Local Regulation of Trail Networks of the Arboreal Turtle Ant, Cephalotes goniodontus.
Am Nat
; 190(6): E156-E169, 2017 12.
Article
em En
| MEDLINE
| ID: mdl-29166159
ABSTRACT
This study examines how an arboreal ant colony maintains, extends, and repairs its network of foraging trails and nests, built on a network of vegetation. Nodes are junctions where a branch forks off from another or where a branch of one plant touching another provides a new edge on which ants could travel. The ants' choice of edge at a node appears to be reinforced by trail pheromone. Ongoing pruning of the network tends to eliminate cycles and minimize the number of nodes and thus decision points, but not the distance traveled. At junctions, trails tend to stay on the same plant. In combination with the long internode lengths of the branches of vines in the tropical dry forest, this facilitates travel to food sources at the canopy edge. Exploration, when ants leave the trail on an edge that is not being used, makes both search and repair possible. The fewer the junctions between a location and the main trail, the more likely the ants are to arrive there. Ruptured trails are rapidly repaired with a new path, apparently using breadth-first search. The regulation of the network promotes its resilience and continuity.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Formigas
/
Comportamento Alimentar
/
Atividade Motora
Tipo de estudo:
Prognostic_studies
Limite:
Animals
Idioma:
En
Revista:
Am Nat
Ano de publicação:
2017
Tipo de documento:
Article