The Breeding Ecology of Oriental Great Reed Warbler (Acrocephalus orientalis) in Hongjiannao of Shaanxi Province
The breeding ecology of oriental great reed warbler ( Acrocephalus orientalis) in Hongjiannao of Shaanxi Province was studied from May to July in 2012. The results showed that the A. orientalis arrived at this breeding area in late May, and then nested on branches of reed. The cup-shaped nests were upward and consisting of wizened and feature reed. The parameters of 17 (17 out of 22) nests were measured in detail. The external and internal dimensions as well as depth of the nests were 11. 85 cm ±0. 216 cm, 5. 87 cm ±0. 101 cm and 6. 49 cm ±0. 166 cm, respectively. The nests were normally found in the lower part of reed (about 2/5) and the height above ground was 106. 00 cm ± 4. 421 cm. Additionally, the average clutch size was 4. 67 ±0. 188. The weight, length and breadth of the eggs were approximately 2. 70 g ± 0. 044 g, 21. 93 mm ±0. 13 mm and 15. 81 mm ±0. 06 mm. The incubation period was frequently between 15 ～ 18 days, and the hatchability and survival rate of A. orientalis were 78. 8% and 95. 2% . The growth curves of weight and length of nestlings were corresponding with Logistic curves. Moreover, the nest-site selection was highly depended on the height and density of reed. Foul weather and nest parasitism of Eurasian cuckoo ( Cuculus canorus) were also important factors to affect the breeding success of A. orientalis.
NETL
NSTL
万方数据
维普
