Category: Uncategorized

SELECTION AT THE SOCIAL LEVEL. "The “superorganism” is more than a heuristic metaphor (e.g., queens are the colony’s ovaries and workers its soma) but that colonies indeed are organisms comprised of organisms that undergo selection as a single entity at a level above that of gene and individual." https://lnkd.in/dS_w2bD View in LinkedIn

BEST FIT FOR SALESMAN PROBLEM. "It is important to note that this ant-based method is effective for finding short routes but not necessarily the shortest one. Nevertheless, such near-optimal solutions are often more than adequate, particularly because obtaining the best route can require an unwieldy amount of computation." https://lnkd.in/dDUTsM2 View in LinkedIn

ANT SALESMAN. "Envision a colony of such ants, each independently hopping from city to city, favoring nearby locations but otherwise traveling randomly. After completing a tour of all the cities, an ant goes back to the links it used and deposits pheromone. The amount of the chemical is inversely proportional to the overall length of the tour: the shorter the distance, the more pheromone each of the links receives." https://lnkd.in/dDUTsM2 View in LinkedIn

TRAVELING SALESMAN PROBLEM: "a person must find the shortest route by which to visit a given number of cities, each exactly once ... For just 15 cities, there are billions of route possibilities." https://scholar.google.es/scholar?q=swarm+cognition+in+insects+and+pheromones&btnG=&hl=en&as_sdt=0,5 View in LinkedIn

NEGATIVE CHEMICAL SIGNALS. "The use of negative pheromones has already been reported in social insects: honeybee and bumble-bee foragers, for example, mark recently visited, exhausted flowers with chemicals that repel other foragers until nectar has been replenished." https://lnkd.in/d5UvDeJ View in LinkedIn

TANDEM RUNNING. "Certain ants find new nest sites by individuals signaling new sites by a timed running motion, where longer times indicate greater uncertainty. As more ants inspect the candidate sites, a quorum is reached to make the group decision to move, despite not all the ants will have inspected all the sites." http://en.m.wikipedia.org/wiki/Quorum_sensing View in LinkedIn

QUORUM DECISIONS. "When its nest is damaged, a colony of the ant ... skillfully emigrates to the best available new site ... the quorum requirement can help a colony choose the best available site, even when few ants have the opportunity to compare sites directly." https://lnkd.in/dK2Sn4M View in LinkedIn

MUTATIONS AND SOCIABILITY. "Krieger and Ross (2002) recently identified for the first time a gene that determines a complex social behaviour, illustrating that simple nucleotide mutations can strongly influence sociality. They showed that allelic differences in the gene Gp-9 in the fire ant Solenopsis invicta determine whether a colony will be single- or multi-queened." https://lnkd.in/d42MTRa View in LinkedIn

MOLECULAR EVOLUTION. "Whether a high rate of molecular evolution is a cause or consequence of sociality, it will certainly give rise to the evolution of new genes or new gene functions through gene duplication, single nucleotide substitutions, insertions or deletions. There is already evidence for this as some conserved genes have novel functions in social animals." https://lnkd.in/d42MTRa View in LinkedIn

RECOMBINATION RATES. "High rates of molecular evolution may have driven social evolution. The honeybee ... has a very high recombination rate and exhibits great colony-level genetic diversity, whilst more primitively-eusocial species ... and solitary species ... have much lower recombination rates ... these data suggest that social complexity and recombination rates are positively correlated." https://lnkd.in/d42MTRa View in LinkedIn