Winter pairs of ruddy shelducks at Lashihai Lake, southwest China | |
Ruichang QUAN ; Liangwei CUI | |
刊名 | Integrative Zoology |
2013 | |
卷号 | 8期号:s1页码:46-49 |
关键词 | conflict cost and benefit migratory ducks sex ratio time budget |
中文摘要 | It has been suggested that pairing behavior during winter in migratory ducks represents a trade-off between costs (defense of the female) and benefits (early access to females). To investigate the benefits and costs for both sexes in wintering pairs of ruddy shelducks (Tadorna ferruginea), we compared time budgets for paired males and females, and surveyed the sex ratio of the birds wintering at Lashihai Lake, southwest China. The behavior of the paired ruddy shelducks was monitored for 5 activity types: feeding, resting (including sleeping), preening, drinking and warning. Feeding was the most dominant activity. The feeding time of both sexes increased as the winter season progressed. However, the paired females always spent significantly more time feeding and less time warning than the paired males. Paired ruddy shelducks had access to better feeding grounds than unpaired individuals, resulting in a food benefit for paired individuals over single individuals. Because the sex ratio of the wintering population was strongly male biased (M:F = 1.44:1.00), the paired male also gained the benefit of accessing a female in advance of the breeding season. |
公开日期 | 2013-06-17 |
内容类型 | 期刊论文 |
源URL | [http://ir.xtbg.org.cn/handle/353005/4519] |
专题 | 西双版纳热带植物园_2012年后新成立研究组 |
推荐引用方式 GB/T 7714 | Ruichang QUAN,Liangwei CUI. Winter pairs of ruddy shelducks at Lashihai Lake, southwest China[J]. Integrative Zoology,2013,8(s1):46-49. |
APA | Ruichang QUAN,&Liangwei CUI.(2013).Winter pairs of ruddy shelducks at Lashihai Lake, southwest China.Integrative Zoology,8(s1),46-49. |
MLA | Ruichang QUAN,et al."Winter pairs of ruddy shelducks at Lashihai Lake, southwest China".Integrative Zoology 8.s1(2013):46-49. |
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