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Behavior of Ants Escaping from a Single-Exit Room.

Wang S, Lv W, Song W - PLoS ONE (2015)

Bottom Line: The ants formed several groups as they moved toward the exit to escape.We measured the time intervals between individual escapes in six versions of the experiment, each containing an exit of a different width, to quantify the movement of the groups.We also investigated the relationship between the number of ants in a group and the group flow rate.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui, China.

ABSTRACT
To study the rules of ant behavior and group-formation phenomena, we examined the behaviors of Camponotus japonicus, a species of large ant, in a range of situations. For these experiments, ants were placed inside a rectangular chamber with a single exit that also contained a filter paper soaked in citronella oil, a powerful repellent. The ants formed several groups as they moved toward the exit to escape. We measured the time intervals between individual escapes in six versions of the experiment, each containing an exit of a different width, to quantify the movement of the groups. As the ants exited the chamber, the time intervals between individual escapes changed and the frequency distribution of the time intervals exhibited exponential decay. We also investigated the relationship between the number of ants in a group and the group flow rate.

No MeSH data available.


Related in: MedlinePlus

Mean QS (N≥3) and Q for all experimental repetitions for the six different exit widths.The six exit widths were 1w (0.5 cm), 2w (1.0 cm), 3w (1.5 cm), 4w (2.0 cm), 5w (2.5 cm), and 6w (3.0 cm). The square and circle represent the mean QS and Q for each exit width, respectively. Similar trends exist between mean QS and d and between Q and d.
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pone.0131784.g008: Mean QS (N≥3) and Q for all experimental repetitions for the six different exit widths.The six exit widths were 1w (0.5 cm), 2w (1.0 cm), 3w (1.5 cm), 4w (2.0 cm), 5w (2.5 cm), and 6w (3.0 cm). The square and circle represent the mean QS and Q for each exit width, respectively. Similar trends exist between mean QS and d and between Q and d.

Mentions: Furthermore, the relationship between mean QS (N≥3) and d is also investigated in Fig 8. A similar trend existed between mean QS (group flow rate) (N≥3) and d and also between Q (mean flow rate) and d. Indeed, the trend was so obvious that in general, mean QS (N≥3) (and also Q) increased with increasing d. However, with the same value of d, the mean flow rate (Q) was clearly smaller than the mean group flow rate (QS) (N≥3).


Behavior of Ants Escaping from a Single-Exit Room.

Wang S, Lv W, Song W - PLoS ONE (2015)

Mean QS (N≥3) and Q for all experimental repetitions for the six different exit widths.The six exit widths were 1w (0.5 cm), 2w (1.0 cm), 3w (1.5 cm), 4w (2.0 cm), 5w (2.5 cm), and 6w (3.0 cm). The square and circle represent the mean QS and Q for each exit width, respectively. Similar trends exist between mean QS and d and between Q and d.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4488427&req=5

pone.0131784.g008: Mean QS (N≥3) and Q for all experimental repetitions for the six different exit widths.The six exit widths were 1w (0.5 cm), 2w (1.0 cm), 3w (1.5 cm), 4w (2.0 cm), 5w (2.5 cm), and 6w (3.0 cm). The square and circle represent the mean QS and Q for each exit width, respectively. Similar trends exist between mean QS and d and between Q and d.
Mentions: Furthermore, the relationship between mean QS (N≥3) and d is also investigated in Fig 8. A similar trend existed between mean QS (group flow rate) (N≥3) and d and also between Q (mean flow rate) and d. Indeed, the trend was so obvious that in general, mean QS (N≥3) (and also Q) increased with increasing d. However, with the same value of d, the mean flow rate (Q) was clearly smaller than the mean group flow rate (QS) (N≥3).

Bottom Line: The ants formed several groups as they moved toward the exit to escape.We measured the time intervals between individual escapes in six versions of the experiment, each containing an exit of a different width, to quantify the movement of the groups.We also investigated the relationship between the number of ants in a group and the group flow rate.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui, China.

ABSTRACT
To study the rules of ant behavior and group-formation phenomena, we examined the behaviors of Camponotus japonicus, a species of large ant, in a range of situations. For these experiments, ants were placed inside a rectangular chamber with a single exit that also contained a filter paper soaked in citronella oil, a powerful repellent. The ants formed several groups as they moved toward the exit to escape. We measured the time intervals between individual escapes in six versions of the experiment, each containing an exit of a different width, to quantify the movement of the groups. As the ants exited the chamber, the time intervals between individual escapes changed and the frequency distribution of the time intervals exhibited exponential decay. We also investigated the relationship between the number of ants in a group and the group flow rate.

No MeSH data available.


Related in: MedlinePlus