Mating Systems, Sexual Dimorphism, and the Role of Male North American Passerine Birds in the Nesting Cycle

Verner, Jared; Willson, Mary F.

doi:10.2307/40166683

Cited by 146 publications

(81 citation statements)

References 419 publications

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“…Males came at the nest sometimes, stayed around but never fed females on the nest, in contrast to observations on Mourning Warblers (Cox 1960;Verner et Willson 1969).…”

Section: Diurnal Activitycontrasting

confidence: 39%

“…Specifics objectives were 1) to document the breeding behavior and implication of both sexes in parental care; and 2) to determine if song patterns of paired and unpaired males differed and could be used to determine breeding status. We predicted that paired males would sang less often than unpaired males (Hayes et al 1986;Hennin et al 2009) and that the breeding behavior and parental care will be similar to those of other Oporornis species, like the Mourning (Oporornis Philadelphia) and MacGillivray's warblers (Oporornis tolmiei) (Verner et Willson 1969;Pitochelli 1993;Pitochelli 1995) as well as to those of other Connecticut…”

Section: This Research Was Done To Evaluate If This Management Would mentioning

confidence: 99%

“…Parents need to defend brood and sanitize their young as well as forage for them. The frequency of these behaviors may vary between sexes (Verner et Willson 1969;Pechacek et al 2005;Barba et al 2009;Mitrus et al 2010). For maies, reproductive efforts begin with singing activities to attract mates and defend territories (Gil et Gahr 2002).…”

Section: Introductionmentioning

confidence: 99%

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Biologie de la reproduction de la Paruline à gorge grise (Oporornis agilis) dans les pinèdes grises du Lac-Saint-Jean, Canada /

Saulnier¹

2011

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Les analyses ont démontré que les mâles en couple chantent moins que les mâles seuls. Les célibataires ont un patron de chant très régulier en pleine période de reproduction où les autres mâles (en couple) réalisent d'autres tâches en lien avec la nidification. Ceux qui se reproduisent, ont de quatre à cinq oeufs par nid qui sont incubés par la femelle uniquement, et ce pendant 11 jours. Après l'éclosion, les deux parents s'occupent des soins apportés aux jeunes (nourriture, sac fécal, thermorégulation), mais la nuit, il n'y a que la femelle qui les couve. Les jeunes quittent le nid vers huit jours. L'activité principale de la femelle est de couver les jeunes et celle du mâle est de chercher de la nourriture (hors du nid). Cela change pour la femelle à mesure que les jeunes grandissent, elle a moins besoin de réchauffer les jeunes et s'implique plus dans la recherche de nourriture. Les jeunes semblent être en mesure de réguler seul leur température corporelle vers l'âge de sept jours.Les deux adultes visitent le nid à un taux similaire et celui-ci augmente en même temps que les jeunes vieillissent, car ils ont besoin de plus en plus de nourriture. Les mâles retirent beaucoup plus de sacs fécaux que les femelles et le nombre de sacs augmentent avec l'âge des jeunes, puisqu'ils mangent davantage. Les adultes ingurgitent les sacs fécaux surtout lorsque les oisillons sont jeunes et les transportent de plus en plus à mesure qu'ils grandissent.Pour le second sous-objectif, nous avons utilisé des microsatellites créés pour deux autres espèces et qui amplifiaient également avec des oiseaux du genre Oporornis. Cinq loci ont n été utilisé pour déterminer l'affiliation parentale malgré le fait que l'équilibre d'HardyWeinberg n'était pas rencontré (sans doute en raison du faible échantillonnage). Une étude plus approfondie avec davantage d'échantillons et en ciblant d'autres loci permettrait de réaliser plus efficacement l'affiliation parentale. Néanmoins, avec 5 loci et seulement 3 nids testés nos résultats suggèrent que les pères sociaux étaient également les géniteurs. Ce qui signifie qu'aucune copulation extra-couple ayant donnée un jeune n'a été reconnue pour ces nids. Pour ce qui est de la détermination du sexe des individus, nous avons utilisé une technique connue, mais non évaluée sur la Paruline à gorge grise jusqu'à ce jour et démontré que cette méthode fonctionne avec cette espèce. ni REMERCIEMENTS

