Breeding ecology of the Eared Dove Zeinaida auriculata: II. Breeding season, breeding success and productivity of nesting colonies in Córdoba, Argentina

In central Argentina, Eared Dove populations have increased enormously since the late fifties as a consequence of the expansion of agriculture and the introduction of grain sorghum as a main crop. Following this build-up in numbers, several semi-permanent breeding colonies have been established in t...

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Autores principales: Bucher, Enrique H., Orueta, Alejandro
Formato: Artículo revista
Lenguaje:Español
Publicado: Centro de Ecología Aplicada del Litoral (Consejo Nacional de Investigaciones Científicas y Técnicas - Universidad Nacional de Nordeste) 2025
Acceso en línea:https://revistas.unne.edu.ar/index.php/eco/article/view/8474
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Revistas UNNE - Universidad Nacional del Noroeste (UNNE) de Universidad Nacional del Nordeste
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institution Universidad Nacional del Nordeste
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container_title_str Revistas UNNE - Universidad Nacional del Noroeste (UNNE)
language Español
format Artículo revista
author Bucher, Enrique H.
Orueta, Alejandro
spellingShingle Bucher, Enrique H.
Orueta, Alejandro
Breeding ecology of the Eared Dove Zeinaida auriculata: II. Breeding season, breeding success and productivity of nesting colonies in Córdoba, Argentina
author_facet Bucher, Enrique H.
Orueta, Alejandro
author_sort Bucher, Enrique H.
title Breeding ecology of the Eared Dove Zeinaida auriculata: II. Breeding season, breeding success and productivity of nesting colonies in Córdoba, Argentina
title_short Breeding ecology of the Eared Dove Zeinaida auriculata: II. Breeding season, breeding success and productivity of nesting colonies in Córdoba, Argentina
title_full Breeding ecology of the Eared Dove Zeinaida auriculata: II. Breeding season, breeding success and productivity of nesting colonies in Córdoba, Argentina
title_fullStr Breeding ecology of the Eared Dove Zeinaida auriculata: II. Breeding season, breeding success and productivity of nesting colonies in Córdoba, Argentina
title_full_unstemmed Breeding ecology of the Eared Dove Zeinaida auriculata: II. Breeding season, breeding success and productivity of nesting colonies in Córdoba, Argentina
title_sort breeding ecology of the eared dove zeinaida auriculata: ii. breeding season, breeding success and productivity of nesting colonies in córdoba, argentina
description In central Argentina, Eared Dove populations have increased enormously since the late fifties as a consequence of the expansion of agriculture and the introduction of grain sorghum as a main crop. Following this build-up in numbers, several semi-permanent breeding colonies have been established in the area.From 1970 through 1972, two of these roosts were visited weekly for a detailed study of nesting biology. Habitat and nest site preferences are described. Active nests were found in all months of the year. In general, nest density reached a peak (about 3,000 nests per hectare) in February-March and minimal values during winter (June-July), but considerable variations were found between years. The breeding population at peak densities was estimated at about three million birds in each colony.Hatching success was 49% and nestling success 75%, breeding success being 37%. Great variations in success were registered between places and years. Causes of failure are discussed, being mainly due to predation. Estimations of productivity are given.Nest density and breeding success appeared to be correlated with availability of food, particularly grain sorghum, which seems to be the main proximate factor controlling the breeding of Zenaida auriculata. At the same time, some degree of photoperiodical influence is likely to occur, at least in certain individuals.The significance of communal breeding in the Eared Dove is discussed. Finally, a list of the breeding colonies detected in Córdoba is included.
publisher Centro de Ecología Aplicada del Litoral (Consejo Nacional de Investigaciones Científicas y Técnicas - Universidad Nacional de Nordeste)
publishDate 2025
url https://revistas.unne.edu.ar/index.php/eco/article/view/8474
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AT oruetaalejandro breedingecologyoftheeareddovezeinaidaauriculataiibreedingseasonbreedingsuccessandproductivityofnestingcoloniesincordobaargentina
