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Abstract:

Aspects of the breeding biology of the Gentoo Penguin Pygoscelis papua were studied at Cierva Point, Antarctic Peninsula (64°09'S, 60°57'W). From a breeding population of 1044 pairs (85% with two eggs), 83% raised at least one chick to fledging. Survival in different subcolonies was neither correlated with perimeter-area ratio nor with distance to the sea. Chick mortality at the end of January 1993 was 23.9%, whereas for the 1991/92 breeding season it was 14.0%; for 1993/94, 23.9%; for 1994/95, 33.0% and for 1995/96 24.3%. By 17 February 1993, chick mortality was 32.3%. Chick survival was regressed against time for nine selected subcolonies, showing a high correlation between them. Covariance analysis among the regression line slopes showed a non-significant result (F = 0.42, P > 0.05). No significant differences were also observed when Tuckey's multiple contrasts test was performed on the proportions of surviving chicks in-between weeks (P > 0.05), showing a gradual mortality of chicks from egg-laying to créching. These results show that the Gentoo Penguin colony at Cierva Point contains a higher proportion of pairs rearing two chicks and a lower mortality rate than does the species at other maritime Antarctic sites. Average annual growth of the colony increased by 5.7% from 1991 to 1996, in contrast to the period 1954-1958 when the colony decreased by -2.3%. The low impact of the Argentinean station near the study area could account for this fact.

Registro:

Documento: Artículo
Título:Breeding dynamics of a gentoo penguin Pygoscelis papua population at cierva point, Antarctic Peninsula
Autor:Quintana, R.D.; Cirelli, V.
Filiación:GESER, Univ. de Buenos Aires, Facultad de Cs. Exactas y Naturales, Buenos Aires 1428, Argentina
Palabras clave:population dynamics; reproductive biology; seabird; Antarctica
Año:2000
Volumen:28
Número:1
Página de inicio:29
Página de fin:35
Título revista:Marine Ornithology
Título revista abreviado:Mar. Ornithol.
ISSN:10183337
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10183337_v28_n1_p29_Quintana

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Citas:

---------- APA ----------
Quintana, R.D. & Cirelli, V. (2000) . Breeding dynamics of a gentoo penguin Pygoscelis papua population at cierva point, Antarctic Peninsula. Marine Ornithology, 28(1), 29-35.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10183337_v28_n1_p29_Quintana [ ]
---------- CHICAGO ----------
Quintana, R.D., Cirelli, V. "Breeding dynamics of a gentoo penguin Pygoscelis papua population at cierva point, Antarctic Peninsula" . Marine Ornithology 28, no. 1 (2000) : 29-35.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10183337_v28_n1_p29_Quintana [ ]
---------- MLA ----------
Quintana, R.D., Cirelli, V. "Breeding dynamics of a gentoo penguin Pygoscelis papua population at cierva point, Antarctic Peninsula" . Marine Ornithology, vol. 28, no. 1, 2000, pp. 29-35.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10183337_v28_n1_p29_Quintana [ ]
---------- VANCOUVER ----------
Quintana, R.D., Cirelli, V. Breeding dynamics of a gentoo penguin Pygoscelis papua population at cierva point, Antarctic Peninsula. Mar. Ornithol. 2000;28(1):29-35.
Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10183337_v28_n1_p29_Quintana [ ]