Download or read book The Ecology of Canada Geese Branta Canadensis in Nottinghamshire and Their Importance in Relation to Agriculture written by R. White-Robinson and published by . This book was released on 1984 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Ecology of Canada Geese Branta Canadensis in Nottinghamshire and Their Importance in Relation to Agriculture written by R. White-Robinson and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Ecology of Canada Geese Brauta canadensis in Nottinghamshire and Their Relation to Agriculture written by Richard White-Robinson and published by . This book was released on 1984 with total page 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 Conservation Assessment for the Dusky Canada Goose Branta Canadensis Occidentalis Baird written by Robert Graham H. Bromley and published by . This book was released on 2003 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Goose Populations of the Western Palearctic written by Jesper Madsen and published by . This book was released on 1999 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Canada Goose Branta Canadensis written by U.S. Fish and Wildlife Service and published by . This book was released on 1981 with total page 876 pages. Available in PDF, EPUB and Kindle. Book excerpt: All aspects of Canada goose biology, research, management and taxonomy are included. Literature search was carried out through 1977. 646 citations.
Download or read book British Reports Translations and Theses written by British Library. Document Supply Centre and published by . This book was released on 1985 with total page 1000 pages. Available in PDF, EPUB and Kindle. Book excerpt: Issue for Mar. 1981 contains index for Jan.-Mar. 1981 in microfiche form.
Download or read book Reproductive Ecology Bioenergetics and Experimental Removal of Local Giant Canada Geese Branta Canadensis Maxima in Central Missouri written by John Matthew Coluccy and published by . This book was released on 2001 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: Populations of Giant Canada Geese (Branta canadensis maxima) have increased dramatically throughout most of the Mississippi Flyway. This population expansion has been accompanied by an increase in goose-related problems, including depredation of agricultural crops, airport hazards, fecal contamination of water used for drinking or swimming, and damage to lawns, parks, beaches, and golf courses, caused by overgrazing, trampling, feathers, and defecation. Failure to control giant Canada goose populations through traditional harvest methods such as hunting, has prompted interest in alternative harvest methods (nest manipulations, welfare harvest, and nesting female harvest) as a means of reducing goose numbers. The intent of this research was to generate long-term reproductive, survival and bioenergetics data and to utilize these data to develop a population model specific to Missouri Giant Canada Geese. The model was then used to identify population parameters that most influence population growth and to evaluate proposed management actions. Sensitivity analyses indicated that the effect of adult survival on population growth was much greater than any other population parameter. Alternative harvest simulations indicated that nesting female harvest was the most effective means of reducing populations to statewide management objectives. From a management perspective, our results indicate that efforts to control numbers of giant Canada geese should focus on reducing adult survival, in particular adult female survival. It is unlikely that the required reduction in adult survival necessary to reach management objectives will be achieved through traditional harvest methods. Therefore, a combination of non-hunting lethal alternatives will be required.
