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The use of social Stegodyphus spider retreats as nest-lining by pale chanting-goshawks (Melierax canorus): is it about preference?

The use of social Stegodyphus spider retreats as nest-lining by pale chanting-goshawks (Melierax... The pale chanting-goshawk (Melierax canorus) incorporates silk nests (hereafter ‘retreats’) of the social spider Stegodyphus dumicola (Araneae: Eresidae) in the construction of the nest-lining of their own nests. This study investigates whether pale chanting-goshawks in the Little Karoo, South Africa, show a preference for spider retreats as nest-lining and how this preference impacts on the abundance and distribution of Stegodyphus retreats within chanting-goshawk territories. In spite of an average 37 retreats per 2.2 km2pale chanting-goshawk territory, the birds selected few spider retreats (18 % of those provided during experimental manipulations). The highest proportion of spider retreats (38 %) were found within 223 m of chanting-goshawk nests, probably being moved there over time by nesting birds. Given a choice between sheepskin, active spider retreats, cushion stuffing and cotton waste, the birds preferred sheepskin (53 % by volume) although sheep are not farmed in the study area. These findings demonstrate that the pale chanting-goshawks were searching for soft insulating material to line the nest rather than spider retreats per se. Although spider retreats were used less often than other man-introduced materials, e.g. cattle dung and fabric, it is still not known how the availability of these alternative materials influence long-term trends in the use of Stegodyphus retreats by these birds. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png African Zoology Taylor & Francis

The use of social Stegodyphus spider retreats as nest-lining by pale chanting-goshawks (Melierax canorus): is it about preference?

Crouch, Tanza E.; Malan, Gerard
African Zoology , Volume 37 (1): 6 – Apr 1, 2002
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The use of social Stegodyphus spider retreats as nest-lining by pale chanting-goshawks (Melierax canorus): is it about preference?

Abstract

The pale chanting-goshawk (Melierax canorus) incorporates silk nests (hereafter ‘retreats’) of the social spider Stegodyphus dumicola (Araneae: Eresidae) in the construction of the nest-lining of their own nests. This study investigates whether pale chanting-goshawks in the Little Karoo, South Africa, show a preference for spider retreats as nest-lining and how this preference impacts on the abundance and distribution of Stegodyphus retreats within chanting-goshawk territories. In...
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Publisher
Taylor & Francis
Copyright
© Zoological Society of Southern Africa
ISSN
2224-073X
eISSN
1562-7020
DOI
10.1080/15627020.2002.11657156
Publisher site
See Article on Publisher Site

Abstract

The pale chanting-goshawk (Melierax canorus) incorporates silk nests (hereafter ‘retreats’) of the social spider Stegodyphus dumicola (Araneae: Eresidae) in the construction of the nest-lining of their own nests. This study investigates whether pale chanting-goshawks in the Little Karoo, South Africa, show a preference for spider retreats as nest-lining and how this preference impacts on the abundance and distribution of Stegodyphus retreats within chanting-goshawk territories. In spite of an average 37 retreats per 2.2 km2pale chanting-goshawk territory, the birds selected few spider retreats (18 % of those provided during experimental manipulations). The highest proportion of spider retreats (38 %) were found within 223 m of chanting-goshawk nests, probably being moved there over time by nesting birds. Given a choice between sheepskin, active spider retreats, cushion stuffing and cotton waste, the birds preferred sheepskin (53 % by volume) although sheep are not farmed in the study area. These findings demonstrate that the pale chanting-goshawks were searching for soft insulating material to line the nest rather than spider retreats per se. Although spider retreats were used less often than other man-introduced materials, e.g. cattle dung and fabric, it is still not known how the availability of these alternative materials influence long-term trends in the use of Stegodyphus retreats by these birds.

Journal

African Zoology – Taylor & Francis

Published: Apr 1, 2002

Keywords: nest building; spider nest density

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