期刊论文详细信息
The condor | |
Dabbling Ducks Increase Nest Defense After Partial Clutch Loss | |
Kevin M. Ringelman1  | |
关键词: incubation; Gadwall; Mallard; nest attendance; parental investment; predation; waterfowl.; | |
DOI : 10.1525/cond.2013.120096 | |
学科分类:动物科学 | |
来源: Central Ornithology Publication Office | |
【 摘 要 】
Abstract. Predation is the primary source of mortality of dabbling duck nests, so a key aspect of parental investment is defending the nest from predators. The hen's presence on the nest is widely considered to be a good measure of nest defense; an incubating female camouflages the nest and may physically deter nest predators. Parental-investment theory suggests that investment should increase with the reproductive benefits expected from the current clutch of eggs. We used nest-temperature loggers to study how the rhythms of waterfowl incubation changed after the nest was partially destroyed by a predator. Contrary to the expected-benefits hypothesis, we found that hens significantly increased their investment after partial clutch loss: they took fewer recesses from incubation per day and extended their incubation by more than 200 min after a partial depredation. We suggest that when predators pose little risk to the incubating adult, those hens unable or unwilling to abandon a nest after partial clutch l...【 授权许可】
CC BY
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Files | Size | Format | View |
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RO201904045563545ZK.pdf | 398KB | download |