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Abstract:

During recruitment, running velocity of both outbound and laden workers of the leaf-cutting ant Acromyrmex lundi depended on the information about resource quality they received from the first successful recruiter. In independent assays, single scout ants were allowed to collect sugar solutions of different concentrations and to recruit nestmates. Recruited workers were presented with standardized paper discs rather than the sugar solution given to the original recruiting ant. Outbound recruited workers were observed to run faster the more concentrated the solution found by the recruiter. Speed of disc-laden workers also depended on the concentration of the solution found by the recruiter, i.e. on the information about food quality they received, since they had no actual contact with the sugar solution. Disc-laden workers ran, as intuitively expected, slower than outbound workers. The reduction in speed, however, could not be attributed to the effects of the load itself, because workers collecting discs of the same weight, but with added sugar, ran as rapidly as outbound, unladen workers. Workers collecting standardized sugared discs reinforced the chemical trail on their way to the nest. The percentage of trail-layers was higher when workers were recruited to 10% than to 1% sugar solution, even though they collected the same kind of discs at the source. Their evaluation of resource quality, therefore, depended on their motivational state, which was modulated by the information they received during recruitment. Using previously published data on energetics of locomotion in leaf-cutting ants, travel costs of A. lundi workers recruited to sugar solutions of different concentration could be estimated. For workers recruited to the more concentrated solution, both speed and oxygen consumption rate increased by a roughly similar factor. Therefore, although workers ran faster to the high-quality resource, their actual energy investment per trip remained similar to that made by workers recruited to the low-quality resource. It is suggested that the more motivated workers reduced travel time without increasing energy costs during the trip. The adaptive value of these responses seems to be related to a rapid transmission of information about a newly discovered food source. © 1993 Springer-Verlag.

Registro:

Documento: Artículo
Título:Both evaluation of resource quality and speed of recruited leaf-cutting ants (Acromyrmex lundi) depend on their motivational state
Autor:Roces, F.
Filiación:Departamento de Ciencias Biológicas, Universidad de Buenos Aires, Pab II Ciudad Universitaria, Buenos Aires, 1428, Argentina
Theodor-Boveri-Institut, Lehrstuhl für Verhaltensphysiologie und Soziobiologie der Universität, Am Hubland, D-97074, Würzburg, Germany
Palabras clave:Acromyrmex; Foraging; Leaf-cutting ants; Motivation; ant; foraging; leaf-cutter ant; recruitment; Acromyrmex lundi
Año:1993
Volumen:33
Número:3
Página de inicio:183
Página de fin:189
DOI: http://dx.doi.org/10.1007/BF00216599
Título revista:Behavioral Ecology and Sociobiology
Título revista abreviado:Behav Ecol Sociobiol
ISSN:03405443
CODEN:BESOD
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03405443_v33_n3_p183_Roces

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Citas:

---------- APA ----------
(1993) . Both evaluation of resource quality and speed of recruited leaf-cutting ants (Acromyrmex lundi) depend on their motivational state. Behavioral Ecology and Sociobiology, 33(3), 183-189.
http://dx.doi.org/10.1007/BF00216599
---------- CHICAGO ----------
Roces, F. "Both evaluation of resource quality and speed of recruited leaf-cutting ants (Acromyrmex lundi) depend on their motivational state" . Behavioral Ecology and Sociobiology 33, no. 3 (1993) : 183-189.
http://dx.doi.org/10.1007/BF00216599
---------- MLA ----------
Roces, F. "Both evaluation of resource quality and speed of recruited leaf-cutting ants (Acromyrmex lundi) depend on their motivational state" . Behavioral Ecology and Sociobiology, vol. 33, no. 3, 1993, pp. 183-189.
http://dx.doi.org/10.1007/BF00216599
---------- VANCOUVER ----------
Roces, F. Both evaluation of resource quality and speed of recruited leaf-cutting ants (Acromyrmex lundi) depend on their motivational state. Behav Ecol Sociobiol. 1993;33(3):183-189.
http://dx.doi.org/10.1007/BF00216599