Download or read book British Reports Translations and Theses written by British Library. Lending Division and published by . This book was released on 1985 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nesting and Brood rearing Ecology of Resident Canada Geese in New Jersey written by Katherine Guerena and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Atlantic Flyway Resident Population (AFRP) of Canada geese (Branta canadensis) in New Jersey has grown so considerably during the last thirty years that it is now considered a nuisance in urban areas (United States Fish and Wildlife Service 2003). New Jersey is also the most densely human populated state in the nation, with intensive urbanization of agricultural and natural lands. Development of corporate parks and urban areas with manicured lawns and artificial ponds offer ideal nesting habitat for AFRP geese, with limited pressure from hunting or natural predators. As a result, spatial heterogeneity in reproduction and survival must be taken into account in managing the population. My objectives for this study were to 1) identify the spatial scale/s at which land use features influence nest site selection and nest success, 2) estimate nesting parameters across three decades and identify variables that influence productivity, and 3) estimate pre-fledged gosling survival from hatch until summer molt banding efforts, in order to assist in developing a spatially-explicit population model for AFRP geese in New Jersey. I conducted a two-year (2009-2010) nesting ecology study of AFRP Canada geese, and compared it to data collected in New Jersey from 1985-1989 and 1995-1997. Nest searches were conducted on 250 1-km2 plots throughout the state, and 309 nests were monitored through hatch to determine the fate. I ran a spatial correlation analysis of land use composition to nest success during 2009-2010 to identify spatial scales at which geese respond to their environment for nest site selection and nest success. All significant spatial scales were at or below 2250m for the five classified land use types. Geese responded to human dominated land uses at a smaller scale than land uses with low human density. Mean clutch size at hatch in 2009-2010 was 4.66 eggs (SE ± 0.12 eggs) and 4.76 eggs (SE ± 0.16 eggs), respectively. Mean hatchability in 2009-2010 was 0.86 (SE ± 0.02) and 0.81 (SE ± 0.02), respectively. I estimated nest success at 0.44 (SE ± 0.05) in 2009 and 0.41 (SE ± 0.05) in 2010. Variables important to nest success from 1985-1989 were the age of the nest, year, extreme high temperature, nest density, rural residential land use at the landscape scale, commercial at the site level, and daily precipitation. Variables important to nest success for 1995-1997 were the age of the nest, date of nest initiation, year, physiographic stratum, extreme high temperature, rural residential land use at the landscape level, and agricultural land use at the site level. Variables important to nest success for 2009-2010 were the age of the nest and date of nest initiation. Nest success decreased during the duration of the study, likely due to an increase in reproductive control efforts. Additionally, I conducted a two-year (2009-2010) gosling survival study from hatch until annual banding efforts in late-June at 12 known nesting and brood rearing sites. To estimate gosling survival, I used 1) mark-recapture of web tagged goslings to estimate partial brood loss, 2) radio-collared breeding adults to estimate total brood loss, and 3) observations of broods associated with marked adults and color-marked broods to quantify mortality during the first two weeks after hatch. The proportion of breeding adults that experienced total brood loss was 0.316. The remaining proportion of breeding adults was subject to partial brood loss (0.684), which was estimated at 0.465 (SE ± 0.026) for 56 days. The overall survival estimate for 56 days after hatch was 0.318 (SE ± 0.018). Select environmental and density-dependent variables were used to build candidate models to identify sources of variation in partial brood loss. The number of broods at the site was negatively related to brood survival. The percent agriculture within 215 m was positively related to brood survival. Managers are encouraged to consider scale-dependent relationships in identifying habitat-wildlife relationships, and if population control of AFRP Canada geese is of primary interest, then focus on habitat management at the local scale will most likely have the largest influence. Developing productivity trends should assist in understanding the dynamics of recruitment as a function of population size, spatial distribution, and human influence. I recommend that managers consider land use and human development as important features in identifying the driving forces of productivity in AFRP Canada geese.
Download or read book Birds of Essex written by Simon Wood and published by A&C Black. This book was released on 2009-01-01 with total page 657 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an essential reference for anybody who has watched birds in this amazing county. The County Avifaunas give full details of the status and range of every species recorded in the county in question. Each title covers all species on the county list, with a detailed breakdown of rarity records, and each has introductory sections describing the county's general ecology, climate, weather patterns, its ornithological history and conservation record. Essex is of national and international importance to many migrating and wintering wildfowl and waders, which can be found on the estuaries. Further inland, the Lea Valley harbours important populations of several species within the complex of reservoirs and gravel-pits. Elsewhere, the diverse habits of woodland and parkland, heaths and commons, agricultural land and urban areas mean that at all times of year there is the opportunity to see upwards of 100 species in a day with little effort. This book analyses and summarises all the data collated and documented over the last 200 years and includes available records to the end of 2004. Introductory chapters discuss the geology and habitats of Essex and the amazing fossil bird record. The individual accounts provide an up-to-date status of each species and patterns of occurrence within Essex. A distribution map is included for most breeding species. A breakdown and analysis are provided for all county rarities. Superb line drawings and photographs illustrate the book, all by talented local artists and photographers.
