodid bats in Xishuangbanna, Southwest China. Both are frugivorous and frequently found coexisting in the same areas. Diet of C. sphinx and R. leschenaulti were studied from the beginning of June, 2004 to the end of December, 2004 in Xishuangbanna using field survey, gleaning, feces analysing and seed germination. We also used mist net to catch bats around their feeding roosts in order to identify species of bats and obtain fecal samples to identify food item they fed on. We found fruits of 18 plant species of 11 families and leaves of 2 plant species of 2 families were used by C. sphinx and fruits of 12 plant species of 9 families and leaf of 1 plant species of 1 families were used by R. leschenaultia. They mainly fed on fruits and only leaves of 2 plant species were found. These two species were sympatric and dietary overlap between them was relatively high in rain season (June－ October), and 65% of the plant species recorded were used by these two species of bats in this season. In dry season (November－December), R. leschenaulti exploiteded food resources in other areas to avoid to competed with C. sphinx as quantity and species of food decreased.

Key words: Cynopterus sphinx, Rousettus leschenaulti, diet, Xishuangbanna