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Showing 1 to 20 of 134 for “"wintering"”.
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Stock wintering systems in Southland
… in Southland. The area of forage crops for wintering stock has greatly decreased with the development of low cost wintering systems. The change in emphasis from crop to grass wintering of livestock may have affected production per animal and per hectare. Several farming systems are explored …
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Ecology of Finches Migrating and Wintering in Central Illinois
Made available in DSpace on 2014-12-14T16:11:11Z (GMT). No. of bitstreams: 1 7709112.pdf: 3106241 bytes, checksum: 16a8d2620de921f3837ef04e709568da (MD5) Previous issue date: 1976
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Program Feeding Strategies for Reducing Costs of Wintering Beef Cows
The objective of this research was to evaluate program-fed diets for maintaining beef cows. The largest expense in a cow/calf production system is the cost associated with maintaining the producing cow through the winter months. This research focused on evaluating the performance, financial, and …
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Wintering Ecology of Buff-Breasted Sandpipers (Tryngites subruficollis) in Southern Brazil
… Yet, little is known about their ecology at wintering sites and about their population dynamics. In this dissertation, I present results on within- and among-year density trends, life-history strategy, molt, body condition and population dynamics of Buff-breasted Sandpipers wintering in …
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Wintering white-throated sparrows (Zonotrichia albicollis): home ranges, aggression and corticosterone
… of 2011-2012, I focused on behavioral aspects of wintering sparrows. Flocks use distinct territories and maintain their ranked relationships throughout the winter, though familiarity lessens outright conflict as the season progresses. White-throated sparrows, unlike most songbirds, continue …
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Ecology of wintering Canada geese in the greater Chicago metropolitan area
… The majority of transmittered Canada geese (85%) wintering in the GCMA never migrated south and no geese made foraging flights outside of the GCMA to agricultural fields. Winter survival was 100% for Canada geese remaining in the GCMA and 48% for geese that left the GCMA, with all mortality due to …
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Movements and bioenergetics of canvasbacks wintering in the upper Chesapeake Bay
… energetics of canvasbacks (Aythya valisineria) wintering in the upper Chesapeake Bay, Maryland, were investigated. Eighty-seven juvenile female canvasbacks were radio-tracked between 30 December 1988 and 25 March 1989. Diurnal time and energy budgets were constructed for a time of day-season …
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Habitat use and energetics of American black ducks wintering at Chincoteague, Virginia
… of American black ducks (Anas rubripes) wintering at Chincoteague National Wildlife Refuge, Virginia, were investigated. Twenty-two female black ducks were systematically radiotracked on the 25,600 ha study area between 15 December 1985 and 28 February 1986. Diurnal time and energy …
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Habitat use by juvenile female canvasbacks wintering on the upper Chesapeake Bay
… habitat use by juvenile female canvasbacks wintering on the upper Chesapeake Bay was determined. Radio-implanted canvasbacks used shallow water (0-2 m) areas near artificial feeding sites during the day, and deeper water (2-6 m) that had an abundant (> 200/m²) population of small (< 25 mm) …
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Behavioral choices of male humpback whales (Megaptera novaeangliae) on the Hawaiʻian wintering grounds
… to mate. The North Pacific has three main wintering grounds: Hawaii, Mexico/California, and Japan (Dawbin, 1966, Darling and Jurasz, 1983; Baker, Herman, Perry, Lawton, Straley, Wolman, Kaufman, Winn, Hall, Reinke, and Ostman, 1986). Currently, approximately 4,500 humpback whales migrate …
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The Impact of Wind Turbines on the Distribution of Wintering and Migrating Raptors
… is renowned for its number and diversity of wintering raptors. Wind turbines were built on the island in 2018. In this study, we used standardized surveys to record the presence, number, and precise location of raptors on Amherst Island during winter and spring migration for three years …
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Habitat use by wintering passerines in fire-managed forests along the U.S. Gulf Coast
… declining populations, use the Gulf Coast as a wintering area, and some depend on habitats managed by fire. To provide information for land managers, I studied the winter bird community at Naval Live Oaks in Gulf Islands National Seashore with two primary objectives: (1) to describe the …
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Studies of the Physiology of Wintering and of Molting Canada Geese (Branta Canadensis Interior)
Made available in DSpace on 2014-12-04T22:46:05Z (GMT). No. of bitstreams: 1 5805425.pdf: 5416034 bytes, checksum: dc26f46ff3d495e0e36f0b5a3b446f78 (MD5) Previous issue date: 1958
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The Effects of Hydrilla Infestation on Selected Wintering Waterfowl: Santee Copper Lake System, South Carolina
… that winter on the lake. While traditional wintering species such as Wigeon and Gadwalls have taken advantage of this new source of nutrition and increased greatly in total numbers, Ringneck ducks have multiplied in total numbers during the years of infestation to levels never before seen on …
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Wintering Reddish Egret (Egretta Rufescens) Foraging Response To Environmental Variability On The Southern Texas Gulf Coast
… studied, little information is known about the wintering ecology of the species. With the goal of gaining more knowledge of its winter foraging habitat requirements, I conducted line transect surveys via boat of foraging Reddish Egrets from November 2019 to March 2021 in the Laguna Madre land …
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Habitat Characteristics Affecting Site Occupation in Wintering Henslow’s Sparrows at Mississippi Sandhill Crane National Wildlife Refuge
… seed abundance and litter depth are important to wintering Henslow’s sparrows. My study asked how habitat variables including vegetation structure, seed abundance, and arthropod abundance predict Henslow’s sparrow site occupancy at Mississippi Sandhill Crane National Wildlife Refuge. In this …
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HABITAT USE AND THE EFFECTS OF DISTURBANCE ON WINTERING BIRDS USING RIPARIAN HABITATS IN SONORA, MEXICO
… corridors; however, their importance for wintering birds has not been assessed systematically. In order to assess the value of riparian areas for birds wintering in Sonora, data from 1,816 standard point counts were collected from 87 locations during January and February 2004-2006. A total …
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HABITAT USE AND THE EFFECTS OF DISTURBANCE ON WINTERING BIRDS USING RIPARIAN HABITATS IN SONORA, MEXICO
… corridors; however, their importance for wintering birds has not been assessed systematically. In order to assess the value of riparian areas for birds wintering in Sonora, data from 1,816 standard point counts were collected from 87 locations during January and February 2004-2006. A total …
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