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Colony size affects division of labour in the ponerine ant Rhytidoponera metallica
Investigation of differences in task specialisation between large and small colonies of the ponerine ant Rhytidoponera metallica found that workers in small colonies have a lower contact rate between nestmates and a greater variability in time between contacts than workers from large colonies.
Detection of female mating status using chemical signals and cues
- M. Thomas
- Biology, PsychologyBiological reviews of the Cambridge Philosophical…
- 1 February 2011
Evidence that chemical cues and signals are used widely by males to discriminate between mated and unmated females is reviewed, and the mechanisms by which female odour changes post‐mating are explored.
Male Crickets Adjust the Viability of Their Sperm in Response to Female Mating Status
Examining sperm allocation in the Australian field cricket Teleogryllus oceanicus finds that male crickets adjust their ejaculates in response to female mating status, and shows that variation in ejaculate quality can be an important aspect of strategic ejaculation by males.
Female preferences for acoustic and olfactory signals during courtship: Male crickets send multiple messages
It is found that olfactory and acoustic cues had equal weight in predicting the probability of male mating success, and the attractiveness of cuticular hydrocarbon and courtship song attractiveness may help explain the maintenance of genetic variation in these sexual traits.
Male-derived cuticular hydrocarbons signal sperm competition intensity and affect ejaculate expenditure in crickets
It is shown for the first time, to the authors' knowledge, that males can detect different intensities of sperm competition by using distinct chemical cues of individual males present on females, which is mediated via the use of chemical cues.
When supercolonies collide: territorial aggression in an invasive and unicolonial social insect
- M. Thomas, C. M. Payne-Makrisâ, A. Suarez, N. Tsutsui, D. Holway
- Environmental ScienceMolecular ecology
- 14 November 2006
Findings are inconsistent with a model of relaxed ecological constraints leading to colony fusion and suggest that environmentally derived cues are not the prime determined of nestmate recognition in field populations of Argentine ants.
Sexual selection on cuticular hydrocarbons in the Australian field cricket, Teleogryllus oceanicus
Mating success was the only measure of attractiveness that imposed both univariate linear and quadratic selection on cuticular hydrocarbons, which shows that sexual selection plays an important role in the evolution of malecuticular hydrocarbon signals.
Sexual dimorphism in cuticular hydrocarbons of the Australian field cricket Teleogryllus oceanicus (Orthoptera: Gryllidae).
Cuticular hydrocarbons are heritable in the cricket Teleogryllus oceanicus
The results provide evidence that variation in CHC profiles can reflect genetic relatedness, supporting the widely held belief that this phenotypic trait is used as a mechanism for chemosensory kin recognition.
Condition-specific competition between invasive Argentine ants and Australian Iridomyrmex
The findings suggest that physical conditions unsuitable for L. humile may combine with interspecific competition from native ants that are more tolerant to hot, dry conditions to reduce the extent to which natural areas in Australia become invaded.