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Populations Of The Common Eider In Eastern North America

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Populations Of The Common Eider In Eastern North America

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Author : Austin Reed
language : en
Publisher:
Release Date :

Populations Of The Common Eider In Eastern North America written by Austin Reed and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on with Somateria categories.

Status Of The American Eider With Special Reference To Northern New England

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Author : William B. Krohn
language : en
Publisher:
Release Date : 1992

Status Of The American Eider With Special Reference To Northern New England written by William B. Krohn and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Bird populations categories.

Ecology And Conservation Of North American Sea Ducks

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Author : Jean-Pierre L. Savard
language : en
Publisher: CRC Press
Release Date : 2015-04-13

Ecology And Conservation Of North American Sea Ducks written by Jean-Pierre L. Savard and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-04-13 with Nature categories.

The past decade has seen a huge increase in the interest and attention directed toward sea ducks, the Mergini tribe. This has been inspired, in large part, by the conservation concerns associated with numerical declines in several sea duck species and populations, as well as a growing appreciation for their interesting ecological attributes. Reflec

Conservation Of The American Common Eider Somateria Mollissima Dresseri

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Author : Kristen Noel
language : en
Publisher:
Release Date : 2022

Conservation Of The American Common Eider Somateria Mollissima Dresseri written by Kristen Noel and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022 with categories.

American common eider (Somateria mollissima dresseri) populations in eastern North America have declined in recent years, and it is believed that this decline is linked to various environmental stressors across the subspecies' range. To evaluate where to focus future research to help conserve American common eiders, I used a two-step approach. First, a workshop was held to share current knowledge on the status of, and threats to, eiders in the many administrative jurisdictions of the subspecies' range. Second, I administered a questionnaire to various experts (e.g., government and university biologists, resource managers) across the American common eider range to assess what stages of the annual cycle should be prioritized for future research. Experts recommended that research and conservation tools be implemented particularly for the migration and wintering stages of the eider annual cycle, with breeding stages remaining issues as well. In Nova Scotia, experts agreed that avian predation (e.g., large gulls and raptors) on eider nests has increased in recent years. One conservation tool that may help alleviate predation is the deployment of nest shelters. Accordingly, I assessed nest shelters as a conservation tool for nesting females by examining occupancy rates and microclimate in two shelter types (wooden A-frames and plastic barrels) in eastern Nova Scotia. The proportion of shelters used by nesting American common eiders was similar between the two shelter types, although shelter occupancy rates varied considerably among islands. I found that wooden A-frame shelters more closely mimicked temperature and humidity in natural eider nesting habitat than plastic barrel shelters which created hot and dry conditions that may be cause for concern for the health of nesting hens (e.g., possibility of dehydration based on conversations with veterinarians). The wooden A-frame shelters examined in this thesis provide a suitable microclimate for eider nesting, suggesting that these shelters hold promise as a tool for eider conservation. A next step is to assess whether A-frame shelters can serve to reduce rates of nest predation relative to that in natural nesting habitat, particularly because avian predation remains a key issue to eider population dynamics. Eiders have a cultural significance to many Indigenous peoples, conservation organizations, and local hunters, and are a key bioindicator of the health of marine ecosystems. Bringing experts together was timely for identifying that more work must be done during the non-breeding season.

Ducks Geese And Swans Of North America

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Author : Guy A. Baldassarre
language : en
Publisher: JHU Press
Release Date : 2014

Ducks Geese And Swans Of North America written by Guy A. Baldassarre and has been published by JHU Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with Nature categories.

