Reduced oxygen diffusion across the shell of Gray gull (Larus modestus) eggs

Gray gulls, Larus modestus, nest 1500 m above sea level in northern Chile's Atacama Desert, one of the driest in the world. Their eggshell gas permeability, one third of that found in other Larus species, is an adaptation that reduces water loss, but at the expense of oxygen diffusion into the...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	MONGE,C C, OSTOJIC,H, AGUILAR,R, CIFUENTES,V
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2000
Materias:	Atacama eggshell oxygen conductance oxygen consumption Gray gull (Larus modestus)
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602000000300007
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:scielo:S0716-97602000000300007
record_format	dspace
spelling	oai:scielo:S0716-976020000003000072014-05-06Reduced oxygen diffusion across the shell of Gray gull (Larus modestus) eggsMONGE,C COSTOJIC,HAGUILAR,RCIFUENTES,V Atacama eggshell oxygen conductance oxygen consumption Gray gull (Larus modestus) Gray gulls, Larus modestus, nest 1500 m above sea level in northern Chile's Atacama Desert, one of the driest in the world. Their eggshell gas permeability, one third of that found in other Larus species, is an adaptation that reduces water loss, but at the expense of oxygen diffusion into the air cell with resultant hypoxia and reduced metabolic rate. This contrasts with characteristics found in birds nesting at very high altitudes where oxygen diffusion across the egg shell is maximized at the expense of water conservation. The oxygen consumption (MO2) of Larus modestus is 66% that of Larus argentatus; the oxygen conductance (GO2) is equivalent to 48% of that obtained in 5 other bird species. The oxygen partial pressure (PAO2) in the air chamber of Larus modestus (84 Torr) is lower than that of 10 other bird species whose average (PAO2) is 106 Torr. The CO2 partial pressure (PACO2) in the air chamber of Larus modestus is 68 Torr, a higher value than that found in 9 other bird species whose average (PACO2) is 39 Torr.info:eu-repo/semantics/openAccessSociedad de Biología de ChileBiological Research v.33 n.3-4 20002000-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602000000300007en10.4067/S0716-97602000000300007
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Atacama eggshell oxygen conductance oxygen consumption Gray gull (Larus modestus)
spellingShingle	Atacama eggshell oxygen conductance oxygen consumption Gray gull (Larus modestus) MONGE,C C OSTOJIC,H AGUILAR,R CIFUENTES,V Reduced oxygen diffusion across the shell of Gray gull (Larus modestus) eggs
description	Gray gulls, Larus modestus, nest 1500 m above sea level in northern Chile's Atacama Desert, one of the driest in the world. Their eggshell gas permeability, one third of that found in other Larus species, is an adaptation that reduces water loss, but at the expense of oxygen diffusion into the air cell with resultant hypoxia and reduced metabolic rate. This contrasts with characteristics found in birds nesting at very high altitudes where oxygen diffusion across the egg shell is maximized at the expense of water conservation. The oxygen consumption (MO2) of Larus modestus is 66% that of Larus argentatus; the oxygen conductance (GO2) is equivalent to 48% of that obtained in 5 other bird species. The oxygen partial pressure (PAO2) in the air chamber of Larus modestus (84 Torr) is lower than that of 10 other bird species whose average (PAO2) is 106 Torr. The CO2 partial pressure (PACO2) in the air chamber of Larus modestus is 68 Torr, a higher value than that found in 9 other bird species whose average (PACO2) is 39 Torr.
author	MONGE,C C OSTOJIC,H AGUILAR,R CIFUENTES,V
author_facet	MONGE,C C OSTOJIC,H AGUILAR,R CIFUENTES,V
author_sort	MONGE,C C
title	Reduced oxygen diffusion across the shell of Gray gull (Larus modestus) eggs
title_short	Reduced oxygen diffusion across the shell of Gray gull (Larus modestus) eggs
title_full	Reduced oxygen diffusion across the shell of Gray gull (Larus modestus) eggs
title_fullStr	Reduced oxygen diffusion across the shell of Gray gull (Larus modestus) eggs
title_full_unstemmed	Reduced oxygen diffusion across the shell of Gray gull (Larus modestus) eggs
title_sort	reduced oxygen diffusion across the shell of gray gull (larus modestus) eggs
publisher	Sociedad de Biología de Chile
publishDate	2000
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602000000300007
work_keys_str_mv	AT mongecc reducedoxygendiffusionacrosstheshellofgraygulllarusmodestuseggs AT ostojich reducedoxygendiffusionacrosstheshellofgraygulllarusmodestuseggs AT aguilarr reducedoxygendiffusionacrosstheshellofgraygulllarusmodestuseggs AT cifuentesv reducedoxygendiffusionacrosstheshellofgraygulllarusmodestuseggs
_version_	1718441321825304576

Reduced oxygen diffusion across the shell of Gray gull (Larus modestus) eggs

Ejemplares similares