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朱鹮( Nipponia nippon ) 总被引:3,自引:0,他引:3
朱鹮(Nipponia nippon),又名红鹤、朱鹭,属鹳形目(鸟)科,体型比白鹭略大,嘴长而下弯.通体白色,头顶具冠羽,脸朱红色,腿绯红,颈后饰羽长.繁殖期头、颈、背部深灰色.从空中飞过时,下体及两翼呈淡朱红色,故名朱(鸟). 相似文献
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ABSTRACT. Many birds undergo bare part color changes during the breeding season. Most investigators have focused on color as a signal of individual quality. An alternative, but not exclusive, function of bare part color may be signaling readiness to breed, especially in colonial, asynchronous breeders. White Ibises ( Eudocimus albus ) are colonial waterbirds that show vivid bare part colors on their bills and legs during reproduction. We quantified bill and leg colors to describe color changes and their possible relationship to reproductive status during the breeding season of White Ibises in the Florida Everglades from 1998 to 2001. We also examined the correlation between bare part colors and circulating concentrations of sex steroids to understand the factors that regulate bare part colors. During the display stage, male and female ibises developed dark pink bills and scarlet legs. As the breeding season progressed, bills and legs faded and developed a muted pink hue. The bare part colors of female ibises were correlated with testosterone concentrations, but those of male ibises were not correlated with any hormones. A discriminant function analysis based on principal component scores (representing variation in saturation and hue) and the amount of black on the bill successfully classified ibis reproductive stage 94% of the time. The use of bare part colors to determine reproductive status may be useful for studying reproduction in colonially nesting birds, where access to breeding sites can be difficult and potential for researcher disturbance is high. 相似文献
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朱鹮冬季觅食地的选择 总被引:24,自引:1,他引:24
在无线电遥测的基础上 ,采用样方法对朱冬季觅食地进行了调查。朱冬季觅食地有冬水田、河流浅滩和水库 3种类型。成鸟与幼鸟的主要觅食地类型及分布有明显的差别 ,位于海拔 6 0 0~ 10 0 0m的低山区冬水田是朱成鸟冬季最重要的觅食地 ,幼鸟多在汉江流域的河流及浅滩中觅食。对冬水田的主要栖息地特征的方差分析和因子分析的结果表明 :影响朱冬季觅食地选择的主要因子为觅食地的海拔高度、开阔度、面积及人类活动的干扰程度等。冬水田的恢复及保护对朱的保护有着重要的意义 相似文献
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《Ostrich》2013,84(3-4):215-216
Die Ibisse der Gattung Geronticus zeigen ökologische und ethologische Merkmale, die sie klar von anderen Milgliedern der Familie Threskiornithidae unlerscheiden. Um zu überprüfen, ob diese Gemeinsamkeiten auch durch eine enge phylogenetische Verwandtschaft reflektiert werden, haben wir zwei Abschnitte der mitochondrialen DNS sequenziert. In einem 307 bp Segment des Cytochrom b-Gens traten zwischen den beiden Arten nur zwei Basensubstitutionen auf. Beide sind Transitionen an dritter Codonposition und haben keinen Einfluss auf die Aminosäure-sequenz des Proteins. Im untersuchten 16S rDNS-Segment stellten wir sech Transitionen fest. Dieser starke Hinweis auf eine nahe Verwandtschaft könnte sich in Zukunftauch für den Schutz dieser bedrohten Vögel als nützlich erweisen. 相似文献
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野生朱鹮保护研究进展 总被引:5,自引:0,他引:5
朱鹳是世界濒危鸟类,国家Ⅰ级重点保护动物,现仅分布于中国陕西省洋县及其邻近地区。我国自1981年重新发现野生朱鹮以来,保护工作取得显著成就,野生种群数量已从7只增长到约600只。综述了25年来我国朱鹮保护工作的主要内容以及近年取得的成绩和研究进展,包括栖息地保护、野生种群监测和再引入等;指出了当前我国朱鹮保护面临的问题和亟待开展的工作;为朱鹮的保护管理提供了科学建议。 相似文献
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环境因子对笼养朱鹮自然繁殖的影响 总被引:1,自引:0,他引:1
2004年3~7月,在陕西省洋县对人工饲养条件下朱鹮(Nipponia nippon)的自然繁殖进行了研究。18对繁殖鸟的窝卵数平均为(3.10±0.54)枚,孵化率26.2%,育雏成功率64.7%。当笼舍面积低于某一阈值时,窝卵数与笼舍面积呈明显正相关(Pearson,r=0.591,P<0.01)。出壳数、出飞数均与巢距遮荫树的距离呈负相关(Pearson,r1=-0.674,P1<0.05;r2=-0.677,P2<0.05)。亲鸟的繁殖经验对繁殖成功率没有显著影响,营巢环境是影响自然繁殖成功率的重要因素。 相似文献
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Ecker DJ Sampath R Massire C Blyn LB Hall TA Eshoo MW Hofstadler SA 《Nature reviews. Microbiology》2008,6(7):553-558
We describe a new technology, the Ibis T5000, for the identification of pathogens in clinical and environmental samples. The Ibis T5000 couples nucleic acid amplification to high-performance electrospray ionization mass spectrometry and base-composition analysis. The system enables the identification and quantification of a broad set of pathogens, including all known bacteria, all major groups of pathogenic fungi and the major families of viruses that cause disease in humans and animals, along with the detection of virulence factors and antibiotic resistance markers. 相似文献