Molecular systematics of Australian carrion-breeding blowflies (Diptera : Calliphoridae) based on mitochondrial DNA
The application of a molecular-clock approach to the study of the evolutionary divergence of the carrion-breeding blowflies suggests that the speciation of at least the endemic Australian taxa may have been the result of increasing aridification in Australia during the last five million years.
Tug-of-war over reproduction in a social bee
It is shown that increased relatedness between nestmates results in more even reproduction among group members and a greater productivity per individual, in line with predictions of the tug-of-war models.
The superseded female's dilemma: ultimate and proximate factors that influence guarding behaviour of the carpenter bee Xylocopa pubescens
It is found that superseded females remained as guards significantly more often when a nestmate (not necessarily close kin) took over reproductive dominance than when an intruder did so, an indication that guarding behaviour has evolved due to kin selection.
Increased tomato yield through pollination by native Australian Amegilla chlorocyanea (Hymenoptera: Anthophoridae).
Results are comparable with those achieved by bumblebee pollination and demonstrate that A. chlorocyanea is a valid alternative to bumblebees for greenhouse tomato pollination in Australia.
Evolution of sociality in the allodapine bees: a review of sex allocation, ecology and evolution
Australian studies suggest that the evolution of large group size and marked reproductive skew is linked with the need to defend against enemies at the nest, rather than high levels of relatedness, female biased sex allocation or opportunities to rear siblings.
Task allocation and reproductive skew in social mass provisioning carpenter bees in relation to age and size
Although social nesting occurs in both tribes, no morphological castes have evolved and females are totipotent, which makes the tribe as a whole highly suitable to test predictions of reproductive skew models, and strong constraints on solitary nesting coincided with strong skew, the predicted effects of relatedness and group productivity on skew were not found.
Diversity and conservation status of native Australian bees
Australia’s idiosyncratic bee fauna is characterised by a combination of numerous endemic taxa and by the complete absence of some families, and more than half the named taxa are in need of revision.
Native Australian carpenter bees as a potential alternative to introducing bumble bees for tomato pollination in greenhouses
It was investigated whether the native green carpenter bees (Xylocopa (Lestis) could be used as an alternative to bumble bees for tomato pollination and it was shown that Lestis females will visit and buzz pollinate flowers in a greenhouse and that tomatoes grown from Lest is pollinated flowers are on average heavier and contain more seeds than tomatoes that were not pollinated by LestIs.
Evolution of Blind Beetles in Isolated Aquifers: A Test of Alternative Modes of Speciation
- R. Leijs, E. V. van Nes, C. Watts, S. Cooper, W. Humphreys, K. Hogendoorn
- BiologyPLoS ONE
- 30 March 2012
It is shown that it is very unlikely that the high number of sympatrically occurring sister species can be explained by a combination of allopatric evolution and repeated colonisations alone, and diversification has occurred within the aquifers and likely involved sympatric, parapatric and/or microallopatrics speciation.
Life-cycle of Halictus rubicundus christ (Hymenoptera: Halictidae) in the Netherlands: comparison of two populations
Evidence suggests that the shel tered population is bivoltine and possibly social, whereas the exposed population is univol tine, and limited data indicate a female bias in the first brood of the sheltered population, but no, or slight, male bias inThe exposed population.