AT bucherenriqueh ecologiadelareproducciondelapalomazeinaidaauriculataiiepocadecriasucesoyproductividadenlascoloniasdenidificaciondecordoba
AT oruetaalejandro ecologiadelareproducciondelapalomazeinaidaauriculataiiepocadecriasucesoyproductividadenlascoloniasdenidificaciondecordoba
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last_indexed 2025-08-17T05:02:40Z
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spelling I48-R154-article-84742025-07-18T11:33:19Z Breeding ecology of the Eared Dove Zeinaida auriculata: II. Breeding season, breeding success and productivity of nesting colonies in Córdoba, Argentina Ecología de la reproducción de la paloma Zeinaida auriculata: II. Epoca de cría, suceso y productividad en las colonias de nidificación de Córdoba Bucher, Enrique H. Orueta, Alejandro In central Argentina, Eared Dove populations have increased enormously since the late fifties as a consequence of the expansion of agriculture and the introduction of grain sorghum as a main crop. Following this build-up in numbers, several semi-permanent breeding colonies have been established in the area.From 1970 through 1972, two of these roosts were visited weekly for a detailed study of nesting biology. Habitat and nest site preferences are described. Active nests were found in all months of the year. In general, nest density reached a peak (about 3,000 nests per hectare) in February-March and minimal values during winter (June-July), but considerable variations were found between years. The breeding population at peak densities was estimated at about three million birds in each colony.Hatching success was 49% and nestling success 75%, breeding success being 37%. Great variations in success were registered between places and years. Causes of failure are discussed, being mainly due to predation. Estimations of productivity are given.Nest density and breeding success appeared to be correlated with availability of food, particularly grain sorghum, which seems to be the main proximate factor controlling the breeding of Zenaida auriculata. At the same time, some degree of photoperiodical influence is likely to occur, at least in certain individuals.The significance of communal breeding in the Eared Dove is discussed. Finally, a list of the breeding colonies detected in Córdoba is included. En el centro de Argentina, las poblaciones de torcaza (Zenaida auriculata) han aumentado enormemente desde fines de la década de 1950 como consecuencia de la expansión de la agricultura y la introducción del sorgo granífero como cultivo principal. A partir de este incremento poblacional, se establecieron varias colonias de cría semipermanentes en la zona.Entre 1970 y 1972, se visitaron semanalmente dos de estos dormideros para realizar un estudio detallado de la biología reproductiva. Se describen las preferencias de hábitat y de sitios de nidificación. Se encontraron nidos activos durante todos los meses del año. En general, la densidad de nidos alcanzó un pico (alrededor de 3.000 nidos por hectárea) en febrero-marzo y valores mínimos durante el invierno (junio-julio), aunque se registraron variaciones considerables entre años. Se estimó que la población reproductiva en los momentos de máxima densidad alcanzaba aproximadamente los tres millones de aves en cada colonia.El éxito de eclosión fue del 49 % y el éxito de los pichones del 75 %, con un éxito reproductivo total del 37 %. Se registraron grandes variaciones en el éxito entre lugares y años. Se discuten las causas de fracaso reproductivo, siendo principalmente la depredación. Se presentan estimaciones de productividad.La densidad de nidos y el éxito reproductivo parecieron estar correlacionados con la disponibilidad de alimento, en particular de sorgo granífero, que parece ser el principal factor próximo que controla la reproducción de Zenaida auriculata. Al mismo tiempo, es probable que exista cierto grado de influencia fotoperiódica, al menos en algunos individuos.Se discute la importancia de la reproducción comunal en la torcaza. Finalmente, se incluye una lista de las colonias reproductivas detectadas en Córdoba. Centro de Ecología Aplicada del Litoral (Consejo Nacional de Investigaciones Científicas y Técnicas - Universidad Nacional de Nordeste) 2025-07-18 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Artículo revisado por pares application/pdf https://revistas.unne.edu.ar/index.php/eco/article/view/8474 Ecosur; 1977: vol. 4, no. 8; 157-185 0325-108X spa https://revistas.unne.edu.ar/index.php/eco/article/view/8474/8025

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