Expanded home ranges in a peripheral population: Space use by endangered Mt. Graham red squirrels

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Peripheral populations are often of increased conservation value; however, knowledge of the ecological and evolutionary consequences of a peripheral location is poor. Spatial dynamics are often interpreted as strategies to maximize access to fitness-limiting resources. Red squirrels Tamiasciurus hudsonicus are territorial in western portions of their range and exhibit overlapping home ranges in eastern forests. Endangered Mt. Graham red squirrels T. hudsonicus grahamensis represent southernmost extension of the species. We used radiotelemetry to assess space use and interindividual overlap of endangered Mt. Graham red squirrels. Squirrels maintained nearly exclusive 50 % core areas; however, 95 % ranges overlapped considerably, especially between males and females. Home ranges increased in summer for both males and females and may be related to sex-specific reproductive strategies. Ranges of Mt. Graham red squirrels in this peripheral population were nearly 10 times the size of red squirrels from other locations. The space use of this limital population suggests that resource availability may be substantially different than in other portions of the range.

Original languageEnglish (US)
Pages (from-to)227-232
Number of pages6
JournalEndangered Species Research
Volume4
Issue number1-2
DOIs
StatePublished - Dec 21 2008

Fingerprint

space use
home range
radiotelemetry
resource availability
reproductive strategy
fitness
summer
resource

Keywords

  • Arizona
  • Conservation
  • Geographic range
  • Isolation
  • Limital population
  • Tamiasciurus hudsonicus

ASJC Scopus subject areas

  • Nature and Landscape Conservation
  • Ecology

Cite this

Expanded home ranges in a peripheral population : Space use by endangered Mt. Graham red squirrels. / Koprowski, John; King, Sarah R B; Merrick, Melissa J.

In: Endangered Species Research, Vol. 4, No. 1-2, 21.12.2008, p. 227-232.

Research output: Contribution to journalArticle

@article{4b431a7d0ba243c3babad71759c3e09c,
title = "Expanded home ranges in a peripheral population: Space use by endangered Mt. Graham red squirrels",
abstract = "Peripheral populations are often of increased conservation value; however, knowledge of the ecological and evolutionary consequences of a peripheral location is poor. Spatial dynamics are often interpreted as strategies to maximize access to fitness-limiting resources. Red squirrels Tamiasciurus hudsonicus are territorial in western portions of their range and exhibit overlapping home ranges in eastern forests. Endangered Mt. Graham red squirrels T. hudsonicus grahamensis represent southernmost extension of the species. We used radiotelemetry to assess space use and interindividual overlap of endangered Mt. Graham red squirrels. Squirrels maintained nearly exclusive 50 {\%} core areas; however, 95 {\%} ranges overlapped considerably, especially between males and females. Home ranges increased in summer for both males and females and may be related to sex-specific reproductive strategies. Ranges of Mt. Graham red squirrels in this peripheral population were nearly 10 times the size of red squirrels from other locations. The space use of this limital population suggests that resource availability may be substantially different than in other portions of the range.",
keywords = "Arizona, Conservation, Geographic range, Isolation, Limital population, Tamiasciurus hudsonicus",
author = "John Koprowski and King, {Sarah R B} and Merrick, {Melissa J}",
year = "2008",
month = "12",
day = "21",
doi = "10.3354/esr00026",
language = "English (US)",
volume = "4",
pages = "227--232",
journal = "Endangered Species Research",
issn = "1863-5407",
publisher = "Inter-Research",
number = "1-2",

}

TY - JOUR

T1 - Expanded home ranges in a peripheral population

T2 - Space use by endangered Mt. Graham red squirrels

AU - Koprowski, John

AU - King, Sarah R B

AU - Merrick, Melissa J

PY - 2008/12/21

Y1 - 2008/12/21

N2 - Peripheral populations are often of increased conservation value; however, knowledge of the ecological and evolutionary consequences of a peripheral location is poor. Spatial dynamics are often interpreted as strategies to maximize access to fitness-limiting resources. Red squirrels Tamiasciurus hudsonicus are territorial in western portions of their range and exhibit overlapping home ranges in eastern forests. Endangered Mt. Graham red squirrels T. hudsonicus grahamensis represent southernmost extension of the species. We used radiotelemetry to assess space use and interindividual overlap of endangered Mt. Graham red squirrels. Squirrels maintained nearly exclusive 50 % core areas; however, 95 % ranges overlapped considerably, especially between males and females. Home ranges increased in summer for both males and females and may be related to sex-specific reproductive strategies. Ranges of Mt. Graham red squirrels in this peripheral population were nearly 10 times the size of red squirrels from other locations. The space use of this limital population suggests that resource availability may be substantially different than in other portions of the range.

AB - Peripheral populations are often of increased conservation value; however, knowledge of the ecological and evolutionary consequences of a peripheral location is poor. Spatial dynamics are often interpreted as strategies to maximize access to fitness-limiting resources. Red squirrels Tamiasciurus hudsonicus are territorial in western portions of their range and exhibit overlapping home ranges in eastern forests. Endangered Mt. Graham red squirrels T. hudsonicus grahamensis represent southernmost extension of the species. We used radiotelemetry to assess space use and interindividual overlap of endangered Mt. Graham red squirrels. Squirrels maintained nearly exclusive 50 % core areas; however, 95 % ranges overlapped considerably, especially between males and females. Home ranges increased in summer for both males and females and may be related to sex-specific reproductive strategies. Ranges of Mt. Graham red squirrels in this peripheral population were nearly 10 times the size of red squirrels from other locations. The space use of this limital population suggests that resource availability may be substantially different than in other portions of the range.

KW - Arizona

KW - Conservation

KW - Geographic range

KW - Isolation

KW - Limital population

KW - Tamiasciurus hudsonicus

UR - http://www.scopus.com/inward/record.url?scp=41049104027&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=41049104027&partnerID=8YFLogxK

U2 - 10.3354/esr00026

DO - 10.3354/esr00026

M3 - Article

AN - SCOPUS:41049104027

VL - 4

SP - 227

EP - 232

JO - Endangered Species Research

JF - Endangered Species Research

SN - 1863-5407

IS - 1-2

ER -