云龙湖黄苇鳽的巢址选择与营巢研究
毕业论文关键词：黄苇鳽；巢址选择；营巢
The Nest-site Selection and Nesting of Yellow Bittern (Ixobrychus sinensis) in Yunlong Lake
Abstract: The nest-site selection and nesting are very important .They also have very important effects on the reproduction of birds. The Ixobrychus sinensis is a summer resident in Xuzhou. In order to protect and make the most of wide Yellow Bittern in Xuzhou, we researched the bird weekly around Yunlong Lake from May to June. According to the natural environment of Yunlong Lake, we collected and analyzed the parameters of nests. The results show that Ixobrychus sinensis started nesting in the rushes in mid-May. And Ixobrychus sinensis began to lay、hatch and brood their eggs in late May. Nests were weared by rushes and rushes rod . The nests were located in the middle-upper part of the rushes. Nests looked like dishes and the structure was relatively simple. The arguments of 7 nests were measured carefully. The external diameters of the nests were 19 cm ± 4 cm. And the internal diameters of the nests were 13cm ± 3cm .The depths of the nests were 4 cm ±1.5cm . The heights of the nests above the water were 137cm±23cm.This article has a discussion about the relationship between the offshore distance and the near water distance. It also has a discussion about the relationship between the inner area of nest and the clutch size.
Keywords: Yellow Bittern (Ixobrychus sinensis); the nest-site selection; nesting
目录
引言 1
1 材料与方法 2
1.1 研究工具 2
1.2 研究对象 2
1.3 研究过程与方法 2
1.4 数据处理方法 2
2 结果与分析 3
2.1 巢的位置状况 3
2.2 营巢 5
3 讨论 6
3.1 巢址的选择 6
3.2 相关性状之间的关系 7
3.3 需要进一步解决的问题 7
致谢 7
引言
鸟类的筑巢行为对鸟类的繁衍生息起着非常重要的作用。早在1985年就有人指出：在哪里营巢是鸟类繁衍过程中的一个行为决策。巢址在鸟类繁衍生存过程起着不容忽视的作用，是环境资源的总和。筑巢时如果选择较好的环境就能使鸟类在繁殖期间避免外界环境条件不利的影响[1-2]。鸟类的繁殖会受到的同类的干扰、天敌的猎食等不良因素的影响，而适合的巢址能将其不良影响降到最低，进而提高鸟类的繁殖率。选择适宜的巢址也是鸟类在长期的自然选择过程中形成的一种防御方式[3]。筑巢的效果受捕食难易程度、天气、雌性身体状况和筑巢位置等方面的影响[4]。研究鸟类巢址的选择和营巢不仅对鸟类的繁殖地的特点的了解具有重要意义，还对鸟类的保护、生长、繁衍起到重要作用。
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