The Sacramento-San Joaquin River Delta region of California (hereafter, Delta region) is an impor... more The Sacramento-San Joaquin River Delta region of California (hereafter, Delta region) is an important wintering region for the Central Valley Population of greater sandhill cranes (Grus canadensis tabida) and lesser sandhill cranes (G. c. canadensis), but basic information about the ecology of these birds is lacking to design a biologically sound conservation strategy. During the winters of 2007-08 and 2008-09, we conducted roost counts, roadside surveys, aerial surveys, and tracked radio-marked birds to define the geographic area used by sandhill cranes in the Delta region, document migration chronology, and estimate subspecies-specific abundance. Radio-marked sandhill cranes arrived in our study area beginning 3 October, most arrived in mid-October, and the last radio-marked sandhill crane arrived on 10 December. Departure dates ranged from 15 January to 13 March. Mean arrival and departure dates were similar between subspecies. From mid-December through early-February in 2007-200...
AGE-SPECIFIC SURVIVAL OF GREATER SANDHILL CRANE COLTS IN NEVADA. Chad August, Jim Sedinger, and C... more AGE-SPECIFIC SURVIVAL OF GREATER SANDHILL CRANE COLTS IN NEVADA. Chad August, Jim Sedinger, and Chris Nicolai 111 WHOOPING CRANE DISTRIBUTION AND HABITAT USE: PAST, PRESENT, AND FUTURE? Jane Austin, Matthew Hayes, and Jeb Barzen 111 BEHAVIORAL MOVEMENTS OF ARANSAS-WOOD BUFFALO WHOOPING CRANES: ANOMALIES OR INDICATIONS OF WAYS TO FURTHER ENHANCE SPECIES RECOVERY. David Baasch, Mark Bidwell, Wade Harrell, Kris Metzger, Aaron Pearse, and Mary Harner 112 INFLUENCES ON NEST SUCCESS IN A REINTRODUCED POPULATION OF WHOOPING CRANES. Jeb Barzen, Sarah Converse, Peter Adler, Elmer Gray, Anne Lacy, Eva Szyszkoski, and Andrew Gossens 113 DETERMINING DIET COMPOSITION AND INGESTION RATE OF CRANES THROUGH FIELD MEASUREMENT. Jeb Barzen, Ted Thousand, Julia Welch, Megan Fitzpatrick, Eloise Lachance, and Triet Tran 114 HABITAT USE AND MOVEMENT PATTERNS OF WHOOPING CRANES IN THE OIL SANDS MINING REGION. Mark Bidwell, David Baasch, Dave Brandt, John Conkin, Mary Harner, Wade Harrell, Kris Metzger, Aaro...
Because of its widespread distribution, Kudzu is one of the most common inva-sive species managem... more Because of its widespread distribution, Kudzu is one of the most common inva-sive species management concerns in the Southeast. Nonetheless, there are few quantitative data documenting its effects on native species. This study examines the seasonal correlations between Kudzu and avian species diversity and abundance in southeastern Tennessee. By measuring the structure and composition of the overstory, midstory, and understory vegetation at sites with differing levels of Kudzu coverage, we examined correlations between Kudzu density and avian numbers. Kudzu coverage had a significant negative impact on avian diversity (P < 0.001) and species richness (P < 0.001). Kudzu's alteration of vegetation structure, through the creation of a monoculture and subsequent reduction of structural diversity, was likely the cause of reduced avian diversity and richness.
Predation is believed to be the primary cause of nesting mortality among North American migratory... more Predation is believed to be the primary cause of nesting mortality among North American migratory land birds. High rates of nest predation can jeopardize avian reproductive biology by affecting life histories and habitat selection. Artificial nests are commonly used to study nest predation because they allow the researcher to investigate comparative treatments and their impact on predation. Relative nest predation was studied at Audubon Acres in Chattanooga, TN using artificial nests. The study investigated differences in habitat type, nest height, egg type, and predator type. Results of this study showed very high levels of nest predation across each of the study variables; urbanization and forest fragmentation were believed to be the most likely contributors to nest predation.
Retaining the introductory flavor of the now classic First Edition, this revision includes all th... more Retaining the introductory flavor of the now classic First Edition, this revision includes all the latest techniques in the field. New information on methods of radio tag harnessing, new sections on satellite tracking techniques and new types of data analysis are all included. ...
