Adoption of Chicks among Thick-Billed Murres

Gaston, A. J.; Eberl, Christine; Hipfner, Mark; Lefevre, Kara L.

doi:10.2307/4088742

Cited by 16 publications

(16 citation statements)

References 4 publications

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“…Tinbergen (1960) had already explained that adoptions in herring gulls, Larus argentatus, are the result of errors in recognition when offspring were small. Similar results on parent-offspring recognition have been recorded in other seabird studies (Pierotti and Murphy 1987;Pierotti et al 1988;Quinn et al 1994;Brown et al 1995;Gaston et al 1995), although others have reported failure to recognize foreign offspring over 10 days old (Hunt and Hunt 1975;Graves and Whiten 1980;Carter and Spear 1986;Galusha and Carter 1987 (17) ---Note: Feeding rates were standardized for the number of chicks present in the brood. Values are given as the mean ± SE.…”

Section: Testing Predictions Of the Intergenerational Conflict Hypothsupporting

confidence: 64%

Testing the intergenerational conflict hypothesis: factors affecting adoptions in Audouin's gulls, Larus audouinii

Oró¹,

Genovart²

1999

Can. J. Zool.

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We studied chick adoption in Audouin's gull, Larus audouinii, a ground-nesting seabird, to test several predictions made by the intergenerational-conflict hypothesis (ICH). The effects of food availability on adoptions were considered by comparing two breeding seasons with differing food supply. As predicted, adoptions were significantly more frequent when food was in shorter supply (48% of broods affected) than when it was more available (18.5%). Adoptions occurred during the first week of the chick-rearing stage; after that, aggression by adults towards intruding chicks increased significantly, which suggests that mechanisms of parent-offspring recognition were established. Foster parents incurred certain costs, since their offspring had lower chances of survival than those in control broods. However, contrary to the ICH hypothesis, adoptees did not select foster broods in relation to the age of the resident chicks. Survival of wandering chicks was no higher than that of chicks who stayed in their natal brood. Results suggest that chicks move only as a response to neighboring chicks being fed by an adult, and in Audouin's gulls, adoptions might be considered reproductive errors.Résumé : Nous avons étudié le phénomène d'adoption d'oisillons chez le Goéland d'Audouin, Larus audouinii, un oiseau de rivage qui niche au sol, dans le but de vérifier diverses prédictions générées par l'hypothèse des conflits entre générations (ICH). Les effets de la disponibilité de la nourriture sur les adoptions ont été comparés au cours de deux saisons de reproduction pendant lesquelles les apports de nourriture ont été variables. Tel que prédit, les adoptions se sont avérées significativement plus fréquentes lorsque la nourriture disponible était moins abondante (48% des couvées affectées) que lorsqu'elle était normalement abondante (18,5%). Les adoptions se faisaient au cours de la 1 ère semaine d'élevage des oisillons; après ce temps, l'agressivité des adultes envers les oisillons intrus augmentait significativement, ce qui indique que les mécanismes de reconnaissance parents-progéniture étaient alors déjà établis. Les parents adoptifs devaient faire face à certains coûts, puisque les chances de survie de leur progéniture devenaient plus faibles que celles des oisillons des couvées témoins. Cependant, contrairement aux suppositions de l'hypothèse ICH, les oisillons adoptés ne choisissaient pas leur couvée d'adoption en fonction de l'âge des oisillons déjà présents au nid. La survie des oisillons errants n'était pas plus élevée que celle des oisillons restés dans le nid natal. Les résultats indiquent que les oisillons quittent leur nid natal pour gagner un nouveau nid seulement lorsqu'ils voient des oisillons du voisinage être nourris par un adulte et les adoptions d'oisillons chez le Goéland d'Audouin peuvent être considérées comme des erreurs reproductives.[Traduit par la Rédaction] Oro and Genovart 439

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Section: Testing Predictions Of the Intergenerational Conflict Hypothsupporting

confidence: 64%

Testing the intergenerational conflict hypothesis: factors affecting adoptions in Audouin's gulls, Larus audouinii

Oró¹,

Genovart²

1999

Can. J. Zool.

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“…obs.). They have also been reported to adopt a nearby egg (Gaston et al 1993) or chick (Gaston et al 1995) if they lose their own. This type of behavior is rare among seabirds (Birkhead and Nettleship 1984).…”

Section: Evolution Of Alloparenting In Murresmentioning

confidence: 99%

Molecular Evidence for Kin Groups in the Absence of Large-Scale Genetic Differentiation in a Migratory Bird

Friesen

Montevecchi

Gaston³

et al. 1996

Evolution

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“…Adoption in seabirds is uncommon, but does occur in some seabird species (e.g., Gaston et al 1995;Brown 1998). At Punta Tombo, it is rare (\10 known instances in 28 years; Boersma, unpublished data).…”

Section: Discussionmentioning

confidence: 95%

“…Seabirds that live in colonies, especially those without distinct nest cups, need to be able to distinguish their own eggs from those of nearby conspecifics. Common Murres (Uria aalge) and Thick-billed Murres (U. lomvia), for example, use distinctive markings to recognize their own eggs (Birkhead 1978;Gaston et al 1993Gaston et al , 1995. The rare cases of incubation and even stealing of neighbors' eggs in Uria spp.…”

Section: Introductionmentioning

confidence: 98%

Patterns of acceptance of artificial eggs and chicks by Magellanic Penguins (Spheniscus magellanicus)

2012

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Adoption of Chicks among Thick-Billed Murres

Cited by 16 publications

References 4 publications

Testing the intergenerational conflict hypothesis: factors affecting adoptions in Audouin's gulls, Larus audouinii

Testing the intergenerational conflict hypothesis: factors affecting adoptions in Audouin's gulls, Larus audouinii

Molecular Evidence for Kin Groups in the Absence of Large-Scale Genetic Differentiation in a Migratory Bird

Patterns of acceptance of artificial eggs and chicks by Magellanic Penguins (Spheniscus magellanicus)

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