Download or read book Survival and Migration Ecology of Emperor Geese Along the Alaska Peninsula written by Joel A. Schmutz and published by . This book was released on 1990 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Survival and migratory patterns of emperor geese (Chen canagica) were investigated during 1988-90 by marking flightless geese with neck collars and reobserving them on spring and fall staging areas."--P. 1.
Download or read book Survival and Migration Ecology of Emperor Geese Along the Alaska Peninsula written by and published by . This book was released on 1990 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Survival and migratory patterns of emperor geese were investigated by placing neck collars on flightless geese during late summer and reobserving them at migratory staging grounds in the spring and fall, 1988-89. We obtained observational data at two of several major staging areas located on the Alaska Peninsula, Cinder and Nelson Lagoons."--Leaf 2.
Download or read book Survival and Brood Rearing Ecology of Emperor Geese written by Joel A. Schmutz and published by . This book was released on 2000 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Emperor Geese (Chen canagica) breed on the Yukon-Kuskokwim Delta in an area inhabited by three other goose species. Whereas populations of other geese increased since the mid 1980s, Emperor Goose numbers remained low. Because survival and habitat selection by broods of Emeperor Geese had not been studied previously and numbers of predatory Glaucous Gulls (Larus hyperboreus) had recently increased, I studied brood rearing ecology of Emperor Geese during 1993-1996 to assess whether this seasonal period could be limiting population growth. Survival of goslings to 30 days varied among years from 0.32 to 0.70 and was primarily influenced by mortality during the first five days after hatch. Other goose species with similar rates of gosling survival are increasing rapidly. Survival of Emperor Goose goslings was lowest in 1994, when unusually heavy rainfall occurred during early brood rearing. Using a long-term data set from Izembek National Wildlife Refuge, sizes of families in fall (n=23 years) were related to rainfall during early brood rearing. Gosling survival was lower and gull disturbance of broods greater in 1993-1994 than in 1995-1996. Although goslings wer commonly consumed by Glaucous Gulls, gull diets during 1993 were similar to those observed in the 1970s. Across a broad scale, broods of Emperor Geese (n=56) strongly selected habitats dominated by Carex subspathaceae, Carex ramenskii, and unvegetated areas interspersed among these forage species, as determined from telemetry. These selected habitats comprised one-third of all available habitat. Habitat selection by the composite goose community (dominated by Cackling Canada Geese [Branta canadensis minima]) was assessed by feces collections and differed substantially from that of Emperor Geese. Broods of Emperor Geese spent more time feeding during 1993-1996 than during an earlier study in 1985-1986. During 1994-1996, feeding rates of gosling and adult females was related more to total goose density than to Emperor Goose density. Although Cackling Canada Geese exhibited strongest selection of other habitats, their greater overall abundance resulted in numerical equivalence to Emperor Geese in habitats preferred by Emperor Geese. Interspecific competition for food has impacted behavior in Emperor Geese, which may impact growth and survival of juvenile geese"--Leaves 3-4
Download or read book The Lives of Geese written by and published by . This book was released on 1988 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reproductive Ecology and Environmental Change written by Jordan M. Thompson and published by . This book was released on 2022 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monitoring Emperor Goose Populations by Aerial Survey Counts and Fall Age Ratio written by William I. Butler and published by . This book was released on 1995 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: From 1985 to 1994 flocks of emperor goose (Chen canagica) were photographed during fall migration at lagoons along the north side of the Alaska Peninsula to monitor annual production, population size, and average survival rate.
Download or read book Monitoring Emperor Goose Populations by Aerial Counts and Fall Age Ratio written by Timothy J. Tiplady and published by . This book was released on 1997 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flocks of emperor goose (Chen canagica) were photographed during fall migration at lagoons along the north side of the Alaska Peninsula to monitor annual production, population size, and average survival rate.
Download or read book Monitoring Emperor Goose Populations by Aerial Counts and Fall Age Ratio written by Gregory R. Balogh and published by . This book was released on 1995 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flocks of emperor goose (Chen canagica) were photographed during fall migration at lagoons along the north side of the Alaska Peninsula to monitor annual production, population size, and average survival rate.