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“…Males came at the nest sometimes, stayed around but never fed females on the nest, in contrast to observations on Mourning Warblers (Cox 1960;Verner et Willson 1969).…”

Section: Diurnal Activitycontrasting

confidence: 39%

Section: This Research Was Done To Evaluate If This Management Would mentioning

confidence: 99%

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Biologie de la reproduction de la Paruline à gorge grise (Oporornis agilis) dans les pinèdes grises du Lac-Saint-Jean, Canada /

Saulnier¹

2011

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“…This alternative is unlikely because other tests show that plumage brightness increases rather than decreases with greater darkness (Marchetti 1993). (2) Male coloration varies with extent of paternal care at the nest (Verner and Willson 1969;Baker and Parker 1979;Slagsvold et al 1995) and nest height influences life history traits such as clutch size or fecundity (Martin 1988(Martin , 1995, which in turn can influence paternal care. Thus, male coloration may vary among nest heights related to the need for paternal care.…”

Section: Discussionmentioning

confidence: 99%

Sexual Dichromatism in Birds: Importance of Nest Predation and Nest Location for Females Versus Males

1996

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Abstract.-Examinations of variation in plumage dichromatism in birds have focused on male plumage brightness and largely neglected variation in female plumage brightness. Nest predation previously was concluded to constrain male brightness and thereby reduce dimorphism in ground-nesting birds based on an incorrect assumption that nest predation is greater for ground nests. Correlations of plumage brightness and dichromatism with nest predation have never been tested directly and we do so here with data for warblers (Parulinae) and finches (Carduelinae). We show that male plumage brightness varies among nest heights, but in a pattern that is not correlated with nest predation. Female plumage brightness also varies among nest heights, but in a pattern that differs from males, and one in which variation in female plumage brightness was negatively correlated with nest predation. These results suggest that nest predation may place greater constraints on female than male plumage brightness, at least in taxa where only females incubate eggs and brood young. These results also show that female plumage patterns vary at least partly independently of male patterns and emphasize the need to include consideration of both female and male plumage variation in tests of plumage dimorphism. Plumage dimorphism differs between ground and off-ground nesters as previously described and, if anything, the relationship between plumage dimorphism and nest predation was positive rather than negative as previously argued.

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“…a substantially greater proportion of North American species, at least among passerines. are polygamous (Verner & Willson 1969). As a result, the phenomenon has drawn considerable attention in North America, where a model for the evolution of polygyny in birds was developed by Verner & Willson (1966) and Orians (1969).…”

Section: Polygamous Mating Systemsmentioning

confidence: 99%

Long‐term bird population studies in the United States

O’Connor¹

1991

Ibis

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Long‐term population studies of birds in the United States have been less species‐oriented and more concept‐oriented than in Britain. The demographics of North American species do not differ grossly from those of species elsewhere in the world, but polygamy has been relatively more frequently studied in U.S. species than elsewhere. Subjects that have been particularly explored in long‐term studies in the United States include the determinants of cooperative breeding in birds, the effects of the spatial scale on what is learned, and correlates of regional and national declines in bird populations. Other areas of developing interest include the potential uses of monitoring data, the relative value of longitudinal and cross‐sectional studies in analysing slow processes, and the significance of episodic events in shaping population patterns.

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Mating Systems, Sexual Dimorphism, and the Role of Male North American Passerine Birds in the Nesting Cycle

Cited by 146 publications

References 419 publications

Biologie de la reproduction de la Paruline à gorge grise (Oporornis agilis) dans les pinèdes grises du Lac-Saint-Jean, Canada /

Biologie de la reproduction de la Paruline à gorge grise (Oporornis agilis) dans les pinèdes grises du Lac-Saint-Jean, Canada /

Sexual Dichromatism in Birds: Importance of Nest Predation and Nest Location for Females Versus Males

Long‐term bird population studies in the United States

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