Dual mechanism of queen influence over sex ratio in the ant Pheidole pallidula
نویسندگان
چکیده
منابع مشابه
Social Task Regulation in the Dimorphic Ant, Pheidole pallidula: the Influence of Caste Ratio
We investigated whether the physical castes of the dimorphic ant Pheidole pallidula (Nylander) (Hymenoptera: Formicidae), are involved in determining within-nest activities and how their social investment in everyday tasks is influenced by large changes in the colony's caste ratio. Although the large-headed majors are morphologically distinct from minors, they are similar in size, exhibit simil...
متن کاملSignificant reproductive skew in the facultatively polygynous ant Pheidole pallidula.
Reproductive skew - the extent to which reproduction is unevenly shared between individuals in a social group - varies greatly between and within animal species. In this study, we investigated how queens share parentage in polygynous (multiple queen) colonies of the Mediterranean ant Pheidole pallidula. We used highly polymorphic microsatellites markers to determine parentage of gynes (new quee...
متن کاملColony sex ratios in the facultatively polygynous ant Pheidole pallidula: a reanalysis with new data.
A recent study by Fournier et al. (2003) provides important new information on sex allocation in the ant Pheidole pallidula, and proposes a new scenario for sex-ratio evolution in P. pallidula and similar species. However, Helms proposed to the authors that two important conclusions of the study were questionable because of potential problems with the analyses. Here we provide new data and a re...
متن کاملInvestigation of the population genetic structure and mating system in the ant Pheidole pallidula.
The origin of eusociality in haplo-diploid organisms such as Hymenoptera has been mostly explained by kin selection. However, several studies have uncovered decreased relatedness values within colonies, resulting primarily from multiple queen matings (polyandry) and/or from the presence of more than one functional queen (polygyny). Here, we report on the use of microsatellite data for the inves...
متن کاملColony sex ratios vary with breeding system but not relatedness asymmetry in the facultatively polygynous ant Pheidole pallidula.
We investigated sex allocation in a Mediterranean population of the facultatively polygynous (multiple queen per colony) ant Pheidole pallidula. This species shows a strong split sex ratio, with most colonies producing almost exclusively a single-sex brood. Our genetic (microsatellite) analyses reveal that P. pallidula has an unusual breeding system, with colonies being headed by a single or a ...
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ژورنال
عنوان ژورنال: Behavioral Ecology and Sociobiology
سال: 2005
ISSN: 0340-5443,1432-0762
DOI: 10.1007/s00265-005-0964-0