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Consumption of lipid-rich seed arils improves larval development in a Neotropical primarily carnivorous ant, Odontomachus chelifer (Ponerinae)

Published online by Cambridge University Press:  29 August 2014

Claudia Bottcher  and
Paulo S. Oliveira
Claudia Bottcher
Affiliation:
Programa de Pós-Graduação em Ecologia, Universidade Estadual de Campinas, C.P. 6109, 13083–862 Campinas SP, Brazil
Paulo S. Oliveira*
Affiliation:
Departamento de Biologia Animal, Universidade Estadual de Campinas, 13083-862, Campinas SP, Brazil
*
2Corresponding author. Email: pso@unicamp.br
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Abstract:

Odontomachus chelifer ants collect fallen arillate seeds of Cabralea canjerana (Meliaceae), a bird-dispersed tree of the Atlantic rain forest. In the nest the larvae are fed with the lipid-rich aril, and the viable seed is discarded. Benefits from secondary seed dispersal by ants are well documented for tropical plants, but benefits to ants from consuming vertebrate-dispersed diaspores are uncertain. Twelve captive colonies of O. chelifer were used to investigate the effect of aril consumption on larval development. Treatment colonies were supplemented with 1 g of C. canjerana arils, whereas control colonies were supplemented with 1 g of synthetic diet. Egg and larval production did not differ between experimental colonies after 5 mo. Aril-fed larvae, however, grew 3.5 times larger than those in control colonies. Essential fatty acids in the arils possibly account for improved larval development. Consumption of lipid-rich arils may be critical under scarcity of arthropod prey. Improved larval development through aril consumption confirms that this ant-seed interaction is facultatively mutualistic. This result is meaningful given the predominantly carnivorous diet of O. chelifer, and the generalized nature of ant-seed/fruit interactions in tropical forests. Whether or not benefits to larvae translate into significant gains for ant colonies is uncertain.

Keywords

ant-plant interactionAtlantic rain forestCabralea canjeranaFormicidaefrugivoryMeliaceaemutualismseed dispersal
Type
Short Communication
Information
Journal of Tropical Ecology , Volume 30 , Issue 6 , November 2014 , pp. 621 - 624
Copyright
Copyright © Cambridge University Press 2014 

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