The effect of colony size and starvation on food flow in the fire ant, Solenopsis invicta (Hymenoptera: Formicidae)

SummaryFood-sharing experiments were performed with laboratory colonies of Solenopsis invicta containing 1000, 10,000, or 20,000 workers and starved for 0, 3, 7, or 14 days. The effect of these variables was measured on the uptake of radioactive sugar water (1 M) by 1% of the colony's workers and on the trophallactic flow of food from these foragers to the remainder of the colony.Patterns of food distribution in small colonies differed significantly from those in larger nests. In 1000-ant nests, small workers more frequently received food than large workers, but in bigger colonies the opposite occurred.Fire ants were adept at distributing sugar water, with food from a few workers rapidly reaching the majority of the colony as foragers donate their crop contents to groups of recipients and these recipients may themselves act as donors.Foragers respond to colony starvation by individually taking up more food and sharing this fluid with a greater proportion of nestmates. Even foragers from satiated colonies can retrieve at least small amounts of liquid.The forager's state of hunger plays an important role in regulating food distribution. In sugar-satiated nests, previously starved foragers are highly successful at passing on labelled sugar whereas prviously fed foragers are not.

[1]  D. I. Wallis The Foraging Behaviour of the Ant, Formica Fusca , 1964 .

[2]  E. Cupp,et al.  Utilization of body reserves for minim brood development by queens of the imported fire ant, Solenopsis invicta , 1976 .

[3]  B. M. Glancey,et al.  Evidence of a Replete Caste in the Fire Ant Solenopsis invicta , 1973 .

[4]  T. Eisner,et al.  Quantitative studies of liquid food transmission in ants , 1957, Insectes Sociaux.

[5]  B. Vinson The Distribution of an Oil, Carbohydrate, and Protein Food Source to Members of the Imported Fire Ant Colony , 1968 .

[6]  E. Wilson Chemical communication among workers of the fire ant Solenopsis saevissima (Fr. Smith) 1. The Organization of Mass-Foraging , 1962 .

[7]  H. L. Collins,et al.  Growth and Development of Colonies of the Red Imported Fire Ant, Solenopsis invicta , 1973 .

[8]  G. Markin Food distribution within laboratory colonies of the argentine ant,Tridomyrmex humilis (Mayr) , 1970, Insectes Sociaux.

[9]  D. I. Wallis Food-Sharing Behaviour of the Ants Formica Sanguinea and Formica Fusca , 1961 .

[10]  J. H. Sudd Communication and recruitment in pharaoh's ant, Monomorium pharaonis (L.) , 1957 .

[11]  R. Petralia,et al.  Feeding in the Larvae of the Imported Fire Ant, Solenopsis invicta: Behavior and Morphological Adaptations , 1978 .

[12]  E. Wilson,et al.  Division of labor in fire ants based on physical castes (Hymenoptera: Formicidae: Solenopsis). , 1978 .

[13]  P. Schneider Versuche zur frage der individuellen futterverteilung bei der kleinen roten Waldameise (Formica polyctena Foerst.) , 1972, Insectes Sociaux.

[14]  W. Kloft,et al.  Tracer experiments on food exchange in ants and termites , 1963 .

[15]  J. H. Sudd,et al.  An Introduction to the Behaviour of Ants , 1967 .

[16]  Schneider Versuche zur Frage der Futterverteilung und Wasseraufnahme beiFormica polyctena (Först.) , 1966, Insectes Sociaux.

[17]  A. Olive,et al.  Food Habits of the Imported Fire Ant in Pasture and Pine Forest Areas in Southeastern Louisiana , 1969 .

[18]  E. Wilson The Insect Societies , 1974 .

[19]  Hiltrud Naarmann Untersuchungen über Bildung und Weitergabe von Drüsensekreten beiFormica (Hymenopt. Formicidae) mit Hilfe der Radioisotopenmethode , 1963, Experientia.

[20]  S. B. Hays,et al.  Food Habits of Solenopsis saevissima richteri Forel , 1959 .