黄腹山鹪莺成鸟的秋季换羽

黄腹山鹪莺(Prinia flaviventris)具有冬羽尾羽长于繁殖羽尾羽的特点,可能意味着一种新的生存和繁殖策略。为此,从2006年9月～2007年2月,在广东省肇庆市江溪村对黄腹山鹪莺的秋季换羽进行研究。结果显示:(1)黄腹山鹪莺成鸟繁殖羽体长和尾羽长皆极显著短于冬羽(P<0.01),繁殖羽翼长显著短于冬羽(P<0.05),其余身体量度的差异均不显著(P>0.05)。(2)9月17日获得第一个黄腹山鹪莺换羽个体,初级飞羽已更换到P5,次级飞羽已更换到S6,11月20日后所获样本均已完成羽毛的更换。(3)初级飞羽的换羽模式为递降换羽,次级飞羽为递升换羽,尾羽为离心型换羽。(4)换羽期间,10月的个体平均体重最大,显著(P<0.01)重于11月的体重,其他各月无显著性差异(P>0.05)。据此,推测黄腹山鹪莺秋季种群换羽的持续时间约100d;相对其他羽毛而言,尾羽更换对黄腹山鹪莺生长发育的影响更为明显。

Autumn Moulting of the Adults of Yellow-bellied Prinia,Prinia flaviventris

Tail of Yellow-bellied Prinia in winter is longer than in breeding season that may means a new survival and breeding strategy.So we studied autumn moulting of the adults of Yellow-bellied Prinia at Jiangxi village,Zhaoqing city,Guangdong from September 2006 to February 2007.The results showed that:(1)The length of the body and tail in breeding season was highly significant(P<0.01)shorter than non-breeding season,the length of wing was significant shorter(P<0.05),other body measurements had not significant difference between breeding and non-breeding season(P>0.05).(2)The specimen of Yellow-bellied Prinia got at 15th September showed that 5th primaries and 6th secondaries had been replaced,while the specimens collected after 20th November had finished the moult process.(3)The pattern of primaries replacement was descendant and Secondaries was ascendant,and tail feathers replaced as a centrifugal moulting pattern.(4)Body-mass varied during moulting periods and reached its maximum in October when the body mass was significantly heavier than November(P<0.01).However,no any significant difference in body mass was found between the remainder months(P>0.05).Hence,we supposed that:Autumn moulting of Yellow-bellied Prinia would take about 100 days and the tail replacement had more important effect than other feathers on the growth of Yellow-bellied Prinia.