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Chemical ecology and social parasitism in ants.
It is hypothesize that host and parasite are likely to be related chemically, thereby facilitating the necessary mimicry to permit bypassing the colony odor barrier, and discusses evolutionary trends that may have led to social parasitism, focusing on whether slave-making ants and their host species are expected to engage in a coevolutionary arms race. Expand
Individuality and colonial identity in ants: the emergence of the social representation concept
It is hypothesize that the template of colonial identity has evolved from a simple personal chemical reference in primitive species with small colonies to an internal representation of the colonial identity in larger colonies. Expand
Reproduction and Dispersal in the Ant Cataglyphis Cursor (Hymenoptera, Formicidae)
Camponotus fellah colony integration: worker individuality necessitates frequent hydrocarbon exchanges
The results clearly support the existence of a Gestalt colony odour in C. fellah, and show that since individual hydrocarbon production is dynamic, workers are obliged to exchange hydrocarbons continually in order to be in the Gestalt, and properly integrate into the colony. Expand
Epididymis seleno-independent glutathione peroxidase 5 maintains sperm DNA integrity in mice.
- E. Chabory, C. Damon, +12 authors P. Vernet
- Biology, Medicine
- The Journal of clinical investigation
- 1 July 2009
It is suggested that GPX5 is a potent antioxidant scavenger in the luminal compartment of the mouse cauda epididymidis that protects spermatozoa from oxidative injuries that could compromise their integrity and, consequently, embryo viability. Expand
Mammalian glutathione peroxidases control acquisition and maintenance of spermatozoa integrity.
The importance of the GPx protein family in determining the fertilizing potential of mammalian spermatozoa is underlined in the field of mammalian fertility and infertility as well as in the development of assisted medical procreation technologies and male gamete preservation techniques that are extensively used in human and animal reproduction programs. Expand
Fertility signalling and reproductive skew in queenless ants
The fertility signal in queenless ants is compared with the ‘badge of status’ reported in various birds and the evolutionary stability of this communication system is discussed and given special emphasis to ecological constraints and the high degree of intracolonial relatedness typical of social insects. Expand
The evolutionary origin and genomic organization of SINEs in Arabidopsis thaliana.
- A. Lenoir, L. Lavie, +4 authors J. Deragon
- Biology, Medicine
- Molecular biology and evolution
- 1 December 2001
The origin, distribution, organization, and evolutionary history of RAthE1 andRAthE2 elements were studied and compared to the well-characterized SINE S1 element from Brassica and a retroposition partnership between Arabidopsis SINEs and LINEs is proposed. Expand
Reproductive monopoly enforced by sterile police workers in a queenless ant
This is the first study that uncouples dominance and fertility in a social insect: it gives a better understanding of the crucial role of sterile helpers in the control of reproductive skew in animal societies. Expand
Comparative dynamics of gestalt odour formation in two ant species Camponotus fellah and Aphaenogaster senilis (Hymenoptera: Formicidae)
In A. senilis, allogrooming was more frequent than in ants that trophallax, which corroborates the role of allog rooming in the establishment of the gestalt in this species. Expand