Download or read book Biological Papers of the University of Alaska written by and published by . This book was released on 1996 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Implications of Agriculture in Interior Alaska for Population Dynamics of Canada Geese branta Canadensis written by Michael William Eichholz and published by . This book was released on 2001 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Understanding how environmental change affects demography is essential for understanding and managing populations. An anthropogenic change in the environment that has affected wildlife populations is widespread agricultural development. Agriculture has both negatively and positively impacted abundance of species by affecting a variety of vital rates that influence population abundance. In this study, I describe the migration ecology of Canada geese (Branta Canadensis) that nest and stage in Interior Alaska. I also describe how the introduction of agriculture has potentially positively impacted population dynamics of Canada geese by increasing nutrient acquisition, thereby improving their fecundity and survival. Two subspecies of Canada geese used Interior Alaska for staging and at least partially segregated themselves during spring and fall staging. I documented a difference in survival between two age classes of Canada geese, primarily lesser Canada geese (B. c. parvipes), and attributed it to the higher susceptibility to harvest of hatch-year (HY) geese. Estimates of annual survival of Canada geese in this study are among the lowest, and estimates of recovery rates are among the highest, for a migratory population of geese, likely due to behavioral traits and habitat selection that make lesser Canada geese more susceptible to harvest. Survival of after-hatch-year (AHY) female Canada geese was positively associated with the amount of endogenous nutrient reserves females had at the time of banding in fall. An experimental manipulation of nutrient reserves, however, suggested that the association between nutrient reserves and survival results from variation in individual quality (not measured), not a direct relationship between nutrient reserves and survival. Female geese in our study gained fat and minerals, but not protein, during spring staging. Fall staging geese had fat levels greater than or equal to spring staging geese, suggesting fat reserves are important during early fall staging in this population of geese. Although I concluded that the introduction of agriculture has likely increased fecundity and decreased natural mortality in Canada geese that stage and breed in Interior Alaska, I also concluded that mortality due to harvest is sufficient to offset those changes, preventing an increase in the population"--Leaves iii-iv
Download or read book Ecology of the Emperor Goose in Alaska written by David I. Eisenhauer and published by . This book was released on 1977 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt: Monograph presenting data from field work and other sources to establish a baseline for emperor goose (Anser canagicus) nesting and ecology behavior on a breeding area free of disruptive human activity (Kokechik Bay, Kuskokwim area western Alaska).
Download or read book Monitoring Emperor Goose Populations by Aerial Counts and Fall Age Ratio Fall 2003 written by Paul D. Anderson and published by . This book was released on 2004 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flocks of emperor goose (Chen canagica) were photographed during 2003 fall migration at lagoons along the north side of the Alaska Peninsula to monitor annual production, population size, and average survival rate.
Download or read book Monitoring Emperor Goose Populations by Aerial Counts and Fall Age Ratio Fall 2004 written by Paul D. Anderson and published by . This book was released on 2005 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flocks of emperor goose (Chen canagica) were photographed during fall migration at lagoons along the north side of the Alaska Peninsula to monitor annual production, population size, and average survival rate.
Download or read book Reproductive Ecology of Emperor Geese written by Margaret Rose Petersen and published by . This book was released on 1991 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecology of the Emperor Goose written by P.C. Headley and published by . This book was released on 1967 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Observations of Cackling Canada Geese and Emperor Geese on the Alaska Peninsula During Fall Migration 1983 written by Karen S. Bollinger and published by . This book was released on 1984 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary objective of the Oct. 7-16 survey was to read neck collars on cackling Canada geese at Pilot Point and on emperor geese at Cinder River.
Download or read book Nesting Ecology of the Emperor Goose written by Philip C. Headley and published by . This book was released on 1967 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nesting and brooding behaviors of the emperor goose were studied in the Hooper Bay region of Alaska during the summers of 1965 and 1966. The wintering grounds of the goose in the Cold Bay and Izembek Bay areas (at the tip of the Alaska Peninsula) were studied in December 1965 and in February and September 1966. The purpose of the study was to increase knowledge of the ecology of the emperor goose on both its nesting and wintering grounds. Nesting studies were restricted to the Kolamak River region, 18 miles northeast of Hooper Bay. Brood observations were limited to the Bering Sea coast from Nelson Island in the south to Askinuk Mountains in the north.
