Author: Frances Backhouse
Publisher: Orca Book Publishers
ISBN: 1459824717
Category : Juvenile Nonfiction
Languages : en
Pages : 207
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Book Description
By cutting trees and building dams, beavers shape landscapes and provide valuable wetland homes for many plants and animals. These radical rodents were once almost hunted to extinction for their prized fur, but today we are building a new relationship with them, and our appreciation of the benefits they offer as habitat creators and water stewards is growing. Packed with facts and personal stories, this book looks at the beaver’s biology and behavior and illuminates its vital role as a keystone species. The beaver’s comeback is one of North America’s greatest conservation success stories and Beavers: Radical Rodents and Ecosystem Engineers introduces readers to the conservationists, scientists and young people who are working to build a better future for our furry friends. The epub edition of this title is fully accessible.
Author: Ben Goldfarb
Publisher: Chelsea Green Publishing
ISBN: 160358739X
Category : Nature
Languages : en
Pages : 314
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Book Description
Our modern idea of what a healthy landscape looks like and how it functions is distorted by the fur trade that once trapped out millions of beavers from North America's lakes and rivers. Goldfarb shares the powerful story about one of the world's most influential species. He explains how North America was colonized, how our landscapes have changed over the centuries, and how beavers can help us fight drought, flooding, wildfire, extinction, and the ravages of climate change. -- adapted from jacket
Author: Norman S. Wolf
Publisher: Springer Science & Business Media
ISBN: 904813465X
Category : Medical
Languages : en
Pages : 397
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Book Description
determined by an inability to move in response to touch. C. elegans develop through four larval stages following hatching and prior to adulthood. Adult C. elegans are reproductive for about the rst week of adulthood followed by approximately two weeks of post-reproductive adulthood prior to death. Life span is most commonly measured in the laboratory by maintaining the worms on the surface of a nutrie- agar medium (Nematode Growth Medium, NGM) with E. coli OP50 as the bacterial food source (REF). Alternative culture conditions have been described in liquid media; however, these are not widely used for longevity studies. Longevity of the commonly used wild type C. elegans hermaphrodite (N2) varies ? from 16 to 23 days under standard laboratory conditions (20 C, NGM agar, E. coli OP50 food source). Life span can be increased by maintaining animals at lower ambient temperatures and shortened by raising the ambient temperature. Use of a killed bacterial food source, rather than live E. coli, increases lifespan by 2–4 days, and growth of adult animals in the absence of bacteria (axenic growth or bac- rial deprivation) increases median life span to 32–38 days [3, 23, 24]. Under both standard laboratory conditions and bacterial deprivation conditions, wild-derived C. elegans hermaphrodites exhibit longevity comparable to N2 animals [25].
Author: Róisín Campbell-Palmer
Publisher: Pelagic Publishing Ltd
ISBN: 1784270407
Category : Science
Languages : en
Pages : 62
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Book Description
The Eurasian beaver was near extinction at the start of the twentieth century, hunted across Europe for its fur, meat and castoreum. But now the beaver is on the brink of a comeback, with wild beaver populations, licensed and unlicensed, emerging all over Britain.
Author: David J. Hafner
Publisher: IUCN
ISBN: 9782831704630
Category : Nature
Languages : en
Pages : 188
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Book Description
The first comprehensive treatment of North American rodents of conservation concern. This action plan summarizes the rodent fauna of North America and provides available information on every rodent taxon that has been considered to be of conservation concern by state, provincial and private conservation agencies and regional experts. It is hoped that the survey provided in this action plan will serve as a common ground for all these parties in drawing up conservation strategies for rodents.
Author: Megan Borgert-Spaniol
Publisher: Blastoff! Readers
ISBN: 9781626172562
Category : American beaver
Languages : en
Pages : 0
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Book Description
"Simple text and full-color photography introduce beginning readers to American beavers. Developed by literacy experts for students in kindergarten through third grade"--
Author: Richard Weigl
Publisher:
ISBN:
Category : Health & Fitness
Languages : en
Pages : 220
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Book Description
This publication contains many data of historical and present longevities of captive mammals, some of the data was never published before as well as many of extinct or very rare species and subspecies. 3398 taxa of 25 mammalian (all orders except Shrew-opossums, Order Paucituberculata) have been exhibited in zoos and other institutions. The records provide dates of arrival, birth, movement out of the collection or death dates, showing day, month and year.
Author: Joel Sartore
Publisher: National Geographic Books
ISBN: 1426217773
Category : Nature
Languages : en
Pages : 404
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Book Description
This book of photography represents National Geographic's Photo Ark, a major cross-platform initiative and lifelong project by photographer Joel Sartore to make portraits of the world's animals -- especially those that are endangered. His message: to know these animals is to save them. Sartore intends to photograph every animal in captivity in the world. He is circling the globe, visiting zoos and wildlife rescue centers to create studio portraits of 12,000 species, with an emphasis on those facing extinction. He has photographed more than 6,000 already and now, thanks to a multi-year partnership with National Geographic, he may reach his goal. This book showcases his animal portraits: from tiny to mammoth, from the Florida grasshopper sparrow to the greater one-horned rhinoceros. Paired with the prose of veteran wildlife writer Douglas Chadwick, this book presents an argument for saving all the species of our planet.
Author: Frances Backhouse
Publisher: ECW/ORIM
ISBN: 1770907556
Category : Nature
Languages : en
Pages : 202
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Book Description
“Unexpectedly delightful reading—there is much to learn from the buck-toothed rodents of yore” (National Post). Beavers, those icons of industriousness, have been gnawing down trees, building dams, shaping the land, and creating critical habitat in North America for at least a million years. Once one of the continent’s most ubiquitous mammals, they ranged from the Atlantic to the Pacific, and from the Rio Grande to the edge of the northern tundra. Wherever there was wood and water, there were beavers—sixty million, or more—and wherever there were beavers, there were intricate natural communities that depended on their activities. Then the European fur traders arrived. Once They Were Hats examines humanity’s fifteen-thousand–year relationship with Castor canadensis, and the beaver’s even older relationship with North American landscapes and ecosystems. From the waterlogged environs of the Beaver Capital of Canada to the wilderness cabin that controversial conservationist Grey Owl shared with pet beavers; from a bustling workshop where craftsmen make beaver-felt cowboy hats using century-old tools to a tidal marsh where an almost-lost link between beavers and salmon was recently found, it’s a journey of discovery to find out what happened after we nearly wiped this essential animal off the map, and how we can learn to live with beavers now that they’re returning. “Fascinating and smartly written.” —The Globe and Mail (Toronto)
Author: Ilo Hiller
Publisher: Texas A&M University Press
ISBN: 9780890964279
Category : Juvenile Nonfiction
Languages : en
Pages : 116
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Book Description
Introduces the mammals of Texas, examining such species as the prairie dog, beaver, armadillo, and porcupine.
