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

Roberto Aguilar, Alejandro Simeone, Jürgen Rottmann, Marietta Perucci, Guillermo Luna-Jorquera

Resultado de la investigación: Article

3 Citas (Scopus)

Resumen

The 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 colonies 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, energy 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.

Idioma originalEnglish
Páginas (desde-hasta)69-73
Número de páginas5
PublicaciónWaterbirds
Volumen39
N.º1
DOI
EstadoPublished - 1 mar 2016

Huella dactilar

Laridae
Chile
deserts
playas
breeding
coasts
oviposition
chicks
predation
dogs
energy expenditure
breeding season
solar radiation
rocks
nests
life history
foraging
breeds
habitats

ASJC Scopus subject areas

  • Animal Science and Zoology

Citar esto

Aguilar, Roberto ; Simeone, Alejandro ; Rottmann, Jürgen ; Perucci, Marietta ; Luna-Jorquera, Guillermo. / Unusual coastal breeding in the desert-nesting Gray Gull (Leucophaeus modestus) in northern Chile. En: Waterbirds. 2016 ; Vol. 39, N.º 1. pp. 69-73.
@article{c5d91152255b4accb1b56c2483c37d60,
title = "Unusual coastal breeding in the desert-nesting Gray Gull (Leucophaeus modestus) in northern Chile",
abstract = "The 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 colonies 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, energy 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 Ni{\~n}o years in response to reduced food supply. During El Ni{\~n}o 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 Ni{\~n}o 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 Ni{\~n}o years or if this becomes a regular behavior independent of oceanographic conditions.",
keywords = "breeding biology, coastal nesting, desert nesting, El Ni{\~n}o, Gray Gull, Leucophaeus modestus, northern Chile",
author = "Roberto Aguilar and Alejandro Simeone and J{\"u}rgen Rottmann and Marietta Perucci and Guillermo Luna-Jorquera",
year = "2016",
month = "3",
day = "1",
doi = "10.1675/063.039.0108",
language = "English",
volume = "39",
pages = "69--73",
journal = "Colonial Waterbirds",
issn = "0738-6028",
publisher = "The Waterbird Society",
number = "1",

}

Unusual coastal breeding in the desert-nesting Gray Gull (Leucophaeus modestus) in northern Chile. / Aguilar, Roberto; Simeone, Alejandro; Rottmann, Jürgen; Perucci, Marietta; Luna-Jorquera, Guillermo.

En: Waterbirds, Vol. 39, N.º 1, 01.03.2016, p. 69-73.

Resultado de la investigación: Article

TY - JOUR

T1 - Unusual coastal breeding in the desert-nesting Gray Gull (Leucophaeus modestus) in northern Chile

AU - Aguilar, Roberto

AU - Simeone, Alejandro

AU - Rottmann, Jürgen

AU - Perucci, Marietta

AU - Luna-Jorquera, Guillermo

PY - 2016/3/1

Y1 - 2016/3/1

N2 - The 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 colonies 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, energy 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.

AB - The 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 colonies 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, energy 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.

KW - breeding biology

KW - coastal nesting

KW - desert nesting

KW - El Niño

KW - Gray Gull

KW - Leucophaeus modestus

KW - northern Chile

UR - http://www.scopus.com/inward/record.url?scp=84962560676&partnerID=8YFLogxK

U2 - 10.1675/063.039.0108

DO - 10.1675/063.039.0108

M3 - Article

AN - SCOPUS:84962560676

VL - 39

SP - 69

EP - 73

JO - Colonial Waterbirds

JF - Colonial Waterbirds

SN - 0738-6028

IS - 1

ER -