Diploid male production — a significant colony mortality factor in the fire ant Solenopsis invicta (Hymenoptera: Formicidae)

  title={Diploid male production — a significant colony mortality factor in the fire ant Solenopsis invicta (Hymenoptera: Formicidae)},
  author={Kenneth G. Ross and David J. C. Fletcher},
  journal={Behavioral Ecology and Sociobiology},
SummaryTwo forms of the fire ant, Solenopsis invicta, occur in North America; the monogyne form has colonies with a single functional queen while the polygyne form has colonies containing many functional queens. Field surveys indicate that diploid males are common in natural populations of the polygyne form but absent from monogyne populations, in contrast to laboratory data showing that similar frequencies of queens producing such males occur in the two types of populations. Our results show… 

Selective Male Mortality in the Red Imported Fire Ant, Solenopsis invicta

The bb genotype, rather than an obligate, developmental lethal, was present in some queens and common in alates, workers, and brood, suggesting some frequency of multiple mating in polygyne populations of Solenopsis invicta.

Sympatry of Polygyne and Monogyne Colonies of the Fire Ant Solenopsis invicta (Hymenoptera: Formicidae)

Thepolygyne region in northcentral Florida is more accurately described as an area where relatively high frequencies of polygyne colonies are interdispersed with single queen colonies.

Strategies of the invasive tropical fire ant (Solenopsis geminata) to minimize inbreeding costs

Investigating how inbreeding affects colony founding and potential strategies to overcome its effects in the invasive tropical fire ant, Solenopsis geminata revealed that pleometrosis and cannibalism of diploid male larvae represent strategies through which invasive ants can successfully establish despite high inbreeding.

Impacts of inbreeding on bumblebee colony fitness under field conditions

It is suggested that diploid males may act as indicators of the genetic health of populations, and that their detection could be used as an informative tool in hymenopteran conservation.

Sex determination meltdown upon biological control introduction of the parasitoid Cotesia rubecula?

It is observed that diploid males occur at a relatively high rate in a field population of Cotesia rubecula in Minnesota, USA, where this parasitoid was introduced for biological control of the cabbage white Pieris rapae, and the possibility of a sex determination meltdown from two‐locus CSD to effective single‐locate CSD during or after introduction is discussed.

Diploid male production in a rare and locally distributed bumblebee, Bombus florilegus (Hymenoptera, Apidae)

The results suggest that conservation of the Japanese B. florilegus is required in order to protect it from both habitat destruction and the naturalization of alien species.

The evolution of polyandry by queens in social Hymenoptera: the significance of the timing of removal of diploid males

  • F. Ratnieks
  • Biology
    Behavioral Ecology and Sociobiology
  • 2004
It is suggested that the timing of diploid male removal may influence mating frequency, with early removal of diplant males favoring multiple mating and late removal ofdiploid males favoring single mating.

Effects of ploidy and sex-locus genotype on gene expression patterns in the fire ant Solenopsis invicta

The finding that ploidy level effects on early gene expression override sex effects may explain diploid male sterility and lack of worker discrimination against them during development.

Similar Performance of Diploid and Haploid Males in an Ant Species without Inbreeding Avoidance

The lack of inbreeding avoidance led to frequent sib-mating sof wingless sexuals, which in turn resulted in the regular production of diploid males, which are able to sire sterile triploid offspring.

Sib‐mating in the ant Plagiolepis pygmaea: adaptative inbreeding?

The data show that workers actively repel unrelated males entering their colony, and that queens preferentially mate with related males, consistent with inclusive fitness being a driving force for inbreeding: by preventing outbreeding, workers reduce erosion of relatedness within colonies due to polygyny and polyandry.



Queen number and the production of sexuals in the fire ant, Solenopsis invicta (Hymenoptera: Formicidae)

The timing of the appearance of sexual forms following colony division suggests that queen control may be pheromonally mediated and inhibits the growth of sexuals late in larval development, and that once individual larvae develop beyond a critical point they are no longer subject to queen control.


Three hypotheses are proposed, based on current knowledge of sex‐determining mechanisms in the Hymenoptera, to explain the loss of genetic diversity associated with high rates of diploid male production in S. invicta: allelic diversity was reduced during colonization of North America by a small founder group, genetic structuring of polygyne populations due to local inbreeding caused reduced allelic Diversity and/or increased homozygosity.

Effect of queen number on the production of sexuals in natural populations of the fire ant, Solenopsis invicta

The negative relationship between queen number and number ofSexuals provides evidence that queen control over the production of sexuals, previously established in laboratory experiments, also occurs under natural conditions.

Comparative study of genetic and social structure in two forms of the fire ant Solenopsis invicta (Hymenoptera: Formicidae)

The results do not support the view that kin selection has promoted the evolution of polygyny in North American S. invicta, but mutualism appears to be the most likely selective factor mediating queen associations in this ant.

Monogyny and Polygyny in the Fire Ant, Solenopsis invicta

All the queens of the 15 polygynous colonies were less physogastric than queens of monogynous colonies, and individually they laid far fewer eggs, but collectively they produced a significantly greater number of eggs per colony.

Colony founding by pleometrosis in the fire ant, Solenopsis invicta

A mechanism is proposed in which the central causal factor regulating Pleometrosis is local queen density, local being one to a few square meters, and a variety of factors affect pleometrosis by their action upon the local queendensity.

Colony founding in Myrmecocystus mimicus wheeler (Hymenoptera: Formicidae) and the evolution of foundress associations

It is concluded that competition among founding nests favors foundress associations and that inter-colony raiding is a natural consequence of aggregated pleometrotic founding nests.

Growth and Development of Colonies of the Red Imported Fire Ant, Solenopsis invicta

A study of new colonies of Solenopsis invicta Buren showed that from their inception in early May until fall when weather stops development, the colonies had grown from a single queen and 15–20

Production and Flight of Alate Red Imported Fire Ants

Emergence of alate Solenopsis invicta Buren from several habitats in northern Florida averaged 187,000/acre/year, and first flights composed of alates which developed from the new season's brood occurred in late April and early May.