The effects of neighbor familiarity and size on cooperative defense of fiddler crab territories

Isobel Booksmythe, Catherine Hayes, Michael D. Jennions, Patricia R Y Backwell

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Cooperation between neighbors in territory defense is expected when the cost of helping a neighbor is less than that of establishing new boundaries with a successful usurper of a neighboring territory. Cooperation has been documented in 3 species of fiddler crab and is understood to depend strongly on the relative sizes of participants - large residents will help smaller neighbors repel intermediate-sized intruders. Simply meeting these criteria does not, however, guarantee that helping occurs, and additional factors are likely to affect the benefits of providing help. We tested whether the likelihood that a large resident would help his smaller neighbor was affected by neighbor familiarity or the relative size of the smaller neighbor, by replacing neighbors with smaller, larger, or size-matched individuals and then simulating intrusions onto their territories. The likelihood of helping did not differ between familiar and unfamiliar neighbors of the same size, but it decreased when the replacement resident differed in size from the original resident. These results suggest that although residents do not recognize their neighbors individually, size acts as a cue to neighbor identity.

Original languageEnglish
Pages (from-to)285-289
Number of pages5
JournalBehavioral Ecology
Volume23
Issue number2
DOIs
Publication statusPublished - 1 Mar 2012
Externally publishedYes

Keywords

  • cooperative defense
  • familiarity
  • individual recognition
  • neighbor
  • size
  • territory
  • Uca annulipes

Cite this

Booksmythe, Isobel ; Hayes, Catherine ; Jennions, Michael D. ; Backwell, Patricia R Y. / The effects of neighbor familiarity and size on cooperative defense of fiddler crab territories. In: Behavioral Ecology. 2012 ; Vol. 23, No. 2. pp. 285-289.
@article{77f3d034437746ce874796d4988e0aa7,
title = "The effects of neighbor familiarity and size on cooperative defense of fiddler crab territories",
abstract = "Cooperation between neighbors in territory defense is expected when the cost of helping a neighbor is less than that of establishing new boundaries with a successful usurper of a neighboring territory. Cooperation has been documented in 3 species of fiddler crab and is understood to depend strongly on the relative sizes of participants - large residents will help smaller neighbors repel intermediate-sized intruders. Simply meeting these criteria does not, however, guarantee that helping occurs, and additional factors are likely to affect the benefits of providing help. We tested whether the likelihood that a large resident would help his smaller neighbor was affected by neighbor familiarity or the relative size of the smaller neighbor, by replacing neighbors with smaller, larger, or size-matched individuals and then simulating intrusions onto their territories. The likelihood of helping did not differ between familiar and unfamiliar neighbors of the same size, but it decreased when the replacement resident differed in size from the original resident. These results suggest that although residents do not recognize their neighbors individually, size acts as a cue to neighbor identity.",
keywords = "cooperative defense, familiarity, individual recognition, neighbor, size, territory, Uca annulipes",
author = "Isobel Booksmythe and Catherine Hayes and Jennions, {Michael D.} and Backwell, {Patricia R Y}",
year = "2012",
month = "3",
day = "1",
doi = "10.1093/beheco/arr184",
language = "English",
volume = "23",
pages = "285--289",
journal = "Behavioral Ecology",
issn = "1045-2249",
publisher = "Oxford University Press, USA",
number = "2",

}

The effects of neighbor familiarity and size on cooperative defense of fiddler crab territories. / Booksmythe, Isobel; Hayes, Catherine; Jennions, Michael D.; Backwell, Patricia R Y.

In: Behavioral Ecology, Vol. 23, No. 2, 01.03.2012, p. 285-289.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - The effects of neighbor familiarity and size on cooperative defense of fiddler crab territories

AU - Booksmythe, Isobel

AU - Hayes, Catherine

AU - Jennions, Michael D.

AU - Backwell, Patricia R Y

PY - 2012/3/1

Y1 - 2012/3/1

N2 - Cooperation between neighbors in territory defense is expected when the cost of helping a neighbor is less than that of establishing new boundaries with a successful usurper of a neighboring territory. Cooperation has been documented in 3 species of fiddler crab and is understood to depend strongly on the relative sizes of participants - large residents will help smaller neighbors repel intermediate-sized intruders. Simply meeting these criteria does not, however, guarantee that helping occurs, and additional factors are likely to affect the benefits of providing help. We tested whether the likelihood that a large resident would help his smaller neighbor was affected by neighbor familiarity or the relative size of the smaller neighbor, by replacing neighbors with smaller, larger, or size-matched individuals and then simulating intrusions onto their territories. The likelihood of helping did not differ between familiar and unfamiliar neighbors of the same size, but it decreased when the replacement resident differed in size from the original resident. These results suggest that although residents do not recognize their neighbors individually, size acts as a cue to neighbor identity.

AB - Cooperation between neighbors in territory defense is expected when the cost of helping a neighbor is less than that of establishing new boundaries with a successful usurper of a neighboring territory. Cooperation has been documented in 3 species of fiddler crab and is understood to depend strongly on the relative sizes of participants - large residents will help smaller neighbors repel intermediate-sized intruders. Simply meeting these criteria does not, however, guarantee that helping occurs, and additional factors are likely to affect the benefits of providing help. We tested whether the likelihood that a large resident would help his smaller neighbor was affected by neighbor familiarity or the relative size of the smaller neighbor, by replacing neighbors with smaller, larger, or size-matched individuals and then simulating intrusions onto their territories. The likelihood of helping did not differ between familiar and unfamiliar neighbors of the same size, but it decreased when the replacement resident differed in size from the original resident. These results suggest that although residents do not recognize their neighbors individually, size acts as a cue to neighbor identity.

KW - cooperative defense

KW - familiarity

KW - individual recognition

KW - neighbor

KW - size

KW - territory

KW - Uca annulipes

UR - http://www.scopus.com/inward/record.url?scp=84857605842&partnerID=8YFLogxK

U2 - 10.1093/beheco/arr184

DO - 10.1093/beheco/arr184

M3 - Article

VL - 23

SP - 285

EP - 289

JO - Behavioral Ecology

JF - Behavioral Ecology

SN - 1045-2249

IS - 2

ER -