Effects of predator activity on the nesting of American Black Ducks and other birds on barrier islands in the mid-Atlantic coast
Landscape change throughout North America has resulted in heightened nest predator population and declining avian productivity. Essential to establishing effective management design is an understanding of differential predation pressure among avian groups as group specific responses to predation imp...
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ftlouisianastuir:oai:repository.lsu.edu:gradschool_theses-4741 2024-09-15T18:00:55+00:00 Effects of predator activity on the nesting of American Black Ducks and other birds on barrier islands in the mid-Atlantic coast Arquilla, Brian Joseph 2007-01-01T08:00:00Z application/pdf https://repository.lsu.edu/gradschool_theses/3742 https://doi.org/10.31390/gradschool_theses.3742 https://repository.lsu.edu/context/gradschool_theses/article/4741/viewcontent/uc.pdf unknown LSU Scholarly Repository https://repository.lsu.edu/gradschool_theses/3742 doi:10.31390/gradschool_theses.3742 https://repository.lsu.edu/context/gradschool_theses/article/4741/viewcontent/uc.pdf LSU Master's Theses predation risk nest density trapping nest success predator activity virginia coast reserve predation Environmental Sciences text 2007 ftlouisianastuir https://doi.org/10.31390/gradschool_theses.3742 2024-08-08T04:27:17Z Landscape change throughout North America has resulted in heightened nest predator population and declining avian productivity. Essential to establishing effective management design is an understanding of differential predation pressure among avian groups as group specific responses to predation impact may exist. The objective of this study was to examine the efficacy of predator trapping on the nest success and density of ground nesting avifauna in 2004-2005 in the Virginia Coast Reserve, specifically dabbling ducks, Canada Goose and Willet. Second, we determine the impact of predation on ground nesting birds by relating indices of predator abundance to nest density and nest success for island plots. Overall Mayfield nest success for dabbling ducks was 54.4% (n = 12) in 2004 and 17.7% (n = 30) in 2005. Green Transformed nest success for dabbling ducks was 34.5% (n = 25) in 2004 and 23.0% (n = 42). For Canada goose, overall Mayfield nest success was 53.1 (n = 37) in 2004 and 47.7% (n = 39) in 2005. Overall Green Transformed nest success for Canada Goose was 59.5% (n = 57) in 2004 and 50.6% (n = 51) in 2005. Finally, overall Green Transformed nest success for Willet was 53.7% (n = 110) in 2004 and 46.0% (n = 118) in 2005. Nest success estimates on island plots varied greatly. There was no difference in nest success between trapped and non-trapped islands for dabbling ducks (P = 0.1990), Canada Goose (P = 0.4860), Willet (P = 0.4920) and artificial nest success (P = 0.4200). Likewise, there was no difference in nest density between trapped and non-trapped islands for dabbling ducks (P = 0.2408), Canada Goose (P = 0.2950), and Willet (P = 0.1381). Several factors may explain this result including a lack of trapping efficacy, design flaws, low intensity of trapping, and differences in island habitat affecting avian nest site selection and sample size. Nest success for both dabbling ducks (P = 0.0225) and Willets (P < 0.0001) was inversely related to predator activity, as measured by artificial nest success. In ... Text Canada Goose LSU Digital Commons (Louisiana State University) |
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LSU Digital Commons (Louisiana State University) |
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predation risk nest density trapping nest success predator activity virginia coast reserve predation Environmental Sciences |
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predation risk nest density trapping nest success predator activity virginia coast reserve predation Environmental Sciences Arquilla, Brian Joseph Effects of predator activity on the nesting of American Black Ducks and other birds on barrier islands in the mid-Atlantic coast |
topic_facet |
predation risk nest density trapping nest success predator activity virginia coast reserve predation Environmental Sciences |
description |
Landscape change throughout North America has resulted in heightened nest predator population and declining avian productivity. Essential to establishing effective management design is an understanding of differential predation pressure among avian groups as group specific responses to predation impact may exist. The objective of this study was to examine the efficacy of predator trapping on the nest success and density of ground nesting avifauna in 2004-2005 in the Virginia Coast Reserve, specifically dabbling ducks, Canada Goose and Willet. Second, we determine the impact of predation on ground nesting birds by relating indices of predator abundance to nest density and nest success for island plots. Overall Mayfield nest success for dabbling ducks was 54.4% (n = 12) in 2004 and 17.7% (n = 30) in 2005. Green Transformed nest success for dabbling ducks was 34.5% (n = 25) in 2004 and 23.0% (n = 42). For Canada goose, overall Mayfield nest success was 53.1 (n = 37) in 2004 and 47.7% (n = 39) in 2005. Overall Green Transformed nest success for Canada Goose was 59.5% (n = 57) in 2004 and 50.6% (n = 51) in 2005. Finally, overall Green Transformed nest success for Willet was 53.7% (n = 110) in 2004 and 46.0% (n = 118) in 2005. Nest success estimates on island plots varied greatly. There was no difference in nest success between trapped and non-trapped islands for dabbling ducks (P = 0.1990), Canada Goose (P = 0.4860), Willet (P = 0.4920) and artificial nest success (P = 0.4200). Likewise, there was no difference in nest density between trapped and non-trapped islands for dabbling ducks (P = 0.2408), Canada Goose (P = 0.2950), and Willet (P = 0.1381). Several factors may explain this result including a lack of trapping efficacy, design flaws, low intensity of trapping, and differences in island habitat affecting avian nest site selection and sample size. Nest success for both dabbling ducks (P = 0.0225) and Willets (P < 0.0001) was inversely related to predator activity, as measured by artificial nest success. In ... |
format |
Text |
author |
Arquilla, Brian Joseph |
author_facet |
Arquilla, Brian Joseph |
author_sort |
Arquilla, Brian Joseph |
title |
Effects of predator activity on the nesting of American Black Ducks and other birds on barrier islands in the mid-Atlantic coast |
title_short |
Effects of predator activity on the nesting of American Black Ducks and other birds on barrier islands in the mid-Atlantic coast |
title_full |
Effects of predator activity on the nesting of American Black Ducks and other birds on barrier islands in the mid-Atlantic coast |
title_fullStr |
Effects of predator activity on the nesting of American Black Ducks and other birds on barrier islands in the mid-Atlantic coast |
title_full_unstemmed |
Effects of predator activity on the nesting of American Black Ducks and other birds on barrier islands in the mid-Atlantic coast |
title_sort |
effects of predator activity on the nesting of american black ducks and other birds on barrier islands in the mid-atlantic coast |
publisher |
LSU Scholarly Repository |
publishDate |
2007 |
url |
https://repository.lsu.edu/gradschool_theses/3742 https://doi.org/10.31390/gradschool_theses.3742 https://repository.lsu.edu/context/gradschool_theses/article/4741/viewcontent/uc.pdf |
genre |
Canada Goose |
genre_facet |
Canada Goose |
op_source |
LSU Master's Theses |
op_relation |
https://repository.lsu.edu/gradschool_theses/3742 doi:10.31390/gradschool_theses.3742 https://repository.lsu.edu/context/gradschool_theses/article/4741/viewcontent/uc.pdf |
op_doi |
https://doi.org/10.31390/gradschool_theses.3742 |
_version_ |
1810438104375361536 |