Consulta: creatorFacets:"Gantz,Alberto"
Registros recuperados: 5
Data/hora: 12/06/2024 15:46:12

Allochthonous and autochthonous components from gizzard grit of Theristicus melanopis in anthropogenic pastures of southern chile
Provedor de dados: Gayana
Autores: Gantz,Alberto; Valdivia,Carlos E; Yañez,Miguel; Sade,Soraya.
Numerous vertebrates, and in particular birds, ingest stones (geo-gastrolites) to favour the breakdown and digestion of food in the muscular stomachs. Between 1993 and 1994 we evaluated the quantity, relative abundance and quality of autochthonous (geo-gastrolites) and allochthonous (pieces of glass) components of the grit in gizzards of black-faced ibis (Theristicus melanopis) inhabiting the pastures of southern Chile. Grit elements were present in 32 out of 48 (66,7%) of all gizzard analysed. A total of 572 particles were recorded from which, 69.1% corresponded to autochthonous elements and 27.8% were allochthonous particles. Both components are similar in shape; however glass contributes considerably more in terms of mass. Gender differences reveal that...
Tipo: Journal article
Palavras-chave: Black-faced ibis; Glasses; Gastrolites; Pastures; South Chile.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382013000100003

ENSAMBLES DE AVES EN EL DESIERTO DE ATACAMA, NORTE GRANDE DE CHILE
Provedor de dados: Gayana
Autores: Gantz,Alberto; Rau,Jaime; Couve,Enrique.
Se evaluó la riqueza y composición de especies de aves en el desierto de Atacama, Norte Grande de Chile, entre 1996 y 1998. Mediante transectos lineales se estimó la riqueza de especies de aves en 9 localidades del desierto de Atacama agrupadas en cuatro zonas ecológicas: Desierto Litoral, Desierto Interior, Tropical Marginal y Tropical de Altura. La riqueza total de aves fue de 80 especies distribuidas en 51 géneros y 26 familias. La riqueza total observada corresponde al 52% de las aves históricamente descritas para el desierto del Norte Grande de Chile. Las zonas ecológicas del desierto litoral y tropical de altura poseen elementos avifaunísticos únicos para cada zona. Las aves insectívoras predominaron entre los demás gremios tróficos (40% del total de...
Tipo: Journal article
Palavras-chave: Aves terrestres; Chile; Desierto; Diversidad.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382009000200002

Use of tree species by White-throated treerunner (Pygarrhichas albogularis King) in a secondary native forest of southern Chile
Provedor de dados: Iheringia Série Zoologia
Autores: Gantz,Alberto; Yañez,Miguel; Orellana,José I.; Sade,Soraya; Valdivia,Carlos E.
ABSTRACT In forest ecosystems, numerous species of insectivorous birds use certain tree species as feeding and nesting substrates. Between 2009 and 2010, the use of different floristic components as feeding substrate by the Pygarrhichas albogularis King, 1831 was evaluated in a southern Chilean secondary native forest. From a total of 13 trees and bush species, six tree species were used by P. albogularis as a feeding substrate. Tree use was limited to intermediate heights (11-20 m) and, mainly, to the trunk (40% of observations) and secondary branches (26%). Pygarrhichas albogularis showed a disproportionated use of N. dombeyi and an important use of trees with a greater age structure (DBH 81-100 cm). Nothofagus dombeyi presented a significantly greater...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Temperate forest; Chile; White-throated Treerunner; Floristic use.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212015000200193

Phenological synchrony between the austral thrush Turdus falcklandii (Passeriformes: Turdidae) and its food resources within forests and prairies in southern Chile
Provedor de dados: Revista Chilena de Historia Natural
Autores: Orellana,José I; Smith-Ramírez,Cecilia; Rau,Jaime R; Sade,Soraya; Gantz,Alberto; Valdivia,Carlos E.
BACKGROUND: Frugivorous birds are phenologically linked to the fruits that they eat. When there is less fruit in seasonal environments, frugivorous birds complement their diet by eating invertebrates. The depth of the phenological link between frugivorous birds and their dietary resources has not been studied until now. The objective was to determine the possible phenological synchrony between the Austral thrush (Turdus falcklandii) and its dietary resource, fruits and annelids, found in the fragmented forests in the South of Chile. RESULTS: The numbers of thrushes, annelids, and fruits in fragments of native forest and anthropogenic grassland in Chile's Lake District were estimated annually. Spatial variation (i.e., forest and grassland) and seasonal...
Tipo: Journal article
Palavras-chave: Annelids; Fleshy fruit; Phenology; Seasonality; Turdus.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2014000100010

Diet of the Chilean flamingo Phoenicopterus chilensis (Phoenicopteriformes: Phoenicopteridae) in a coastal wetland in Chiloé, southern Chile
Provedor de dados: Revista Chilena de Historia Natural
Autores: Tobar,Claudio N; Rau,Jaime R; Fuentes,Norka; Gantz,Alberto; Suazo,Cristián G; Cursach,Jaime A; Santibañez,Alexis; Pérez-Schultheiss,Jorge.
BACKGROUND: The geographical distribution of the Chilean flamingo (Phoenicopterus chilensis) includes the southern-central Neotropics. Despite its wide distribution, currently there is no dietary information on its southern distribution range. From June to September 2011, we quantified the diet and prey availability of the Chilean flamingo in the marine wetland of Caulín (41°48' S, 73°37' W), southern Chile. RESULTS: The prey availability related to both plankton and benthos were four species of copepods, four polychaetes, one foraminifera, and two amphipods. The diet of the Chilean flamingo was composed of foraminifera (Ammonia beccarii), copepods (Harpacticus sp.) and polychaetes. The most abundant prey items from feces of flamingos were Ammonia beccarii...
Tipo: Journal article
Palavras-chave: Copepods; Diet selectivity; Migration; Trophic ecology.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2014000100014