Trail-following responses ofTapinoma simrothi (Formicidae: Dolichoderinae) to pygidial gland extracts

SummaryThe pygidial (anal) gland was found to be the source of trail pheromone in the antTapinoma simrothi. Bioassays conducted with fractionated pygidial gland secretion indicated that the fraction containing iridodials and iridomyrmecin is responsible for the trail pheromone activity. Thus workers ofT. simrothi may utilize the same glandular exudate for alarm and trail following. At high emission rates from a point source, the ants responded in alarm, e.g., rushed to the source with open mandibles and raised abdomen. When concentrations were low and drawn as a line, the ants followed the secretion calmly. Trails ofT. simrothi are long-lived, having a biological half-life of 10 to 19 days. Quantitative studies of the evaporation rates of the iridodials by gas chromatography resulted in a half-life of 11 days, agreeing with the biological data. The implications of the use of the same glandular secretion for alarm and food recruitments are discussed.

[1]  C. Emery,et al.  Revision des especes palearctiques du genre Tapinoma. , 1925 .

[2]  E. Wilson,et al.  Glandular Sources and Specificity of Some Chemical Releasers of Social Behavior in Dolichoderine Ants , 1959 .

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

[4]  E. Wilson.  Chemical communication among workers of the fire ant Solenopsis saevissima (Fr. Smith) 2. An information analysis of the odour trail , 1962 .

[5]  R. Silverstein,et al.  Alarm pheromones of the ant atta texana. , 1968, Journal of insect physiology.

[6]  M. Blum,et al.  Alkanones and terpenes in the mandibular glands of Atta species (hymenoptera: formicidae)☆ , 1968 .

[7]  H. R. Hermann,et al.  Venoms and Venom Apparatuses of the Formicidae: Dolichoderinae and Aneuretinae , 1978 .

[8]  P. Howse,et al.  Sociochemicals of Ants , 1984 .

[9]  M. Cammaerts.  Probable functions for a previously unrecognized pheromone in ants of the genus Myrmica , 1984, Behavioural Processes.

[10]  E. Morgan,et al.  Ant trail pheromones , 1985 .

[11]  U. Maschwitz,et al.  Recruitment gland of Leptogenys chinensis , 1977, Naturwissenschaften.

[12]  A. Hefetz,et al.  Identification of new components from anal glands ofTapinoma simrothi pheonicium , 1983, Journal of Chemical Ecology.

[13]  S. Key,et al.  Trail-following responses of the Argentine ant,Iridomyrmex humilis (Mayr), to a synthetic trail pheromone component and analogs , 2004, Journal of Chemical Ecology.

[14]  C. S. Lofgren,et al.  Isolation of the trail recruitment pheromone ofSolenopsis invicta , 1988, Journal of Chemical Ecology.

[15]  N. Davies,et al.  Characterization of aggregation factors and associated compounds from the argentine ant,Iridomyrmex humilis , 1980, Journal of Chemical Ecology.

[16]  N. Davies,et al.  An Argentine ant aggregation factor , 1979, Experientia.

[17]  L. Passera,et al.  Chemistry and functions of exocrine secretions of the antsTapinoma melanocephalum and T. erraticum , 1987, Journal of Chemical Ecology.

[18]  J. Billen.  Morphology and ultrastructure of the abdominal glands in Dolichoderine ants (Hymenoptera, Formicidae) , 2005, Insectes Sociaux.