Learn More
We investigated the influence of juvenile hormones (JH) on the composition of cuticular hydrocarbons (CHCs) and the division of labor in colonies of the African ant Myrmicaria eumenoides. CHCs have long been implicated in nestmate recognition in social insect colonies. In M. eumenoides, the CHC profiles also vary with the task performed from(More)
We generalize the concept of block reduction for lattice bases from the l 2 {norm to arbitrary norms. This extends the results of Schnorr S87, S94]. We give algorithms for block reduction and apply the resulting enumeration concept to solve subset sum problems. The deterministic algorithm solves all subset sum problems. For up to 66 weights it needs in(More)
Several African termite species from different subfamilies and different habitats are sensitive to trail-active extracts or to naturally laid trails from other species. Using single-extract bioassays, it is shown that the response threshold for trail-following is nearly identical for all tested species (except forHodotermes mossambicus). However, when(More)
The paired labial glands are located in all termite species in the thorax. During food exploitation workers of the French termite Reticulitermes santonensis and the African termite Schedorhinotermes lamanianus release the secretion of their labial glands directly onto the food. The secretion carries a water-soluble, heat-resistant, nonvolatile signal that(More)
The labial gland of the French subterranean termite Reticulitermes santonensis De Feytaud contains a polar, heat-resistent, and persistent chemical signal that is released onto the food during food exploitation and stimulates feeding in nestmates. Separation of the labial gland secretion by thin-layer chromatography on cellulose plates revealed that the(More)
We propose a fast variant of the Gaussian algorithm for the reduction of two{ dimensional lattices for the l 1 ?; l 2 ? and l 1 ?norm. The algorithm runs in at most O(n M(B) log B) bit operations for the l 1 ?norm and in O(n logn M(B) log B) bit operations for the l 1 ? and l 2 ?norm on input vectors a; b 2 Z Z n with norm at most 2 B where M(B) is a time(More)
  • 1