Partitioning of reproduction among queens in the Argentine ant, Linepithema humile

We investigated how queens share parentage (skew) in the Argentine ant, Linepithema humile, a social insect with multiple queens (polygyny). Overall, maternity of 546 male and female sexuals that mated successfully was determined with microsatellites in 26 colonies consisting of two queens and workers. The first main finding was that queens all contributed to sexual production. However, there was a significant departure from equal contribution to male and female sexual production in a notable proportion of colonies. Overall, reproductive skew for sexual (male and female) production was relatively low but higher than reproductive skew for egg production. The second interesting result was that there was a trade-off in the relative contribution of queens to male and female production. The queens contributing more to male production contributed significantly less to female sexual production. Finally, there was no significant association between colony productivity and the degree of reproductive skew. The relatively low reproductive skew is in line with predictions of the so-called concession models of reproductive skew because, in the Argentine ant, relatedness between queens is low and ecological constraints on dispersal nonexistent or weak. © 2001 The Association for the Study of Animal Behaviour.

Biological parameters and glomalin levels as quality indicators in a soil implanted with exotic forest species in Argentine Patagonia

p.83-88

Fertilization trial on soybean in Argentine Pampa : boron or nitrogen?

p.29-36

Sulfur fertilization technology in the Argentine Pampas Region : a review

p.61-73

Fertilization trial on soybean in Argentine Pampa : boron or nitrogen?

p.29-36

Sulfur fertilization technology in the Argentine Pampas Region : a review

p.61-73

Exploiting local controversy: regional British censorship of Last Tango in Paris (1972)

This article explores local authority responses to the cinematic release of Last Tango in Paris in Britain. Using a range of archival material from the BBFC, the National Archives and the Public Records Office of Northern Ireland, it offers a detailed, comparative case study of three different locations; Belfast, Newport and Oxford. It argues that comparing local censorship decisions with the national decisions of the BBFC offer little in the way of regional nuance. In order to effectively understand the workings of local censorship, a deeper understanding of local discourses is needed as well as acknowledgement of broader pressure group activity and its impact on the local picture, such as that of the National Festival of Light.

De on tango street a tango nas ruas: explorando a fanfiction e a autotradução na tliteratura da geração da internet

Tese de Mestrado Tradução e Interpretação Especializadas Joana Santos Nazaré Orientador: Professora Doutora Manuela Veloso Instituto de Contabilidade e Administração

Um tango com Gardel

Dissertação submetida à Escola Superior de Teatro e Cinema para cumprimento dos requisitos necessários à obtenção do grau de Mestre em Teatro - especialização em Artes Performativas – vertente Teatro-Música.

Kin structure and queen execution in the Argentine ant Linepithema humile

Every spring, workers of the Argentine Ant Linepithema humile kill a large proportion of queens within their nests, Although this behaviour inflicts a high energetic cost oil the colonies, its biological significance has remained elusive so far. An earlier study showed that the probability of a queen being executed is not related to her weight, fecundity, or age. Here we test the hypothesis that workers collectively eliminate queens to which they are less related, thereby increasing their inclusive fitness. We found no evidence for this hypothesis. Workers of a nest were on average not significantly less related to executed queens than to surviving ones. Moreover, a population genetic analysis revealed that workers were not genetically differentiated between nests. This means that workers of a given nest are equally related to any queen in the population and that there can be no increase in average worker-queen relatedness by selective elimination of queens. Finally, our genetic analyses also showed that, in contrast to workers, queens were significantly genetically differentiated between nests and that there was significant isolation by distance for queens.