Allochthonous and autochthonous components from gizzard grit of Theristicus melanopis in anthropogenic pastures of southern chile
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...
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| Lenguaje: | English |
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Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción
2013
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oai:scielo:S0717-653820130001000032013-10-15Allochthonous and autochthonous components from gizzard grit of Theristicus melanopis in anthropogenic pastures of southern chileGantz,AlbertoValdivia,Carlos EYañez,MiguelSade,Soraya Black-faced ibis glasses gastrolites pastures south Chile 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 females consume a significantly greater number of allochthonous elements than males. We postulate the hypothesis that, due to their high energy requirements, females ingest more pieces of glass to facilitate the breakdown and digestion of food with a limited nutritional value, thus increasing their reproductive success.info:eu-repo/semantics/openAccessFacultad de Ciencias Naturales y Oceanográficas, Universidad de ConcepciónGayana (Concepción) v.77 n.1 20132013-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382013000100003en10.4067/S0717-65382013000100003 |
| institution |
Scielo Chile |
| collection |
Scielo Chile |
| language |
English |
| topic |
Black-faced ibis glasses gastrolites pastures south Chile |
| spellingShingle |
Black-faced ibis glasses gastrolites pastures south Chile Gantz,Alberto Valdivia,Carlos E Yañez,Miguel Sade,Soraya Allochthonous and autochthonous components from gizzard grit of Theristicus melanopis in anthropogenic pastures of southern chile |
| description |
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 females consume a significantly greater number of allochthonous elements than males. We postulate the hypothesis that, due to their high energy requirements, females ingest more pieces of glass to facilitate the breakdown and digestion of food with a limited nutritional value, thus increasing their reproductive success. |
| author |
Gantz,Alberto Valdivia,Carlos E Yañez,Miguel Sade,Soraya |
| author_facet |
Gantz,Alberto Valdivia,Carlos E Yañez,Miguel Sade,Soraya |
| author_sort |
Gantz,Alberto |
| title |
Allochthonous and autochthonous components from gizzard grit of Theristicus melanopis in anthropogenic pastures of southern chile |
| title_short |
Allochthonous and autochthonous components from gizzard grit of Theristicus melanopis in anthropogenic pastures of southern chile |
| title_full |
Allochthonous and autochthonous components from gizzard grit of Theristicus melanopis in anthropogenic pastures of southern chile |
| title_fullStr |
Allochthonous and autochthonous components from gizzard grit of Theristicus melanopis in anthropogenic pastures of southern chile |
| title_full_unstemmed |
Allochthonous and autochthonous components from gizzard grit of Theristicus melanopis in anthropogenic pastures of southern chile |
| title_sort |
allochthonous and autochthonous components from gizzard grit of theristicus melanopis in anthropogenic pastures of southern chile |
| publisher |
Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción |
| publishDate |
2013 |
| url |
http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382013000100003 |
| work_keys_str_mv |
AT gantzalberto allochthonousandautochthonouscomponentsfromgizzardgritoftheristicusmelanopisinanthropogenicpasturesofsouthernchile AT valdiviacarlose allochthonousandautochthonouscomponentsfromgizzardgritoftheristicusmelanopisinanthropogenicpasturesofsouthernchile AT yanezmiguel allochthonousandautochthonouscomponentsfromgizzardgritoftheristicusmelanopisinanthropogenicpasturesofsouthernchile AT sadesoraya allochthonousandautochthonouscomponentsfromgizzardgritoftheristicusmelanopisinanthropogenicpasturesofsouthernchile |
| _version_ |
1718442156806373376 |