. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 258 B. J. COLE 0) o |- 06 O O <j) 04 *L_ 3 O LL ~ 02 i 10 15 Colony Size 20 25 _ § | o r 0 C 1 | « ^ 4 8 12 Aggregate Size 16 Figure 1. (A) Data from activity records of the ant Leptutln>rtt.\ «/- larjycei. The number of individuals is given on the abscissa and the power in the first fourier component of the activity record is given on the ordmate. Activity records are at least four hours long. (B) Magnitude of the first fourier component in simulations of the MCA model described in the text
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 258 B. J. COLE 0) o |- 06 O O <j) 04 *L_ 3 O LL ~ 02 i 10 15 Colony Size 20 25 _ § | o r 0 C 1 | « ^ 4 8 12 Aggregate Size 16 Figure 1. (A) Data from activity records of the ant Leptutln>rtt.\ «/- larjycei. The number of individuals is given on the abscissa and the power in the first fourier component of the activity record is given on the ordmate. Activity records are at least four hours long. (B) Magnitude of the first fourier component in simulations of the MCA model described in the text for varying numbers of automata. These figures are adapted from data described by Cole and Cheshire (1945). ('Copyright 2002. The University of Chicago Press. All rights reserved. Used with permission.) each of its neighbors. The details of the model can be found elsewhere (Sole et <//., 1992; Cole and Cheshire, 1995). The rule sets are coded by a matrix that dictates how active or inactive ants influence the activity of their active or inactive neighbors. Since we have two activity states for the ants, there are four terms in this matrix. The first term is the effect that an active ant has on another active ant. A value of 1 indicates that the interaction is allowed, and a value of 0 indicates that the interaction is forbidden. It is convenient to speak of 7, : 1 rules, to indicate that active ants are allowed to influence the activity of other active ants. For example, 74 = 0 rules would indicate that inactive ants are forbidden to influence the activity of inactive ants. Since the four terms of the interaction matrix can be either 0 or 1, there are 16 rule sets that apply to this model. Earlier work (Cole and Cheshire, 1995) showed that if the model follows the rule 7, == 1, then as larger numbers of workers are added to the system, the degree of periodicity of the simulated outcome increases in the same way that ex- perimental results do (Fig. Ib). In other words. 7,
Size: 2098px × 1191px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
