Moult speed predicts pairing success in male harlequin ducks

Robertson, Gregory J.; Cooke, Fred; Goudie, R. Ian; Boyd, W. Sean

doi:10.1006/anbe.1997.0724

Cited by 28 publications

(7 citation statements)

References 36 publications

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“…Roulin, 2007). In the case of males, this trade‐off may mean that males proficient in moulting and simultaneously mounting an immune response will maintain attractive plumage (Hill & Montgomerie, 1994; Robertson et al. , 1998; Senar et al.…”

Section: Discussionmentioning

confidence: 99%

Experimental test of a trade‐off between moult and immune response in house sparrows Passer domesticus

Moreno‐Rueda

2010

J of Evolutionary Biology

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A trade‐off between immune system and moulting is predicted in birds, given that both functions compete for resources. However, it is unclear whether such a trade‐off exists during post‐breeding moult. This study tests such a trade‐off in the house sparrow (Passer domesticus). Males injected with an antigen (lipopolysaccharide) significantly moulted slower than sham‐injected males. Moreover, males whose seventh primaries were plucked to simulate moult showed smaller immune response to phytohaemagglutinin than control males, in which seventh primaries were clipped. A trade‐off between moult speed and body mass was also found. The results show a clear trade‐off between moult and immune response in the house sparrow: immune response negatively affected moult and moult negatively affected immune response. These findings suggest that only individuals in good condition may have an efficient moult and simultaneously respond effectively in terms of immunity to pathogens, which could explain how plumage traits honestly indicate parasite resistance in birds.

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Section: Discussionmentioning

confidence: 99%

Experimental test of a trade‐off between moult and immune response in house sparrows Passer domesticus

Moreno‐Rueda

2010

J of Evolutionary Biology

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“…The probability of return may be related to a bird's pair status. Because of the male biased sex-ratio, there were always several unpaired adult males in our population, but we had no evidence of unpaired adult females (Robertson et al 1998a). There were also several birds whose pairing status was unknown to us.…”

Section: Data Analysesmentioning

confidence: 91%

Survival, Emigration, and Winter Population Structure of Harlequin Ducks

Cooke

Robertson

Smith

et al. 2000

Condor

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JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org. University of California Press and Cooper Ornithological Society are collaborating with JSTOR to digitize, preserve and extend access to The Condor. Abstract. A population of individually marked Harlequin Ducks (Histrionicus histrion-icus) at White Rock, British Columbia, Canada was examined to measure the degree of population differentiation among birds which pair during the winter months. This required an understanding of the patterns of emigration among wintering sites in different segments of the population. Some juveniles arrived at the wintering grounds accompanied by their mothers, thus initially arriving into the same winter population as their parents. Young males were more likely than young females to disperse during the first two years of life. Adult males had higher local survival than adult females during the summer months, probably because of the greater mortality risks to nesting females. During the nonbreeding seasons, local survival was the same in both sexes. Paired males had a local survival of more than 90%, suggesting both high survival and strong philopatry. Unpaired males had a lower local survival rate, suggesting they have higher mortality and/or emigration rates. Young females had the same local survival rate as adult females, suggesting that they did not disperse during the winter. These winter philopatry patterns are similar to the general pattern of breeding philopatry in waterfowl, with females showing stronger philopatry than males, and paired adults stronger philopatry than unpaired and young birds. The dispersal of young males makes local population differentiation unlikely in this species.

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“…Because of the male biased sex-ratio, there were always several unpaired adult males in our population, but we had no evidence of unpaired adult females (Robertson et al 1998a). There were also several birds whose pairing status was unknown to us.…”

Section: Data Analysesmentioning

confidence: 91%

Survival, Emigration, and Winter Population Structure of Harlequin Ducks

Cooke¹,

Robertson²,

Smith³

et al. 2000

The Condor

Self Cite

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JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org. icus) at White Rock, British Columbia, Canada was examined to measure the degree of population differentiation among birds which pair during the winter months. This required an understanding of the patterns of emigration among wintering sites in different segments of the population. Some juveniles arrived at the wintering grounds accompanied by their mothers, thus initially arriving into the same winter population as their parents. Young males were more likely than young females to disperse during the first two years of life. Adult males had higher local survival than adult females during the summer months, probably because of the greater mortality risks to nesting females. During the nonbreeding seasons, local survival was the same in both sexes. Paired males had a local survival of more than 90%, suggesting both high survival and strong philopatry. Unpaired males had a lower local survival rate, suggesting they have higher mortality and/or emigration rates. Young females had the same local survival rate as adult females, suggesting that they did not disperse during the winter. These winter philopatry patterns are similar to the general pattern of breeding philopatry in waterfowl, with females showing stronger philopatry than males, and paired adults stronger philopatry than unpaired and young birds. The dispersal of young males makes local population differentiation unlikely in this species. University of California Press and

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Moult speed predicts pairing success in male harlequin ducks

Cited by 28 publications

References 36 publications

Experimental test of a trade‐off between moult and immune response in house sparrows Passer domesticus

Experimental test of a trade‐off between moult and immune response in house sparrows Passer domesticus

Survival, Emigration, and Winter Population Structure of Harlequin Ducks

Survival, Emigration, and Winter Population Structure of Harlequin Ducks

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