The biology of the Yellowthroated Sandgrouse Pterocles gutturalis in a South African agricultural landscape
| Autor: | Sheila Blane, Warwick Tarboton, Penn Lloyd |
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| Rok vydání: | 1999 |
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| Zdroj: | Ostrich. 70:214-219 |
| ISSN: | 1727-947X 0030-6525 |
| DOI: | 10.1080/00306525.1999.9634239 |
| Popis: | Tarboton, W.R., Blane, S. & Lloyd, P. 1999. The biology of the Yellowthroated Sandgrouse Pterocles gutturalis in a South African agricultural landscape. Ostrich 70 (3&4): 214–219. A local population of Yellowthroated Sandgrouse was monitored from 1988–1992 at Northam, Northern Province, South Africa, a region in which this species was previously an irruptive, non-breeding visitor. Yellowthroated Sandgrouse were found to be year-round residents, foraging and nesting exclusively in areas cleared for agriculture, particularly one-year fallow lands. They ate the dry seeds of a variety of weedy plants, especially Amaranthus and Crotalaria spp. Males outnumbered females 1.35:1. Egg-laying occurred from April-October, with a peak in June. Clutch size (2–3) averaged 2.85 (n=26), and the incubation period for one nest was 26 days after clutch completion. Nesting success was estimated at 24.8% (n=19 nests, 176 nest days), and the daily nest predation rate at 2.55%; predation and ploughing accounted for most nest lo... |
| Databáze: | OpenAIRE |
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