The Sacramento-San Joaquin River Delta region of California (hereafter, Delta region) is an impor... more The Sacramento-San Joaquin River Delta region of California (hereafter, Delta region) is an important wintering region for the Central Valley Population of greater sandhill cranes (Grus canadensis tabida) and lesser sandhill cranes (G. c. canadensis), but basic information about the ecology of these birds is lacking to design a biologically sound conservation strategy. During the winters of 2007-08 and 2008-09, we conducted roost counts, roadside surveys, aerial surveys, and tracked radio-marked birds to define the geographic area used by sandhill cranes in the Delta region, document migration chronology, and estimate subspecies-specific abundance. Radio-marked sandhill cranes arrived in our study area beginning 3 October, most arrived in mid-October, and the last radio-marked sandhill crane arrived on 10 December. Departure dates ranged from 15 January to 13 March. Mean arrival and departure dates were similar between subspecies. From mid-December through early-February in 2007-200...
AGE-SPECIFIC SURVIVAL OF GREATER SANDHILL CRANE COLTS IN NEVADA. Chad August, Jim Sedinger, and C... more AGE-SPECIFIC SURVIVAL OF GREATER SANDHILL CRANE COLTS IN NEVADA. Chad August, Jim Sedinger, and Chris Nicolai 111 WHOOPING CRANE DISTRIBUTION AND HABITAT USE: PAST, PRESENT, AND FUTURE? Jane Austin, Matthew Hayes, and Jeb Barzen 111 BEHAVIORAL MOVEMENTS OF ARANSAS-WOOD BUFFALO WHOOPING CRANES: ANOMALIES OR INDICATIONS OF WAYS TO FURTHER ENHANCE SPECIES RECOVERY. David Baasch, Mark Bidwell, Wade Harrell, Kris Metzger, Aaron Pearse, and Mary Harner 112 INFLUENCES ON NEST SUCCESS IN A REINTRODUCED POPULATION OF WHOOPING CRANES. Jeb Barzen, Sarah Converse, Peter Adler, Elmer Gray, Anne Lacy, Eva Szyszkoski, and Andrew Gossens 113 DETERMINING DIET COMPOSITION AND INGESTION RATE OF CRANES THROUGH FIELD MEASUREMENT. Jeb Barzen, Ted Thousand, Julia Welch, Megan Fitzpatrick, Eloise Lachance, and Triet Tran 114 HABITAT USE AND MOVEMENT PATTERNS OF WHOOPING CRANES IN THE OIL SANDS MINING REGION. Mark Bidwell, David Baasch, Dave Brandt, John Conkin, Mary Harner, Wade Harrell, Kris Metzger, Aaro...
Because of its widespread distribution, Kudzu is one of the most common inva-sive species managem... more Because of its widespread distribution, Kudzu is one of the most common inva-sive species management concerns in the Southeast. Nonetheless, there are few quantitative data documenting its effects on native species. This study examines the seasonal correlations between Kudzu and avian species diversity and abundance in southeastern Tennessee. By measuring the structure and composition of the overstory, midstory, and understory vegetation at sites with differing levels of Kudzu coverage, we examined correlations between Kudzu density and avian numbers. Kudzu coverage had a significant negative impact on avian diversity (P < 0.001) and species richness (P < 0.001). Kudzu's alteration of vegetation structure, through the creation of a monoculture and subsequent reduction of structural diversity, was likely the cause of reduced avian diversity and richness.
Predation is believed to be the primary cause of nesting mortality among North American migratory... more Predation is believed to be the primary cause of nesting mortality among North American migratory land birds. High rates of nest predation can jeopardize avian reproductive biology by affecting life histories and habitat selection. Artificial nests are commonly used to study nest predation because they allow the researcher to investigate comparative treatments and their impact on predation. Relative nest predation was studied at Audubon Acres in Chattanooga, TN using artificial nests. The study investigated differences in habitat type, nest height, egg type, and predator type. Results of this study showed very high levels of nest predation across each of the study variables; urbanization and forest fragmentation were believed to be the most likely contributors to nest predation.
Retaining the introductory flavor of the now classic First Edition, this revision includes all th... more Retaining the introductory flavor of the now classic First Edition, this revision includes all the latest techniques in the field. New information on methods of radio tag harnessing, new sections on satellite tracking techniques and new types of data analysis are all included. ...
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