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Factors Influencing Pre And Post Fledging Growth And Survival Of Canada Goose Goslings On Akimiski Island Nunavut
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Book Synopsis Factors Influencing Pre- and Post-fledging Growth and Survival of Canada Goose Goslings on Akimiski Island, Nunavut by : Michael Robert John Hill
Download or read book Factors Influencing Pre- and Post-fledging Growth and Survival of Canada Goose Goslings on Akimiski Island, Nunavut written by Michael Robert John Hill and published by . This book was released on 1999 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Factors Influencing Pre- and Post-fledging Growth and Survival of Canada Goose Goslings on Akimiski Island, Nunavut by :
Download or read book Factors Influencing Pre- and Post-fledging Growth and Survival of Canada Goose Goslings on Akimiski Island, Nunavut written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Occasional Paper written by and published by . This book was released on 1957 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2000 with total page 956 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Jeffrey Scott Gleason Publisher :Library and Archives Canada = Bibliothèque et Archives Canada ISBN 13 : Total Pages :220 pages Book Rating :4.E/5 ( download)
Book Synopsis 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 by : Jeffrey Scott Gleason
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.).
Book Synopsis Occasional Papers by : Canadian Wildlife Service
Download or read book Occasional Papers written by Canadian Wildlife Service and published by . This book was released on 1957 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effect of Body Mass and Size on Late Summer Survival of Canada Goose (Branta Canadensis Interior) Goslings on Akimiski Island, Nunavut by : Keith Ashworth Patton
Download or read book The Effect of Body Mass and Size on Late Summer Survival of Canada Goose (Branta Canadensis Interior) Goslings on Akimiski Island, Nunavut written by Keith Ashworth Patton and published by . This book was released on 2001 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis American Doctoral Dissertations by :
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1999 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Dynamics of Condition Factors in Canada Geese and Their Relation to Seasonal Stresses by : Harold Carsten Hanson
Download or read book The Dynamics of Condition Factors in Canada Geese and Their Relation to Seasonal Stresses written by Harold Carsten Hanson and published by . This book was released on 1962 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Environmental Regulation of Growth in Black Brant by : Mark Paul Herzog
Download or read book Environmental Regulation of Growth in Black Brant written by Mark Paul Herzog and published by . This book was released on 2002 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Body size is an important determinant of life history traits such as survival and fecundity. There is a positive correlation between growth during the first summer and final body size in goose populations. I examined how environmental factors influence growth in Black Brant (Branta bernicla; hereafter brant) goslings. Growth declined seasonally and varied among brood-rearing areas. However, the pattern was not consistent among years. Models containing only environment and maternal effects explained 75% of variation in gosling mass, indicating that little of the observed variation in size is directly of genetic origin. Heritability did not differ from zero for both mother-daughter and father-daughter regressions. I also conducted an experiment to study the effect of gosling density on food abundance, feeding behavior, and development of brant goslings, in two habitat types important to brant: (1) Carex subspathacea grazing lawns and (2) slough levees which contain Triglochin palustris. Variation in grazing pressure was experimentally manipulated. Biomass and offtake of C. subspathacea was higher in lightly grazed plots than in heavily grazed plots even though goslings within heavily grazed plots spent more time feeding. Within slough levee habitat there were no differences between heavily and lightly grazed plots in either biomass or offtake of T. palustris. Peck rates were lower in slough levee habitat than in grazing lawns. Change in mass over an eight hour trial was positively correlated with the amount of forage biomass in the plot at the start of the trial. I found no variation in internal morphometrics or body composition among goslings. I also examined the relationship between forage available within a brood-rearing area, the number of birds using the area, and gosling growth. Annual variation in use of brood-rearing areas was correlated with forage availability. Gosling mass was negatively correlated with brood numbers when examined across all areas, however, within each brood-rearing area, the relationship between mass and numbers of birds was positive. I did not see a relationship between estimates of food availability (per m2) and brood numbers. Spatial variation in growth among habitats may result from habitats varying in quality and quantity of forage"--Leaf 4
Book Synopsis Factors Influencing Nesting Success of Sub-arctic Breeding Canada Geese by : Stacy K. Gan
Download or read book Factors Influencing Nesting Success of Sub-arctic Breeding Canada Geese written by Stacy K. Gan and published by . This book was released on 2012 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Factors Associated with Dusky Canada Goose Nesting and Nest Success on Artificial Nest Islands of the Western Copper River Delta by : Nicole Marie Maggiulli
Download or read book Factors Associated with Dusky Canada Goose Nesting and Nest Success on Artificial Nest Islands of the Western Copper River Delta written by Nicole Marie Maggiulli and published by . This book was released on 2008 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: The population of dusky Canada geese (Branta canadensis occidentalis; hereafter, dusky geese) nesting on the western Copper River Delta (CRD) in south- central Alaska has been in decline since the late 1970s. In an effort to alleviate mammalian predation, increase nest success, and avoid a listing under the U.S. Endangered Species Act, an artificial nest island (island) program was implemented on the western CRD in 1983. The installation of new islands on the CRD is the sole management action of the Pacific Flyway Council on the breeding grounds, but no comprehensive evaluation of the program has been published. I examined general trends in island use and nest success over time for three island types (donut islands, fiberglass floater islands, and sandbag islands) from 1984-2005. I used data from the island program to identify factors associated with dusky Canada goose nesting (hereafter, use) and nest success on islands from 1996-2005. I generated a series