• TABLE OF CONTENTS
HIDE
 Title Page
 Dedication
 Acknowledgement
 Table of Contents
 List of Tables
 Abstract
 Introduction
 Study areas and methods
 Results
 Discussion
 Conclusion and conservation...
 References
 Biographical sketch






Title: Abundance, movement and habitat use of Swainson's hawks in their wintering grounds, Argentina
CITATION PDF VIEWER THUMBNAILS PAGE IMAGE ZOOMABLE
Full Citation
STANDARD VIEW MARC VIEW
Permanent Link: http://ufdc.ufl.edu/UF00100685/00001
 Material Information
Title: Abundance, movement and habitat use of Swainson's hawks in their wintering grounds, Argentina
Physical Description: Archival
Language: English
Creator: Canavelli, Sonia Beatriz, 1968- ( Dissertant )
Tanner, George ( Thesis advisor )
Sieving, Kathryn ( Reviewer )
Meyer, Kenneth ( Reviewer )
Publisher: University of Florida
Place of Publication: Gainesville, Fla.
Publication Date: 2000
Copyright Date: 2000
 Subjects
Subjects / Keywords: Wildlife Ecology and Conservation thesis, M.S   ( lcsh )
Dissertations, Academic -- Wildlife Ecology and Conservation -- UF   ( lcsh )
Genre: government publication (state, provincial, terriorial, dependent)   ( marcgt )
bibliography   ( marcgt )
theses   ( marcgt )
non-fiction   ( marcgt )
 Notes
Abstract: Knowledge of habitat use by a particular species is necessary in developing species conservation plans. Large-scale mortality of Swainson's hawks (Buteo swainsoni) in Argentina during austral summer 1995-96 identified the need to address several questions about relationships between hawks and their wintering ground environment. In 1996, an international and interdisciplinary research project involving numerous institutions and agencies was initiated to understand causes of Swainson's hawk mortality and to prevent future mortality events. A research component addressed questions about the patterns of abundance, movement and habitat use of Swainson's hawks in particular wintering areas. In this study, population abundances, individual movements and habitat use, both at population and individual levels of resolution, were analyzed at a landscape scale in two study areas. These areas were located in La Pampa and Santa Fe provinces of Argentina and the study was conducted in 1996-97 and 1997-98 austral summers. Field methods included systematic surveys, conventional radio tagging of individual hawks and focal observations. Densities of hawks varied between 4.40 and 5.02 hawks/km2 in La Pampa and 3.51 hawk/km2 in Santa Fe, with high variations in these values through the season. Hawks widely dispersed at regional level (far away from the limits of the study area) and used a defined study area with a random pattern, without constituting tight groups or flocks. Finally, both at population and individual levels, hawks selected permanent pastures (for foraging), plowed fields (for sunbathing/resting and sometimes for foraging) and woodlands (for roosting), but their clustered spatial distribution was not associated with the abundance of these selected habitat types. These results reflected similarities in the pattern of habitat use with the breeding areas, and they could be expected from adaptations of a migratory raptor to the dynamic changes of heterogeneous agricultural landscapes, especially in relation to food availability. Patterns of habitat use showed a combination of risk factors that made hawks susceptible to pesticide applications in their wintering ground. In addition, values of population abundance found in this study as well as patterns of movement gave a baseline for the development of conservation measures directed to explore and prevent the incidence of agricultural practices, such as pesticide applications and changes in land use, on populations of Swainson's hawks wintering in the Argentinean pampas.
Subject: Swainson's hawk, Buteo swainsoni, Argentina, habitat use, movement, abundance, wintering grounds, mortalities, migration
Thesis: Thesis (M.S.)--University of Florida, 2000.
Bibliography: Includes bibliographical references (p. 108-118).
System Details: System requirements: World Wide Web browser and PDF reader.
System Details: Mode of access: World Wide Web.
Statement of Responsibility: by Sonia Beatriz Canavelli.
General Note: Title from first page of PDF file.
General Note: Document formatted into pages; contains xiii, 119 p.; also contains graphics.
General Note: Vita.
 Record Information
Bibliographic ID: UF00100685
Volume ID: VID00001
Source Institution: University of Florida
Holding Location: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 45840324
alephbibnum - 002639306
notis - ANA6132

Downloads

This item has the following downloads:

PDF ( 1 MBs ) ( PDF )


Table of Contents
    Title Page
        Page i
        Page ii
    Dedication
        Page iii
    Acknowledgement
        Page iv
        Page v
        Page vi
    Table of Contents
        Page vii
        Page viii
    List of Tables
        Page ix
        Page x
        Page xi
    Abstract
        Page xii
        Page xiii
    Introduction
        Page 1
        Page 2
        Page 3
        Page 4
        Page 5
        Page 6
        Page 7
        Page 8
        Page 9
        Page 10
        Page 11
        Page 12
        Page 13
        Page 14
        Page 15
    Study areas and methods
        Page 16
        Page 17
        Page 18
        Page 19
        Page 20
        Page 21
        Page 22
        Page 23
        Page 24
        Page 25
        Page 26
        Page 27
        Page 28
        Page 29
        Page 30
        Page 31
        Page 32
        Page 33
        Page 34
        Page 35
        Page 36
        Page 37
        Page 38
    Results
        Page 39
        Page 40
        Page 41
        Page 42
        Page 43
        Page 44
        Page 45
        Page 46
        Page 47
        Page 48
        Page 49
        Page 50
        Page 51
        Page 52
        Page 53
        Page 54
        Page 55
        Page 56
        Page 57
        Page 58
        Page 59
        Page 60
        Page 61
        Page 62
        Page 63
        Page 64
        Page 65
        Page 66
        Page 67
        Page 68
        Page 69
        Page 70
        Page 71
        Page 72
        Page 73
        Page 74
        Page 75
        Page 76
        Page 77
        Page 78
        Page 79
        Page 80
        Page 81
        Page 82
    Discussion
        Page 83
        Page 84
        Page 85
        Page 86
        Page 87
        Page 88
        Page 89
        Page 90
        Page 91
        Page 92
        Page 93
        Page 94
        Page 95
        Page 96
        Page 97
        Page 98
        Page 99
        Page 100
        Page 101
    Conclusion and conservation applications
        Page 102
        Page 103
        Page 104
        Page 105
        Page 106
        Page 107
    References
        Page 108
        Page 109
        Page 110
        Page 111
        Page 112
        Page 113
        Page 114
        Page 115
        Page 116
        Page 117
        Page 118
    Biographical sketch
        Page 119
University of Florida Home Page
© 2004 - 2010 University of Florida George A. Smathers Libraries.
All rights reserved.

Acceptable Use, Copyright, and Disclaimer Statement
Last updated October 10, 2010 - Version 2.9.9 - mvs