鸟类对绢毛蔷薇种子的取食选择初探

Choice of the Frugivorous Birds on the Seeds of Rosa sericea

对雅鲁藏布江中游的鸟类取食蔷薇果的行为进行了初步调查，以确认食果鸟类。通过果实特征不同，判断鸟类对果实的选择。结果表明：该地区主要的食果实鸟类有5种，其中4种是食肉质鸟，是合法的种子传播者；1种是食种子鸟，是种子掠夺者。绢毛蔷薇果实在成熟后才是鸟类取食的目标，果肉多的果实是鸟类的首选。同一地点的果实，鸟类一般选择当时果实质量最好的植株取食。

The birds＇ foraging behavior on Rosa sericea fruits was studied to explore frugivorous birds in the middle reaches of the Yarlung Zangbo River. To examine behavioral mechanisms of fruits selection, the fruit characteristics were measured. Results showed that five different species of birds consume the fruits of Rosa sericea, four are legitimate seed dispersers, and one is seed predator. Frugivorous birds aim at ripe fruit and select fruits with more pulp to eat. However, at the same location, fruits of the best quality would be the first choice.