崇明东滩斑背大尾莺繁殖生态分析

为了揭示斑背大尾莺(Locustella pryeri)不同地理种群间繁殖生态是否会出现分化,于2010年、2011年4—6月在崇明东滩(东经121°9’30″～121°54’00″,北纬31°27’00″～31°51’15″)对斑背大尾莺的繁殖生态进行了系统的野外观察。结果表明:崇明东滩地区斑背大尾莺的巢型有两种,即浅杯状无盖巢和椭圆状有盖巢;产卵期3～6 d;孵化期10～12 d;育雏期14 d左右。其中:巢内育雏9～10 d(平均值=(9.18±0.41)d,n=11巢);巢外育雏4～5 d(平均值=(4.75±0.45)d,n=11巢)。斑背大尾莺的孵化率为53.85%(42/78),离巢率为80.28%(57/71),卵成功率为37.18%(29/78),将其与扎龙、双台河口两地斑背大尾莺的繁殖生态进行比较,发现3者在繁殖生态方面有一定差异。

Breeding Ecology of Japanese Swamp Warbler in Chongming Dongtan Wetland

An observation was made on breeding ecology of Japanese Marsh Warbler(Locustella pryeri) in Chongming Dongtan National Nature Reserve from 2010 to 2011 to study the ecological differentiation of L.pryeri in different regions of China.Results show that there are two types of nests of L.pryeri in Chongming Dongtan—tazza-shaped nests with open entrance or narrow entrance.The egg-laying period lasts 3-6 days,and the incubation lasts 10-12 days,with a hatching success of 53.85 percent(42/78).The brood time for L.pryeri lasts about 14 days,among which brooding in the nest lasts 9-10 days(the average is(9.18±0.41) days for 11 nests),and brooding outside the nest lasts 4-5 days(the average is(4.75±0.45) days for 11 nests),resulting in a fledgling success rate of 80.28 percent(57/71).Total reproductive success is 37.18 percent(29/78).There are great differences in breeding ecology between the populations in Chongming Dongtan and the populations in Zhalong and Shuangtai Hekou.