Colonization in a pika population: dispersal vs philopatry

Andrew T. Smith, Barbara L. Ivins

Research output: Contribution to journalArticle

75 Citations (Scopus)

Abstract

Relative tendencies toward dispersal or philopatry in a marked population of alpine mammals, the pika (Ochotona princeps), were investigated over a 3-year period in the Rocky Mountains of Colorado. Home range size, distances between centers of activity of dyads, and weighted overlaps of home ranges of dyads were used to define space use patterns. Disappearance and establishment of individuals reflected the temporal component of space use. Social relationships among conspecifics were defined by agonistic and affiliative behaviors. Home ranges of resident adult males and females were of equal size on talus, the obligate habitat of pikas. Adjacent home ranges were normally occupied by members of the opposite sex, and this spacing apparently results from the balance of agonistic and affiliative behaviors exhibited by nearest-neighbor heterosexual pairs. Most juveniles were philopatric. Throughout the summer they remained on their natal home range where they were involved in both agonistic and affiliative behaviors with their mother and putative father. Most animals that established residency were juveniles, and of these almost all settled within 50 m of their natal home range center. This pattern was independent of population density. Immigrants were met with extreme aggression by resident adults that was not balanced by affiliative behaviors. Few immigrants of either sex successflly established on the study area. Adults occasionally changed home ranges, probably to enhance their chances of mating. Intense aggression directed at unfamiliar animals coupled with the acceptance of spatial overlap of related young throughout the summer apparently promote philopatry in pikas. Philopatric settlement in pikas may lead to incestuous matings and contribute to their low intrapopulation genetic variability.

Original languageEnglish (US)
Pages (from-to)37-47
Number of pages11
JournalBehavioral Ecology and Sociobiology
Volume13
Issue number1
DOIs
StatePublished - Jul 1983

Fingerprint

Lagomorpha
Homing Behavior
Ochotonidae
philopatry
home range
affiliative behavior
colonization
Agonistic Behavior
agonistic behavior
Population
space use
aggression
Aggression
immigration
Ochotona
Talus
talus
gender
animal
summer

ASJC Scopus subject areas

  • Behavioral Neuroscience
  • Ecology
  • Animal Science and Zoology

Cite this

Colonization in a pika population : dispersal vs philopatry. / Smith, Andrew T.; Ivins, Barbara L.

In: Behavioral Ecology and Sociobiology, Vol. 13, No. 1, 07.1983, p. 37-47.

Research output: Contribution to journalArticle

Smith, Andrew T. ; Ivins, Barbara L. / Colonization in a pika population : dispersal vs philopatry. In: Behavioral Ecology and Sociobiology. 1983 ; Vol. 13, No. 1. pp. 37-47.
@article{faf519796dbd4f7dab0f1c7f7e524e5f,
title = "Colonization in a pika population: dispersal vs philopatry",
abstract = "Relative tendencies toward dispersal or philopatry in a marked population of alpine mammals, the pika (Ochotona princeps), were investigated over a 3-year period in the Rocky Mountains of Colorado. Home range size, distances between centers of activity of dyads, and weighted overlaps of home ranges of dyads were used to define space use patterns. Disappearance and establishment of individuals reflected the temporal component of space use. Social relationships among conspecifics were defined by agonistic and affiliative behaviors. Home ranges of resident adult males and females were of equal size on talus, the obligate habitat of pikas. Adjacent home ranges were normally occupied by members of the opposite sex, and this spacing apparently results from the balance of agonistic and affiliative behaviors exhibited by nearest-neighbor heterosexual pairs. Most juveniles were philopatric. Throughout the summer they remained on their natal home range where they were involved in both agonistic and affiliative behaviors with their mother and putative father. Most animals that established residency were juveniles, and of these almost all settled within 50 m of their natal home range center. This pattern was independent of population density. Immigrants were met with extreme aggression by resident adults that was not balanced by affiliative behaviors. Few immigrants of either sex successflly established on the study area. Adults occasionally changed home ranges, probably to enhance their chances of mating. Intense aggression directed at unfamiliar animals coupled with the acceptance of spatial overlap of related young throughout the summer apparently promote philopatry in pikas. Philopatric settlement in pikas may lead to incestuous matings and contribute to their low intrapopulation genetic variability.",
author = "Smith, {Andrew T.} and Ivins, {Barbara L.}",
year = "1983",
month = "7",
doi = "10.1007/BF00295074",
language = "English (US)",
volume = "13",
pages = "37--47",
journal = "Behavioral Ecology and Sociobiology",
issn = "0340-5443",
publisher = "Springer Verlag",
number = "1",

