Parámetros reproductivos del caracolero (Rostrhamus sociabilis) (Aves: Accipitridae) en Santa Fe, Argentina
Reproduction is a fundamental process in the history of bird life and one which demands greater energy expenditure in bird life cycles. The reproductive biology of the R. sociabilis was studied in the lagoon of the Santa Fe. All nests (N = 46) were built on Solanum glaucophyllum at 1.10 ± 0.26 m water level, recording per nest 2-3 (2.76 ± 0.43) eggs, an average the length, width and weight were: 43.18 ± 1.53 mm, 35.52 mm and 28.05 ± 1.23 ± 2.86 g, respectively. The size of the eggs was not affected by the amount of the eggs in the nest (nests with two eggs vs three eggs). If differences between the height of the nests were observed as were higher which contained two eggs. The reproductive suc- cess was 49.0%, 41.0% the brood, hatching the 67.0% (N = 94) and 63.0% of fledging. Of the total monitored 19 nests failed (N = 46), six did so by environmental factors and six by intrinsic factors of the species. The crude death rate was 57.0%, the rate of age-specific mortality 33.0% (egg) and 36.0% (chicks). The daily mortality rate of nests was 12.4%, the holding period of the chicks in the nest was 24.17 ± 5.08 days and the average number of fledglings per nest was 2-3 (2.0 ± 0.6). These data provide new input on the environmental and intrinsic factors that presumably influence the reproductive parameters of R. sociabilis .
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Fundación Miguel Lillo
2017
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rev-actazoologica-ar-article-452018-10-10T12:07:18Z Parámetros reproductivos del caracolero (Rostrhamus sociabilis) (Aves: Accipitridae) en Santa Fe, Argentina Olguín, Pamela Regner, Silvia Giraudo, Alejandro Lorenzón, Rodrigo León, Evelina Beltzer, Adolfo Biología reproductiva reproducción en aves Reproductive biology reproduction in birds Reproduction is a fundamental process in the history of bird life and one which demands greater energy expenditure in bird life cycles. The reproductive biology of the R. sociabilis was studied in the lagoon of the Santa Fe. All nests (N = 46) were built on Solanum glaucophyllum at 1.10 ± 0.26 m water level, recording per nest 2-3 (2.76 ± 0.43) eggs, an average the length, width and weight were: 43.18 ± 1.53 mm, 35.52 mm and 28.05 ± 1.23 ± 2.86 g, respectively. The size of the eggs was not affected by the amount of the eggs in the nest (nests with two eggs vs three eggs). If differences between the height of the nests were observed as were higher which contained two eggs. The reproductive suc- cess was 49.0%, 41.0% the brood, hatching the 67.0% (N = 94) and 63.0% of fledging. Of the total monitored 19 nests failed (N = 46), six did so by environmental factors and six by intrinsic factors of the species. The crude death rate was 57.0%, the rate of age-specific mortality 33.0% (egg) and 36.0% (chicks). The daily mortality rate of nests was 12.4%, the holding period of the chicks in the nest was 24.17 ± 5.08 days and the average number of fledglings per nest was 2-3 (2.0 ± 0.6). These data provide new input on the environmental and intrinsic factors that presumably influence the reproductive parameters of R. sociabilis . La reproducción es un proceso fundamental de la historia de vida de las aves y uno de los que demandan mayor gasto de energía en sus ciclos de vida. Se estudió la biología reproductiva de R. sociabilis en una laguna de Santa Fe. Todos los nidos (N = 46) se construyeron sobre Solanum glaucophyllum a 1,10 ± 0,26 m sobre el nivel del agua, reg- istrando 2,76 ± 0,43 huevos por nido. Los huevos tuvieron una longitud, ancho y peso de: 43,18 ± 1,53 mm, 35,52 ± 1,23 mm y 28,05 ± 2,86 g, respectivamente. El tamaño de los huevos no fue afectado por la cantidad de los mismos en el nido (nidos con dos huevos vs tres huevos). La altura de los nidos fue mayor en aquellos que contuvieron dos huevos. El éxito reproductivo fue del 49%, el de nidada 41%, el de eclosión 67% (N = 94) y el de