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核心期刊论文目录 |
青海海北高寒草甸黄嘴朱顶雀亲鸟递食率 |
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| 出 版 社:动物学研究24(2):137-139 |
| 发表时间:2003 |
| 台 站:
海北高寒草甸生态系统定位研究站
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| 作 者:赵亮 刘泽华 张晓爱 易现峰 李明才 |
| 点 击 率:6477 |
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| 关 键 字:关键词:黄嘴朱顶雀;育幼行为;递食率 |
| 摘 要: 摘要:中国科学院海北高寒草甸生态系统定位站的黄嘴朱顶雀(Acanthisflavirostris)雌雄亲鸟的育幼行为数据收集于1999~2001年的3个繁殖季节(5~8月)。观察使用了一个闭路电视系统,包括放在鸟巢附近5~10 处的摄像头和35~40m外的监视器。数据分析表明:亲鸟的递食率无年间变化;雌、雄鸟递食率没有差异;总递食率不随雏鸟日龄和日间不同时段改变,但雌鸟在傍晚以前的递食率低于雄鸟并在傍晚高于雄鸟。在雏鸟6日龄前,雌鸟总递食率低于雄鸟,且二者逐步逼近,然后稳定在同一水平。此种性别差异与雌鸟在递食以外所承担的,为雏鸟保温、遮阳以及清除雏鸟粪便等事务有关。这些结果与单配制鸟类亲本投资理论一致。 |
| 关 键 字(英文):Keywords:Twite;Parentscare;Feedingrates |
| 摘 要(英文): Abstract:DataonparentalfeedingratesofTwiteAcanthisflavirostriswerecollectedatHaibeiAlpineMeadowEco logicalSystemStation,theChineseAcademyofSciencesin3breedingseasons(May August)inaperiodfrom1999to2001.Usingaclosed circuittelevisionsystem,whichincludedacameranearbythenestandamonitor35-40mawayfromthenest,thefeedingcourseswereseen.Therewerenodifferencesinthefeedingratesamongtheyears,andalsonodifferencebetweenmaleandfemaleparents.Thetotalfeedingrateofparentsdidnotchangewiththeageofnestlings,andwithtimeofday,buttherateofmaleswashigherthanthatoffemalesbeforetwilight,andreversedduringtwilight.Therateofmaleswashigherthanthatoffemalesbefore6daysofnestlings age,andthentheratesclosedtothesamelev el.Thosesexualdifferencescanberelatedtothedifferentiationofrolesinrearingnestlingsexceptthefeeding:femaleswereexclusivelyinchargeofkeepingwarmforandshelteringnestlingsfromstrongsunlight,andremovingfecesofnestlingsfromnests.Thoseresultswereinkeepingwiththetheoryofparentalinvestmentinmonogamousavian. |
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