Using Landscape-scale Habitat Models to Predict Potential Abundance of Potamodromous Fishes Above Dams on Great Lakes Tributaris
Author: Sara M. Creque
Publisher:
Published: 2002
Total Pages: 145
ISBN-13:
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Author: Sara M. Creque
Publisher:
Published: 2002
Total Pages: 145
ISBN-13:
DOWNLOAD EBOOKAuthor: T. Edsall
Publisher: Aquatic Ecosystem Health & Mgmt Soc
Published: 2005
Total Pages: 668
ISBN-13:
DOWNLOAD EBOOKThis volume, cataloging and analyzing the current science on the state of Lake Michigan, is an important part of Great Lakes recovering science. It carries forward the singular contribution that the binational Great Lakes scientific community has made not only to restoring the Great Lakes but also to the world's body of knowledge about large lake ecology, the long-range transport of pollutants, and the importance of habitat in ensuring ecosystem health.
Author: Bror Jonsson
Publisher: Springer Science & Business Media
Published: 2011-05-03
Total Pages: 720
ISBN-13: 9400711891
DOWNLOAD EBOOKDestruction of habitat is the major cause for loss of biodiversity including variation in life history and habitat ecology. Each species and population adapts to its environment, adaptations visible in morphology, ecology, behaviour, physiology and genetics. Here, the authors present the population ecology of Atlantic salmon and brown trout and how it is influenced by the environment in terms of growth, migration, spawning and recruitment. Salmonids appeared as freshwater fish some 50 million years ago. Atlantic salmon and brown trout evolved in the Atlantic basin, Atlantic salmon in North America and Europe, brown trout in Europe, Northern Africa and Western Asia. The species live in small streams as well as large rivers, lakes, estuaries, coastal seas and oceans, with brown trout better adapted to small streams and less well adapted to feeding in the ocean than Atlantic salmon. Smolt and adult sizes and longevity are constrained by habitat conditions of populations spawning in small streams. Feeding, wintering and spawning opportunities influence migratory versus resident lifestyles, while the growth rate influences egg size and number, age at maturity, reproductive success and longevity. Further, early experiences influence later performance. For instance, juvenile behaviour influences adult homing, competition for spawning habitat, partner finding and predator avoidance. The abundance of wild Atlantic salmon populations has declined in recent years; climate change and escaped farmed salmon are major threats. The climate influences through changes in temperature and flow, while escaped farmed salmon do so through ecological competition, interbreeding and the spreading of contagious diseases. The authors pinpoint essential problems and offer suggestions as to how they can be reduced. In this context, population enhancement, habitat restoration and management are also discussed. The text closes with a presentation of what the authors view as major scientific challenges in ecological research on these species.
Author: Food and Agriculture Organization of the United Nations
Publisher: Food & Agriculture Org.
Published: 2001
Total Pages: 180
ISBN-13: 9789251046944
DOWNLOAD EBOOKThe importance of free longitudinal passage of river fauna is stressed.
Author: U.S. Fish and Wildlife Service. Office of Biological Services
Publisher:
Published: 1982
Total Pages: 170
ISBN-13:
DOWNLOAD EBOOKAuthor: Ellen E. Wohl
Publisher:
Published: 2019
Total Pages: 209
ISBN-13: 0190943521
DOWNLOAD EBOOKSaving the Dammed follows the course of the seasons throughout one representative year at a beaver meadow in Rocky Mountain National Park, Colorado. The seasonal changes provide a backdrop against which to explore how beavers change river valleys and how the decline in beaver populations has altered river ecosystems.
Author: Jeffrey J. Duda
Publisher:
Published: 2011
Total Pages: 276
ISBN-13:
DOWNLOAD EBOOKAuthor: David Dudgeon
Publisher: Cambridge University Press
Published: 2020-05-21
Total Pages: 517
ISBN-13: 1108882625
DOWNLOAD EBOOKGrowing human populations and higher demands for water impose increasing impacts and stresses upon freshwater biodiversity. Their combined effects have made these animals more endangered than their terrestrial and marine counterparts. Overuse and contamination of water, overexploitation and overfishing, introduction of alien species, and alteration of natural flow regimes have led to a 'great thinning' and declines in abundance of freshwater animals, a 'great shrinking' in body size with reductions in large species, and a 'great mixing' whereby the spread of introduced species has tended to homogenize previously dissimilar communities in different parts of the world. Climate change and warming temperatures will alter global water availability, and exacerbate the other threat factors. What conservation action is needed to halt or reverse these trends, and preserve freshwater biodiversity in a rapidly changing world? This book offers the tools and approaches that can be deployed to help conserve freshwater biodiversity.
Author: Margaret F. Docker
Publisher: Springer
Published: 2014-11-24
Total Pages: 451
ISBN-13: 9401793069
DOWNLOAD EBOOKThe book provides the most comprehensive review of lamprey biology since Hardisty and Potter’s five-volume “The Biology of Lampreys” published more than 30 years ago. Published in two volumes, it includes contributions from international lamprey experts, reviewing and providing new insights into the evolution, general biology, and management of lampreys worldwide. This first volume offers up-to-date chapters on the systematics, general biology, conservation status, and conservation needs of lampreys. It will serve as an important reference for researchers working on any aspect of lamprey biology and fishery managers whose mandate is to control or conserve lamprey populations.
Author: Gerry Closs
Publisher: Cambridge University Press
Published: 2016
Total Pages: 601
ISBN-13: 1107040116
DOWNLOAD EBOOKA global assessment of the current state of freshwater fish biodiversity and the opportunities and challenges to conservation.