COSEWIC Assessment Results
Author: COSEWIC Secretariat (Canada)
Publisher:
Published: 2003
Total Pages: 50
ISBN-13:
DOWNLOAD EBOOKRead and Download eBook Full
Author: COSEWIC Secretariat (Canada)
Publisher:
Published: 2003
Total Pages: 50
ISBN-13:
DOWNLOAD EBOOKAuthor: Walter Koelz
Publisher:
Published: 1929
Total Pages: 382
ISBN-13:
DOWNLOAD EBOOKAuthor: Stanford Environmental Law Society
Publisher: Stanford Environmental Law Soc
Published: 2001
Total Pages: 296
ISBN-13: 9780804738439
DOWNLOAD EBOOKThis handbook is a guide to the federal Endangered Species Act, the primary U.S. law aimed at protecting species of animals and plants from human threats to their survival. It is intended for lawyers, government agency employees, students, community activists, businesspeople, and any citizen who wants to understand the Act--its history, provisions, accomplishments, and failures.
Author: Margaret F. Docker
Publisher: Springer
Published: 2019-06-03
Total Pages: 590
ISBN-13: 9402416846
DOWNLOAD EBOOKThis book, published in two volumes, provides the most comprehensive review of lamprey biology since Hardisty and Potter’s “The Biology of Lampreys” published more than 30 years ago. This second volume offers a synthesis of topics related to the lamprey gonad (e.g., lamprey sex ratios, sex determination and sex differentiation, sexual maturation, and sex steroids), the artifical propagation of lampreys, post-metamorphic feeding and the evolution of alternative feeding and migratory types, the history and status of sea lamprey control in the Laurentian Great Lakes and Lake Champlain, and an overview of contributions of lamprey developmental studies for understanding vertebrate evolution.
Author: Gene S. Helfman
Publisher: Island Press
Published: 2007-07-15
Total Pages: 0
ISBN-13: 9781559635967
DOWNLOAD EBOOKFish Conservation offers, for the first time in a single volume, a readable reference with a global approach to marine and freshwater fish diversity and fishery resource issues. Gene Helfman brings together available knowledge on the decline and restoration of freshwater and marine fishes, providing ecologically sound answers to biodiversity declines as well as to fishery management problems at the subsistence, recreational, and commercial levels. Written in an engaging and accessible style, the book: considers the value of preserving aquatic biodiversity offers an overview of imperiled fishes on a taxonomic and geographic basis presents a synthesis of common characteristics of imperiled fishes and their habitats details anthropogenic causes of decline examines human exploitation issues addresses ethical questions surrounding exploitation of fishes The final chapter integrates topics and evaluates prospects for arresting declines, emphasizing the application of evolutionary and ecological principles in light of projected trends. Throughout, Helfman provides examples, explores case studies, and synthesizes available information from a broad taxonomic, habitat, and geographic range. Fish Conservation summarizes the current state of knowledge about the degradation and restoration of diversity among fishes and the productivity of fishery resources, pointing out areas where progress has been made and where more needs to be done. Solutions focus on the application of ecological knowledge to solving practical problems, recognizing that effective biodiversity conservation depends on meeting human needs through management that focuses on long term sustainability and an ecosystem perspective.
Author:
Publisher:
Published: 1995
Total Pages: 682
ISBN-13:
DOWNLOAD EBOOKCoverage: 1982- current; updated: monthly. This database covers current ecology research across a wide range of disciplines, reflecting recent advances in light of growing evidence regarding global environmental change and destruction. Major ares of subject coverage include: Algae/lichens, Animals, Annelids, Aquatic ecosystems, Arachnids, Arid zones, Birds, Brackish water, Bryophytes/pteridophytes, Coastal ecosystems, Conifers, Conservation, Control, Crustaceans, Ecosyst em studies, Fungi, Grasses, Grasslands, High altitude environments, Human ecology, Insects, Legumes, Mammals, Management, Microorganisms, Molluscs, Nematodes, Paleo-ecology, Plants, Pollution studies, Reptiles, River basins, Soil, TAiga/tundra, Terrestrial ecosystems, Vertebrates, Wetlands, Woodlands.
Author: Brian W. Coad
Publisher: University of Toronto Press
Published: 2018-01-01
Total Pages: 633
ISBN-13: 1442647108
DOWNLOAD EBOOKMarine Fishes of Arctic Canada is an accessible and up-to-date study on the diverse marine fish population existing in Canadian waters.
Author:
Publisher:
Published: 2010-10
Total Pages: 120
ISBN-13:
DOWNLOAD EBOOKAuthor:
Publisher: Nature Alberta
Published: 2007
Total Pages: 648
ISBN-13: 9780969613497
DOWNLOAD EBOOKAuthor: Robert G. Forsyth
Publisher:
Published: 2004
Total Pages: 206
ISBN-13:
DOWNLOAD EBOOK"Snails and slugs have a reputation as slimy, repulsive creatures that are nothing more than garden pests, but they are important components of the ecosystems they live in. In fact, most of the pest slugs and snails are introduced species that have come here with the plants we import for our gardens. Worldwide there are more species of snails and slugs than all the mammals, birds, reptiles and amphibians combined, yet they are often overlooked because of their relatively small size. Land snails and slugs are well adapted to live in almost any kind of environment, from high arctic tundra to tropical forests. In British Columbia, they can be found just about everywhere. Land Snails of British Columbia describes all 92 species of terrestrial molluscs in our province. It includes photographs and detailed drawings of each, diagnostic keys and a selection of colour photographs to aid in identification. With each species description, the author discusses its natural history and distribution in the province. He also talks about reproduction, life history, diet, locomotion and shell structure (even slugs have shells). Nature buffs and anyone interested in looking past the bad reputation of these much-maligned creatures will find this handbook an enlightening guide. For gardeners, this book will tell you which snails to cast out of your garden and which ones to keep, because some snails and slugs are beneficial to gardens and some even prey on their pestilent relatives."--