Ducks, Geese, and Swans of North America has been hailed as a classic since the first edition was published in 1942. A must-have for professional biologists, birders, waterfowl hunters, decoy collectors, and wildlife managers, this fully revised and updated edition provides definitive information on the continent's forty-six species. Maps of both winter and breeding ranges are presented with images by top waterfowl photographers and the acclaimed original artwork of Robert W. (Bob) Hines. Originally authored by F. H. Kortright and later revised by Frank Bellrose, this latest edition, which has been meticulously updated by renowned waterfowl biologist Guy Baldassarre, continues the legacy of esteemed authors. Each species account contains in-depth sections on: - identification - distribution - migration behavior - habitat - population status - breeding biology - rearing of young - recruitment and survival - food habits and feeding ecology - molts and plumages - conservation and management To facilitate identification, the species accounts also include detailed illustrations of wings. An appendix contains comparative illustrations of ducklings, goslings, and cygnets. Guy Baldassarre has hit the target. His remake of the Kortright/Bellrose classic provides good biological descriptions, wonderful photographs and illustrations, and easy-to-understand information about waterfowl. I would encourage every hunter and enthusiast to have these books as an educational guide to waterfowl and their needs.--H. Dale Hall, CEO, Ducks Unlimited, Inc. When, as an eleven-year-old in 1942, I read F. H. Kortright's first edition of this book, it altered the trajectory of my life. Every subsequent edition, including this latest update by Guy Baldassarre, has improved the landmark reference. I can't imagine that anyone interested in waterfowl or wetlands can live without this indispensable book.--Paul A. Johnsgard, University of Nebraska-Lincoln Creating a brand-new version of such a timeless and previously revised classic is a risky venture indeed, but nobody could be better suited for this monumental task than Guy Baldassarre. He has created a stunning new classic, at once magnificent in its visual appeal and truly comprehensive in its scientific breadth and depth. Hats off to Guy for dedicating himself to this project with such obvious passion, patience, and skill. This book absolutely belongs on the shelf or coffee table of anyone who has ever marveled at waterfowl, whether through their binoculars or from inside the duck blind.--John W. Fitzpatrick, Cornell Laboratory of Ornithology Guy Baldassarre was a professor of wildlife ecology at the State University of New York College of Environmental Science and Forestry in Syracuse until his death in 2012. He is the coauthor of the textbook, Waterfowl Ecology and Management. Johns Hopkins University Press Baltimore www.press.jhu.edu This product consists of two volumes, packaged in a slipcase along with a CD containing references and additional maps. ISBN 13: 978-1-4214-0751-7 ISBN 10: 1-4214-0751-5 [Use barcode for ISBN 13: 978-1-4214-0751-7] Cover design: Cover illustration: Northern Pintail. GaryKramer.net Author photo: HOLD SPACE FOR AUTHOR PHOTO X: \marketing\author photos --John W. Fitzpatrick, Cornell Lab of Ornithology "Midwest Book Review"

The North American Sea Ducks

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Author : Paul Johnsgard
language : en
Publisher: Lulu.com
Release Date : 2016-11-09

The North American Sea Ducks written by Paul Johnsgard and has been published by Lulu.com this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-11-09 with Science categories.

The 21 species of sea ducks are one of the larger subgroups (Tribe Mergini) of the waterfowl family Anatidae, and the 16 species (one historically extinct) that are native to North America represent the largest number to be found on any continent, and also the largest number of endemic sea duck species native to any continent. Although generally not important as game birds, the sea ducks include some economically important birds such as the eiders, the basis for the Arctic eiderdown industry and a historically important food source for some Native American cultures. They also include what is probably the most northerly breeding species of all waterfowl and an icon of Arctic bird life, the long-tailed duck. The sea ducks also include species having some of the most complex and diverse pair-forming postural and acoustic displays of all waterfowl (goldeneyes and bufflehead), and some of the deepest diving species of all waterfowl (scoters and long-tailed duck). Sea ducks are highly prone to population disasters caused by oil spills and other water contaminants and, like other seabirds, are among the first bird groups that are being affected by current global warming trends in polar regions. This book is an effort to summarize succinctly our current knowledge of sea duck biology and to provide a convenient survey of the vast technical literature on the group, with over 900 literature references. It also includes 90,000 words of text (more than 40 percent of which is new), 15 updated range maps, 11 black & white and 20 color photographs, over 30 ink drawings, and nearly 150 sketches. Lastly, the North American sea ducks include the now extinct Labrador duck, the only northern hemisphere waterfowl species to have gone extinct in modern times. I have gratefully reprinted a Labrador duck watercolor by Sir Peter Scott. Considering recent population crashes in other sea ducks, such as the Steller’s eider and spectacled eider, it should also offer a sobering reminder of the fragility of our natural world and its inhabitants, including us.

The Common Eider

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Author : Chris Waltho
language : en
Publisher: Bloomsbury Publishing
Release Date : 2015-01-15

The Common Eider written by Chris Waltho and has been published by Bloomsbury Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-01-15 with Nature categories.

A monograph of the Common Eider, a large and familiar duck with a long and fascinating cultural history. A common sight around the more northerly shores of the British Isles, the Common Eider is the largest duck in the northern hemisphere. The eider is particularly well adapted to cold-water environments; the insulating properties of eider down are iconic. The species is taxonomically interesting, with a range of well-marked subspecies reflecting the patterns of ice coverage during ancient glaciations, and these ducks have also provided the focus for a number of important behavioural studies, especially on feeding ecology and energy budgets. Eiders have a long association with humans, and have deep cultural significance in many societies. However, modern lifestyles are exposing these ducks to a wide range of new pressures. This monograph provides a comprehensive portrait of the Common Eider; authors Chris Waltho and John Coulson bring together an extensive and diverse international literature, with sections on taxonomy, habitats, breeding biology, population dynamics, diet and foraging, dispersal and migration, and conservation.