}

TY - JOUR

T1 - Colonization in a pika population

T2 - dispersal vs philopatry

AU - Smith, Andrew T.

AU - Ivins, Barbara L.

PY - 1983/7

Y1 - 1983/7

N2 - Relative tendencies toward dispersal or philopatry in a marked population of alpine mammals, the pika (Ochotona princeps), were investigated over a 3-year period in the Rocky Mountains of Colorado. Home range size, distances between centers of activity of dyads, and weighted overlaps of home ranges of dyads were used to define space use patterns. Disappearance and establishment of individuals reflected the temporal component of space use. Social relationships among conspecifics were defined by agonistic and affiliative behaviors. Home ranges of resident adult males and females were of equal size on talus, the obligate habitat of pikas. Adjacent home ranges were normally occupied by members of the opposite sex, and this spacing apparently results from the balance of agonistic and affiliative behaviors exhibited by nearest-neighbor heterosexual pairs. Most juveniles were philopatric. Throughout the summer they remained on their natal home range where they were involved in both agonistic and affiliative behaviors with their mother and putative father. Most animals that established residency were juveniles, and of these almost all settled within 50 m of their natal home range center. This pattern was independent of population density. Immigrants were met with extreme aggression by resident adults that was not balanced by affiliative behaviors. Few immigrants of either sex successflly established on the study area. Adults occasionally changed home ranges, probably to enhance their chances of mating. Intense aggression directed at unfamiliar animals coupled with the acceptance of spatial overlap of related young throughout the summer apparently promote philopatry in pikas. Philopatric settlement in pikas may lead to incestuous matings and contribute to their low intrapopulation genetic variability.

AB - Relative tendencies toward dispersal or philopatry in a marked population of alpine mammals, the pika (Ochotona princeps), were investigated over a 3-year period in the Rocky Mountains of Colorado. Home range size, distances between centers of activity of dyads, and weighted overlaps of home ranges of dyads were used to define space use patterns. Disappearance and establishment of individuals reflected the temporal component of space use. Social relationships among conspecifics were defined by agonistic and affiliative behaviors. Home ranges of resident adult males and females were of equal size on talus, the obligate habitat of pikas. Adjacent home ranges were normally occupied by members of the opposite sex, and this spacing apparently results from the balance of agonistic and affiliative behaviors exhibited by nearest-neighbor heterosexual pairs. Most juveniles were philopatric. Throughout the summer they remained on their natal home range where they were involved in both agonistic and affiliative behaviors with their mother and putative father. Most animals that established residency were juveniles, and of these almost all settled within 50 m of their natal home range center. This pattern was independent of population density. Immigrants were met with extreme aggression by resident adults that was not balanced by affiliative behaviors. Few immigrants of either sex successflly established on the study area. Adults occasionally changed home ranges, probably to enhance their chances of mating. Intense aggression directed at unfamiliar animals coupled with the acceptance of spatial overlap of related young throughout the summer apparently promote philopatry in pikas. Philopatric settlement in pikas may lead to incestuous matings and contribute to their low intrapopulation genetic variability.

UR - http://www.scopus.com/inward/record.url?scp=0002644464&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0002644464&partnerID=8YFLogxK

U2 - 10.1007/BF00295074

DO - 10.1007/BF00295074

M3 - Article

AN - SCOPUS:0002644464

VL - 13

SP - 37

EP - 47

JO - Behavioral Ecology and Sociobiology

JF - Behavioral Ecology and Sociobiology

SN - 0340-5443

IS - 1

ER -