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Abstract:

Granivorous animals, through seed consumption, may have an important influence on plant abundance, distribution and species composition in desert ecosystems. The aims of this study are twofold: to quantify the diet of Pogonomyrmex rastratus (Mayr) and Pogonomyrmex pronotalis (Santschi), and to estimate seed removal per colony of both species throughout their activity season (October-April) in the central Monte desert, Argentina. Both species rely heavily upon seeds, which account for 87-94 % of the items carried to the nests. Their diets are similar, consisting mainly of grass seeds, which represent more than 93% of the seeds. Among them, three species predominate: Aristida spp., Trichloris crinita and Pappophorum spp. Seasonal variations as well as seed species richness in the diet are also similar between species. However, their food-handling behaviour differs: most caryopses carried by P. pronotalis bear bracts whereas most caryopses carried by P. rastratus lack them. Seed removal per colony by P. rastratus (6 × 104 seeds/colony) and by P. pronotalis (5 × 104 seeds/colony) throughout the season is similar to the one reported for P. occidentalis in North America. However, seed removal per hectare, which could be estimated for P. rastratus (8.3 × 105 seeds/ha), is lower than removal rates reported for the North American species P. barbatus, P. desertorum, P. rugosus and P. californicus, probably because P. rastratus has lower activity levels and smaller colonies than the North American studied species. © Birkhäuser Verlag, 2006.

Registro:

Documento: Artículo
Título:Diet and seed removal rates by the harvester ants Pogonomyrmex rastratus and Pogonomyrmex pronotalis in the central Monte desert, Argentina
Autor:Pirk, G.I.; Lopez De Casenave, J.
Filiación:Grupo de Investigación en Ecología de Comunidades de Desierto (Ecodes), Departamento de Ecología, Genética Y Evolución, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina
Palabras clave:Foraging activity; Granivory; Harvester ants; Pogonomyrmex pronotalis; Pogonomyrmex rastratus; ant; diet; foraging behavior; granivory; Argentina; Mendoza; Monte Desert; South America; Animalia; Aristida; Formicidae; Pappophorum; Pogonomyrmex pronotalis; Pogonomyrmex rastratus; Trichloris crinita
Año:2006
Volumen:53
Número:1
Página de inicio:119
Página de fin:125
DOI: http://dx.doi.org/10.1007/s00040-005-0845-6
Título revista:Insectes Sociaux
Título revista abreviado:Insectes Sociaux
ISSN:00201812
CODEN:INSOA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00201812_v53_n1_p119_Pirk

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Citas:

---------- APA ----------
Pirk, G.I. & Lopez De Casenave, J. (2006) . Diet and seed removal rates by the harvester ants Pogonomyrmex rastratus and Pogonomyrmex pronotalis in the central Monte desert, Argentina. Insectes Sociaux, 53(1), 119-125.
http://dx.doi.org/10.1007/s00040-005-0845-6
---------- CHICAGO ----------
Pirk, G.I., Lopez De Casenave, J. "Diet and seed removal rates by the harvester ants Pogonomyrmex rastratus and Pogonomyrmex pronotalis in the central Monte desert, Argentina" . Insectes Sociaux 53, no. 1 (2006) : 119-125.
http://dx.doi.org/10.1007/s00040-005-0845-6
---------- MLA ----------
Pirk, G.I., Lopez De Casenave, J. "Diet and seed removal rates by the harvester ants Pogonomyrmex rastratus and Pogonomyrmex pronotalis in the central Monte desert, Argentina" . Insectes Sociaux, vol. 53, no. 1, 2006, pp. 119-125.
http://dx.doi.org/10.1007/s00040-005-0845-6
---------- VANCOUVER ----------
Pirk, G.I., Lopez De Casenave, J. Diet and seed removal rates by the harvester ants Pogonomyrmex rastratus and Pogonomyrmex pronotalis in the central Monte desert, Argentina. Insectes Sociaux. 2006;53(1):119-125.
http://dx.doi.org/10.1007/s00040-005-0845-6