of candidate models and used logistic regression with model selection techniques to determine how variables representing pond characteristics, vegetative characteristics, interactions with conspecifics and larid species, the previous year's island status, and the distance to predator corridors were associated with island use and nest success for each year. Use of islands by dusky geese nesting on the western CRD increased between 1987 and 2005 from a low of 10% in 1987 to 44% in 2005. There was annual variability in factors associated with island use; however, use of islands was most consistently and strongly associated with the previous year's island status. The odds of a nest being placed on an island that contained a successful nest the previous year were 2.91 to 6.62 times greater than for islands not used the previous year. There was also evidence for an increased likelihood of island use further from shore and for islands with up to 55% aerial shrub cover and shrubs up to 1 m tall. Nest success was consistently high, indicating islands have long term potential for increasing dusky goose nest success on the Copper River Delta. Compared to island use, my analysis of nest success and habitat features resulted in many more competitive models (average 10 v. 2 per year) with fewer strong (95% confidence intervals for parameter estimates excluded zero) associations between explanatory variables and nest success. Explanatory variables representing vegetative characteristics, interactions with conspecifics and larid species, and the distance to predator corridors had a relatively low capacity to explain nest success on artificial islands. However, there was some evidence for an increased likelihood of nest success on islands further from shore with shorter shrubs. Lower variability in factors associated with island use is likely because factors associated with nest site selection are controlled by decisions of the nesting goose. The importance of previous year's island status on island use likely reflects high site fidelity by breeding adult geese, with fidelity being higher for birds that have successful nests. Alternately, dusky geese use cues from the previous year's nesting activity when prospecting for island nest sites. In contrast, nest success is dependent on a more complex combination of factors that vary within and among years outside the control of a nesting goose. Inter-annual variation in the timing and magnitude of eulachon (Thaleichthys pacificus) spawning runs on large sloughs of the CRD and prey-switching by important dusky goose nest predators may have considerable influence on dusky goose nest success on islands, similar to mainland- nesting dusky geese. The inability to control for eulachon presence and abundance may have confounded my analysis of habitat features important to nest success. Therefore, factors such as presence of alternate prey (and predator abundance) may be more important to dusky goose nest success on islands than habitat features. Current use of available nest islands is at a program high of 44% and nest success also remains high (63%); suggesting the artificial nest island program is valuable for dusky geese. However, the contribution of island-nesting dusky geese to the dusky goose population on the Copper River Delta is unclear. There is a need for a population model that incorporates all recent information on dusky goose reproductive ecology to determine if artificial nest islands can increase dusky goose population size, and if so, how many islands are needed.
Book Synopsis Nesting Success, Gosling Growth, and Adult Body Condition of Giant Canada Geese (Branta Canadensis Maxima) in Southern Illinois by : Michael R. Sertle
Download or read book Nesting Success, Gosling Growth, and Adult Body Condition of Giant Canada Geese (Branta Canadensis Maxima) in Southern Illinois written by Michael R. Sertle and published by . This book was released on 2006 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding factors that influence reproductive success is important for managing waterfowl populations. Current breeding density of giant Canada geese ( Branta canadensis maxima ) in the northern 2/3 of Illinois is three times greater than that of the southern 1/3 of Illinois. Previous research indicates that goose population abundance is most likely influenced by mortality of adults, nest success, and gosling growth. In this study, I examined the aspects of fecundity that are most likely to affect giant Canada goose reproduction in southern Illinois: clutch size, nest success, and gosling growth. The average clutch size was 5.0 eggs/nest, and the average nest success was estimated to be 60%. Adult male geese in northern and central Illinois tended to be in better body condition than males in southern Illinois. There was, however, no difference in adult body condition of females between northern, central, and southern Illinois.
Book Synopsis Limitations on Canada Goose Production at Fish Springs National Wildlife Refuge, Utah by : Dorie S. Stolley
Download or read book Limitations on Canada Goose Production at Fish Springs National Wildlife Refuge, Utah written by Dorie S. Stolley and published by . This book was released on 1998 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Home Grown Honkers by : Herbert H. Dill
Download or read book Home Grown Honkers written by Herbert H. Dill and published by . This book was released on 1970 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Giant Canada Goose by : Harold Carsten Hanson
Download or read book The Giant Canada Goose written by Harold Carsten Hanson and published by Southern Illinois University Press. This book was released on 1997 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This revised edition is not an expanded version of the original, summarizing, for example, the dozens of studies that hve been made of the productivity of various subpopulations of the "Giant Canada Goose" since its rediscovery. Rather, the main objectives of this revised, slightly enlarged edition are to redefine the range of this race as it was originally understood and to correct earlier assumptions based on the literature as to racial identity of peripheral populations."--Page xvii.
Book Synopsis Limnology and Aquatic Birds by : Alan R. Hanson
Download or read book Limnology and Aquatic Birds written by Alan R. Hanson and published by Springer Science & Business Media. This book was released on 2009-03-20 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: Long-term population monitoring is an important tool in our investigations of the role waterbirds play in their environment. This book is international in scope and presents information on species as diverse as the Common Loon, Harlequin Duck, and Semi-Palmated Sandpiper, and habitat in locations ranging from Iceland to Japan. Papers presented in this volume further our understanding of the important role that limnology plays in determining habitat suitability for waterbirds.