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Distribution, Population Structure and Habitat Use of Microcebus berthae Compared to Those of Other Sympatric Cheirogalids

We aimed to identify the geographical and biotic limitations of Microcebus berthae, the smallest extant primate. Furthermore we analyzed the mating system of two local populations and their habitat use in relation to microhabitat structures and to those of Microcebus murinus and Cheirogaleus medius,... Full description

Journal Title: International journal of primatology 2004, Vol.25 (2), p.307-330
Main Author: SCHWAB, Dorothea
Other Authors: GANZHOM, Jörg U
Format: Electronic Article Electronic Article
Language: English
Subjects:
Publisher: New York, NY: Kluwer Academic/Plenum
ID: ISSN: 0164-0291
Link: http://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=15701984
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title: Distribution, Population Structure and Habitat Use of Microcebus berthae Compared to Those of Other Sympatric Cheirogalids
format: Article
creator:
  • SCHWAB, Dorothea
  • GANZHOM, Jörg U
subjects:
  • Animal and plant ecology
  • Animal populations
  • Animal, plant and microbial ecology
  • Animals
  • Biological and medical sciences
  • Biological anthropology
  • Cheirogaleus medius
  • Comparative analysis
  • Competition
  • Conservation
  • Demecology
  • Demography
  • Distribution
  • Fundamental and applied biological sciences. Psychology
  • Habitats
  • Madagascar
  • Mammalia
  • Mate selection
  • Microcebus berthae
  • Population
  • Primatology
  • Prosimians
  • Vertebrata
ispartof: International journal of primatology, 2004, Vol.25 (2), p.307-330
description: We aimed to identify the geographical and biotic limitations of Microcebus berthae, the smallest extant primate. Furthermore we analyzed the mating system of two local populations and their habitat use in relation to microhabitat structures and to those of Microcebus murinus and Cheirogaleus medius, two potentially competing lemur species. The range of Microcebus berthae is restricted to ≤220 km^sup 2^ in the dry deciduous forest of western Madagascar. A very optimistic estimate of the total population size is ca. 7900 individuals. During a 13-mo mark-recapture study individuals were trapped from May 1995 to May 1996 at permanent trap locations 50 m apart over 2 study areas of ca. 25 ha each. The spacing of trap locations where individuals have been retrapped indicate that males have larger home ranges than those of females, which in concert with multiple intra- and intersexual range overlap indicates a promiscuous mating system. In contrast to the other 2 species, Microcebus berthae maintained specific habitat utilization patterns at 2 sites with different vegetation structures. Their habitat use in relation to vegetation characteristics differed from that of Cheirogaleus medius but not from that of Microcebus murinus. Co-occurrence patterns of Microcebus berthae and M. murinus deviated significantly from random and resembled a checkerboard distribution possibly generated by competitive exclusion. Thus, according to the niche concept, Microcebus berthae seem to be separated from Cheirogaleus medius by differences in food composition and habitat requirements, while they avoid direct competition with M. murinus by spatial separation.[PUBLICATION ABSTRACT]
language: eng
source:
identifier: ISSN: 0164-0291
fulltext: no_fulltext
issn:
  • 0164-0291
  • 1573-8604
url: Link


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titleDistribution, Population Structure and Habitat Use of Microcebus berthae Compared to Those of Other Sympatric Cheirogalids
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descriptionWe aimed to identify the geographical and biotic limitations of Microcebus berthae, the smallest extant primate. Furthermore we analyzed the mating system of two local populations and their habitat use in relation to microhabitat structures and to those of Microcebus murinus and Cheirogaleus medius, two potentially competing lemur species. The range of Microcebus berthae is restricted to ≤220 km^sup 2^ in the dry deciduous forest of western Madagascar. A very optimistic estimate of the total population size is ca. 7900 individuals. During a 13-mo mark-recapture study individuals were trapped from May 1995 to May 1996 at permanent trap locations 50 m apart over 2 study areas of ca. 25 ha each. The spacing of trap locations where individuals have been retrapped indicate that males have larger home ranges than those of females, which in concert with multiple intra- and intersexual range overlap indicates a promiscuous mating system. In contrast to the other 2 species, Microcebus berthae maintained specific habitat utilization patterns at 2 sites with different vegetation structures. Their habitat use in relation to vegetation characteristics differed from that of Cheirogaleus medius but not from that of Microcebus murinus. Co-occurrence patterns of Microcebus berthae and M. murinus deviated significantly from random and resembled a checkerboard distribution possibly generated by competitive exclusion. Thus, according to the niche concept, Microcebus berthae seem to be separated from Cheirogaleus medius by differences in food composition and habitat requirements, while they avoid direct competition with M. murinus by spatial separation.[PUBLICATION ABSTRACT]
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subjectAnimal and plant ecology ; Animal populations ; Animal, plant and microbial ecology ; Animals ; Biological and medical sciences ; Biological anthropology ; Cheirogaleus medius ; Comparative analysis ; Competition ; Conservation ; Demecology ; Demography ; Distribution ; Fundamental and applied biological sciences. Psychology ; Habitats ; Madagascar ; Mammalia ; Mate selection ; Microcebus berthae ; Population ; Primatology ; Prosimians ; Vertebrata
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jtitleInternational journal of primatology
date2004
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volume25
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pages307-330
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abstractWe aimed to identify the geographical and biotic limitations of Microcebus berthae, the smallest extant primate. Furthermore we analyzed the mating system of two local populations and their habitat use in relation to microhabitat structures and to those of Microcebus murinus and Cheirogaleus medius, two potentially competing lemur species. The range of Microcebus berthae is restricted to ≤220 km^sup 2^ in the dry deciduous forest of western Madagascar. A very optimistic estimate of the total population size is ca. 7900 individuals. During a 13-mo mark-recapture study individuals were trapped from May 1995 to May 1996 at permanent trap locations 50 m apart over 2 study areas of ca. 25 ha each. The spacing of trap locations where individuals have been retrapped indicate that males have larger home ranges than those of females, which in concert with multiple intra- and intersexual range overlap indicates a promiscuous mating system. In contrast to the other 2 species, Microcebus berthae maintained specific habitat utilization patterns at 2 sites with different vegetation structures. Their habitat use in relation to vegetation characteristics differed from that of Cheirogaleus medius but not from that of Microcebus murinus. Co-occurrence patterns of Microcebus berthae and M. murinus deviated significantly from random and resembled a checkerboard distribution possibly generated by competitive exclusion. Thus, according to the niche concept, Microcebus berthae seem to be separated from Cheirogaleus medius by differences in food composition and habitat requirements, while they avoid direct competition with M. murinus by spatial separation.[PUBLICATION ABSTRACT]
copNew York, NY
pubKluwer Academic/Plenum
doi10.1023/B:IJOP.0000019154.17401.90