Unusual coastal breeding in the desert-nesting Gray Gull (Leucophaeus modestus) in northern Chile

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dc.contributor.authorAguilar, Roberto
dc.contributor.authorSimeone, Alejandro
dc.contributor.authorRottmann, Jürgen
dc.contributor.authorPerucci, Marietta
dc.contributor.authorLuna-Jorquera, Guillermo
dc.date.accessioned2023-11-10T18:13:18Z
dc.date.available2023-11-10T18:13:18Z
dc.date.issued2016-03
dc.descriptionIndexación: Scopus.es
dc.description.abstractThe Gray Gull (Leucophaeus modestus) has the unique habit among gulls of nesting in the interior Atacama Desert, up to 100 km from the coast. During the 2014-2015 austral breeding season, two breeding colo nies were recorded on the coast within 90 m of the shoreline in the Antofagasta Region, northern Chile. The new colonies ranged in size from 40 (Playa Grande) to 150 (Playa Brava) nests. Egg laying was synchronous in both colonies and most likely occurred in late November 2014, coinciding with egg laying in desert colonies. The colony at Playa Brava was successful, but the one at Playa Grande was deserted due to feral dog (Canis familiaris) attacks. The habitat used by Gray Gulls resembled that reported for desert colonies, with flat plains covered with small rocks, which provide protection to chicks from intense solar radiation. This unusual coastal nesting behavior could result in the modification of certain life history and behavioral traits in the Gray Gull (e.g., chick growth rates, en ergy expenditure, and foraging ranges), which have evolved to breed in severe desert conditions. We suggest that coastal breeding is adopted by Gray Gulls during El Niño years in response to reduced food supply. During El Niño years, Gray Gulls would move to the coast where access to food is better and thermoregulatory costs are lower, but predation is higher. During non-El Niño years, Gray Gulls would resume their ancestral desert-nesting strategy in which traveling distances between the coast and nesting grounds are considerable and thermoregulatory costs are higher, but predation risks are lower. Future observations should confirm if Gray Gulls continue breeding at coastal sites during El Niño years or if this becomes a regular behavior independent of oceanographic conditions. Received 7 April 2015, accepted 12 May 2015.es
dc.description.urihttps://bioone.org/journals/waterbirds/volume-39/issue-1/063.039.0108/Unusual-Coastal-Breeding-in-the-Desert-Nesting-Gray-Gull-Leucophaeus/10.1675/063.039.0108.full
dc.identifier.citationWaterbirds. Volume 39, Issue 1, Pages 69 - 73. 1 March 2016es
dc.identifier.doi10.1675/063.039.0108
dc.identifier.issn1524-4695
dc.identifier.urihttps://repositorio.unab.cl/xmlui/handle/ria/53906
dc.language.isoenes
dc.publisherThe Waterbird Societyes
dc.subjectBreeding Biologyes
dc.subjectCoastal Nestinges
dc.subjectDesert Nestinges
dc.subjectEl Niñoes
dc.subjectGray Gulles
dc.subjectLeucophaeus Modestuses
dc.subjectNorthern Chilees
dc.titleUnusual coastal breeding in the desert-nesting Gray Gull (Leucophaeus modestus) in northern Chilees
dc.typeArtículoes
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