REPRODUCTIVE FAILURE AND NEST SITE SELECTION OF 2 ESTRILDID FINCHES IN ACACIA WOODLAND

被引：8

作者：

BARNARD, P

MARKUS, MB

机构：

[1] Department of Zoology, University of the Witwatersrand, Johannesburg

[2] Department of Zoology, University of Namibia, Windhoek

来源：

OSTRICH | 1990年 / 61卷 / 3-4期

关键词：

D O I：

10.1080/00306525.1990.9634159

中图分类号：

Q95 [动物学];

学科分类号：

071002 ;

摘要：

Reproductive output of Blue Waxbills Uraeginthus angolensis (BWs) and Melba Finches Pytilia melba (MFs) was extremely low in the central Transvaal, South Africa, despite strict measures to limit observer disturbance. Eggs were laid in 57-61% of nests built in 1985, and 20-25% of nests in 1986. Between 0% and 20% of nests with eggs were successful, and 0-25% of individual eggs resulted in fledged young. Predation, nest desertion and storm damage accounted for most failures. A substantial proportion of nests failed before they were visited, indicating a high rate of natural failure, and the number of nest visits did not appear to influence nest outcome. Both BWs and MFs chose well-protected, camouflaged sites, especially in the tree Acacia tortilis. However, neither dense thorns nor dense foliage, nor the presence of commensal wasps (Polistes and Ropalidia), safeguarded nests from failure.

引用

页码：117 / 124

页数：8

共 26 条

[1] Anderson W.L., Storer R.W., Factors influencing Kirtland’s Warbler nesting success, Jack-Pine Warbler, 54, pp. 105-115, (1976)
[2] Brower J.E., Zar J.H., Field and Laboratory Methods for General Ecology, (1977)
[3] Craig A.J.F.K., Breeding success of a Red Bishop colony, Ostrich, 53, pp. 182-188, (1982)
[4] Earle R.A., Breeding biology of the Red-breasted Swallow Hirundo semirufa, Ostrich, 60, pp. 13-21, (1989)
[5] Earle R.A., Herholdt J.J., Breeding and moult of the Anteating ChatMyrmecocichla formicívora, Ostrich, 59, pp. 155-161, (1988)
[6] Ferguson J.W.H., Ecological factors affecting social behaviour of white-browed sparrow-weavers Plocepasser mahali, University of the Witwatersrand, (1986)
[7] Frost P.G.H., The regional landscape: Nylsvley in perspective, S. Afr. Natl. Progr. Rep, 133, pp. 1-30, (1987)
[8] Gates J.E., Lysel L.W., Avian nest dispersion and fledging success in field-forest ecotones, Ecology, 59, pp. 871-883, (1978)
[9] Gottfried B.M., Thompson C.F., Experimental analysis of nest prédation in an old-field habitat, Auk, 95, pp. 304-312, (1978)
[10] Orthophotographs, 1:10 000 Series, (1981)

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