Movements, Habitat Use, and Survival of Female Northern Pintails in Southwestern Louisiana.
I developed portable platforms for setting rocket nets in open-water habitats, and used them to capture 1116 waterfowl of 7 species during winters 1991-92 and 1992-93 in southwestern Louisiana. Distance and duration of evening flights of female northern pintails (Anas acuta; hereafter pintails) from...
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ftlouisianastuir:oai:digitalcommons.lsu.edu:gradschool_disstheses-7303 2023-06-11T04:03:38+02:00 Movements, Habitat Use, and Survival of Female Northern Pintails in Southwestern Louisiana. Cox, Robert Ripley, Jr 1996-01-01T08:00:00Z application/pdf https://digitalcommons.lsu.edu/gradschool_disstheses/6304 https://doi.org/10.31390/gradschool_disstheses.6304 https://digitalcommons.lsu.edu/context/gradschool_disstheses/article/7303/viewcontent/9712852.pdf English eng LSU Digital Commons https://digitalcommons.lsu.edu/gradschool_disstheses/6304 doi:10.31390/gradschool_disstheses.6304 https://digitalcommons.lsu.edu/context/gradschool_disstheses/article/7303/viewcontent/9712852.pdf LSU Historical Dissertations and Theses Biology zoology ecology Agriculture forestry and wildlife text 1996 ftlouisianastuir https://doi.org/10.31390/gradschool_disstheses.6304 2023-05-28T19:15:04Z I developed portable platforms for setting rocket nets in open-water habitats, and used them to capture 1116 waterfowl of 7 species during winters 1991-92 and 1992-93 in southwestern Louisiana. Distance and duration of evening flights of female northern pintails (Anas acuta; hereafter pintails) from Lacassine National Wildlife Refuge increased with date within wintering period, and generally were greater than previously reported estimates for wintering waterfowl. I found that diurnal use of refuges by females increased during hunting seasons, contradicting Tamisier's hypothesis that use of refuges by pintails in southwestern Louisiana is not influenced by hunting. Female pintails extensively used privately owned rice and fallow (idle) agriculture, particularly at night. Use of mini-refuges was low relative to that of large permanent pools. This finding does not support Rave and Cordes' prediction that mini-refuges would prove to be more important than pools to wintering pintails. I attribute low use of mini-refuges during my study primarily to lack of water and cover management, but location, small size, and irregular shape of some of these areas may preclude extensive use by pintails. Early mortality (death within the first 4 days after radio-tagging) of females was related to flight quality (scored as good, moderate, or poor upon release). Early mortality and flight quality, in turn, were related to the interaction of holding time (time from capture until release) and number of waterfowl captured in rocket nets. Survival of females in southwestern Louisiana was lower during hunting than during non-hunting seasons, and immatures survived at lower rates than adults. Despite conservative hunting regulations (30-day season and 1 pintail daily), hunting mortality rates (0.165 $\pm$ 0.034 (SE) for adults and 0.315 $\pm$ 0.053 for immatures) of female pintails in southwestern Louisiana were higher than estimates for other female dabbling ducks (within age classes) during winter. If lower daily energy expenditure and ... Text Anas acuta LSU Digital Commons (Louisiana State University) |
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LSU Digital Commons (Louisiana State University) |
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English |
topic |
Biology zoology ecology Agriculture forestry and wildlife |
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Biology zoology ecology Agriculture forestry and wildlife Cox, Robert Ripley, Jr Movements, Habitat Use, and Survival of Female Northern Pintails in Southwestern Louisiana. |
topic_facet |
Biology zoology ecology Agriculture forestry and wildlife |
description |
I developed portable platforms for setting rocket nets in open-water habitats, and used them to capture 1116 waterfowl of 7 species during winters 1991-92 and 1992-93 in southwestern Louisiana. Distance and duration of evening flights of female northern pintails (Anas acuta; hereafter pintails) from Lacassine National Wildlife Refuge increased with date within wintering period, and generally were greater than previously reported estimates for wintering waterfowl. I found that diurnal use of refuges by females increased during hunting seasons, contradicting Tamisier's hypothesis that use of refuges by pintails in southwestern Louisiana is not influenced by hunting. Female pintails extensively used privately owned rice and fallow (idle) agriculture, particularly at night. Use of mini-refuges was low relative to that of large permanent pools. This finding does not support Rave and Cordes' prediction that mini-refuges would prove to be more important than pools to wintering pintails. I attribute low use of mini-refuges during my study primarily to lack of water and cover management, but location, small size, and irregular shape of some of these areas may preclude extensive use by pintails. Early mortality (death within the first 4 days after radio-tagging) of females was related to flight quality (scored as good, moderate, or poor upon release). Early mortality and flight quality, in turn, were related to the interaction of holding time (time from capture until release) and number of waterfowl captured in rocket nets. Survival of females in southwestern Louisiana was lower during hunting than during non-hunting seasons, and immatures survived at lower rates than adults. Despite conservative hunting regulations (30-day season and 1 pintail daily), hunting mortality rates (0.165 $\pm$ 0.034 (SE) for adults and 0.315 $\pm$ 0.053 for immatures) of female pintails in southwestern Louisiana were higher than estimates for other female dabbling ducks (within age classes) during winter. If lower daily energy expenditure and ... |
format |
Text |
author |
Cox, Robert Ripley, Jr |
author_facet |
Cox, Robert Ripley, Jr |
author_sort |
Cox, Robert Ripley, Jr |
title |
Movements, Habitat Use, and Survival of Female Northern Pintails in Southwestern Louisiana. |
title_short |
Movements, Habitat Use, and Survival of Female Northern Pintails in Southwestern Louisiana. |
title_full |
Movements, Habitat Use, and Survival of Female Northern Pintails in Southwestern Louisiana. |
title_fullStr |
Movements, Habitat Use, and Survival of Female Northern Pintails in Southwestern Louisiana. |
title_full_unstemmed |
Movements, Habitat Use, and Survival of Female Northern Pintails in Southwestern Louisiana. |
title_sort |
movements, habitat use, and survival of female northern pintails in southwestern louisiana. |
publisher |
LSU Digital Commons |
publishDate |
1996 |
url |
https://digitalcommons.lsu.edu/gradschool_disstheses/6304 https://doi.org/10.31390/gradschool_disstheses.6304 https://digitalcommons.lsu.edu/context/gradschool_disstheses/article/7303/viewcontent/9712852.pdf |
genre |
Anas acuta |
genre_facet |
Anas acuta |
op_source |
LSU Historical Dissertations and Theses |
op_relation |
https://digitalcommons.lsu.edu/gradschool_disstheses/6304 doi:10.31390/gradschool_disstheses.6304 https://digitalcommons.lsu.edu/context/gradschool_disstheses/article/7303/viewcontent/9712852.pdf |
op_doi |
https://doi.org/10.31390/gradschool_disstheses.6304 |
_version_ |
1768380878719811584 |