Download or read book Towards Conservation of the Diversity of Canada Geese Branta Canadensis written by Canadian Wildlife Service and published by . This book was released on 2000 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a compilation of papers on the ecology of the Canada goose populations, beginning with a paper on the diversity of this species and the status of its different populations in North America. The remaining papers concern populations breeding in the Arctic, subarctic & boreal regions, and temperate regions. Topics covered include population status, distribution, survival, behaviour, surveys, breeding & nesting ecology, monitoring, and management.
Download or read book Influence of Sympatric Lesser Snow Geese Chen Caerulescens Caerulescens on Reproductive Performance Behavior and Food Habits of Canada Geese Branta Canadensis Interior on Akimiski Island Nunavut written by Jeffrey Scott Gleason and published by Library and Archives Canada = Bibliothèque et Archives Canada. This book was released on 2003 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research on Akimiski Island, Nunavut, indicates declining numbers of nesting Southern James Bay Population (SJBP) Canada Geese (Branta canadensis interior) while increases have been documented for number of breeding Lesser Snow Geese (Chen caerulescens caerulescens). Low direct recovery rates of goslings is suggestive of late-summer mortality which may be limiting recruitment for Canada geese on Akimiski Island. This study was designed specifically to (1) compare Canada Goose reproductive performance, incubation and brood-rearing behavior in areas of allopatry and sympatry and with Lesser Snow Geese, (2) determine if there are differences in diets of Canada Geese in areas of allopatry and sympatry, and (3) determine if there are differences in diets of Canada and Lesser Snow Geese in the area of sympatry. I documented annual variation for all and spatial variation for some reproductive parameters measured. Results of between-area comparisons of reproductive performance tended to suggest that in some years, Canada Geese nesting in the area of sympatry contribute little towards the maintenance of the island segment of this population. During incubation when females were on nests, male behavior varied as a function of year, area, time-of-day, and incubation stage. Overall, male Canada Geese allocated their time primarily to vigilance, feeding, and resting when females were on the nest. Males in the area of allopatry were more vigilant and fed less compared to males in the area of sympatry. When females were on the nest, their behavior varied relative to time-of-day, incubation stage, and temperature. Females in the area of allopatry were more vigilant than females in the area of sympatry, but overall, females on the nest allocated their time primarily to resting and maintenance. Recess behavior of Canada Geese varied relative to sex, incubation stage, and temperature, but not area, though pairs in the area of allopatry tended to spend more time alert and less time feeding compared to pairs in the area of sympatry. During recesses, males allocated their time primarily to vigilance, whereas females allocated nearly equal proportions of time to feeding and maintenance. Overall, brood-rearing behavior varied relative to year, area, time-of-day, sex/age class, days since peak hatch, brood size, brood density, and temperature. Overall, results are indicative of exploitation competition and I suggest that present foraging conditions are insufficient to meet the energetic demands of breeding Canada Geese, as well as breeding and staging Lesser Snow Geese, molt-migrant Giant Canada Geese, and staging Atlantic Brant. Such an energy deficit is particularly detrimental to the growth and development of Canada Goose goslings resulting in locally poor recruitment which presumably will lead to a much depressed breeding population of Canada Geese on Akimiski Island. (Abstract shortened by UMI.).
Download or read book Ecology of Aleutian Canada Geese at Buldir Island Alaska written by G. Vernon Byrd and published by Washington, D.C. : U.S. Department of the Interior, Fish and Wildlife Service. This book was released on 1983 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Report on a study of the only known breeding population of the endangered Aleutian Canada goose (Brauta canadensis leucopareia) from 1974 to 1977 at Buldir Island, a western Aleutian island, Alaska.
