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Characteristics of Dispersing Pampean Grassland Mice ( Akodon azarae ) in Agroecosystems of Central Argentina.

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Title: Characteristics of Dispersing Pampean Grassland Mice ( Akodon azarae ) in Agroecosystems of Central Argentina.
Authors: Cittadino, Emilio A., Bilenca, David N., Busch, María, Kravetz, Fernando O.
Source: Studies on Neotropical Fauna & Environment. Apr2002, Vol. 37 Issue 1, p1. 7p. 1 Diagram, 4 Charts, 4 Graphs.
Subjects: Akodon, Biotic communities, Reproduction
Geographic Terms: Argentina
Abstract: We studied the characteristics of dispersing Akodon azarae inagroecosystems of central Argentina. The landscape of the study area consistsof cropfields surrounded by weedy margins, which provide good quality habitatfor A. azarae . We sampled six times between June 1991 and May 1993.We defined a central area (center) where all A. azarae were removed,while capture-mark-release trapping was conducted in the adjacent areas (laterals).Individuals were characterized as residents if they did not change their homerange between trapping sessions, or colonizing dispersers if they changedtheir home range and colonized the centers. We compared dispersers and residentswith respect to sex ratio, proportion of reproductively active individuals,body length and weight. In general, residents were larger than dispersersbut they did not differ with respect to reproductive activity and sex ratio.Differences were greater for females in the reproductive period and for malesin the nonreproductive period, suggesting that during reproductive periodsmaller females of lower competitive ability may disperse to obtain a territoryand reproduce, while male dispersal in the nonreproductive period would benon adaptive because the smaller male dispersers have low chance of survivalin an impoverished habitat with high rodent density. [ABSTRACT FROM AUTHOR]
Copyright of Studies on Neotropical Fauna & Environment is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 6612798
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Label: Title
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  Data: Characteristics of Dispersing Pampean Grassland Mice ( Akodon azarae ) in Agroecosystems of Central Argentina.
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  Data: <searchLink fieldCode="AR" term="%22Cittadino%2C+Emilio+A%2E%22">Cittadino, Emilio A.</searchLink><br /><searchLink fieldCode="AR" term="%22Bilenca%2C+David+N%2E%22">Bilenca, David N.</searchLink><br /><searchLink fieldCode="AR" term="%22Busch%2C+María%22">Busch, María</searchLink><br /><searchLink fieldCode="AR" term="%22Kravetz%2C+Fernando+O%2E%22">Kravetz, Fernando O.</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Studies+on+Neotropical+Fauna+%26+Environment%22">Studies on Neotropical Fauna & Environment</searchLink>. Apr2002, Vol. 37 Issue 1, p1. 7p. 1 Diagram, 4 Charts, 4 Graphs.
– Name: Subject
  Label: Subjects
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  Data: <searchLink fieldCode="DE" term="%22Akodon%22">Akodon</searchLink><br /><searchLink fieldCode="DE" term="%22Biotic+communities%22">Biotic communities</searchLink><br /><searchLink fieldCode="DE" term="%22Reproduction%22">Reproduction</searchLink>
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  Data: <searchLink fieldCode="DE" term="%22Argentina%22">Argentina</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: We studied the characteristics of dispersing Akodon azarae inagroecosystems of central Argentina. The landscape of the study area consistsof cropfields surrounded by weedy margins, which provide good quality habitatfor A. azarae . We sampled six times between June 1991 and May 1993.We defined a central area (center) where all A. azarae were removed,while capture-mark-release trapping was conducted in the adjacent areas (laterals).Individuals were characterized as residents if they did not change their homerange between trapping sessions, or colonizing dispersers if they changedtheir home range and colonized the centers. We compared dispersers and residentswith respect to sex ratio, proportion of reproductively active individuals,body length and weight. In general, residents were larger than dispersersbut they did not differ with respect to reproductive activity and sex ratio.Differences were greater for females in the reproductive period and for malesin the nonreproductive period, suggesting that during reproductive periodsmaller females of lower competitive ability may disperse to obtain a territoryand reproduce, while male dispersal in the nonreproductive period would benon adaptive because the smaller male dispersers have low chance of survivalin an impoverished habitat with high rodent density. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Studies on Neotropical Fauna & Environment is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1076/snfe.37.1.1.2110
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 7
        StartPage: 1
    Subjects:
      – SubjectFull: Akodon
        Type: general
      – SubjectFull: Biotic communities
        Type: general
      – SubjectFull: Reproduction
        Type: general
      – SubjectFull: Argentina
        Type: general
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      – TitleFull: Characteristics of Dispersing Pampean Grassland Mice ( Akodon azarae ) in Agroecosystems of Central Argentina.
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            NameFull: Cittadino, Emilio A.
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            NameFull: Bilenca, David N.
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            NameFull: Busch, María
      – PersonEntity:
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            NameFull: Kravetz, Fernando O.
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            – D: 01
              M: 04
              Text: Apr2002
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              Y: 2002
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              Value: 37
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            – TitleFull: Studies on Neotropical Fauna & Environment
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