vo- lantón 63%. De 19 nidos que fracasaron (N = 46), seis lo hicieron por factores ambientales y seis por factores intrínsecos de la especie. La tasa bruta de mortalidad fue 57%, tasa de mortalidad específica por edades 33% (huevo) y del 36% (pichón) y la tasa de mortalidad diaria de los nidos fue de 12,4%. El período de permanencia de los pichones en el nido fue de 24,17± 5,08 días y el número de volantones por nido fue de 2 ± 0,6. Estos datos consti- tuyen nuevos aporte sobre los factores ambientales e intrínsecos que, presuntamente influyen en los parámetros reproductivos de R. sociabilis. Fundación Miguel Lillo 2017-06-08 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://www.lillo.org.ar/journals/index.php/acta-zoologica-lilloana/article/view/v61n1a04 Acta Zoológica Lilloana; Acta Zoológica Lilloana 61 (1) (2017); 36-41 Acta Zoológica Lilloana; Acta Zoológica Lilloana 61 (1) (2017); 36-41 Acta Zoológica Lilloana; Acta Zoológica Lilloana 61 (1) (2017); 36-41 1852-6098 spa http://www.lillo.org.ar/journals/index.php/acta-zoologica-lilloana/article/view/v61n1a04/57 http://www.lillo.org.ar/journals/index.php/acta-zoologica-lilloana/article/view/v61n1a04/58 |
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Olguín, Pamela Regner, Silvia Giraudo, Alejandro Lorenzón, Rodrigo León, Evelina Beltzer, Adolfo |
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Olguín, Pamela Regner, Silvia Giraudo, Alejandro Lorenzón, Rodrigo León, Evelina Beltzer, Adolfo Parámetros reproductivos del caracolero (Rostrhamus sociabilis) (Aves: Accipitridae) en Santa Fe, Argentina |
author_facet |
Olguín, Pamela Regner, Silvia Giraudo, Alejandro Lorenzón, Rodrigo León, Evelina Beltzer, Adolfo |
author_sort |
Olguín, Pamela |
title |
Parámetros reproductivos del caracolero (Rostrhamus sociabilis) (Aves: Accipitridae) en Santa Fe, Argentina |
title_short |
Parámetros reproductivos del caracolero (Rostrhamus sociabilis) (Aves: Accipitridae) en Santa Fe, Argentina |
title_full |
Parámetros reproductivos del caracolero (Rostrhamus sociabilis) (Aves: Accipitridae) en Santa Fe, Argentina |
title_fullStr |
Parámetros reproductivos del caracolero (Rostrhamus sociabilis) (Aves: Accipitridae) en Santa Fe, Argentina |
title_full_unstemmed |
Parámetros reproductivos del caracolero (Rostrhamus sociabilis) (Aves: Accipitridae) en Santa Fe, Argentina |
title_sort |
parámetros reproductivos del caracolero (rostrhamus sociabilis) (aves: accipitridae) en santa fe, argentina |
description |
Reproduction is a fundamental process in the history of bird life and one which demands greater energy expenditure in bird life cycles. The reproductive biology of the R. sociabilis was studied in the lagoon of the Santa Fe. All nests (N = 46) were built on Solanum glaucophyllum at 1.10 ± 0.26 m water level, recording per nest 2-3 (2.76 ± 0.43) eggs, an average the length, width and weight were: 43.18 ± 1.53 mm, 35.52 mm and 28.05 ± 1.23 ± 2.86 g, respectively. The size of the eggs was not affected by the amount of the eggs in the nest (nests with two eggs vs three eggs). If differences between the height of the nests were observed as were higher which contained two eggs. The reproductive suc- cess was 49.0%, 41.0% the brood, hatching the 67.0% (N = 94) and 63.0% of fledging. Of the total monitored 19 nests failed (N = 46), six did so by environmental factors and six by intrinsic factors of the species. The crude death rate was 57.0%, the rate of age-specific mortality 33.0% (egg) and 36.0% (chicks). The daily mortality rate of nests was 12.4%, the holding period of the chicks in the nest was 24.17 ± 5.08 days and the average number of fledglings per nest was 2-3 (2.0 ± 0.6). These data provide new input on the environmental and intrinsic factors that presumably influence the reproductive parameters of R. sociabilis . |
publisher |
Fundación Miguel Lillo |
publishDate |
2017 |
url |
http://www.lillo.org.ar/journals/index.php/acta-zoologica-lilloana/article/view/v61n1a04 |
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