Download or read book Ecology of Great Basin Canada Goose Broods in Southcentral Washington microform written by Eberhardt, Lester E. (Lester Earl) and published by Ann Arbor, Mich. : University Microfilms International. This book was released on 1987 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ecology of female Great Basin Canada geese (Branta canadensis moffitti) and their broods was studied during the rearing seasons of 1983 and 1984 on the Columbia River in southcentral Washington. The movements and activities of 41 adult female geese, marked with radio-transmitters, and their broods were monitored. Adult female geese used an average of 8.8 ± 4.4 (1 SD) km of the Columbia River to raise their broods to fledging. Movement rates of broods were not significantly influenced by age of goslings or weather patterns. Broods were relatively inactive at night and most mobile during late-morning hours. During the prefledging period, feeding was the predominate activity of broods and adult females, involving approximately 54% and 45% of the daylight hours, respectively. The activity budgets of both adult females and their broods changed dramatically at fledging. Time spent in inactive states and preening increased, while movement and feeding activity decreased. Broods preferred terrestrial habitats within 5 m of the shoreline over aquatic habitats. A shoreline pasture that was fertilized and grazed by cattle was an important foraging habitat to local broods, but did not attract broods from surrounding areas. Broods that utilized this pasture spent less time moving and were inactive more than broods that utilized only native habitats. These differences may be related to the increased amount of time required for broods in native habitats to search for adequate foraging sites. However, the total time spent feeding and growth rates of broods in the two types of habitat did not appear to differ, suggesting that the quality and quantity of native forages were sufficient to meet nutritional needs of broods. Broods appeared to be most susceptible to human disturbance during the first few weeks following hatching, but older broods were relatively tolerant of repeated human disturbance. Fifteen (55.6%) of the 27 adult females, for which the fate of the brood could be determined, fledged at least one gosling. Daily survival rates of goslings, based on the Mayfield method, were significantly lower during the first 14 days of life (0.971), as compared to the rest of the 70-day rearing season (0.995). The overall estimated survival rate for goslings during the rearing season was 0.491 ± 0.008 (2 SE), which was considerably lower than that previously recorded for this species. The reasons for the apparent low survival are unknown, but may partially reflect the increased ability of radio-telemetry techniques, compared to other more commonly used techniques, to detect gosling mortality. The significance of the apparent low survival rate is also unknown; however, the resident nesting population was increasing during the study period.
Download or read book The North American Geese written by Paul Johnsgard and published by Lulu.com. This book was released on 2016-08-23 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: The eight currently recognized species of North American geese are part of a familiar group of birds collectively called waterfowl, all of which are smaller than swans and generally larger than ducks. They include the most popular of our aquatic gamebirds, with several million shot each year by sport hunters. Our two most abundant waterfowl, the Canada goose and snow goose, have populations collectively totaling about 15 million individuals. Like swans, the lifelong pairbonding of geese, their familial care, and prolonged social attachment to their offspring are legendary. Their seasonal migratory flights sometimes span thousands of miles, and the sight of their long, wavering flight formations are as much the symbols of seasonal change as are the spring songs of cardinals or the appearance of autumnal leaf colors. This book describes each species' geographic range and subspecies, its identification traits, weights and measurements, and criteria for its age and sex determination. Ecological and behavioral information includes each species' breeding and wintering habitats, its foods and foraging behavior, its local and long distance movements, and its relationships with other species. Reproductive information includes each species' age of maturity, pair-bond pattern, pair-forming behaviors, usual clutch sizes and incubation periods, brooding behavior, and postbreeding behavior. Mortality sources and rates of egg, young, and adult losses are also summarized, and each species' past and current North American populations are estimated. In addition to a text of nearly 60,000 words, the book includes 8 maps, 21 line drawings, and 28 photographs by the author, as well as more than 700 literature citations.
